fix transforms from handler

CMakeConfig.in.h

@@ -34,7 +34,9 @@
 #cmakedefine HAVE_FLOOR
 
 /* Having Geant4 installed */
+#ifndef HAVE_GEANT4
 #cmakedefine HAVE_GEANT4
+#endif
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #cmakedefine HAVE_INTTYPES_H

CMakeLists.txt

@@ -3,7 +3,14 @@
 ##### CMAKE LISTS ##############################################################
 ################################################################################
 
+if(EXISTS "${CMAKE_BINARY_DIR}/conan_toolchain.cmake")
+    include("${CMAKE_BINARY_DIR}/conan_toolchain.cmake")
+endif()
+
 cmake_minimum_required (VERSION 3.26)
+
+set(QT_NO_VERSION_CHECK TRUE)
+
 if(POLICY CMP0167)
     cmake_policy(SET CMP0167 NEW)
 endif()
@@ -107,6 +114,8 @@ set(Boost_USE_MULTITHREADED ON)
 set(Boost_USE_STATIC_RUNTIME OFF)
 message(STATUS "CMAKE_PREFIX_PATH is ${CMAKE_PREFIX_PATH}")
 
+find_package(HDF5 REQUIRED CONFIG)
+
 find_package(Boost 1.45.0 COMPONENTS program_options serialization unit_test_framework REQUIRED)
 include_directories(${Boost_INCLUDE_DIRS})
 
@@ -118,15 +127,12 @@ find_package(ROOT CONFIG REQUIRED)
 include(${ROOT_USE_FILE})
 
 find_package(VTK REQUIRED)
-# include(${VTK_USE_FILE})
-
 find_package(pybind11 REQUIRED)
 
-
 option(CENTOS_SUPPORT "VTK definitions for CentOS" OFF)
 if(CENTOS_SUPPORT)
     find_package(VTK CONFIG REQUIRED)
-    include(${VTK_USE_FILE})
+    # include(${VTK_USE_FILE})
 else()
     find_package(VTK REQUIRED
                      COMPONENTS CommonColor
@@ -146,7 +152,36 @@ else()
                                 RenderingFreeType
                                 RenderingGL2PSOpenGL2
                                 RenderingOpenGL2
-                                RenderingVolumeOpenGL2)
+                                RenderingVolumeOpenGL2
+                                IOGeometry
+                                GUISupportQt)
+endif()
+
+find_package(Qt6 COMPONENTS Widgets)
+if(Qt6_FOUND)
+    add_compile_definitions(HAVE_QT)
+endif()
+
+find_package(Geant4)
+if(Geant4_FOUND)
+    message(STATUS "Geant4 libs: ${Geant4_LIBRARIES}")
+    add_compile_definitions(HAVE_GEANT4)
+    set(HAVE_GEANT4 1)
+
+    # Sanitize Geant4 targets to remove Qt5 dependencies that conflict with VTK/Qt6
+    if(TARGET Geant4::G4interfaces)
+        set_target_properties(Geant4::G4interfaces PROPERTIES 
+            INTERFACE_LINK_LIBRARIES "Geant4::G4global;Geant4::G4graphics_reps;Geant4::G4intercoms"
+        )
+    endif()
+    if(TARGET Geant4::G4OpenGL)
+        set_target_properties(Geant4::G4OpenGL PROPERTIES 
+            INTERFACE_LINK_LIBRARIES "Geant4::G4vis_management;Geant4::G4graphics_reps;Geant4::G4geometry;Geant4::G4materials;Geant4::G4intercoms;Geant4::G4global;OpenGL::GL;OpenGL::GLU"
+        )
+    endif()
+else()
+    message(STATUS "Geant4 NOT found - optional features will be disabled")
+    set(HAVE_GEANT4 0)
 endif()
 
 set(CMAKE_REQUIRED_INCLUDES CMAKE_REQUIRED_INCLUDES math.h)
@@ -204,8 +239,8 @@ add_subdirectory(${SRC_DIR}/Core)
 include_directories(${SRC_DIR}/Math)
 add_subdirectory(${SRC_DIR}/Math)
 
-include_directories(${SRC_DIR}/Detectors)
-add_subdirectory(${SRC_DIR}/Detectors)
+include_directories(${SRC_DIR}/HEP)
+add_subdirectory(${SRC_DIR}/HEP)
 
 include_directories(${SRC_DIR}/Root)
 add_subdirectory(${SRC_DIR}/Root)
@@ -215,7 +250,7 @@ add_subdirectory(${SRC_DIR}/Vtk)
 
 add_subdirectory(${SRC_DIR}/Python)
 
-#add_subdirectory("${SRC_DIR}/utils/make_recipe")
+add_subdirectory(app)
 
 ## Documentation and packages
 

app/CMakeLists.txt

@@ -0,0 +1,3 @@
+if(HAVE_GEANT4)
+    add_subdirectory(gcompose)
+endif()

app/gcompose/CMakeLists.txt

@@ -0,0 +1,53 @@
+
+add_executable(gcompose 
+    src/main.cpp
+    src/MainWindow.h
+    src/MainWindow.cpp
+    src/ViewportPane.h
+    src/ViewportPane.cpp
+    src/MainPanel.h
+    src/MainPanel.cpp
+    src/ContextPanel.h
+    src/ContextPanel.cpp
+    src/ContextModel.h
+    src/ContextModel.cpp
+    src/StyleManager.h
+    src/StyleManager.cpp
+    src/PropertyWidgets.h
+    src/PropertyWidgets.cpp
+    src/PropertiesPanel.h
+    src/PropertiesPanel.cpp
+)
+
+set_target_properties(gcompose PROPERTIES
+    AUTOMOC ON
+    AUTOUIC ON
+    AUTORCC ON
+)
+
+target_include_directories(gcompose PRIVATE 
+    ${SRC_DIR}
+    ${PROJECT_BINARY_DIR}
+    ${Geant4_INCLUDE_DIRS}
+    ${VTK_INCLUDE_DIRS}
+)
+
+# Filter Geant4 libraries to remove Qt-dependent ones
+set(Geant4_LIBS_FILTERED ${Geant4_LIBRARIES})
+if(Geant4_LIBS_FILTERED)
+    list(REMOVE_ITEM Geant4_LIBS_FILTERED Geant4::G4interfaces Geant4::G4OpenGL Geant4::G4visQt3D)
+endif()
+
+target_link_libraries(gcompose
+    mutomCore
+    mutomMath
+    mutomGeant
+    mutomVtk
+    mutomRoot
+    ${Geant4_LIBS_FILTERED}
+    ${VTK_LIBRARIES}
+    Qt6::Widgets
+    VTK::GUISupportQt
+)
+
+install(TARGETS gcompose RUNTIME DESTINATION bin)

app/gcompose/src/ContextModel.cpp

@@ -0,0 +1,161 @@
+#include "ContextModel.h"
+#include <QString>
+#include <typeinfo>
+#include <cxxabi.h>
+#include <functional>
+#include "Core/Object.h"
+
+ContextModel::ContextModel(QObject* parent) 
+    : QAbstractItemModel(parent), m_rootContext(nullptr) {}
+
+ContextModel::~ContextModel() {}
+
+void ContextModel::setContext(uLib::ObjectsContext* context) {
+    beginResetModel();
+    m_rootContext = context;
+    if (m_rootContext) {
+        uLib::Object::connect(m_rootContext, &uLib::Object::Updated, [this]() {
+            this->beginResetModel();
+            this->endResetModel();
+        });
+    }
+    endResetModel();
+}
+
+QModelIndex ContextModel::index(int row, int column, const QModelIndex& parent) const {
+    if (!hasIndex(row, column, parent) || !m_rootContext) {
+        return QModelIndex();
+    }
+
+    if (!parent.isValid()) {
+        if (row < m_rootContext->GetCount()) {
+            return createIndex(row, column, m_rootContext->GetObject(row));
+        }
+    } else {
+        uLib::Object* parentObj = static_cast<uLib::Object*>(parent.internalPointer());
+        uLib::ObjectsContext* parentCtx = dynamic_cast<uLib::ObjectsContext*>(parentObj);
+        if (parentCtx && row < parentCtx->GetCount()) {
+            return createIndex(row, column, parentCtx->GetObject(row));
+        }
+    }
+    return QModelIndex();
+}
+
+QModelIndex ContextModel::parent(const QModelIndex& child) const {
+    if (!child.isValid() || !m_rootContext) {
+        return QModelIndex();
+    }
+
+    uLib::Object* childObj = static_cast<uLib::Object*>(child.internalPointer());
+    
+    // Finding the parent of childObj is O(N) since there is no parent pointer.
+    // We just do a recursive search starting from root context.
+    std::function<uLib::ObjectsContext*(uLib::ObjectsContext*, uLib::Object*)> findParent = 
+        [&findParent](uLib::ObjectsContext* ctx, uLib::Object* target) -> uLib::ObjectsContext* {
+        for (const auto& obj : ctx->GetObjects()) {
+            if (obj == target) return ctx;
+            if (auto subCtx = dynamic_cast<uLib::ObjectsContext*>(obj)) {
+                if (auto p = findParent(subCtx, target)) return p;
+            }
+        }
+        return nullptr;
+    };
+
+    uLib::ObjectsContext* parentCtx = findParent(m_rootContext, childObj);
+    if (!parentCtx || parentCtx == m_rootContext) {
+        return QModelIndex(); // Root items have invalid parent index
+    }
+
+    // Now need to find the row of parentCtx in its own parent Context.
+    uLib::ObjectsContext* grandParentCtx = findParent(m_rootContext, parentCtx);
+    if (!grandParentCtx) grandParentCtx = m_rootContext;
+
+    int row = -1;
+    for (size_t i = 0; i < grandParentCtx->GetCount(); ++i) {
+        if (grandParentCtx->GetObject(i) == parentCtx) {
+            row = (int)i;
+            break;
+        }
+    }
+
+    if (row != -1) {
+        return createIndex(row, 0, parentCtx);
+    }
+    return QModelIndex();
+}
+
+int ContextModel::rowCount(const QModelIndex& parent) const {
+    if (!m_rootContext) return 0;
+
+    if (!parent.isValid()) {
+        return m_rootContext->GetCount();
+    }
+
+    uLib::Object* parentObj = static_cast<uLib::Object*>(parent.internalPointer());
+    if (auto parentCtx = dynamic_cast<uLib::ObjectsContext*>(parentObj)) {
+        return parentCtx->GetCount();
+    }
+    return 0; // leaf node
+}
+
+int ContextModel::columnCount(const QModelIndex& parent) const {
+    return 1;
+}
+
+static QString getDemangledName(const std::type_info& info) {
+    int status = -4;
+    char* demangled = abi::__cxa_demangle(info.name(), nullptr, nullptr, &status);
+    QString res = (status == 0 && demangled) ? QString::fromUtf8(demangled) : QString::fromUtf8(info.name());
+    if (demangled) free(demangled);
+    
+    // Remove namespaces
+    int lastColon = res.lastIndexOf("::");
+    if (lastColon != -1) {
+        res = res.mid(lastColon + 2);
+    }
+    
+    // Remove "class " prefix if any
+    if (res.startsWith("class ")) res = res.mid(6);
+    return res;
+}
+
+QVariant ContextModel::data(const QModelIndex& index, int role) const {
+    if (!index.isValid()) return QVariant();
+
+    uLib::Object* obj = static_cast<uLib::Object*>(index.internalPointer());
+    
+    if (role == Qt::DisplayRole) {
+        QString typeName = getDemangledName(typeid(*obj));
+        std::string instName = obj->GetInstanceName();
+        if (instName.empty()) return typeName;
+        return QString("%1 (%2)").arg(QString::fromStdString(instName)).arg(typeName);
+    }
+    
+    if (role == Qt::EditRole) {
+        return QString::fromStdString(obj->GetInstanceName());
+    }
+    
+    return QVariant();
+}
+
+QVariant ContextModel::headerData(int section, Qt::Orientation orientation, int role) const {
+    if (orientation == Qt::Horizontal && role == Qt::DisplayRole && section == 0) {
+        return "Object Context";
+    }
+    return QVariant();
+}
+
+Qt::ItemFlags ContextModel::flags(const QModelIndex& index) const {
+    if (!index.isValid()) return Qt::NoItemFlags;
+    return Qt::ItemIsEditable | Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+}
+
+bool ContextModel::setData(const QModelIndex& index, const QVariant& value, int role) {
+    if (index.isValid() && role == Qt::EditRole) {
+        uLib::Object* obj = static_cast<uLib::Object*>(index.internalPointer());
+        obj->SetInstanceName(value.toString().toStdString());
+        emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
+        return true;
+    }
+    return false;
+}

app/gcompose/src/ContextModel.h

@@ -0,0 +1,28 @@
+#ifndef CONTEXT_MODEL_H
+#define CONTEXT_MODEL_H
+
+#include <QAbstractItemModel>
+#include "Core/ObjectsContext.h"
+
+class ContextModel : public QAbstractItemModel {
+    Q_OBJECT
+public:
+    explicit ContextModel(QObject* parent = nullptr);
+    virtual ~ContextModel();
+
+    void setContext(uLib::ObjectsContext* context);
+
+    QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex& child) const override;
+    int rowCount(const QModelIndex& parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex& parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
+    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+    Qt::ItemFlags flags(const QModelIndex& index) const override;
+    bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole) override;
+
+private:
+    uLib::ObjectsContext* m_rootContext;
+};
+
+#endif // CONTEXT_MODEL_H

app/gcompose/src/ContextPanel.cpp

@@ -0,0 +1,94 @@
+#include "ContextPanel.h"
+#include "ContextModel.h"
+#include "PropertyWidgets.h"
+#include "PropertiesPanel.h"
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QTreeView>
+#include <QSplitter>
+#include <QList>
+#include <QShortcut>
+#include <QItemSelectionModel>
+
+ContextPanel::ContextPanel(QWidget* parent) 
+    : QWidget(parent)
+    , m_context(nullptr) {
+    this->setObjectName("ContextPanel");
+    this->setAttribute(Qt::WA_StyledBackground);
+    m_layout = new QVBoxLayout(this);
+    m_layout->setContentsMargins(0, 0, 0, 0);
+    m_layout->setSpacing(0);
+
+    // Title bar setup
+    m_titleBar = new QWidget(this);
+    m_titleBar->setObjectName("PaneTitleBar");
+    m_titleBar->setFixedHeight(22);
+    
+    auto* titleLayout = new QHBoxLayout(m_titleBar);
+    titleLayout->setContentsMargins(5, 0, 5, 0);
+
+    m_titleLabel = new QLabel("Context Panel", m_titleBar);
+    m_titleLabel->setObjectName("TitleLabel");
+    titleLayout->addWidget(m_titleLabel);
+    titleLayout->addStretch();
+
+    m_layout->addWidget(m_titleBar);
+
+    m_treeView = new QTreeView(this);
+    m_treeView->setObjectName("ContextTree");
+    m_treeView->setHeaderHidden(false);
+    
+    m_model = new ContextModel(this);
+    m_treeView->setModel(m_model);
+
+    m_splitter = new QSplitter(Qt::Vertical, this);
+    m_splitter->addWidget(m_treeView);
+    
+    m_propertiesPanel = new PropertiesPanel(m_splitter);
+    m_splitter->addWidget(m_propertiesPanel);
+
+    QList<int> sizes;
+    sizes << 400 << 600;
+    m_splitter->setSizes(sizes);
+
+    m_layout->addWidget(m_splitter);
+
+    connect(m_treeView->selectionModel(), &QItemSelectionModel::selectionChanged,
+            this, &ContextPanel::onSelectionChanged);
+
+    auto* deleteShortcut = new QShortcut(QKeySequence::Delete, this);
+    connect(deleteShortcut, &QShortcut::activated, [this]() {
+        auto selectedIndexes = m_treeView->selectionModel()->selectedIndexes();
+        if (selectedIndexes.isEmpty() || !m_context) return;
+        
+        std::vector<uLib::Object*> toRemove;
+        for (const auto& idx : selectedIndexes) {
+            if (idx.column() == 0) {
+                toRemove.push_back(static_cast<uLib::Object*>(idx.internalPointer()));
+            }
+        }
+        
+        for (auto* obj : toRemove) {
+            m_context->RemoveObject(obj);
+        }
+    });
+}
+
+ContextPanel::~ContextPanel() {}
+
+void ContextPanel::setContext(uLib::ObjectsContext* context) {
+    m_context = context;
+    m_model->setContext(context);
+    m_treeView->expandAll();
+}
+
+void ContextPanel::onSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected) {
+    uLib::Object* target = nullptr;
+    if (!selected.indexes().isEmpty()) {
+        target = static_cast<uLib::Object*>(selected.indexes().first().internalPointer());
+    }
+
+    emit objectSelected(target);
+    m_propertiesPanel->setObject(target);
+}

app/gcompose/src/ContextPanel.h

@@ -0,0 +1,43 @@
+#ifndef CONTEXTPANEL_H
+#define CONTEXTPANEL_H
+
+#include <QWidget>
+#include <QItemSelection>
+#include "Core/Object.h"
+
+class QVBoxLayout;
+class QHBoxLayout;
+class QLabel;
+class QTreeView;
+class QSplitter;
+class ContextModel;
+namespace uLib { class ObjectsContext; }
+
+class ContextPanel : public QWidget {
+    Q_OBJECT
+public:
+    ContextPanel(QWidget* parent = nullptr);
+    ~ContextPanel();
+
+    void setContext(uLib::ObjectsContext* context);
+
+signals:
+    void objectSelected(uLib::Object* obj);
+
+private slots:
+    void onSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
+
+private:
+    QVBoxLayout* m_layout;
+    QWidget* m_titleBar;
+    QLabel* m_titleLabel;
+    
+    QTreeView* m_treeView;
+    ContextModel* m_model;
+    QSplitter* m_splitter;
+
+    class PropertiesPanel* m_propertiesPanel;
+    uLib::ObjectsContext* m_context;
+};
+
+#endif // CONTEXTPANEL_H

app/gcompose/src/MainPanel.cpp

@@ -0,0 +1,195 @@
+#include "MainPanel.h"
+#include "ViewportPane.h"
+#include "ContextPanel.h"
+#include "PropertiesPanel.h"
+#include "Core/ObjectFactory.h"
+#include "Core/ObjectsContext.h"
+#include "Vtk/vtkObjectsContext.h"
+#include "Vtk/vtkQViewport.h"
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QSplitter>
+#include <QLabel>
+#include <QPushButton>
+#include <QMenu>
+#include <QAction>
+#include <QApplication>
+#include "StyleManager.h"
+
+MainPanel::MainPanel(QWidget* parent) : QWidget(parent), m_context(nullptr), m_mainVtkContext(nullptr) {
+    this->setObjectName("MainPanel");
+    this->setAttribute(Qt::WA_StyledBackground);
+    auto* mainLayout = new QVBoxLayout(this);
+    mainLayout->setContentsMargins(0, 0, 0, 0);
+    mainLayout->setSpacing(0);
+
+    // 1. Top Menu Panel
+    auto* menuPanel = new QWidget(this);
+    menuPanel->setObjectName("MenuPanel");
+    menuPanel->setFixedHeight(36);
+    
+    auto* menuLayout = new QHBoxLayout(menuPanel);
+    menuLayout->setContentsMargins(10, 0, 10, 0);
+    menuLayout->setSpacing(15);
+
+    auto* logo = new QLabel("G-COMPOSE", menuPanel);
+    logo->setObjectName("LogoLabel");
+
+    // File Menu Button
+    auto* btnFile = new QPushButton("File", menuPanel);
+    btnFile->setObjectName("MenuButton");
+    auto* fileMenu = new QMenu(btnFile);
+    fileMenu->addAction("Open", this, &MainPanel::onOpen);
+    fileMenu->addAction("Save", this, &MainPanel::onSave);
+    btnFile->setMenu(fileMenu);
+
+    // Theme Menu Button
+    auto* btnTheme = new QPushButton("Theme", menuPanel);
+    btnTheme->setObjectName("MenuButton");
+    auto* themeMenu = new QMenu(btnTheme);
+    themeMenu->addAction("Dark", this, &MainPanel::onDarkTheme);
+    themeMenu->addAction("Bright", this, &MainPanel::onBrightTheme);
+    btnTheme->setMenu(themeMenu);
+
+    // New Menu Button
+    auto* btnNew = new QPushButton("New", menuPanel);
+    btnNew->setObjectName("MenuButton");
+    auto* newMenu = new QMenu(btnNew);
+    
+    auto classes = uLib::ObjectFactory::Instance().GetRegisteredClasses();
+    for (const auto& className : classes) {
+        auto* action = newMenu->addAction(QString::fromStdString(className));
+        connect(action, &QAction::triggered, [this, className]() {
+            this->onCreateObject(className);
+        });
+    }
+    btnNew->setMenu(newMenu);
+
+    menuLayout->addWidget(logo);
+    menuLayout->addWidget(btnFile);
+    menuLayout->addWidget(btnNew);
+    menuLayout->addWidget(btnTheme);
+    menuLayout->addStretch();
+
+    mainLayout->addWidget(menuPanel);
+
+    // 2. Central Splitter Area
+    m_rootSplitter = new QSplitter(Qt::Horizontal, this);
+    m_contextPanel = new ContextPanel(m_rootSplitter);
+    m_rootSplitter->addWidget(m_contextPanel);
+    m_rootSplitter->setStretchFactor(0, 0);
+
+    m_firstPane = new ViewportPane(m_rootSplitter);
+    m_rootSplitter->addWidget(m_firstPane);
+    m_rootSplitter->setStretchFactor(1, 1);
+    
+    connect(m_contextPanel, &ContextPanel::objectSelected, [this](uLib::Object* obj) {
+        if (auto* viewport = qobject_cast<uLib::Vtk::QViewport*>(m_firstPane->currentViewport())) {
+            uLib::Vtk::Puppet* puppet = nullptr;
+            if (m_mainVtkContext) {
+                puppet = m_mainVtkContext->GetPuppet(obj);
+            }
+            viewport->SelectPuppet(puppet);
+            // Update the display properties in the viewport pane itself - use the puppet proxy if possible
+            m_firstPane->setObject(puppet ? (uLib::Object*)puppet : obj);
+        } else {
+            m_firstPane->setObject(obj);
+        }
+    });
+
+    // Set initial sizes: Context(250), Viewport(600), Properties(250)
+    QList<int> sizes;
+    sizes << 250 << 600 << 250;
+    m_rootSplitter->setSizes(sizes);
+
+    mainLayout->addWidget(m_rootSplitter, 1);
+}
+
+void MainPanel::setContext(uLib::ObjectsContext* context) {
+    m_context = context;
+    m_contextPanel->setContext(context);
+
+    if (m_mainVtkContext) {
+        if (auto* viewport = qobject_cast<uLib::Vtk::QViewport*>(m_firstPane->currentViewport())) {
+            viewport->RemovePuppet(*m_mainVtkContext);
+        }
+        delete m_mainVtkContext;
+        m_mainVtkContext = nullptr;
+    }
+
+    if (context) {
+        if (auto* viewport = qobject_cast<uLib::Vtk::QViewport*>(m_firstPane->currentViewport())) {
+            m_mainVtkContext = new uLib::Vtk::vtkObjectsContext(context);
+            // viewport->AddPuppet(*m_mainVtkContext); // redundant
+
+            uLib::Object::connect(m_mainVtkContext, &uLib::Vtk::vtkObjectsContext::PuppetAdded, [this](uLib::Vtk::Puppet* p) {
+                if (p) {
+                    auto panes = this->findChildren<ViewportPane*>();
+                    for (auto* pane : panes) {
+                        if (auto* vp = qobject_cast<uLib::Vtk::QViewport*>(pane->currentViewport())) {
+                            vp->AddPuppet(*p);
+                            vp->ZoomAuto();
+                            vp->Render();
+                        }
+                    }
+                }
+            });
+
+            uLib::Object::connect(m_mainVtkContext, &uLib::Vtk::vtkObjectsContext::PuppetRemoved, [this](uLib::Vtk::Puppet* p) {
+                if (p) {
+                    auto panes = this->findChildren<ViewportPane*>();
+                    for (auto* pane : panes) {
+                        if (auto* vp = qobject_cast<uLib::Vtk::QViewport*>(pane->currentViewport())) {
+                            vp->RemovePuppet(*p);
+                            vp->Render();
+                        }
+                    }
+                }
+            });
+
+            // Add any puppets that were created during m_mainVtkContext's construction to all panes
+            auto panes = this->findChildren<ViewportPane*>();
+            for (auto* obj : context->GetObjects()) {
+                if (auto* p = m_mainVtkContext->GetPuppet(obj)) {
+                    for (auto* pane : panes) {
+                        if (auto* vp = qobject_cast<uLib::Vtk::QViewport*>(pane->currentViewport())) {
+                            vp->AddPuppet(*p);
+                        }
+                    }
+                }
+            }
+
+            uLib::Object::connect(context, &uLib::Object::Updated, [viewport]() {
+                viewport->Render();
+            });
+            viewport->ZoomAuto();
+            viewport->Render();
+        }
+    }
+}
+
+void MainPanel::onCreateObject(const std::string& className) {
+    if (!m_context) return;
+    auto* obj = uLib::ObjectFactory::Instance().Create(className);
+    if (obj) {
+        m_context->AddObject(obj);
+    }
+}
+
+void MainPanel::onOpen() {
+    // Placeholder for open logic
+}
+
+void MainPanel::onSave() {
+    // Placeholder for save logic
+}
+
+void MainPanel::onDarkTheme() {
+    StyleManager::applyStyle(qApp, "dark");
+}
+
+void MainPanel::onBrightTheme() {
+    StyleManager::applyStyle(qApp, "bright");
+}
+
+MainPanel::~MainPanel() {}

app/gcompose/src/MainPanel.h

@@ -0,0 +1,43 @@
+#ifndef MAINPANEL_H
+#define MAINPANEL_H
+
+#include <QWidget>
+
+class QSplitter;
+class ViewportPane;
+class ContextPanel;
+class PropertiesPanel;
+
+namespace uLib {
+    class ObjectsContext;
+    namespace Vtk {
+        class vtkObjectsContext;
+    }
+}
+
+class MainPanel : public QWidget {
+    Q_OBJECT
+public:
+    explicit MainPanel(QWidget* parent = nullptr);
+    virtual ~MainPanel();
+
+    void setContext(uLib::ObjectsContext* context);
+    ViewportPane* getFirstPane() const { return m_firstPane; }
+
+private slots:
+    void onOpen();
+    void onSave();
+    void onDarkTheme();
+    void onBrightTheme();
+    
+    void onCreateObject(const std::string& className);
+
+private:
+    QSplitter* m_rootSplitter;
+    ViewportPane* m_firstPane;
+    ContextPanel* m_contextPanel;
+    uLib::ObjectsContext* m_context;
+    uLib::Vtk::vtkObjectsContext* m_mainVtkContext;
+};
+
+#endif // MAINPANEL_H

app/gcompose/src/MainWindow.cpp

@@ -0,0 +1,21 @@
+#include "MainWindow.h"
+#include <QSplitter>
+#include "MainPanel.h"
+#include "Core/ObjectsContext.h"
+
+using namespace uLib;
+
+MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent) {
+    m_panel = new MainPanel(this);
+    setCentralWidget(m_panel);
+
+    setWindowTitle("gcompose - Qt VTK Interface");
+    resize(1200, 800);
+}
+
+MainWindow::~MainWindow() {
+}
+
+void MainWindow::setContext(uLib::ObjectsContext* context) {
+    m_panel->setContext(context);
+}

app/gcompose/src/MainWindow.h

@@ -0,0 +1,29 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QVTKOpenGLNativeWidget.h>
+
+class MainPanel;
+class ViewportPane;
+
+namespace uLib {
+namespace Vtk {
+}
+class ObjectsContext;
+}
+
+class MainWindow : public QMainWindow {
+    Q_OBJECT
+public:
+    MainWindow(QWidget* parent = nullptr);
+    virtual ~MainWindow();
+
+    void setContext(uLib::ObjectsContext* context);
+    MainPanel* getPanel() { return m_panel; }
+
+private:
+    MainPanel* m_panel;
+};
+
+#endif

app/gcompose/src/PropertiesPanel.cpp

@@ -0,0 +1,46 @@
+#include "PropertiesPanel.h"
+#include "PropertyWidgets.h"
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include "Core/Object.h"
+
+PropertiesPanel::PropertiesPanel(QWidget* parent) : QWidget(parent) {
+    this->setObjectName("PropertiesPanel");
+    this->setAttribute(Qt::WA_StyledBackground);
+    m_layout = new QVBoxLayout(this);
+    m_layout->setContentsMargins(0, 0, 0, 0);
+    m_layout->setSpacing(0);
+
+    // Title bar
+    m_titleBar = new QWidget(this);
+    m_titleBar->setObjectName("PaneTitleBar");
+    m_titleBar->setFixedHeight(22);
+    
+    auto* titleLayout = new QHBoxLayout(m_titleBar);
+    titleLayout->setContentsMargins(5, 0, 5, 0);
+
+    m_titleLabel = new QLabel("Properties", m_titleBar);
+    m_titleLabel->setObjectName("TitleLabel");
+    titleLayout->addWidget(m_titleLabel);
+    titleLayout->addStretch();
+
+    m_layout->addWidget(m_titleBar);
+
+    // Editor
+    m_editor = new uLib::Qt::PropertyEditor(this);
+    m_layout->addWidget(m_editor, 1);
+}
+
+void PropertiesPanel::setObject(uLib::Object* obj) {
+    if (obj) {
+        m_titleLabel->setText(QString("Properties: %1 (%2)")
+            .arg(QString::fromStdString(obj->GetInstanceName()))
+            .arg(obj->GetClassName()));
+    } else {
+        m_titleLabel->setText("Properties: (No selection)");
+    }
+    m_editor->setObject(obj);
+}
+
+PropertiesPanel::~PropertiesPanel() {}

app/gcompose/src/PropertiesPanel.h

@@ -0,0 +1,35 @@
+#ifndef PROPERTIES_PANEL_H
+#define PROPERTIES_PANEL_H
+
+#include <QWidget>
+
+namespace uLib {
+    class Object;
+    namespace Qt { class PropertyEditor; }
+}
+
+class QVBoxLayout;
+class QLabel;
+
+/**
+ * @class PropertiesPanel
+ * @brief A panel dedicated to inspecting and editing properties of a selected uLib::Object.
+ */
+class PropertiesPanel : public QWidget {
+    Q_OBJECT
+public:
+    explicit PropertiesPanel(QWidget* parent = nullptr);
+    virtual ~PropertiesPanel();
+
+    /** @brief Sets the object to be inspected. */
+    void setObject(uLib::Object* obj);
+
+private:
+    QVBoxLayout* m_layout;
+    QWidget* m_titleBar;
+    QLabel* m_titleLabel;
+    
+    uLib::Qt::PropertyEditor* m_editor;
+};
+
+#endif // PROPERTIES_PANEL_H

app/gcompose/src/PropertyWidgets.cpp

@@ -0,0 +1,173 @@
+#include "PropertyWidgets.h"
+#include <QSignalBlocker>
+#include "Vtk/uLibVtkInterface.h"
+
+namespace uLib {
+namespace Qt {
+
+PropertyWidgetBase::PropertyWidgetBase(PropertyBase* prop, QWidget* parent) 
+    : QWidget(parent), m_BaseProperty(prop) {
+    m_Layout = new QHBoxLayout(this);
+    m_Layout->setContentsMargins(4, 2, 4, 2);
+    m_Label = new QLabel(QString::fromStdString(prop->GetName()), this);
+    m_Label->setMinimumWidth(100);
+    m_Layout->addWidget(m_Label);
+}
+PropertyWidgetBase::~PropertyWidgetBase() {}
+
+DoublePropertyWidget::DoublePropertyWidget(Property<double>* prop, QWidget* parent)
+    : PropertyWidgetBase(prop, parent), m_Prop(prop) {
+    m_SpinBox = new QDoubleSpinBox(this);
+    m_SpinBox->setRange(-1000000.0, 1000000.0);
+    m_SpinBox->setValue(prop->Get());
+    m_Layout->addWidget(m_SpinBox, 1);
+    connect(m_SpinBox, static_cast<void(QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
+            [this](double val){ if (m_Prop->Get() != val) m_Prop->Set(val); });
+    uLib::Object::connect(m_Prop, &Property<double>::PropertyChanged, [this](){
+        if (m_SpinBox->value() != m_Prop->Get()) {
+            QSignalBlocker blocker(m_SpinBox);
+            m_SpinBox->setValue(m_Prop->Get());
+        }
+    });
+}
+DoublePropertyWidget::~DoublePropertyWidget() {}
+
+FloatPropertyWidget::FloatPropertyWidget(Property<float>* prop, QWidget* parent)
+    : PropertyWidgetBase(prop, parent), m_Prop(prop) {
+    m_SpinBox = new QDoubleSpinBox(this);
+    m_SpinBox->setRange(-1000000.0, 1000000.0);
+    m_SpinBox->setDecimals(3);
+    m_SpinBox->setValue(prop->Get());
+    m_Layout->addWidget(m_SpinBox, 1);
+    connect(m_SpinBox, static_cast<void(QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
+            [this](double val){ if (m_Prop->Get() != (float)val) m_Prop->Set((float)val); });
+    uLib::Object::connect(m_Prop, &Property<float>::PropertyChanged, [this](){
+        if (m_SpinBox->value() != (double)m_Prop->Get()) {
+            QSignalBlocker blocker(m_SpinBox);
+            m_SpinBox->setValue((double)m_Prop->Get());
+        }
+    });
+}
+FloatPropertyWidget::~FloatPropertyWidget() {}
+
+IntPropertyWidget::IntPropertyWidget(Property<int>* prop, QWidget* parent)
+    : PropertyWidgetBase(prop, parent), m_Prop(prop) {
+    m_SpinBox = new QSpinBox(this);
+    m_SpinBox->setRange(-1000000, 1000000);
+    m_SpinBox->setValue(prop->Get());
+    m_Layout->addWidget(m_SpinBox, 1);
+    connect(m_SpinBox, static_cast<void(QSpinBox::*)(int)>(&QSpinBox::valueChanged),
+            [this](int val){ if (m_Prop->Get() != val) m_Prop->Set(val); });
+    uLib::Object::connect(m_Prop, &Property<int>::PropertyChanged, [this](){
+        if (m_SpinBox->value() != m_Prop->Get()) {
+            QSignalBlocker blocker(m_SpinBox);
+            m_SpinBox->setValue(m_Prop->Get());
+        }
+    });
+}
+IntPropertyWidget::~IntPropertyWidget() {}
+
+BoolPropertyWidget::BoolPropertyWidget(Property<bool>* prop, QWidget* parent)
+    : PropertyWidgetBase(prop, parent), m_Prop(prop) {
+    m_CheckBox = new QCheckBox(this);
+    m_CheckBox->setChecked(prop->Get());
+    m_Layout->addWidget(m_CheckBox, 1);
+    connect(m_CheckBox, &QCheckBox::toggled, [this](bool val){ if (m_Prop->Get() != val) m_Prop->Set(val); });
+    uLib::Object::connect(m_Prop, &Property<bool>::PropertyChanged, [this](){
+        if (m_CheckBox->isChecked() != m_Prop->Get()) {
+            QSignalBlocker blocker(m_CheckBox);
+            m_CheckBox->setChecked(m_Prop->Get());
+        }
+    });
+}
+BoolPropertyWidget::~BoolPropertyWidget() {}
+
+StringPropertyWidget::StringPropertyWidget(Property<std::string>* prop, QWidget* parent)
+    : PropertyWidgetBase(prop, parent), m_Prop(prop) {
+    m_LineEdit = new QLineEdit(this);
+    m_LineEdit->setText(QString::fromStdString(prop->Get()));
+    m_Layout->addWidget(m_LineEdit, 1);
+    connect(m_LineEdit, &QLineEdit::editingFinished, [this](){ 
+        std::string val = m_LineEdit->text().toStdString();
+        if (m_Prop->Get() != val) m_Prop->Set(val); 
+    });
+    uLib::Object::connect(m_Prop, &Property<std::string>::PropertyChanged, [this](){
+        if (m_LineEdit->text().toStdString() != m_Prop->Get()) {
+            QSignalBlocker blocker(m_LineEdit);
+            m_LineEdit->setText(QString::fromStdString(m_Prop->Get()));
+        }
+    });
+}
+StringPropertyWidget::~StringPropertyWidget() {}
+
+PropertyEditor::PropertyEditor(QWidget* parent) : QWidget(parent), m_Object(nullptr) {
+    m_MainLayout = new QVBoxLayout(this);
+    m_MainLayout->setContentsMargins(0, 0, 0, 0);
+    m_ScrollArea = new QScrollArea(this);
+    m_ScrollArea->setWidgetResizable(true);
+    m_MainLayout->addWidget(m_ScrollArea);
+    m_Container = new QWidget();
+    m_ContainerLayout = new QVBoxLayout(m_Container);
+    m_ContainerLayout->setAlignment(::Qt::AlignTop);
+    m_ScrollArea->setWidget(m_Container);
+    
+    registerFactory<double>([](PropertyBase* p, QWidget* parent){
+        return new DoublePropertyWidget(static_cast<Property<double>*>(p), parent);
+    });
+    registerFactory<float>([](PropertyBase* p, QWidget* parent){
+        return new FloatPropertyWidget(static_cast<Property<float>*>(p), parent);
+    });
+    registerFactory<int>([](PropertyBase* p, QWidget* parent){
+        return new IntPropertyWidget(static_cast<Property<int>*>(p), parent);
+    });
+    registerFactory<bool>([](PropertyBase* p, QWidget* parent){
+        return new BoolPropertyWidget(static_cast<Property<bool>*>(p), parent);
+    });
+    registerFactory<std::string>([](PropertyBase* p, QWidget* parent){
+        return new StringPropertyWidget(static_cast<Property<std::string>*>(p), parent);
+    });
+}
+
+PropertyEditor::~PropertyEditor() {}
+
+void PropertyEditor::setObject(::uLib::Object* obj, bool displayOnly) {
+    m_Object = obj;
+    clear();
+    if (!obj) return;
+    
+    // Choose which properties to show
+    const std::vector<::uLib::PropertyBase*>* props = &obj->GetProperties();
+    
+    if (displayOnly) {
+        if (auto* puppet = dynamic_cast<::uLib::Vtk::Puppet*>(obj)) {
+            props = &puppet->GetDisplayProperties();
+        } else {
+            // If it's not a puppet but displayOnly is requested, showing nothing or fallback?
+            // Fallback: core properties.
+        }
+    }
+
+    for (auto* prop : *props) {
+        auto it = m_Factories.find(prop->GetTypeIndex());
+        if (it != m_Factories.end()) {
+            QWidget* widget = it->second(prop, m_Container);
+            m_ContainerLayout->addWidget(widget);
+        } else {
+            QWidget* fallback = new PropertyWidgetBase(prop, m_Container);
+            fallback->layout()->addWidget(new QLabel("(Read-only: " + QString::fromStdString(prop->GetValueAsString()) + ")"));
+            m_ContainerLayout->addWidget(fallback);
+        }
+    }
+    m_ContainerLayout->addStretch(1);
+}
+
+void PropertyEditor::clear() {
+    QLayoutItem* item;
+    while ((item = m_ContainerLayout->takeAt(0)) != nullptr) {
+        delete item->widget();
+        delete item;
+    }
+}
+
+} // namespace Qt
+} // namespace uLib

app/gcompose/src/PropertyWidgets.h

@@ -0,0 +1,110 @@
+#ifndef PROPERTY_WIDGETS_H
+#define PROPERTY_WIDGETS_H
+
+#include <QWidget>
+#include <QLabel>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QDoubleSpinBox>
+#include <QSpinBox>
+#include <QLineEdit>
+#include <QCheckBox>
+#include <QScrollArea>
+#include <map>
+#include <typeindex>
+#include <functional>
+
+#include "Core/Property.h"
+#include "Core/Object.h"
+
+namespace uLib {
+namespace Qt {
+
+class PropertyWidgetBase : public QWidget {
+    Q_OBJECT
+public:
+    PropertyWidgetBase(PropertyBase* prop, QWidget* parent = nullptr);
+    virtual ~PropertyWidgetBase();
+    PropertyBase* getProperty() const { return m_BaseProperty; }
+
+protected:
+    PropertyBase* m_BaseProperty;
+    QHBoxLayout* m_Layout;
+    QLabel* m_Label;
+};
+
+class DoublePropertyWidget : public PropertyWidgetBase {
+    Q_OBJECT
+public:
+    DoublePropertyWidget(Property<double>* prop, QWidget* parent = nullptr);
+    virtual ~DoublePropertyWidget();
+private:
+    Property<double>* m_Prop;
+    QDoubleSpinBox* m_SpinBox;
+};
+
+class FloatPropertyWidget : public PropertyWidgetBase {
+    Q_OBJECT
+public:
+    FloatPropertyWidget(Property<float>* prop, QWidget* parent = nullptr);
+    virtual ~FloatPropertyWidget();
+private:
+    Property<float>* m_Prop;
+    QDoubleSpinBox* m_SpinBox;
+};
+
+class IntPropertyWidget : public PropertyWidgetBase {
+    Q_OBJECT
+public:
+    IntPropertyWidget(Property<int>* prop, QWidget* parent = nullptr);
+    virtual ~IntPropertyWidget();
+private:
+    Property<int>* m_Prop;
+    QSpinBox* m_SpinBox;
+};
+
+class BoolPropertyWidget : public PropertyWidgetBase {
+    Q_OBJECT
+public:
+    BoolPropertyWidget(Property<bool>* prop, QWidget* parent = nullptr);
+    virtual ~BoolPropertyWidget();
+private:
+    Property<bool>* m_Prop;
+    QCheckBox* m_CheckBox;
+};
+
+class StringPropertyWidget : public PropertyWidgetBase {
+    Q_OBJECT
+public:
+    StringPropertyWidget(Property<std::string>* prop, QWidget* parent = nullptr);
+    virtual ~StringPropertyWidget();
+private:
+    Property<std::string>* m_Prop;
+    QLineEdit* m_LineEdit;
+};
+
+class PropertyEditor : public QWidget {
+    Q_OBJECT
+public:
+    PropertyEditor(QWidget* parent = nullptr);
+    virtual ~PropertyEditor();
+    void setObject(uLib::Object* obj, bool displayOnly = false);
+    template<typename T>
+    void registerFactory(std::function<QWidget*(PropertyBase*, QWidget*)> factory) {
+        m_Factories[std::type_index(typeid(T))] = factory;
+    }
+
+private:
+    void clear();
+    uLib::Object* m_Object;
+    QVBoxLayout* m_MainLayout;
+    QScrollArea* m_ScrollArea;
+    QWidget* m_Container;
+    QVBoxLayout* m_ContainerLayout;
+    std::map<std::type_index, std::function<QWidget*(PropertyBase*, QWidget*)>> m_Factories;
+};
+
+} // namespace Qt
+} // namespace uLib
+
+#endif // PROPERTY_WIDGETS_H

app/gcompose/src/QViewportPane.cpp

@@ -0,0 +1,231 @@
+#include "QViewportPane.h"
+#include <Vtk/vtkQViewport.h>
+#include <Root/QCanvas.h>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QToolButton>
+#include <QMenu>
+#include <QAction>
+#include <QSplitter>
+#include <vtkCamera.h>
+#include "PropertyWidgets.h"
+#include <QSignalBlocker>
+
+QViewportPane::QViewportPane(QWidget* parent) : QWidget(parent), m_viewport(nullptr) {
+    m_layout = new QVBoxLayout(this);
+    m_layout->setContentsMargins(0, 0, 0, 0);
+    m_layout->setSpacing(0);
+
+    // Title bar setup
+    m_titleBar = new QWidget(this);
+    m_titleBar->setObjectName("PaneTitleBar");
+    m_titleBar->setFixedHeight(22);
+    
+    auto* titleLayout = new QHBoxLayout(m_titleBar);
+    titleLayout->setContentsMargins(5, 0, 0, 0);
+
+    m_titleLabel = new QLabel("Viewport", m_titleBar);
+    m_titleLabel->setObjectName("TitleLabel");
+    
+    m_toggleBtn = new QPushButton("Display", m_titleBar);
+    m_toggleBtn->setCheckable(true);
+    m_toggleBtn->setFixedSize(60, 18);
+    m_toggleBtn->setObjectName("DisplayToggleBtn");
+
+    auto* closeBtn = new QToolButton(m_titleBar);
+    closeBtn->setObjectName("PaneCloseButton");
+    closeBtn->setText("X");
+    closeBtn->setFixedSize(18, 18);
+
+    titleLayout->addWidget(m_titleLabel);
+    titleLayout->addStretch();
+    titleLayout->addWidget(m_toggleBtn);
+    titleLayout->addSpacing(5);
+    titleLayout->addWidget(closeBtn);
+
+    m_layout->addWidget(m_titleBar);
+
+    // Main horizontal container for viewport and display panel
+    QWidget* mainArea = new QWidget(this);
+    QHBoxLayout* hLayout = new QHBoxLayout(mainArea);
+    hLayout->setContentsMargins(0, 0, 0, 0);
+    hLayout->setSpacing(0);
+    m_layout->addWidget(mainArea);
+
+    // Viewport will be added here via setViewport
+    m_viewport = new uLib::Vtk::QViewport(mainArea);
+    hLayout->addWidget(m_viewport);
+
+    // Display Panel (Overlay/Slide-out)
+    m_displayPanel = new QFrame(mainArea);
+    m_displayPanel->setObjectName("DisplayPropertiesPanel");
+    m_displayPanel->setFixedWidth(250);
+    m_displayPanel->hide();
+    
+    QVBoxLayout* panelLayout = new QVBoxLayout(m_displayPanel);
+    panelLayout->setContentsMargins(5, 5, 5, 5);
+    
+    QLabel* panelHeader = new QLabel("Display Properties", m_displayPanel);
+    panelHeader->setStyleSheet("font-weight: bold; padding: 5px;");
+    panelLayout->addWidget(panelHeader);
+
+    m_displayEditor = new uLib::Qt::PropertyEditor(m_displayPanel);
+    panelLayout->addWidget(m_displayEditor);
+    
+    hLayout->addWidget(m_displayPanel);
+
+    connect(m_toggleBtn, &QPushButton::toggled, this, &QViewportPane::toggleDisplayPanel);
+    connect(m_titleBar, &QWidget::customContextMenuRequested, this, &QViewportPane::showContextMenu);
+    connect(closeBtn, &QToolButton::clicked, this, &QViewportPane::onCloseRequested);
+
+    m_titleBar->setContextMenuPolicy(Qt::CustomContextMenu);
+}
+
+void QViewportPane::toggleDisplayPanel() {
+    m_displayPanel->setVisible(m_toggleBtn->isChecked());
+}
+
+void QViewportPane::setObject(uLib::Object* obj) {
+    m_displayEditor->setObject(obj, true);
+    // Auto-show panel if it's a puppet and we want to highlight this feature?
+    // User asked for "hiding panel", so maybe we don't auto-show.
+}
+
+void QViewportPane::setViewport(QWidget* viewport, const QString& title) {
+    if (m_viewport) {
+        m_viewport->parentWidget()->layout()->removeWidget(m_viewport);
+        delete m_viewport;
+    }
+    m_viewport = viewport;
+    m_titleLabel->setText(title);
+
+    m_viewport->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    auto* mainAreaLayout = static_cast<QHBoxLayout*>(m_displayPanel->parentWidget()->layout());
+    mainAreaLayout->insertWidget(0, m_viewport);
+}
+
+
+QViewportPane::~QViewportPane() {}
+
+void QViewportPane::setViewport(QWidget* viewport, const QString& title) {
+    if (m_viewport) {
+        m_layout->removeWidget(m_viewport);
+        delete m_viewport;
+    }
+    m_viewport = viewport;
+    m_titleLabel->setText(title);
+
+    m_viewport->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    m_layout->addWidget(m_viewport);
+}
+
+void QViewportPane::addVtkViewport() {
+    auto* viewport = new uLib::Vtk::QViewport(this);
+    setViewport(viewport, "VTK Viewport");
+}
+
+void QViewportPane::addRootCanvas() {
+    auto* canvas = new uLib::Root::QCanvas(this);
+    setViewport(canvas, "ROOT Canvas");
+}
+
+void QViewportPane::onCloseRequested() {
+    QSplitter* parentSplitter = qobject_cast<QSplitter*>(parentWidget());
+    if (parentSplitter && parentSplitter->count() > 1) {
+        deleteLater();
+    } else {
+        // Can't close the last viewport in the splitter safely. Re-initialize to default VTK canvas.
+        addVtkViewport();
+    }
+}
+
+void QViewportPane::showContextMenu(const QPoint& pos) {
+    QMenu menu(this);
+    QAction* hSplit = menu.addAction("H split");
+    QAction* vSplit = menu.addAction("V split");
+    menu.addSeparator();
+    
+    bool isVtk = (qobject_cast<uLib::Vtk::QViewport*>(m_viewport) != nullptr);
+
+    QAction* changeType = menu.addAction(isVtk ? "Change to ROOT Canvas" : "Change to VTK Viewport");
+
+    QAction* selected = menu.exec(m_titleBar->mapToGlobal(pos));
+    
+    if (selected == hSplit) {
+        AttemptSplit(Qt::Horizontal);
+    } else if (selected == vSplit) {
+        AttemptSplit(Qt::Vertical);
+    } else if (selected == changeType) {
+        if (isVtk) {
+            addRootCanvas();
+        } else {
+            addVtkViewport();
+        }
+    }
+}
+
+void QViewportPane::AttemptSplit(Qt::Orientation orientation) {
+    QWidget* p = parentWidget();
+    if (!p) return;
+
+    QSplitter* parentSplitter = qobject_cast<QSplitter*>(p);
+    if (!parentSplitter) return;
+
+    QViewportPane* newPane = new QViewportPane();
+
+    // 1. Synchronize viewport content and camera (VTK Viewport only for now)
+    auto* currentVtk = qobject_cast<uLib::Vtk::QViewport*>(m_viewport);
+    if (currentVtk) {
+        auto* newVtk = qobject_cast<uLib::Vtk::QViewport*>(newPane->currentViewport());
+        if (newVtk) {
+            // Copy puppets
+            for (auto* puppet : currentVtk->getPuppets()) {
+                newVtk->AddPuppet(*puppet);
+            }
+            // Copy camera
+            if (currentVtk->GetRenderer() && newVtk->GetRenderer()) {
+                vtkCamera* currentCam = currentVtk->GetRenderer()->GetActiveCamera();
+                vtkCamera* newCam = newVtk->GetRenderer()->GetActiveCamera();
+                if (currentCam && newCam) {
+                    newCam->DeepCopy(currentCam);
+                }
+            }
+            // Sync grid visible and axis
+            newVtk->SetGridVisible(currentVtk->GetGridVisible());
+            newVtk->SetGridAxis(currentVtk->GetGridAxis());
+        }
+    }
+
+    // 2. Adjust for ROOT Canvas if that was the active view
+    bool isRoot = (qobject_cast<uLib::Root::QCanvas*>(m_viewport) != nullptr);
+    if (isRoot) {
+        newPane->addRootCanvas();
+    }
+
+    if (parentSplitter->orientation() == orientation) {
+        int index = parentSplitter->indexOf(this);
+        QList<int> sizes = parentSplitter->sizes();
+        int currentSize = sizes.value(index, 0);
+        int half = currentSize / 2;
+        sizes[index] = half;
+        sizes.insert(index + 1, currentSize - half);
+        
+        parentSplitter->insertWidget(index + 1, newPane);
+        parentSplitter->setSizes(sizes);
+    } else {
+        int index = parentSplitter->indexOf(this);
+        QList<int> parentSizes = parentSplitter->sizes();
+        
+        QSplitter* newSplitter = new QSplitter(orientation);
+        newSplitter->addWidget(this);
+        newSplitter->addWidget(newPane);
+        
+        QList<int> subSizes;
+        subSizes << 500 << 500;
+        newSplitter->setSizes(subSizes);
+        
+        parentSplitter->insertWidget(index, newSplitter);
+        parentSplitter->setSizes(parentSizes);
+    }
+}

app/gcompose/src/QViewportPane.h

@@ -0,0 +1,50 @@
+#ifndef QVIEWPORTPANE_H
+#define QVIEWPORTPANE_H
+
+#include <QWidget>
+#include <QFrame>
+#include <QPushButton>
+
+namespace uLib {
+    class Object;
+    namespace Qt { class PropertyEditor; }
+}
+
+class QVBoxLayout;
+class QLabel;
+
+class QViewportPane : public QWidget {
+    Q_OBJECT
+public:
+    explicit QViewportPane(QWidget* parent = nullptr);
+    virtual ~QViewportPane();
+
+    void addVtkViewport();
+    void addRootCanvas();
+
+    QWidget* currentViewport() const { return m_viewport; }
+    
+    /** @brief Update the display properties for the given object. */
+    void setObject(uLib::Object* obj);
+
+private slots:
+    void onCloseRequested();
+    void showContextMenu(const QPoint& pos);
+    void toggleDisplayPanel();
+
+private:
+    void AttemptSplit(Qt::Orientation orientation);
+    void setViewport(QWidget* viewport, const QString& title);
+
+    QVBoxLayout* m_layout;
+    QWidget* m_titleBar;
+    QLabel* m_titleLabel;
+    QWidget* m_viewport;
+
+    // Display Properties Overlay
+    QFrame* m_displayPanel;
+    uLib::Qt::PropertyEditor* m_displayEditor;
+    QPushButton* m_toggleBtn;
+};
+
+#endif // QVIEWPORTPANE_H

app/gcompose/src/StyleManager.cpp

@@ -0,0 +1,98 @@
+#include "StyleManager.h"
+#include <QApplication>
+
+static const QString DARK_THEME = R"(
+QWidget#MenuPanel { background-color: #2b2b2b; border-bottom: 1px solid #111; }
+QLabel#LogoLabel { font-weight: bold; color: #0078d7; font-size: 14px; letter-spacing: 1px; }
+QPushButton#MenuButton { background: transparent; color: #ccc; border: none; padding: 5px 10px; }
+QPushButton#MenuButton:hover { background: #3c3c3c; color: white; border-radius: 4px; }
+QWidget#PaneTitleBar { background-color: #333; color: white; border-bottom: 2px solid #222; }
+QLabel#TitleLabel { font-weight: bold; margin-left: 2px; }
+QToolButton#PaneCloseButton { border: none; font-weight: bold; background: transparent; color: #ccc; }
+QToolButton#PaneCloseButton:hover { color: white; background: #c42b1c; }
+
+/* Global & Panel Backgrounds */
+QMainWindow, QWidget#MainPanel { background-color: #1e1e1e; }
+QWidget#DisplayPropertiesPanel, QWidget#PropertiesPanel, QWidget#ContextPanel { background-color: #252526; border-left: 1px solid #3e3e42; }
+QPushButton#DisplayToggleBtn { background-color: #333337; border: 1px solid #3e3e42; border-radius: 2px; color: #f1f1f1; font-size: 11px; }
+QPushButton#DisplayToggleBtn:checked { background-color: #0078d7; color: white; border-color: #005a9e; font-weight: bold; }
+QPushButton#DisplayToggleBtn:hover { border-color: #0078d7; }
+
+QScrollArea { border: none; background: transparent; }
+QScrollArea > QWidget > QWidget { background: transparent; }
+
+/* Property Widgets Styling */
+QLabel { color: #cccccc; }
+QDoubleSpinBox, QSpinBox, QLineEdit { background: #3c3c3c; color: #f1f1f1; border: 1px solid #3e3e42; padding: 2px 4px; border-radius: 2px; selection-background-color: #0078d7; }
+QDoubleSpinBox:focus, QSpinBox:focus, QLineEdit:focus { border-color: #0078d7; }
+QCheckBox { color: #cccccc; spacing: 5px; }
+QCheckBox::indicator { width: 14px; height: 14px; border: 1px solid #3e3e42; background: #333337; border-radius: 2px; }
+QCheckBox::indicator:checked { background: #0078d7; border-color: #005a9e; }
+QCheckBox::indicator:hover { border-color: #0078d7; }
+
+QMenu { background-color: #2b2b2b; color: white; border: 1px solid #111; }
+QMenu::item:selected { background-color: #3c3c3c; }
+QTreeView#ContextTree { background-color: #1e1e1e; color: #ccc; border: none; }
+QTreeView#ContextTree::item:hover { background-color: #2a2d2e; }
+QTreeView#ContextTree::item:selected { background-color: #094771; color: white; }
+QHeaderView::section { background-color: #252526; color: #ccc; border: 1px solid #323233; padding: 4px; }
+
+/* ScrollBars */
+QScrollBar:vertical { background: #1e1e1e; width: 12px; margin: 0px; }
+QScrollBar::handle:vertical { background: #3e3e42; min-height: 20px; border-radius: 6px; margin: 2px; }
+QScrollBar::handle:vertical:hover { background: #505050; }
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0px; }
+)";
+
+static const QString BRIGHT_THEME = R"(
+QWidget#MenuPanel { background-color: #f3f3f3; border-bottom: 1px solid #ccc; }
+QLabel#LogoLabel { font-weight: bold; color: #005a9e; font-size: 14px; letter-spacing: 1px; }
+QPushButton#MenuButton { background: transparent; color: #333; border: none; padding: 5px 10px; }
+QPushButton#MenuButton:hover { background: #e5e5e5; color: black; border-radius: 4px; }
+QWidget#PaneTitleBar { background-color: #eeeeee; color: black; border-bottom: 2px solid #ddd; }
+QLabel#TitleLabel { font-weight: bold; margin-left: 2px; }
+QToolButton#PaneCloseButton { border: none; font-weight: bold; background: transparent; color: #666; }
+QToolButton#PaneCloseButton:hover { color: white; background: #e81123; }
+
+/* Global & Panel Backgrounds */
+QMainWindow, QWidget#MainPanel { background-color: #f3f3f3; }
+QWidget#DisplayPropertiesPanel, QWidget#PropertiesPanel, QWidget#ContextPanel { background-color: #ffffff; border-left: 1px solid #cccccc; }
+QPushButton#DisplayToggleBtn { background-color: #ffffff; border: 1px solid #cccccc; border-radius: 2px; color: #333; font-size: 11px; }
+QPushButton#DisplayToggleBtn:checked { background-color: #0078d7; color: white; border-color: #005a9e; font-weight: bold; }
+QPushButton#DisplayToggleBtn:hover { border-color: #0078d7; }
+
+QScrollArea { border: none; background: transparent; }
+QScrollArea > QWidget > QWidget { background: transparent; }
+
+/* Property Widgets Styling */
+QLabel { color: #333333; }
+QDoubleSpinBox, QSpinBox, QLineEdit { background: #ffffff; color: #333333; border: 1px solid #cccccc; padding: 2px 4px; border-radius: 2px; selection-background-color: #0078d7; }
+QDoubleSpinBox:focus, QSpinBox:focus, QLineEdit:focus { border-color: #0078d7; }
+QCheckBox { color: #333333; spacing: 5px; }
+QCheckBox::indicator { width: 14px; height: 14px; border: 1px solid #cccccc; background: #ffffff; border-radius: 2px; }
+QCheckBox::indicator:checked { background: #0078d7; border-color: #005a9e; }
+QCheckBox::indicator:hover { border-color: #0078d7; }
+
+QMenu { background-color: #f3f3f3; color: black; border: 1px solid #ccc; }
+QMenu::item:selected { background-color: #d0d0d0; }
+QTreeView#ContextTree { background-color: #ffffff; color: #333; border: none; }
+QTreeView#ContextTree::item:hover { background-color: #f2f2f2; }
+QTreeView#ContextTree::item:selected { background-color: #0078d7; color: white; }
+QHeaderView::section { background-color: #f3f3f3; color: #333; border: 1px solid #ccc; padding: 4px; }
+
+/* ScrollBars */
+QScrollBar:vertical { background: #ffffff; width: 12px; margin: 0px; }
+QScrollBar::handle:vertical { background: #cccccc; min-height: 20px; border-radius: 6px; margin: 2px; }
+QScrollBar::handle:vertical:hover { background: #aaaaaa; }
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0px; }
+)";
+
+void StyleManager::applyStyle(QApplication* app, const QString& themeName) {
+    if (!app) return;
+    
+    if (themeName == "bright") {
+        app->setStyleSheet(BRIGHT_THEME);
+    } else {
+        app->setStyleSheet(DARK_THEME); // default
+    }
+}

app/gcompose/src/StyleManager.h

@@ -0,0 +1,13 @@
+#ifndef STYLEMANAGER_H
+#define STYLEMANAGER_H
+
+#include <QString>
+
+class QApplication;
+
+class StyleManager {
+public:
+    static void applyStyle(QApplication* app, const QString& themeName);
+};
+
+#endif // STYLEMANAGER_H

app/gcompose/src/ViewportPane.cpp

@@ -0,0 +1,180 @@
+#include "ViewportPane.h"
+#include <Vtk/vtkQViewport.h>
+#include <Root/QCanvas.h>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QToolButton>
+#include <QMenu>
+#include <QAction>
+#include <QSplitter>
+#include <vtkCamera.h>
+#include "PropertyWidgets.h"
+#include <QSignalBlocker>
+
+ViewportPane::ViewportPane(QWidget* parent) : QWidget(parent), m_viewport(nullptr) {
+    m_layout = new QVBoxLayout(this);
+    m_layout->setContentsMargins(0, 0, 0, 0);
+    m_layout->setSpacing(0);
+
+    // Title bar setup
+    m_titleBar = new QWidget(this);
+    m_titleBar->setObjectName("PaneTitleBar");
+    m_titleBar->setFixedHeight(22);
+    
+    auto* titleLayout = new QHBoxLayout(m_titleBar);
+    titleLayout->setContentsMargins(5, 0, 0, 0);
+
+    m_titleLabel = new QLabel("Viewport", m_titleBar);
+    m_titleLabel->setObjectName("TitleLabel");
+    
+    m_toggleBtn = new QPushButton("Display", m_titleBar);
+    m_toggleBtn->setCheckable(true);
+    m_toggleBtn->setFixedSize(60, 18);
+    m_toggleBtn->setObjectName("DisplayToggleBtn");
+
+    auto* closeBtn = new QToolButton(m_titleBar);
+    closeBtn->setObjectName("PaneCloseButton");
+    closeBtn->setText("X");
+    closeBtn->setFixedSize(18, 18);
+
+    titleLayout->addWidget(m_titleLabel);
+    titleLayout->addStretch();
+    titleLayout->addWidget(m_toggleBtn);
+    titleLayout->addSpacing(5);
+    titleLayout->addWidget(closeBtn);
+
+    m_layout->addWidget(m_titleBar);
+
+    // Main horizontal container for viewport and display panel
+    QWidget* mainArea = new QWidget(this);
+    QHBoxLayout* hLayout = new QHBoxLayout(mainArea);
+    hLayout->setContentsMargins(0, 0, 0, 0);
+    hLayout->setSpacing(0);
+    m_layout->addWidget(mainArea);
+
+    // Viewport will be added here via setViewport
+    m_viewport = new uLib::Vtk::QViewport(mainArea);
+    hLayout->addWidget(m_viewport);
+
+    // Display Panel (Overlay/Slide-out)
+    m_displayPanel = new QFrame(mainArea);
+    m_displayPanel->setObjectName("DisplayPropertiesPanel");
+    m_displayPanel->setFixedWidth(250);
+    m_displayPanel->hide();
+    
+    QVBoxLayout* panelLayout = new QVBoxLayout(m_displayPanel);
+    panelLayout->setContentsMargins(5, 5, 5, 5);
+    
+    QLabel* panelHeader = new QLabel("Display Properties", m_displayPanel);
+    panelHeader->setStyleSheet("font-weight: bold; padding: 5px;");
+    panelLayout->addWidget(panelHeader);
+
+    m_displayEditor = new uLib::Qt::PropertyEditor(m_displayPanel);
+    panelLayout->addWidget(m_displayEditor);
+    
+    hLayout->addWidget(m_displayPanel);
+
+    connect(m_toggleBtn, &QPushButton::toggled, this, &ViewportPane::toggleDisplayPanel);
+    connect(m_titleBar, &QWidget::customContextMenuRequested, this, &ViewportPane::showContextMenu);
+    connect(closeBtn, &QToolButton::clicked, this, &ViewportPane::onCloseRequested);
+
+    m_titleBar->setContextMenuPolicy(Qt::CustomContextMenu);
+}
+
+ViewportPane::~ViewportPane() {}
+
+void ViewportPane::toggleDisplayPanel() {
+    m_displayPanel->setVisible(m_toggleBtn->isChecked());
+}
+
+void ViewportPane::setObject(uLib::Object* obj) {
+    m_displayEditor->setObject(obj, true);
+    
+    // Check if the object is a Puppet (meaning it has display properties)
+    bool isPuppet = (dynamic_cast<::uLib::Vtk::Puppet*>(obj) != nullptr);
+    
+    // Only show the "Display" toggle button if it's a puppet
+    m_toggleBtn->setVisible(isPuppet);
+    
+    // If it's a puppet, we might want to keep the panel state if it was already open,
+    // or if it's NOT a puppet, definitely hide the toggle and panel.
+    if (!isPuppet) {
+        m_toggleBtn->setChecked(false);
+        m_displayPanel->hide();
+    }
+}
+
+void ViewportPane::setViewport(QWidget* viewport, const QString& title) {
+    if (m_viewport) {
+        m_viewport->parentWidget()->layout()->removeWidget(m_viewport);
+        delete m_viewport;
+    }
+    m_viewport = viewport;
+    m_titleLabel->setText(title);
+
+    m_viewport->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    auto* mainAreaLayout = static_cast<QHBoxLayout*>(m_displayPanel->parentWidget()->layout());
+    mainAreaLayout->insertWidget(0, m_viewport);
+}
+
+void ViewportPane::addVtkViewport() {
+    auto* viewport = new uLib::Vtk::QViewport(this);
+    setViewport(viewport, "VTK Viewport");
+}
+
+void ViewportPane::addRootCanvas() {
+    auto* canvas = new uLib::Root::QCanvas(this);
+    setViewport(canvas, "ROOT Canvas");
+}
+
+void ViewportPane::onCloseRequested() {
+    QSplitter* parentSplitter = qobject_cast<QSplitter*>(parentWidget());
+    if (parentSplitter && parentSplitter->count() > 1) {
+        deleteLater();
+    } else {
+        addVtkViewport();
+    }
+}
+
+void ViewportPane::showContextMenu(const QPoint& pos) {
+    QMenu menu(this);
+    QAction* hSplit = menu.addAction("H split");
+    QAction* vSplit = menu.addAction("V split");
+    menu.addSeparator();
+    bool isVtk = (qobject_cast<uLib::Vtk::QViewport*>(m_viewport) != nullptr);
+    QAction* changeType = menu.addAction(isVtk ? "Change to ROOT Canvas" : "Change to VTK Viewport");
+    QAction* selected = menu.exec(m_titleBar->mapToGlobal(pos));
+    if (selected == hSplit) AttemptSplit(Qt::Horizontal);
+    else if (selected == vSplit) AttemptSplit(Qt::Vertical);
+    else if (selected == changeType) isVtk ? addRootCanvas() : addVtkViewport();
+}
+
+void ViewportPane::AttemptSplit(Qt::Orientation orientation) {
+    QWidget* p = parentWidget();
+    if (!p) return;
+    QSplitter* parentSplitter = qobject_cast<QSplitter*>(p);
+    if (!parentSplitter) return;
+    ViewportPane* newPane = new ViewportPane();
+    if (parentSplitter->orientation() == orientation) {
+        int index = parentSplitter->indexOf(this);
+        QList<int> sizes = parentSplitter->sizes();
+        int currentSize = sizes.value(index, 0);
+        int half = currentSize / 2;
+        sizes[index] = half;
+        sizes.insert(index + 1, currentSize - half);
+        parentSplitter->insertWidget(index + 1, newPane);
+        parentSplitter->setSizes(sizes);
+    } else {
+        int index = parentSplitter->indexOf(this);
+        QList<int> parentSizes = parentSplitter->sizes();
+        QSplitter* newSplitter = new QSplitter(orientation);
+        newSplitter->addWidget(this);
+        newSplitter->addWidget(newPane);
+        QList<int> subSizes;
+        subSizes << 500 << 500;
+        newSplitter->setSizes(subSizes);
+        parentSplitter->insertWidget(index, newSplitter);
+        parentSplitter->setSizes(parentSizes);
+    }
+}

app/gcompose/src/ViewportPane.h

@@ -0,0 +1,50 @@
+#ifndef VIEWPORTPANE_H
+#define VIEWPORTPANE_H
+
+#include <QWidget>
+#include <QFrame>
+#include <QPushButton>
+
+namespace uLib {
+    class Object;
+    namespace Qt { class PropertyEditor; }
+}
+
+class QVBoxLayout;
+class QLabel;
+
+class ViewportPane : public QWidget {
+    Q_OBJECT
+public:
+    explicit ViewportPane(QWidget* parent = nullptr);
+    virtual ~ViewportPane();
+
+    void addVtkViewport();
+    void addRootCanvas();
+
+    QWidget* currentViewport() const { return m_viewport; }
+    
+    /** @brief Update the display properties for the given object. */
+    void setObject(uLib::Object* obj);
+
+private slots:
+    void onCloseRequested();
+    void showContextMenu(const QPoint& pos);
+    void toggleDisplayPanel();
+
+private:
+    void AttemptSplit(Qt::Orientation orientation);
+    void setViewport(QWidget* viewport, const QString& title);
+
+    QVBoxLayout* m_layout;
+    QWidget* m_titleBar;
+    QLabel* m_titleLabel;
+    QWidget* m_viewport;
+
+    // Display Properties Overlay
+    QFrame* m_displayPanel;
+    uLib::Qt::PropertyEditor* m_displayEditor;
+    QPushButton* m_toggleBtn;
+};
+
+#endif // VIEWPORTPANE_H

app/gcompose/src/main.cpp

@@ -0,0 +1,55 @@
+#include <QApplication>
+#include "MainWindow.h"
+#include "MainPanel.h"
+#include "ViewportPane.h"
+#include "StyleManager.h"
+
+#include "Math/ContainerBox.h"
+#include <HEP/Geant/Scene.h>
+#include "HEP/Detectors/DetectorChamber.h"
+#include "Vtk/HEP/Detectors/vtkDetectorChamber.h"
+
+#include <Vtk/vtkContainerBox.h>
+#include <Vtk/vtkQViewport.h>
+
+#include "Core/ObjectsContext.h"
+
+#include <vtkSmartPointer.h>
+#include <vtkCubeSource.h>
+#include <vtkPolyDataMapper.h>
+#include <vtkActor.h>
+#include <vtkRenderer.h>
+
+
+#include "Math/Units.h"
+#include <iostream>
+
+using namespace uLib;
+using namespace uLib::literals;
+
+int main(int argc, char** argv) {
+    QApplication app(argc, argv);
+    StyleManager::applyStyle(&app, "dark");
+    std::cout << "Starting gcompose Qt application..." << std::endl;
+
+    // ContainerBox world_box(Vector3f(1, 1, 1));
+    // world_box.Scale(Vector3f(2_mm, 2_mm, 2_mm));
+    // world_box.SetPosition(Vector3f(-1_mm, -1_mm, -1_mm));    
+
+    // Geant::Scene scene;
+    // scene.ConstructWorldBox(world_box.GetSize(), "G4_AIR");
+    // scene.Initialize();
+
+    uLib::ObjectsContext globalContext;
+    // globalContext.AddObject(&world_box);
+    // globalContext.AddObject(&scene);
+
+    // 2. Initialize MainWindow (contains embedded VTK QViewport)
+    MainWindow window;
+    window.setContext(&globalContext);
+    
+    std::cout << "Geant4 and VTK scenes are ready." << std::endl;
+    
+    window.show();
+    return app.exec();
+}

conanfile.txt

@@ -1,8 +1,13 @@
 [requires]
 eigen/3.4.0
 boost/1.83.0
-pybind11/3.0.2
+# pybind11/3.0.2
+hdf5/1.14.3
 
 [generators]
 CMakeDeps
 CMakeToolchain
+
+[options]
+hdf5/*:threadsafe=True
+hdf5/*:enable_unsupported=True

src/Core/Archives.h

@@ -198,20 +198,16 @@ public:
     return &bpos;
   }
 
-  template <class T> Archive &operator<<(T &t) {
+  template <class T> Archive &operator<<(const T &t) {
     // to get access you must redefine save_override by typing
     // "using save_override" in archive impl
     this->This()->save_override(t);
     return *this->This();
   }
-
+ 
   // the & operator
-  template <class T> Archive &operator&(T &t) {
-#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
-    return *this->This() << const_cast<const T &>(t);
-#else
+  template <class T> Archive &operator&(const T &t) {
     return *this->This() << t;
-#endif
   }
 
   // the == operator
@@ -364,7 +360,6 @@ public:
       boost::serialization::hrp<T> &t) {
     this->This()->load_start(t.name());
     this->detail_common_iarchive::load_override(t.value());
-    //        t.stov();
     this->This()->load_end(t.name());
   }
 
@@ -432,8 +427,7 @@ public:
 #endif
       ::boost::serialization::hrp<T> &t) {
     this->This()->save_start(t.name());
-    //        t.vtos();
-    //        this->detail_common_oarchive::save_override(t.const_value());
+    this->detail_common_oarchive::save_override(t.const_value());
     this->This()->save_end(t.name());
   }
 
@@ -467,14 +461,10 @@ public:
   text_iarchive(std::istream &is, unsigned int flags = 0)
       : text_iarchive_impl<Archive>(is, flags) {}
 
-  using basic_text_iarchive::load_override;
+  using base::load_override;
 
   void load_override(boost::archive::object_id_type &t) {}
 
-  // class_name_type can't be handled here as it depends upon the
-  // char type used by the stream.  So require the derived implementation.
-  // derived in this case is xml_iarchive_impl or base ..
-  using base::load_override;
 
   void load_override(const char *str) {
     StringReader sr(basic_text_iprimitive::is);
@@ -532,7 +522,7 @@ public:
   hrt_iarchive(std::istream &is, unsigned int flags = 0)
       : base(is, flags | boost::archive::no_header) {}
 
-  using basic_text_iarchive::load_override;
+  using base::load_override;
 
   // hide all archive props //
   void load_override(boost::archive::object_id_type &t) {}
@@ -544,10 +534,6 @@ public:
   void load_override(boost::archive::class_name_type &t) {}
   void load_override(boost::archive::tracking_type &t) {}
 
-  // class_name_type can't be handled here as it depends upon the
-  // char type used by the stream.  So require the derived implementation.
-  // derived in this case is xml_iarchive_impl or base ..
-  using base::load_override;
 
   void load_override(const char *str) {
     StringReader sr(basic_text_iprimitive::is);
@@ -583,6 +569,13 @@ public:
 
   void save_override(const char *str) { basic_text_oprimitive::save(str); }
 
+  template <class T>
+  void save_override(const boost::serialization::hrp<T> &t) {
+    *this << t.name() << ": ";
+    *this << t.const_value();
+    *this << "\n";
+  }
+
   ~hrt_oarchive() {}
 };
 
@@ -611,7 +604,7 @@ public:
     //        basic_text_oprimitive::save(str);
   }
 
-  template <class T> void save_override(T &t) {
+  template <class T> void save_override(const T &t) {
     base::save_override(boost::serialization::make_nvp(NULL, t));
   }
 
@@ -627,6 +620,10 @@ public:
     base::save_override(t);
   }
 
+  template <class T> void save_override(const boost::serialization::hrp<T> &t) {
+    base::save_override(boost::serialization::make_nvp(t.name(), t.const_value()));
+  }
+
   // specific overrides for attributes - not name value pairs so we
   // want to trap them before the above "fall through"
   // since we don't want to see these in the output - make them no-ops.

src/Core/CMakeLists.txt

@@ -10,6 +10,8 @@ set(HEADERS
     Macros.h 
     Mpl.h 
     Object.h 
+    ObjectFactory.h
+    ObjectsContext.h
     Options.h 
     Serializable.h 
     Signal.h 
@@ -26,6 +28,8 @@ set(SOURCES
     Archives.cpp 
     Debug.cpp 
     Object.cpp 
+    ObjectFactory.cpp
+    ObjectsContext.cpp
     Options.cpp 
     Serializable.cpp 
     Signal.cpp 
@@ -49,7 +53,7 @@ endif()
 target_link_libraries(${libname} ${LIBRARIES})
 
 install(TARGETS ${libname}
-        EXPORT "${PROJECT_NAME}Targets"
+        EXPORT "uLibTargets"
         RUNTIME DESTINATION ${INSTALL_BIN_DIR} COMPONENT bin
         LIBRARY DESTINATION ${INSTALL_LIB_DIR} COMPONENT lib)
 

src/Core/Debug.h

@@ -36,7 +36,7 @@
 #include "SmartPointer.h"
 
 #include <boost/any.hpp>
-#include <TObject.h>
+
 
 namespace uLib {
 
@@ -119,8 +119,8 @@ public:
     void AddAdapter(AdapterInterface &ad) { m_a.push_back(Adapter(ad)); }
 
     void Update() {
-        foreach(Adapter &ad, m_a) {
-            foreach(DItem &item, m_v) {
+        for(Adapter &ad : m_a) {
+            for(DItem &item : m_v) {
                 item.m_adapter->operator()(ad, item.m_value);
             }
         }

src/Core/Object.cpp

@@ -35,6 +35,9 @@
 #include "boost/archive/polymorphic_xml_iarchive.hpp"
 #include "boost/archive/polymorphic_xml_oarchive.hpp"
 
+#include <vector>
+#include "Property.h"
+
 namespace uLib {
 
 const char *Version::PackageName = PACKAGE_NAME;
@@ -56,11 +59,55 @@ public:
     GenericMFPtr sloptr;
     std::string slostr;
   };
-
+  
+  std::string m_InstanceName;
   Vector<Signal> sigv;
   Vector<Slot> slov;
+  std::vector<PropertyBase*> m_Properties;
+  std::vector<PropertyBase*> m_DynamicProperties;
 };
 
+// Implementations of Property methods
+void Object::RegisterProperty(PropertyBase* prop) {
+    if (prop) d->m_Properties.push_back(prop);
+}
+
+void Object::RegisterDynamicProperty(PropertyBase* prop) {
+    if (prop) {
+        d->m_DynamicProperties.push_back(prop);
+        d->m_Properties.push_back(prop);
+    }
+}
+
+const std::vector<PropertyBase*>& Object::GetProperties() const {
+    return d->m_Properties;
+}
+
+// In Object.h, the template serialize needs to be updated to call property serialization.
+// However, since Object::serialize is a template in the header, we might need a helper here.
+
+template <class ArchiveT>
+void Object::serialize(ArchiveT &ar, const unsigned int version) {
+    ar & boost::serialization::make_nvp("InstanceName", d->m_InstanceName);
+    for (auto* prop : d->m_Properties) {
+        prop->serialize(ar, version);
+    }
+}
+
+void Object::Updated() { ULIB_SIGNAL_EMIT(Object::Updated); }
+
+template <class ArchiveT>
+void Object::save_override(ArchiveT &ar, const unsigned int version) {}
+
+// Explicitly instantiate for all uLib archives
+template void Object::serialize(Archive::xml_oarchive &, const unsigned int);
+template void Object::serialize(Archive::xml_iarchive &, const unsigned int);
+template void Object::serialize(Archive::text_oarchive &, const unsigned int);
+template void Object::serialize(Archive::text_iarchive &, const unsigned int);
+template void Object::serialize(Archive::hrt_oarchive &, const unsigned int);
+template void Object::serialize(Archive::hrt_iarchive &, const unsigned int);
+template void Object::serialize(Archive::log_archive &, const unsigned int);
+
 ////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////
@@ -70,7 +117,12 @@ Object::Object() : d(new ObjectPrivate) {}
 
 Object::Object(const Object &copy) : d(new ObjectPrivate(*copy.d)) {}
 
-Object::~Object() { delete d; }
+Object::~Object() {
+    for (auto* p : d->m_DynamicProperties) {
+        delete p;
+    }
+    delete d;
+}
 
 void Object::DeepCopy(const Object &copy) {
   // should lock to be tread safe //
@@ -145,6 +197,15 @@ GenericMFPtr *Object::findSlotImpl(const char *name) const {
   return NULL;
 }
 
+const std::string& Object::GetInstanceName() const {
+  return d->m_InstanceName;
+}
+
+void Object::SetInstanceName(const std::string& name) {
+  d->m_InstanceName = name;
+  this->Updated();
+}
+
 // std::ostream &
 // operator << (std::ostream &os, uLib::Object &ob)
 // {

src/Core/Object.h

@@ -27,6 +27,7 @@
 #define U_CORE_OBJECT_H
 
 #include <iostream>
+#include <string>
 
 // WARNING: COPILE ERROR if this goes after mpl/vector //
 // #include "Core/Vector.h"
@@ -50,6 +51,8 @@ class polymorphic_oarchive;
 
 namespace uLib {
 
+class PropertyBase;
+
 class Version {
 public:
   static const char *PackageName;
@@ -74,6 +77,17 @@ public:
   Object(const Object &copy);
   ~Object();
 
+  virtual const char * GetClassName() const { return "Object"; }
+
+  const std::string& GetInstanceName() const;
+  void SetInstanceName(const std::string& name);
+
+  ////////////////////////////////////////////////////////////////////////////
+  // PROPERTIES //
+  void RegisterProperty(PropertyBase* prop);
+  void RegisterDynamicProperty(PropertyBase* prop);
+  const std::vector<PropertyBase*>& GetProperties() const;
+
   ////////////////////////////////////////////////////////////////////////////
   // PARAMETERS //
 
@@ -84,9 +98,18 @@ public:
   // SERIALIZATION //
 
   template <class ArchiveT>
-  void serialize(ArchiveT &ar, const unsigned int version) {}
+  void serialize(ArchiveT &ar, const unsigned int version);
+
+  virtual void serialize(Archive::xml_oarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::xml_iarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::text_oarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::text_iarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::hrt_oarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::hrt_iarchive & ar, const unsigned int version) {}
+  virtual void serialize(Archive::log_archive & ar, const unsigned int version) {}
+
   template <class ArchiveT>
-  void save_override(ArchiveT &ar, const unsigned int version) {}
+  void save_override(ArchiveT &ar, const unsigned int version);
 
   void SaveConfig(std::ostream &os, int version = 0);
   void LoadConfig(std::istream &is, int version = 0);
@@ -97,6 +120,9 @@ public:
   ////////////////////////////////////////////////////////////////////////////
   // SIGNALS //
 
+  signals:
+  virtual void Updated();
+
   // Qt4 style connector //
   static bool connect(const Object *ob1, const char *signal_name,
                       const Object *receiver, const char *slot_name) {
@@ -121,6 +147,25 @@ public:
     return true;
   }
 
+  // Lambda/Function object connector //
+  template <typename Func1, typename SlotT>
+  static bool connect(typename FunctionPointer<Func1>::Object *sender,
+                      Func1 sigf, SlotT slof) {
+    SignalBase *sigb = sender->findOrAddSignal(sigf);
+    typedef typename FunctionPointer<Func1>::SignalSignature SigSignature;
+    typedef typename Signal<SigSignature>::type SigT;
+    reinterpret_cast<SigT *>(sigb)->connect(slof);
+    return true;
+  }
+
+  template <typename Func1, typename Func2>
+  static bool
+  disconnect(typename FunctionPointer<Func1>::Object *sender, Func1 sigf,
+             typename FunctionPointer<Func2>::Object *receiver, Func2 slof) {
+    // TODO: implement actual disconnect in Signal.h //
+    return true;
+  }
+
   template <typename FuncT>
   static inline bool connect(SignalBase *sigb, FuncT slof, Object *receiver) {
     ConnectSignal<typename FunctionPointer<FuncT>::SignalSignature>(sigb, slof,

src/Core/ObjectFactory.cpp

@@ -0,0 +1,32 @@
+#include "ObjectFactory.h"
+
+namespace uLib {
+
+ObjectFactory& ObjectFactory::Instance() {
+    static ObjectFactory instance;
+    return instance;
+}
+
+void ObjectFactory::Register(const std::string& className, FactoryFunction func) {
+    if (m_factoryMap.find(className) == m_factoryMap.end()) {
+        m_factoryMap[className] = func;
+    }
+}
+
+Object* ObjectFactory::Create(const std::string& className) {
+    auto it = m_factoryMap.find(className);
+    if (it != m_factoryMap.end()) {
+        return (it->second)();
+    }
+    return nullptr;
+}
+
+std::vector<std::string> ObjectFactory::GetRegisteredClasses() const {
+    std::vector<std::string> classes;
+    for (auto const& [name, func] : m_factoryMap) {
+        classes.push_back(name);
+    }
+    return classes;
+}
+
+} // namespace uLib

src/Core/ObjectFactory.h

@@ -0,0 +1,68 @@
+#ifndef U_CORE_OBJECTFACTORY_H
+#define U_CORE_OBJECTFACTORY_H
+
+#include <string>
+#include <map>
+#include <vector>
+#include <functional>
+#include "Core/Object.h"
+
+namespace uLib {
+
+/**
+ * @brief Singleton factory for dynamic Object instantiation based on class name.
+ */
+class ObjectFactory {
+public:
+    typedef std::function<Object*()> FactoryFunction;
+
+    /** @brief Get the singleton instance. */
+    static ObjectFactory& Instance();
+
+    /** @brief Register a factory function for a given class name. */
+    void Register(const std::string& className, FactoryFunction func);
+
+    /** @brief Create a new instance of the specified class. */
+    Object* Create(const std::string& className);
+
+    /** @brief Get the names of all registered classes. */
+    std::vector<std::string> GetRegisteredClasses() const;
+
+private:
+    ObjectFactory() = default;
+    ~ObjectFactory() = default;
+
+    // Prevent copy and assignment
+    ObjectFactory(const ObjectFactory&) = delete;
+    ObjectFactory& operator=(const ObjectFactory&) = delete;
+
+    std::map<std::string, FactoryFunction> m_factoryMap;
+};
+
+/**
+ * @brief Helper class to statically register a factory function.
+ */
+template <typename T>
+class ObjectRegistrar {
+public:
+    ObjectRegistrar(const std::string& className) {
+        ObjectFactory::Instance().Register(className, []() -> Object* { return new T(); });
+    }
+};
+
+#define ULIB_REG_CONCAT_IMPL(a, b) a##b
+#define ULIB_REG_CONCAT(a, b) ULIB_REG_CONCAT_IMPL(a, b)
+
+/**
+ * @brief Macro to register a class to the factory.
+ * Put this in the .cpp file of the class.
+ */
+#define ULIB_REGISTER_OBJECT(className) \
+    static uLib::ObjectRegistrar<className> ULIB_REG_CONCAT(g_ObjectRegistrar_, __LINE__)(#className);
+
+#define ULIB_REGISTER_OBJECT_NAME(className, registeredName) \
+    static uLib::ObjectRegistrar<className> ULIB_REG_CONCAT(g_ObjectRegistrar_, __LINE__)(registeredName);
+
+} // namespace uLib
+
+#endif // U_CORE_OBJECTFACTORY_H

src/Core/ObjectsContext.cpp

@@ -0,0 +1,63 @@
+#include "Core/ObjectsContext.h"
+#include <algorithm>
+
+namespace uLib {
+
+ObjectsContext::ObjectsContext() : Object() {}
+
+ObjectsContext::~ObjectsContext() {}
+
+void ObjectsContext::AddObject(Object* obj) {
+    if (obj && std::find(m_objects.begin(), m_objects.end(), obj) == m_objects.end()) {
+        m_objects.push_back(obj);
+        // Connect child's update to context's update to trigger re-renders
+        Object::connect(obj, &Object::Updated, this, &Object::Updated);
+        ULIB_SIGNAL_EMIT(ObjectsContext::ObjectAdded, obj);
+        this->Updated(); // Signal that the context has been updated
+    }
+}
+
+void ObjectsContext::RemoveObject(Object* obj) {
+    auto it = std::find(m_objects.begin(), m_objects.end(), obj);
+    if (it != m_objects.end()) {
+        Object* removedObj = *it;
+        m_objects.erase(it);
+        ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, removedObj);
+        this->Updated(); // Signal that the context has been updated
+    }
+}
+
+void ObjectsContext::Clear() {
+    if (!m_objects.empty()) {
+        for (auto obj : m_objects) {
+            ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, obj);
+        }
+        m_objects.clear();
+        this->Updated();
+    }
+}
+
+const std::vector<Object*>& ObjectsContext::GetObjects() const {
+    return m_objects;
+}
+
+size_t ObjectsContext::GetCount() const {
+    return m_objects.size();
+}
+
+Object* ObjectsContext::GetObject(size_t index) const {
+    if (index < m_objects.size()) {
+        return m_objects[index];
+    }
+    return nullptr;
+}
+
+void ObjectsContext::ObjectAdded(Object* obj) {
+    ULIB_SIGNAL_EMIT(ObjectsContext::ObjectAdded, obj);
+}
+
+void ObjectsContext::ObjectRemoved(Object* obj) {
+    ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, obj);
+}
+
+} // namespace uLib

src/Core/ObjectsContext.h

@@ -0,0 +1,67 @@
+#ifndef U_CORE_OBJECTS_CONTEXT_H
+#define U_CORE_OBJECTS_CONTEXT_H
+
+#include "Core/Object.h"
+#include <vector>
+
+namespace uLib {
+
+/**
+ * @brief ObjectsContext represents a collection of Object instances.
+ */
+class ObjectsContext : public Object {
+public:
+    ObjectsContext();
+    virtual ~ObjectsContext();
+
+    virtual const char * GetClassName() const { return "ObjectsContext"; }
+
+    /**
+     * @brief Adds an object to the context.
+     * @param obj Pointer to the object to add.
+     */
+    void AddObject(Object* obj);
+
+    /**
+     * @brief Removes an object from the context.
+     * @param obj Pointer to the object to remove.
+     */
+    void RemoveObject(Object* obj);
+
+    /**
+     * @brief Clears all objects from the context.
+     */
+    void Clear();
+
+    /**
+     * @brief Returns the collection of objects.
+     * @return Const reference to the vector of object pointers.
+     */
+    const std::vector<Object*>& GetObjects() const;
+    
+    signals:
+    /** @brief Signal emitted when an object is added. */
+    virtual void ObjectAdded(Object* obj);
+    /** @brief Signal emitted when an object is removed. */
+    virtual void ObjectRemoved(Object* obj);
+
+    /**
+     * @brief Returns the number of objects in the context.
+     * @return Size of the collection.
+     */
+    size_t GetCount() const;
+
+    /**
+     * @brief Returns an object by index.
+     * @param index The index of the object.
+     * @return Pointer to the object or nullptr if index is out of bounds.
+     */
+    Object* GetObject(size_t index) const;
+
+private:
+    std::vector<Object*> m_objects;
+};
+
+} // namespace uLib
+
+#endif // U_CORE_OBJECTS_CONTEXT_H

src/Core/Property.h

@@ -0,0 +1,228 @@
+#ifndef U_CORE_PROPERTY_H
+#define U_CORE_PROPERTY_H
+
+#include <string>
+#include <sstream>
+#include <typeinfo>
+#include <typeindex> // Added
+#include <boost/serialization/nvp.hpp>
+#include <boost/lexical_cast.hpp>
+#include "Core/Archives.h"
+#include "Core/Signal.h"
+#include "Core/Object.h"
+
+namespace uLib {
+
+/**
+ * @brief Base class for properties to allow runtime listing and identification.
+ */
+class PropertyBase : public Object {
+public:
+  virtual ~PropertyBase() {}
+  virtual const std::string& GetName() const = 0;
+  virtual const char* GetTypeName() const = 0;
+  virtual std::string GetValueAsString() const = 0;
+  virtual std::type_index GetTypeIndex() const = 0; // Added
+
+  // Signal support
+  signals:
+  virtual void Updated() override { ULIB_SIGNAL_EMIT(PropertyBase::Updated); }
+
+  // Serialization support for different uLib archives
+  virtual void serialize(Archive::xml_oarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::xml_iarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::text_oarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::text_iarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::hrt_oarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::hrt_iarchive & ar, const unsigned int version) = 0;
+  virtual void serialize(Archive::log_archive & ar, const unsigned int version) = 0;
+};
+
+/**
+ * @brief Template class for typed properties.
+ */
+template <typename T>
+class Property : public PropertyBase {
+public:
+  // PROXY: Use an existing variable as back-end storage
+  Property(Object* owner, const std::string& name, T* valuePtr)
+    : m_owner(owner), m_name(name), m_value(valuePtr), m_own(false) {
+      if (m_owner) {
+          m_owner->RegisterProperty(this);
+      }
+  }
+
+  // MANAGED: Create and own internal storage
+  Property(Object* owner, const std::string& name, const T& defaultValue = T())
+    : m_owner(owner), m_name(name), m_value(new T(defaultValue)), m_own(true) {
+      if (m_owner) {
+          m_owner->RegisterProperty(this);
+      }
+  }
+
+  virtual ~Property() {
+      if (m_own) delete m_value;
+  }
+
+  // Identification
+  virtual const std::string& GetName() const override { return m_name; }
+  virtual const char* GetTypeName() const override { return typeid(T).name(); }
+  virtual std::type_index GetTypeIndex() const override { return std::type_index(typeid(T)); }
+
+  
+  std::string GetValueAsString() const override {
+      try {
+          return boost::lexical_cast<std::string>(*m_value);
+      } catch (const boost::bad_lexical_cast&) {
+          std::stringstream ss;
+          ss << *m_value;
+          return ss.str();
+      }
+  }
+
+  // Accessors
+  const T& Get() const { return *m_value; }
+  void Set(const T& value) {
+    if (*m_value != value) {
+      *m_value = value;
+      ULIB_SIGNAL_EMIT(Property<T>::PropertyChanged);
+      this->Updated();
+      if (m_owner) m_owner->Updated();
+    }
+  }
+
+  // Operators for seamless usage
+  operator const T&() const { return *m_value; }
+  Property& operator=(const T& value) {
+    Set(value);
+    return *this;
+  }
+
+  // Signals
+  signals:
+  virtual void PropertyChanged() { ULIB_SIGNAL_EMIT(Property<T>::PropertyChanged); }
+
+  // Serialization
+  template <class ArchiveT>
+  void serialize_impl(ArchiveT & ar, const unsigned int version) {
+    ar & boost::serialization::make_nvp(m_name.c_str(), *m_value);
+  }
+
+  void serialize(Archive::xml_oarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::xml_iarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::text_oarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::text_iarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::hrt_oarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::hrt_iarchive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+  void serialize(Archive::log_archive & ar, const unsigned int v) override { serialize_impl(ar, v); }
+
+private:
+  std::string m_name;
+  T* m_value;
+  bool m_own;
+  Object* m_owner;
+};
+
+/**
+ * @brief Conveninent typedefs for common property types.
+ */
+typedef Property<std::string> StringProperty;
+typedef Property<int>           IntProperty;
+typedef Property<unsigned int>  UIntProperty;
+typedef Property<long>          LongProperty;
+typedef Property<unsigned long> ULongProperty;
+typedef Property<float>         FloatProperty;
+typedef Property<double>        DoubleProperty;
+typedef Property<Bool_t>      BoolProperty;
+
+/**
+ * @brief Macro to simplify property declaration within a class.
+ * Usage: ULIB_PROPERTY(float, Width, 1.0f)
+ * It creates a raw member m_Width and a Property proxy Width.
+ */
+#define ULIB_PROPERTY(type, name, defaultValue) \
+    type m_##name = defaultValue; \
+    Property<type> name = Property<type>(this, #name, &m_##name);
+
+
+} // namespace uLib
+
+namespace uLib {
+namespace Archive {
+class property_register_archive;
+} // namespace Archive
+} // namespace uLib
+
+namespace boost {
+namespace archive {
+namespace detail {
+template <>
+class interface_oarchive<uLib::Archive::property_register_archive>
+    : public uLib_interface_oarchive<uLib::Archive::property_register_archive> {};
+} // namespace detail
+} // namespace archive
+} // namespace boost
+
+namespace uLib {
+namespace Archive {
+
+/**
+ * @brief A special archive that creates and registers Property proxies
+ * for any member it encounters wrapped in HRP().
+ */
+class property_register_archive : 
+    public boost::archive::detail::common_oarchive<property_register_archive>
+{
+    Object* m_Object;
+public:
+    friend class boost::archive::detail::interface_oarchive<property_register_archive>;
+    friend class boost::archive::save_access;
+
+    typedef boost::archive::detail::common_oarchive<property_register_archive> detail_common_oarchive;
+
+    property_register_archive(Object* obj) : 
+        boost::archive::detail::common_oarchive<property_register_archive>(boost::archive::no_header),
+        m_Object(obj) {}
+    
+    // Core logic: encounter HRP -> Create Dynamic Property
+    template<class T>
+    void save_override(const boost::serialization::hrp<T> &t) {
+        if (m_Object) {
+            // We use const_cast because we are just creating a proxy to the member
+            m_Object->RegisterDynamicProperty(
+                new Property<T>(m_Object, t.name(), &const_cast<boost::serialization::hrp<T>&>(t).value())
+            );
+        }
+    }
+
+    // Handle standard NVPs by recursing (important for base classes)
+    template<class T>
+    void save_override(const boost::serialization::nvp<T> &t) {
+        boost::archive::detail::common_oarchive<property_register_archive>::save_override(t.const_value());
+    }
+
+    // Ignore everything else
+    template<class T> void save_override(const T &t) {}
+
+    // Required attribute overrides for common_oarchive
+    void save_override(const boost::archive::object_id_type & t) {}
+    void save_override(const boost::archive::object_reference_type & t) {}
+    void save_override(const boost::archive::version_type & t) {}
+    void save_override(const boost::archive::class_id_type & t) {}
+    void save_override(const boost::archive::class_id_optional_type & t) {}
+    void save_override(const boost::archive::class_id_reference_type & t) {}
+    void save_override(const boost::archive::class_name_type & t) {}
+    void save_override(const boost::archive::tracking_type & t) {}
+};
+
+/**
+ * @brief Convenience macro to automatically activate and register all HRP members 
+ * as uLib properties. Usage: ULIB_ACTIVATE_PROPERTIES(obj)
+ */
+#define ULIB_ACTIVATE_PROPERTIES(obj) \
+    { uLib::Archive::property_register_archive _ar_tmp(&(obj)); (obj).serialize(_ar_tmp, 0); }
+
+} // namespace Archive
+} // namespace uLib
+
+#endif // U_CORE_PROPERTY_H

src/Core/Serializable.h

@@ -72,39 +72,33 @@ namespace serialization {
 template <class T> struct access2 {};
 
 // NON FUNZIONA ... SISTEMARE !!!! // ------------------------------------------
-template <class T> class hrp : public wrapper_traits<const hrp<T>> {
+template <class T>
+class hrp : public boost::serialization::wrapper_traits<hrp<T>> {
   const char *m_name;
-  T *m_value;
-  std::string *m_str;
+  T &m_value;
 
 public:
-  explicit hrp(const char *name_, T &t)
-      : m_str(new std::string), m_name(name_), m_value(&t) {}
+  explicit hrp(const char *name_, T &t) : m_name(name_), m_value(t) {}
 
   const char *name() const { return this->m_name; }
+  T &value() { return this->m_value; }
+  const T &const_value() const { return this->m_value; }
+
+  BOOST_SERIALIZATION_SPLIT_MEMBER()
 
   template <class Archivex>
-  void save(Archivex &ar, const unsigned int /* file_version */) const {
-    ////        ar.operator<<(const_value());
-    //        std::stringstream ss;
-    //        uLib::Archive::hrt_oarchive har(ss);
-    //        har << make_nvp(m_name,*m_value);
-    //        //        (*m_str) = ss.str();
-    ////        ar.operator << (make_nvp(m_name, ss.str());
+  void save(Archivex &ar, const unsigned int /* version */) const {
+    ar << boost::serialization::make_nvp(m_name, m_value);
   }
+
   template <class Archivex>
-  void load(Archivex &ar, const unsigned int /* file_version */) {
-    //        ar.operator>>(value());
+  void load(Archivex &ar, const unsigned int /* version */) {
+    ar >> boost::serialization::make_nvp(m_name, m_value);
   }
-  BOOST_SERIALIZATION_SPLIT_MEMBER()
 };
 
 template <class T>
-inline
-#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
-    const
-#endif
-    hrp<T> make_hrp(const char *name, T &t) {
+inline hrp<T> make_hrp(const char *name, T &t) {
   return hrp<T>(name, t);
 }
 

src/Core/Signal.h

@@ -43,11 +43,23 @@ using namespace boost::placeholders;
 // Signals macro //
 
 #define default(vlaue)
-#define slots
+#ifndef Q_MOC_RUN
+#ifndef signals
 #define signals /*virtual void init_signals();*/ public
+#endif
+#ifndef slots
+#define slots
+#endif
+#ifndef emit
 #define emit
+#endif
+#endif
+#ifndef SLOT
 #define SLOT(a) BOOST_STRINGIZE(a)
+#endif
+#ifndef SIGNAL
 #define SIGNAL(a) BOOST_STRINGIZE(a)
+#endif
 
 #define _ULIB_DETAIL_SIGNAL_EMIT(_name, ...)                                   \
   do {                                                                         \

src/Core/Types.h

@@ -139,6 +139,7 @@ typedef id_t Id_t;
 typedef void *Pointer_t;
 typedef bool Bool_t; // Boolean (0=false, 1=true) (bool)
 
+
 //--- bit manipulation ---------------------------------------------------------
 #ifndef BIT
 #define BIT(n) (1ULL << (n))

src/Core/testing/CMakeLists.txt

@@ -21,6 +21,8 @@ set( TESTS
         OptionsTest
         PingPongTest
         VectorMetaAllocatorTest
+        PropertyTypesTest
+        HRPTest
 )
 
 set(LIBRARIES

src/Core/testing/HRPTest.cpp

@@ -0,0 +1,83 @@
+#include <iostream>
+#include <sstream>
+#include "Core/Object.h"
+#include "Core/Property.h"
+#include "Core/Serializable.h"
+#include "Core/Archives.h"
+
+using namespace uLib;
+
+struct SimpleObject {
+    int value;
+    std::string name;
+ 
+    template<class Archive>
+    void serialize(Archive & ar, const unsigned int version) {
+        ar & HRP(value);
+        ar & HRP(name);
+    }
+};
+ 
+struct DynamicObject : public Object {
+    float width;
+    int height;
+ 
+    DynamicObject() : width(10.0f), height(20) {
+        // Automatic registration of properties based on serialize/HRP
+        ULIB_ACTIVATE_PROPERTIES(*this);
+    }
+ 
+    template<class Archive>
+    void serialize(Archive & ar, const unsigned int version) {
+        ar & HRP(width);
+        ar & HRP(height);
+    }
+};
+
+int main() {
+    SimpleObject obj;
+    obj.value = 42;
+    obj.name = "TestObject";
+
+    std::cout << "Testing HRP Serialization to Log..." << std::endl;
+    std::stringstream ss;
+    {
+        uLib::Archive::log_archive ar(ss);
+        ar << boost::serialization::make_nvp("Object", obj);
+    }
+    std::cout << ss.str() << std::endl;
+
+    std::cout << "Testing HRP Serialization to HRT..." << std::endl;
+    ss.str("");
+    {
+        uLib::Archive::hrt_oarchive ar(ss);
+        ar << obj;
+    }
+    std::cout << ss.str() << std::endl;
+ 
+    std::cout << "Testing HRP Serialization to XML..." << std::endl;
+    ss.str("");
+    {
+        uLib::Archive::xml_oarchive ar(ss);
+        ar << boost::serialization::make_nvp("Object", obj);
+    }
+    std::cout << ss.str() << std::endl;
+ 
+    std::cout << "Testing Dynamic Property Creation via ULIB_ACTIVATE_PROPERTIES macro..." << std::endl;
+    DynamicObject dynObj;
+    // (properties were already created in DynamicObject constructor via macro)
+    
+    std::cout << "Registered Properties in dynObj:" << std::endl;
+    const auto& props = dynObj.GetProperties();
+    for (auto* p : props) {
+        std::cout << "  - [" << p->GetTypeName() << "] " << p->GetName() << " = " << p->GetValueAsString() << std::endl;
+    }
+    
+    if (props.size() == 2) {
+        std::cout << "Dynamic Property Creation SUCCESS!" << std::endl;
+    } else {
+        std::cout << "Dynamic Property Creation FAILED (Expected 2, got " << props.size() << ")" << std::endl;
+    }
+ 
+    return 0;
+}

src/Core/testing/PropertySystemTest.cpp

@@ -0,0 +1,64 @@
+#include <iostream>
+#include <sstream>
+#include "Core/Object.h"
+#include "Core/Property.h"
+#include <cassert>
+
+using namespace uLib;
+
+class TestObject : public Object {
+public:
+  TestObject() : Object(), 
+    IntProp(this, "IntProp", 10),
+    StringProp(this, "StringProp", "Initial") 
+  {}
+
+  virtual const char* GetClassName() const override { return "TestObject"; }
+
+  Property<int> IntProp;
+  Property<std::string> StringProp;
+};
+
+int main() {
+  TestObject obj;
+  
+  std::cout << "Testing Properties..." << std::endl;
+  
+  // 1. Check registration
+  const auto& props = obj.GetProperties();
+  assert(props.size() == 2);
+  assert(props[0]->GetName() == "IntProp");
+  assert(props[1]->GetName() == "StringProp");
+  
+  // 2. Check value access and signals
+  bool signalCalled = false;
+  uLib::Object::connect(&obj.IntProp, &Property<int>::PropertyChanged, [&signalCalled]() {
+      signalCalled = true;
+  });
+  
+  assert(obj.IntProp.Get() == 10);
+  obj.IntProp = 20;
+  assert(obj.IntProp.Get() == 20);
+  assert(signalCalled == true);
+  
+  // 3. Check serialization
+  std::stringstream ss;
+  Object::SaveXml(ss, obj);
+  std::string xml = ss.str();
+  std::cout << "Serialized XML: \n" << xml << std::endl;
+  
+  assert(xml.find("<IntProp>20</IntProp>") != std::string::npos);
+  assert(xml.find("<StringProp>Initial</StringProp>") != std::string::npos);
+  
+  // 4. Check deserialization
+  TestObject obj2;
+  std::stringstream ss2(xml);
+  Object::LoadXml(ss2, obj2);
+  
+  assert(obj2.IntProp.Get() == 20);
+  assert(obj2.StringProp.Get() == "Initial");
+  
+  std::cout << "All Property Tests PASSED!" << std::endl;
+  
+  return 0;
+}

src/Core/testing/PropertyTypesTest.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+#include <sstream>
+#include <cassert>
+#include "Core/Object.h"
+#include "Core/Property.h"
+#include "Math/Dense.h"
+
+using namespace uLib;
+
+class TestObject : public Object {
+public:
+  TestObject() : Object() {}
+
+  virtual const char* GetClassName() const override { return "TestObject"; }
+
+  // Use new typedefs
+  StringProperty  StringProp = StringProperty(this, "StringProp", "Initial");
+  IntProperty     IntProp    = IntProperty(this, "IntProp", 42);
+  FloatProperty   FloatProp  = FloatProperty(this, "FloatProp", 3.14f);
+  BoolProperty    BoolProp   = BoolProperty(this, "BoolProp", true);
+
+  // Use new macro
+  ULIB_PROPERTY(Matrix3f, MatrixProp, Matrix3f::Identity())
+
+  // Use new Dense typedefs
+  Vector3fProperty Vector3fProp = Vector3fProperty(this, "Vector3fProp", Vector3f(1.1f, 2.2f, 3.3f));
+  Matrix4fProperty Matrix4fProp = Matrix4fProperty(this, "Matrix4fProp", Matrix4f::Identity());
+};
+
+int main() {
+  TestObject obj;
+  
+  std::cout << "Testing Property Types..." << std::endl;
+  
+  // 1. Verify string representation
+  std::cout << "StringProp: " << obj.StringProp.GetValueAsString() << std::endl;
+  assert(obj.StringProp.GetValueAsString() == "Initial");
+
+  std::cout << "IntProp: " << obj.IntProp.GetValueAsString() << std::endl;
+  assert(obj.IntProp.GetValueAsString() == "42");
+
+  std::cout << "FloatProp: " << obj.FloatProp.GetValueAsString() << std::endl;
+  // boost::lexical_cast might have different precision, but for 3.14 it should be okay or we check find
+  assert(obj.FloatProp.GetValueAsString().find("3.14") != std::string::npos);
+
+  std::cout << "BoolProp: " << obj.BoolProp.GetValueAsString() << std::endl;
+  // Bool might be "1" or "true" depending on lexical_cast/stringstream
+  assert(obj.BoolProp.GetValueAsString() == "1" || obj.BoolProp.GetValueAsString() == "true");
+
+  // 2. Verify Matrix/Vector string representation (uses operator<<)
+  std::cout << "MatrixProp: \n" << obj.MatrixProp.GetValueAsString() << std::endl;
+  assert(obj.MatrixProp.GetValueAsString().find("1 0 0") != std::string::npos);
+
+  std::cout << "Vector3fProp: " << obj.Vector3fProp.GetValueAsString() << std::endl;
+  assert(obj.Vector3fProp.GetValueAsString().find("1.1 2.2 3.3") != std::string::npos);
+
+  std::cout << "Matrix4fProp: \n" << obj.Matrix4fProp.GetValueAsString() << std::endl;
+  assert(obj.Matrix4fProp.GetValueAsString().find("1 0 0 0") != std::string::npos);
+
+  // 3. Verify updates and signals
+  obj.IntProp = 100;
+  assert(obj.IntProp.Get() == 100);
+  assert(obj.IntProp.GetValueAsString() == "100");
+
+  std::cout << "All Property Type Tests PASSED!" << std::endl;
+  
+  return 0;
+}

src/Detectors/CMakeLists.txt

@@ -1,12 +0,0 @@
-set(HEADERS MuonScatter.h MuonError.h MuonEvent.h)
-
-set(ULIB_SELECTED_MODULES ${ULIB_SELECTED_MODULES} Detectors PARENT_SCOPE)
-
-
-install(FILES ${HEADERS}
-        DESTINATION ${INSTALL_INC_DIR}/Detectors)
-
-if(BUILD_TESTING)
-  include(uLibTargetMacros)
-  add_subdirectory(testing)
-endif()

src/Detectors/Solid.cpp

@@ -1,114 +0,0 @@
-/*//////////////////////////////////////////////////////////////////////////////
-// CMT Cosmic Muon Tomography project //////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////////////
-
-  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
-  All rights reserved
-
-  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
-
-  ------------------------------------------------------------------
-  This library is free software;  you  can  redistribute  it  and/or
-  modify it  under the  terms  of  the  GNU  Lesser  General  Public
-  License as published  by  the  Free  Software  Foundation;  either
-  version 3.0 of the License, or (at your option) any later version.
-
-  This library is  distributed in  the hope that it will  be useful,
-  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
-  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of  the GNU Lesser General  Public
-  License along with this library.
-
-//////////////////////////////////////////////////////////////////////////////*/
-
-
-
-// G4 Solid //
-#include <Geant4/G4Material.hh>
-#include <Geant4/G4NistManager.hh>
-#include <Geant4/G4LogicalVolume.hh>
-
-// Tessellated solid //
-#include <Geant4/G4TessellatedSolid.hh>
-#include <Geant4/G4TriangularFacet.hh>
-#include <Geant4/G4ThreeVector.hh>
-
-
-#include "Math/Dense.h"
-
-#include "Solid.h"
-
-namespace uLib {
-
-class DetectorsSolidPimpl {
-public:
-    static G4ThreeVector getG4Vector3f(const Vector3f &vector) {
-        return G4ThreeVector( vector(0), vector(1), vector(2) );
-    }
-};
-
-
-
-Solid::Solid() :
-    m_Logical (new G4LogicalVolume(NULL,NULL,"unnamed_solid")),
-    m_Material(NULL)
-{}
-
-Solid::Solid(const char *name) :
-    m_Logical(new G4LogicalVolume(NULL,NULL,name)),
-    m_Material(NULL)
-{}
-
-
-
-void Solid::SetNistMaterial(const char *name)
-{
-    G4NistManager *nist = G4NistManager::Instance();
-    if (m_Material) delete m_Material;
-    m_Material = nist->FindOrBuildMaterial(name);
-    m_Logical->SetMaterial(m_Material);
-}
-
-void Solid::SetMaterial(G4Material *material)
-{
-    if(material)
-    {
-        m_Material = material;
-        m_Logical->SetMaterial(material);
-    }
-}
-
-
-
-
-
-
-
-
-
-
-TessellatedSolid::TessellatedSolid(const char *name) :
-    BaseClass(name),
-    m_Solid(new G4TessellatedSolid(name))
-{}
-
-
-void TessellatedSolid::SetMesh(TriangleMesh &mesh)
-{
-    G4TessellatedSolid *ts = this->m_Solid;
-    for (int i=0; i<mesh.Triangles().size(); ++i) {
-        const Vector3i &trg = mesh.Triangles().at(i);
-        G4TriangularFacet *facet = new G4TriangularFacet(
-                    DetectorsSolidPimpl::getG4Vector3f(mesh.Points().at(trg(0))),
-                    DetectorsSolidPimpl::getG4Vector3f(mesh.Points().at(trg(1))),
-                    DetectorsSolidPimpl::getG4Vector3f(mesh.Points().at(trg(2))),
-                    ABSOLUTE);
-        ts->AddFacet((G4VFacet *)facet);
-    }
-    this->m_Logical->SetSolid(ts);
-}
-
-
-}

src/Detectors/testing/Makefile.am

@@ -1,16 +0,0 @@
-
-include $(top_srcdir)/Common.am
-
-#AM_DEFAULT_SOURCE_EXT = .cpp
-
-# if HAVE_CHECK
-TESTS = GDMLSolidTest
-
-# else
-# TEST =
-# endif
-
-LDADD = $(top_srcdir)/libmutom-${PACKAGE_VERSION}.la
-
-check_PROGRAMS = $(TESTS)
-

src/HEP/CMakeLists.txt

@@ -0,0 +1,13 @@
+
+################################################################################
+##### HEP - High Energy Physics modules ########################################
+################################################################################
+
+include_directories(${SRC_DIR}/HEP)
+
+add_subdirectory(Detectors)
+add_subdirectory(Geant)
+# add_subdirectory(MuonTomography)
+
+set(ULIB_SHARED_LIBRARIES ${ULIB_SHARED_LIBRARIES} PARENT_SCOPE)
+set(ULIB_SELECTED_MODULES ${ULIB_SELECTED_MODULES} PARENT_SCOPE)

src/HEP/Detectors/CMakeLists.txt

@@ -0,0 +1,46 @@
+set(HEADERS
+    ChamberHitEvent.h
+    DetectorChamber.h
+    ExperimentFitEvent.h
+    HierarchicalEncoding.h
+    Hit.h
+    HitMC.h
+    LinearFit.h
+    MuonError.h
+    MuonEvent.h
+    MuonScatter.h
+)
+
+set(SOURCES
+    DetectorChamber.cpp
+)
+
+set(LIBRARIES
+       ${PACKAGE_LIBPREFIX}Core
+       ${PACKAGE_LIBPREFIX}Math
+)
+
+set(libname ${PACKAGE_LIBPREFIX}Detectors)
+set(ULIB_SHARED_LIBRARIES ${ULIB_SHARED_LIBRARIES} ${libname} PARENT_SCOPE)
+set(ULIB_SELECTED_MODULES ${ULIB_SELECTED_MODULES} Detectors PARENT_SCOPE)
+
+## SHARED library
+add_library(${libname} SHARED ${SOURCES})
+set_target_properties(${libname} PROPERTIES
+                      VERSION ${PROJECT_VERSION}
+                      SOVERSION ${PROJECT_SOVERSION}
+                      CXX_STANDARD 17)
+target_link_libraries(${libname} PRIVATE ${LIBRARIES})
+
+install(TARGETS ${libname}
+        EXPORT "uLibTargets"
+        RUNTIME DESTINATION ${INSTALL_BIN_DIR} COMPONENT bin
+        LIBRARY DESTINATION ${INSTALL_LIB_DIR} COMPONENT lib)
+
+install(FILES ${HEADERS}
+        DESTINATION ${INSTALL_INC_DIR}/HEP/Detectors)
+
+if(BUILD_TESTING)
+  include(uLibTargetMacros)
+  add_subdirectory(testing)
+endif()

src/HEP/Detectors/ChamberHitEvent.h

@@ -29,8 +29,8 @@
 #define U_CHAMBERHITEVENT_H
 
 #include "Core/Vector.h"
-#include "Hit.h"
-#include "ChamberDetector.h"
+#include "Detectors/HitMC.h"
+#include "Detectors/DetectorChamber.h"
 
 namespace uLib {
 
@@ -38,17 +38,17 @@ class ChamberHitEventData
 {
 public:
     uLibConstRefMacro (Hits, Vector<HitData>    )
-    uLibGetMacro      (Idv,  ChamberDetector::ID)
+    uLibGetMacro      (Idv,  uint)
 private:
     friend class ChamberHitEvent;
     Vector<HitData>     m_Hits;
-    DetectorChamber::ID m_Idv; // -> chamber/view
+    uint                m_Idv; // -> chamber/view
 };
 
 class ChamberHitEvent : public ChamberHitEventData {
 public:
     uLibRefMacro  (Hits, Vector<HitData>    )
-    uLibSetMacro  (Idv,  ChamberDetector::ID)
+    uLibSetMacro  (Idv,  uint)
 };
 
 }

src/HEP/Detectors/DetectorChamber.cpp

@@ -0,0 +1,49 @@
+#include "HEP/Detectors/DetectorChamber.h"
+#include "Core/ObjectFactory.h"
+#include <cmath>
+
+namespace uLib {
+
+MuonEvent DetectorChamber::ProjectMuonEvent(const MuonEvent &muon) const {
+  MuonEvent projectedMuon = muon;
+
+  // Transform the local projection plane to world coordinates
+  HLine3f worldPlane = this->GetWorldProjectionPlane();
+  HPoint3f P = worldPlane.origin;
+  HVector3f N = worldPlane.direction;
+
+  HPoint3f X_in = muon.LineIn().origin;
+  HPoint3f X_out = muon.LineOut().origin;
+
+  // Let's use distance to the plane for the first part and keep the logic consistent.  
+  float dist_in = std::abs((X_in - P).dot(N));
+  float dist_out = std::abs((X_out - P).dot(N));
+
+  const HLine3f &chosenLine = (dist_in <= dist_out) ? muon.LineIn() : muon.LineOut();
+  HPoint3f X_chosen = chosenLine.origin;
+
+  // Project X_chosen into the plane defined by P and normal N
+  // X_proj = X_chosen - ((X_chosen - P) . N / (N . N)) * N
+  float dot = (X_chosen - P).dot(N);
+  float n_sq = N.dot(N);
+
+  HPoint3f X_proj = X_chosen;
+  if (n_sq > 0) {
+    X_proj = X_chosen - (dot / n_sq) * N;
+  }
+
+  // Define the projected line with projected origin and original direction
+  HLine3f projectedLine;
+  projectedLine.origin = X_proj;
+  projectedLine.direction = chosenLine.direction;
+
+  // Set both input and output lines of the projected muon to the same projected line
+  projectedMuon.LineIn() = projectedLine;
+  projectedMuon.LineOut() = projectedLine;
+
+  return projectedMuon;
+}
+
+ULIB_REGISTER_OBJECT(DetectorChamber)
+
+} // namespace uLib

src/HEP/Detectors/DetectorChamber.h

@@ -0,0 +1,86 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+
+
+#ifndef U_CHAMBERDETECTOR_H
+#define U_CHAMBERDETECTOR_H
+
+#include "Core/Types.h"
+#include "Math/ContainerBox.h"
+
+#include "HEP/Detectors/Hit.h"
+#include "HEP/Detectors/HitMC.h"
+#include "HEP/Detectors/MuonEvent.h"
+
+namespace uLib {
+
+
+class DetectorChamber : public ContainerBox {
+
+  typedef ContainerBox BaseClass;
+  
+
+public:
+
+  virtual const char * GetClassName() const { return "DetectorChamber"; }
+
+  DetectorChamber() : BaseClass() {
+    m_ProjectionPlane.origin = HPoint3f(0, 0, 0);
+    m_ProjectionPlane.direction = HVector3f(0, 0, 1);
+  }
+
+  DetectorChamber(const Vector3f &size) : BaseClass(size) {
+    m_ProjectionPlane.origin = HPoint3f(0, 0, 0);
+    m_ProjectionPlane.direction = HVector3f(0, 0, 1);
+  }
+
+  // set the plane where muons hit is projected 
+  // coordinates are local to the container box
+  void SetProjectionPlane(const HLine3f &normal) { m_ProjectionPlane = normal; }
+
+  const HLine3f &GetProjectionPlane() const { return m_ProjectionPlane; }
+
+  HLine3f GetWorldProjectionPlane() const {
+    HLine3f worldPlane;
+    Matrix4f M = this->GetWorldMatrix();
+    worldPlane.origin = M * m_ProjectionPlane.origin;
+    HVector3f dirNorm = M * m_ProjectionPlane.direction;
+    dirNorm.normalize(); // Normalize for consistent dot products
+    worldPlane.direction = dirNorm;
+    return worldPlane;
+  }
+
+  MuonEvent ProjectMuonEvent(const MuonEvent &muon) const;
+
+private:
+  HLine3f m_ProjectionPlane;
+};
+
+
+}
+
+
+#endif // CHAMBERDETECTOR_H

src/HEP/Detectors/Hit.h

@@ -33,9 +33,6 @@
 namespace uLib {
 
 
-
-
-
 class HitRawCode_CMSDrift :
         public BitCode4<unsigned short,6,3,2,5>
 {
@@ -59,7 +56,13 @@ public:
 };
 
 
-
+class HitData {
+public:
+    HitData() {}
+    ~HitData() {}
+    
+    
+};
 
 
 

src/HEP/Detectors/MuonEvent.h

@@ -48,6 +48,10 @@ protected:
 
 class MuonEvent  : public MuonEventData {
 public:
+    using MuonEventData::LineIn;
+    using MuonEventData::LineOut;
+    using MuonEventData::GetMomentum;
+
     inline HLine3f & LineIn() { return this->m_LineIn; }
     inline HLine3f & LineOut() { return this->m_LineOut; }
     inline Scalarf & Momentum() { return this->m_Momentum; }

src/HEP/Detectors/testing/CMakeLists.txt

@@ -1,12 +1,13 @@
 # TESTS
 set( TESTS
-#            GDMLSolidTest
             HierarchicalEncodingTest
+            DetectorChamberTest
 )
 
 set(LIBRARIES
        ${PACKAGE_LIBPREFIX}Core
        ${PACKAGE_LIBPREFIX}Math
+       ${PACKAGE_LIBPREFIX}Detectors
        Boost::serialization
        Boost::program_options
        Eigen3::Eigen

src/HEP/Detectors/testing/DetectorChamberTest.cpp

@@ -0,0 +1,139 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#include "HEP/Detectors/DetectorChamber.h"
+#include "testing-prototype.h"
+#include <iostream>
+
+using namespace uLib;
+
+int main() {
+    BEGIN_TESTING(DetectorChamber Projection);
+
+    DetectorChamber chamber;
+
+    // Define a horizontal plane at z = 100
+    HLine3f plane;
+    plane.origin = HPoint3f(0, 0, 100);
+    plane.direction = HVector3f(0, 0, 1); // Normal to the plane
+    chamber.SetProjectionPlane(plane);
+
+    // Create a muon with two segments
+    MuonEvent muon;
+    
+    // Segment 1 (muon.LineIn()): origin is at (10, 20, 50), direction along Z
+    muon.LineIn().origin = HPoint3f(10, 20, 50);
+    muon.LineIn().direction = HVector3f(0, 0, 1);
+    
+    // Segment 2 (muon.LineOut()): origin is at (10, 20, 200), direction along Z
+    muon.LineOut().origin = HPoint3f(10, 20, 200);
+    muon.LineOut().direction = HVector3f(0, 0, 1);
+    
+    // distance_in = |50 - 100| = 50
+    // distance_out = |200 - 100| = 100
+    // LineIn is closer to the plane (z=100)
+    
+    MuonEvent projected = chamber.ProjectMuonEvent(muon);
+
+    // Expected:
+    // chosenLine = LineIn (it is closer)
+    // X_chosen = (10, 20, 50)
+    // X_proj = (10, 20, 50) - (( (10, 20, 50) - (0, 0, 100) ) . (0, 0, 1)) * (0, 0, 1)
+    // X_proj = (10, 20, 50) - (-50) * (0, 0, 1) = (10, 20, 100)
+    
+    HPoint3f expectedPos(10, 20, 100);
+    
+    std::cout << "Test Case 1: LineIn is closer" << std::endl;
+    std::cout << "Projected Position: " << projected.LineIn().origin.transpose() << std::endl;
+    std::cout << "Expected Position:  " << expectedPos.transpose() << std::endl;
+
+    // Check if the projected position is correct
+    // norm() includes the 4th component, which for HVector3f (diff of points) should be 0.
+    bool posOk1 = (projected.LineIn().origin - expectedPos).norm() < 1e-5;
+    TEST1(posOk1);
+
+    // Check if LineIn and LineOut are the same
+    bool linesMatch1 = (projected.LineIn().origin == projected.LineOut().origin) &&
+                       (projected.LineIn().direction == projected.LineOut().direction);
+    TEST1(linesMatch1);
+    
+    // Test Case 2: LineOut is closer
+    muon.LineIn().origin = HPoint3f(30, 40, 0);      // dist = 100
+    muon.LineOut().origin = HPoint3f(30, 40, 110);   // dist = 10
+    
+    projected = chamber.ProjectMuonEvent(muon);
+    expectedPos = HPoint3f(30, 40, 100); // projection of (30,40,110) onto z=100
+    
+    std::cout << "\nTest Case 2: LineOut is closer" << std::endl;
+    std::cout << "Projected Position: " << projected.LineIn().origin.transpose() << std::endl;
+    std::cout << "Expected Position:  " << expectedPos.transpose() << std::endl;
+
+    bool posOk2 = (projected.LineIn().origin - expectedPos).norm() < 1e-5;
+    TEST1(posOk2);
+    
+    // Test Case 3: Oblique plane
+    // Plane through (0,0,0) with normal (1,1,1) (normalized)
+    plane.origin = HPoint3f(0, 0, 0);
+    plane.direction = HVector3f(1, 1, 1).normalized();
+    chamber.SetProjectionPlane(plane);
+    
+    muon.LineIn().origin = HPoint3f(1, 1, 1); // dist = (1,1,1) . (1,1,1).norm()
+    muon.LineIn().direction = HVector3f(0, 0, 1);
+    muon.LineOut().origin = HPoint3f(10, 10, 10); // dist = 10 * sqrt(3)
+    
+    projected = chamber.ProjectMuonEvent(muon);
+    // X_chosen = (1,1,1)
+    // X_proj = (1,1,1) - ((1,1,1) . N) * N   where N = (1,1,1)/sqrt(3)
+    // X_proj = (1,1,1) - (sqrt(3)) * (1,1,1)/sqrt(3) = (1,1,1) - (1,1,1) = (0,0,0)
+    expectedPos = HPoint3f(0, 0, 0);
+    
+    std::cout << "\nTest Case 3: Oblique plane" << std::endl;
+    std::cout << "Projected Position: " << projected.LineIn().origin.transpose() << std::endl;
+    std::cout << "Expected Position:  " << expectedPos.transpose() << std::endl;
+    
+    bool posOk3 = (projected.LineIn().origin - expectedPos).norm() < 1e-5;
+    TEST1(posOk3);
+
+    // Test Case 4: Transformed DetectorChamber
+    DetectorChamber chamber2;
+    chamber2.SetPosition(Vector3f(0, 0, 100)); // Move chamber to z=100
+    // chamber2.GetProjectionPlane has default origin (0,0,0) and direction (0,0,1)
+    // In world coordinates, this plane is at z = 100 + 0 = 100.
+    
+    muon.LineIn().origin = HPoint3f(50, 60, 50); // dist to world plane (z=100) is 50
+    muon.LineOut().origin = HPoint3f(50, 60, 200); // dist to world plane (z=100) is 100
+    
+    projected = chamber2.ProjectMuonEvent(muon);
+    expectedPos = HPoint3f(50, 60, 100);
+    
+    std::cout << "\nTest Case 4: Transformed DetectorChamber (active world matrix)" << std::endl;
+    std::cout << "Projected Position: " << projected.LineIn().origin.transpose() << std::endl;
+    std::cout << "Expected Position:  " << expectedPos.transpose() << std::endl;
+    
+    bool posOk4 = (projected.LineIn().origin - expectedPos).norm() < 1e-5;
+    TEST1(posOk4);
+
+    END_TESTING;
+}

src/HEP/Geant/ActionInitialization.cpp

@@ -0,0 +1,31 @@
+#include "ActionInitialization.hh"
+#include "EmitterPrimary.hh"
+#include "SteppingAction.hh"
+
+namespace uLib {
+namespace Geant {
+
+ActionInitialization::ActionInitialization(EmitterPrimary *emitter, SimulationContext *context)
+    : G4VUserActionInitialization(),
+      m_Emitter(emitter),
+      m_Context(context)
+{}
+
+ActionInitialization::~ActionInitialization() {}
+
+void ActionInitialization::BuildForMaster() const {}
+
+void ActionInitialization::Build() const {
+  if (m_Emitter) {
+    SetUserAction(m_Emitter->Clone());
+  } else {
+    SetUserAction(new EmitterPrimary());
+  }
+
+  SteppingAction *sa = new SteppingAction(m_Context);
+  SetUserAction(static_cast<G4UserSteppingAction*>(sa));
+  SetUserAction(static_cast<G4UserEventAction*>(sa));
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/ActionInitialization.hh

@@ -0,0 +1,28 @@
+#ifndef ActionInitialization_h
+#define ActionInitialization_h
+
+#include "G4VUserActionInitialization.hh"
+#include "SimulationContext.h"
+
+namespace uLib {
+namespace Geant {
+
+class EmitterPrimary;
+
+class ActionInitialization : public G4VUserActionInitialization {
+public:
+  ActionInitialization(EmitterPrimary *emitter, SimulationContext *context);
+  ~ActionInitialization();
+  
+  virtual void BuildForMaster() const override;
+  virtual void Build() const override;
+
+private:
+  EmitterPrimary    *m_Emitter;
+  SimulationContext *m_Context;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/CMakeLists.txt

@@ -0,0 +1,74 @@
+
+################################################################################
+##### HEP/Geant - Geant4 integration library ###################################
+################################################################################
+
+if(NOT Geant4_FOUND)
+    message(STATUS "Geant4 not found - skipping mutomGeant library")
+    return()
+endif()
+
+message(STATUS "Geant4 found: ${Geant4_VERSION}")
+include(${Geant4_USE_FILE})
+
+set(HEADERS
+    GeantEvent.h
+    Matter.h
+    Scene.h
+    Solid.h
+    DetectorConstruction.hh
+    PhysicsList.hh
+    ActionInitialization.hh
+    SteppingAction.hh
+    SimulationContext.h
+)
+
+set(SOURCES
+    Scene.cpp
+    Solid.cpp
+    EmitterPrimary.cpp
+    DetectorConstruction.cpp
+    PhysicsList.cpp
+    ActionInitialization.cpp
+    SteppingAction.cpp
+)
+
+set(libname ${PACKAGE_LIBPREFIX}Geant)
+set(ULIB_SHARED_LIBRARIES ${ULIB_SHARED_LIBRARIES} ${libname} PARENT_SCOPE)
+set(ULIB_SELECTED_MODULES ${ULIB_SELECTED_MODULES} Geant PARENT_SCOPE)
+
+add_library(${libname} SHARED ${SOURCES})
+set_target_properties(${libname} PROPERTIES
+                      VERSION ${PROJECT_VERSION}
+                      SOVERSION ${PROJECT_SOVERSION})
+
+target_include_directories(${libname} PRIVATE ${Geant4_INCLUDE_DIRS})
+
+target_link_libraries(${libname}
+    ${PACKAGE_LIBPREFIX}Core
+    ${PACKAGE_LIBPREFIX}Math
+    ${PACKAGE_LIBPREFIX}Detectors
+)
+
+# Filter Geant4 libraries to remove Qt-dependent ones
+set(Geant4_LIBS_FILTERED ${Geant4_LIBRARIES})
+if(Geant4_LIBS_FILTERED)
+    list(REMOVE_ITEM Geant4_LIBS_FILTERED Geant4::G4interfaces Geant4::G4OpenGL Geant4::G4visQt3D)
+endif()
+
+target_link_libraries(${libname}
+    ${Geant4_LIBS_FILTERED}
+)
+
+install(TARGETS ${libname}
+        EXPORT "uLibTargets"
+        RUNTIME DESTINATION ${INSTALL_BIN_DIR} COMPONENT bin
+        LIBRARY DESTINATION ${INSTALL_LIB_DIR} COMPONENT lib)
+
+install(FILES ${HEADERS}
+        DESTINATION ${INSTALL_INC_DIR}/HEP/Geant)
+
+if(BUILD_TESTING)
+  include(uLibTargetMacros)
+  add_subdirectory(testing)
+endif()

src/HEP/Geant/DetectorActionInitialization.cpp

@@ -0,0 +1,43 @@
+#include "DetectorActionInitialization.hh"
+#include "EmitterPrimary.hh"
+#include "DetectorSteppingAction.hh"
+
+namespace uLib {
+namespace Geant {
+
+DetectorActionInitialization::DetectorActionInitialization(EmitterPrimary *emitter,
+                                                           Vector<MuonEvent> *output,
+                                                           const Vector<HLine3f> &planes,
+                                                           int verbosity)
+    : G4VUserActionInitialization(),
+      m_Emitter(emitter),
+      m_Output(output),
+      m_Planes(planes),
+      m_Verbosity(verbosity)
+{}
+
+DetectorActionInitialization::~DetectorActionInitialization() {}
+
+void DetectorActionInitialization::BuildForMaster() const {}
+
+void DetectorActionInitialization::Build() const {
+  if (m_Verbosity > 0) {
+      std::cout << "[Geant] Worker thread Building actions... Output ptr: " << m_Output 
+                << ", Planes count: " << m_Planes.size() << std::endl;
+  }
+  if (m_Emitter) {
+    SetUserAction(m_Emitter->Clone());
+  } else {
+    SetUserAction(new EmitterPrimary());
+  }
+
+  if (m_Output) {
+    DetectorSteppingAction *sa = new DetectorSteppingAction(m_Output, m_Planes);
+    sa->SetVerbosity(m_Verbosity);
+    SetUserAction(static_cast<G4UserSteppingAction*>(sa));
+    SetUserAction(static_cast<G4UserEventAction*>(sa));
+  }
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/DetectorActionInitialization.hh

@@ -0,0 +1,35 @@
+#ifndef U_GEANT_DETECTORACTIONINITIALIZATION_HH
+#define U_GEANT_DETECTORACTIONINITIALIZATION_HH
+
+#include "G4VUserActionInitialization.hh"
+#include "Core/Vector.h"
+#include "HEP/Detectors/MuonEvent.h"
+#include "Math/Dense.h"
+
+namespace uLib {
+namespace Geant {
+
+class EmitterPrimary;
+
+class DetectorActionInitialization : public G4VUserActionInitialization {
+public:
+  DetectorActionInitialization(EmitterPrimary *emitter,
+                               Vector<MuonEvent> *output,
+                               const Vector<HLine3f> &planes,
+                               int verbosity = 0);
+  ~DetectorActionInitialization();
+
+  virtual void BuildForMaster() const override;
+  virtual void Build() const override;
+
+private:
+  EmitterPrimary *m_Emitter;
+  Vector<MuonEvent> *m_Output;
+  Vector<HLine3f> m_Planes;
+  int m_Verbosity;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/DetectorConstruction.cpp

@@ -0,0 +1,26 @@
+
+#include "DetectorConstruction.hh"
+
+#include "Core/Object.h"
+#include "Math/ContainerBox.h"
+
+#include "G4Box.hh"
+#include "G4LogicalVolume.hh"
+#include "G4NistManager.hh"
+#include "G4PVPlacement.hh"
+#include "G4RunManager.hh"
+#include "G4SystemOfUnits.hh"
+
+namespace uLib {
+namespace Geant {
+
+DetectorConstruction::DetectorConstruction(const char *name) : G4VUserDetectorConstruction() {}
+
+DetectorConstruction::~DetectorConstruction() {}
+
+G4VPhysicalVolume *DetectorConstruction::Construct() { return nullptr; }
+
+void DetectorConstruction::ConstructSDandField() {}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/DetectorConstruction.hh

@@ -0,0 +1,30 @@
+#ifndef DetectorConstruction_h
+#define DetectorConstruction_h
+
+#include "Core/Object.h"
+#include "G4VUserDetectorConstruction.hh"
+#include "globals.hh"
+
+class G4VPhysicalVolume;
+class G4LogicalVolume;
+
+namespace uLib {
+namespace Geant {
+
+class DetectorConstruction : public G4VUserDetectorConstruction {
+public:
+  DetectorConstruction(const char *name);
+  virtual ~DetectorConstruction();
+
+  virtual G4VPhysicalVolume *Construct();
+
+  virtual void ConstructSDandField();
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif
+
+
+

src/HEP/Geant/DetectorSteppingAction.cpp

@@ -0,0 +1,110 @@
+#include "DetectorSteppingAction.hh"
+#include <Geant4/G4Step.hh>
+#include <Geant4/G4Track.hh>
+#include <Geant4/G4Event.hh>
+#include <Geant4/G4SystemOfUnits.hh>
+#include <cmath>
+#include <mutex>
+#include <iostream>
+
+static std::mutex g_DetectorOutputMutex;
+
+namespace uLib {
+namespace Geant {
+
+DetectorSteppingAction::DetectorSteppingAction(Vector<MuonEvent> *output, const Vector<HLine3f> &planes)
+    : G4UserSteppingAction(),
+      G4UserEventAction(),
+      m_Output(output),
+      m_Planes(planes),
+      m_CrossCount(0),
+      m_Verbosity(1)
+{
+    // std::cout << "[Geant] SteppingAction created with " << m_Planes.size() << " planes." << std::endl;
+}
+
+DetectorSteppingAction::~DetectorSteppingAction() {}
+
+void DetectorSteppingAction::BeginOfEventAction(const G4Event* /*event*/) {
+    m_CrossCount = 0;
+    
+    // Initialize with NaN
+    float nan = std::numeric_limits<float>::quiet_NaN();
+    m_Current.LineIn().origin = HPoint3f(nan, nan, nan);
+    m_Current.LineIn().direction = HVector3f(nan, nan, nan);
+    m_Current.LineOut().origin = HPoint3f(nan, nan, nan);
+    m_Current.LineOut().direction = HVector3f(nan, nan, nan);
+    m_Current.Momentum() = nan;
+}
+
+void DetectorSteppingAction::EndOfEventAction(const G4Event* /*event*/) {
+    if (m_Output) {
+        std::lock_guard<std::mutex> lock(g_DetectorOutputMutex);
+        m_Output->push_back(m_Current);
+    }
+}
+
+void DetectorSteppingAction::UserSteppingAction(const G4Step *step) {
+  if (!step) return;
+  if (!m_Output) {
+      return;
+  }
+
+  const G4Track *track = step->GetTrack();
+  if (!track) return;
+
+  static size_t step_count = 0;
+  if (++step_count % 1000 == 0 && m_Verbosity > 0) {
+      std::cout << "[GeantMT] Processed " << step_count << " total steps across events." << std::endl;
+  }
+
+  // Only consider primary muons
+  if (track->GetParentID() != 0) return;
+
+  // Track the momentum at generation/first step if not set
+  if (std::isnan(m_Current.Momentum())) {
+      m_Current.Momentum() = static_cast<Scalarf>(track->GetMomentum().mag() / MeV);
+  }
+
+  G4ThreeVector p1 = step->GetPreStepPoint()->GetPosition();
+  G4ThreeVector p2 = step->GetPostStepPoint()->GetPosition();
+  G4ThreeVector dir_g4 = track->GetMomentumDirection();
+  
+  HPoint3f p1f(p1.x(), p1.y(), p1.z());
+  HPoint3f p2f(p2.x(), p2.y(), p2.z());
+  HVector3f dirf(dir_g4.x(), dir_g4.y(), dir_g4.z());
+
+  // Check intersection with each detector plane
+  for (const auto& plane : m_Planes) {
+      // Plane: origin=O, direction=N (normal)
+      HPoint3f O = plane.origin;
+      HVector3f N = plane.direction;
+
+      float d1 = (p1f - O).dot(N);
+      float d2 = (p2f - O).dot(N);
+
+      // Check if the step crossed the plane
+      if ((d1 > 0 && d2 <= 0) || (d1 < 0 && d2 >= 0)) {
+          // Intersection point t = d1 / (d1 - d2)
+          float t = d1 / (d1 - d2);
+          HPoint3f intersection = p1f + t * (p2f - p1f);
+
+          if (m_CrossCount == 0) {
+              m_Current.LineIn().origin = intersection;
+              m_Current.LineIn().direction = dirf;
+              m_CrossCount++;
+              if (m_Verbosity > 0) std::cout << "[GeantMT] Hit first plane at " << intersection.transpose() << std::endl;
+          } else if (m_CrossCount == 1) {
+              m_Current.LineOut().origin = intersection;
+              m_Current.LineOut().direction = dirf;
+              m_CrossCount++;
+              if (m_Verbosity > 0) std::cout << "[GeantMT] Hit second plane at " << intersection.transpose() << std::endl;
+          }
+          // We break to avoid crossing multiple planes in one infinitesimal step (unlikely but possible)
+          // Actually, we should check ALL planes.
+      }
+  }
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/DetectorSteppingAction.hh

@@ -0,0 +1,36 @@
+#ifndef U_GEANT_DETECTORSTEPPINGACTION_HH
+#define U_GEANT_DETECTORSTEPPINGACTION_HH
+
+#include "G4UserSteppingAction.hh"
+#include "G4UserEventAction.hh"
+#include "Core/Vector.h"
+#include "HEP/Detectors/MuonEvent.h"
+#include "HEP/Detectors/DetectorChamber.h"
+#include <mutex>
+
+namespace uLib {
+namespace Geant {
+
+class DetectorSteppingAction : public G4UserSteppingAction, public G4UserEventAction {
+public:
+  DetectorSteppingAction(Vector<MuonEvent> *output, const Vector<HLine3f> &planes);
+  virtual ~DetectorSteppingAction();
+
+  virtual void UserSteppingAction(const G4Step *step) override;
+  virtual void BeginOfEventAction(const G4Event *event) override;
+  virtual void EndOfEventAction(const G4Event *event) override;
+
+  void SetVerbosity(int level) { m_Verbosity = level; }
+
+private:
+  Vector<MuonEvent> *m_Output;
+  Vector<HLine3f> m_Planes; // World projection planes
+  MuonEvent m_Current;
+  int m_CrossCount = 0;
+  int m_Verbosity = 0;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/EmitterPrimary.cpp

@@ -0,0 +1,330 @@
+#include "EmitterPrimary.hh"
+
+#include "G4Box.hh"
+#include "G4LogicalVolume.hh"
+#include "G4LogicalVolumeStore.hh"
+#include "G4ParticleDefinition.hh"
+#include "G4ParticleGun.hh"
+#include "G4ParticleTable.hh"
+#include "G4RunManager.hh"
+#include "G4SystemOfUnits.hh"
+#include "Randomize.hh"
+
+#include "EcoMug.hh"
+#include "Math/Cylinder.h"
+
+
+namespace uLib {
+namespace Geant {
+
+EmitterPrimary::EmitterPrimary()
+    : G4VUserPrimaryGeneratorAction(), fParticleGun(nullptr) {
+  // Creiamo il ParticleGun impostandolo per sparare 1 particella alla volta
+  G4int n_particle = 1;
+  fParticleGun = new G4ParticleGun(n_particle);
+
+  // Otteniamo la tabella delle particelle di Geant4
+  G4ParticleTable *particleTable = G4ParticleTable::GetParticleTable();
+
+  // Cerchiamo il muone negativo (usa "mu+" per l'antimuone)
+  G4String particleName = "mu-";
+  G4ParticleDefinition *particle = particleTable->FindParticle(particleName);
+
+  // Configuriamo le proprietà iniziali della particella
+  fParticleGun->SetParticleDefinition(particle);
+
+  // Impostiamo l'energia cinetica a 1 GeV
+  fParticleGun->SetParticleEnergy(1.0 * GeV);
+
+  // Initial position and direction through AffineTransform
+  // 10m on Z axis, pointing towards origin
+  this->SetPosition(Vector3f(0, 0, 10000.0));
+  // Default orientation is identity (pointing along -Z if we rotate the puppet accordingly)
+  // But fParticleGun defaults are set here and overridden in GeneratePrimaries
+}
+
+EmitterPrimary::~EmitterPrimary() {
+  // Importante: liberare la memoria
+  delete fParticleGun;
+}
+
+void EmitterPrimary::GeneratePrimaries(G4Event *anEvent) {
+  // Use position and direction from AffineTransform
+  Vector3f pos = this->GetPosition();
+  // Assume default direction is along the -Z axis of the local frame
+  Vector4f dir4 = this->GetWorldMatrix() * Vector4f(0, 0, -1, 0);
+  Vector3f dir = dir4.head<3>().normalized();
+
+  fParticleGun->SetParticlePosition(G4ThreeVector(pos(0), pos(1), pos(2)));
+  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(dir(0), dir(1), dir(2)));
+
+  fParticleGun->GeneratePrimaryVertex(anEvent);
+}
+
+EmitterPrimary* EmitterPrimary::Clone() const {
+  auto* clone = new EmitterPrimary();
+  clone->SetMatrix(this->GetMatrix());
+  return clone;
+}
+
+// -------------------------------------------------------------------------- //
+// SkyPlaneEmitterPrimary using EcoMug
+
+SkyPlaneEmitterPrimary::SkyPlaneEmitterPrimary()
+    : EmitterPrimary(), m_EcoMug(new EcoMug()), m_Size(1000.0, 1000.0) {
+    // Initial configuration for EcoMug in sky mode
+    m_EcoMug->SetUseSky();
+    m_EcoMug->SetSkySize({m_Size(0)/1000.0, m_Size(1)/1000.0});
+}
+
+SkyPlaneEmitterPrimary::~SkyPlaneEmitterPrimary() {
+    delete m_EcoMug;
+}
+
+void SkyPlaneEmitterPrimary::SetSkySize(const uLib::Vector2f& size) {
+    m_Size = size;
+    // EcoMug units are in meters (m=1), Geant4 units are in mm.
+    m_EcoMug->SetSkySize({m_Size(0)/1000.0, m_Size(1)/1000.0});
+    this->Updated();
+}
+
+void SkyPlaneEmitterPrimary::SetPlane(const uLib::Vector3f& p0, const uLib::Vector3f& normal) {
+    this->SetPosition(p0);
+    // Orient the emitter so that local Z is the normal.
+    // This is useful for unconventional planes, though EcoMug sky is usually horizontal.
+    // If we want a truly 'sky' plane, it usually stays horizontal.
+    this->Updated();
+}
+
+void SkyPlaneEmitterPrimary::GeneratePrimaries(G4Event* anEvent) {
+    if (!m_EcoMug) return;
+    m_EcoMug->Generate();
+
+    // EcoMug position is relative to its internal sky center in meters.
+    // Our wrapper uses the AffineTransform for the overall positioning.
+    std::array<double, 3> pos_m = m_EcoMug->GetGenerationPosition();
+    G4ThreeVector local_pos(pos_m[0]*1000.0, pos_m[1]*1000.0, pos_m[2]*1000.0);
+
+    // EcoMug momentum (direction and magnitude in GeV/c)
+    double p_mag = m_EcoMug->GetGenerationMomentum();
+    double theta = m_EcoMug->GetGenerationTheta();
+    double phi = m_EcoMug->GetGenerationPhi();
+    
+    // EcoMug theta is generated in a way that PI means pointing down (-Z)
+    G4ThreeVector local_dir(
+        sin(theta) * cos(phi),
+        sin(theta) * sin(phi),
+        cos(theta)
+    );
+
+    // Transform local coordinates to world
+    Matrix4f world_mat = this->GetWorldMatrix();
+    Vector3f world_pos = (world_mat * Vector4f(local_pos.x(), local_pos.y(), local_pos.z(), 1.0)).head<3>();
+    Vector3f world_dir = (world_mat * Vector4f(local_dir.x(), local_dir.y(), local_dir.z(), 0.0)).head<3>().normalized();
+
+    // Set particle charge
+    G4ParticleTable *particleTable = G4ParticleTable::GetParticleTable();
+    G4String particleName = (m_EcoMug->GetCharge() > 0) ? "mu+" : "mu-";
+    fParticleGun->SetParticleDefinition(particleTable->FindParticle(particleName));
+
+    fParticleGun->SetParticlePosition(G4ThreeVector(world_pos(0), world_pos(1), world_pos(2)));
+    fParticleGun->SetParticleMomentumDirection(G4ThreeVector(world_dir(0), world_dir(1), world_dir(2)));
+    fParticleGun->SetParticleEnergy(p_mag * GeV);
+    
+    fParticleGun->GeneratePrimaryVertex(anEvent);
+}
+
+EmitterPrimary* SkyPlaneEmitterPrimary::Clone() const {
+    auto* clone = new SkyPlaneEmitterPrimary();
+    clone->SetSkySize(this->m_Size);
+    clone->SetMatrix(this->GetMatrix());
+    return clone;
+}
+ 
+// -------------------------------------------------------------------------- //
+// CylinderEmitterPrimary using EcoMug
+
+CylinderEmitterPrimary::CylinderEmitterPrimary()
+    : EmitterPrimary(), m_EcoMug(new EcoMug()), m_Radius(1000.0), m_Height(1000.0) {
+    m_EcoMug->SetUseCylinder();
+    m_EcoMug->SetCylinderRadius(m_Radius/1000.0);
+    m_EcoMug->SetCylinderHeight(m_Height/1000.0);
+    m_EcoMug->SetCylinderCenterPosition({0.0, 0.0, m_Height/2000.0});
+}
+
+CylinderEmitterPrimary::~CylinderEmitterPrimary() {
+    delete m_EcoMug;
+}
+
+void CylinderEmitterPrimary::SetRadius(float r) {
+    m_Radius = r;
+    m_EcoMug->SetCylinderRadius(m_Radius/1000.0);
+    this->Updated();
+}
+
+void CylinderEmitterPrimary::SetHeight(float h) {
+    m_Height = h;
+    m_EcoMug->SetCylinderHeight(m_Height/1000.0);
+    m_EcoMug->SetCylinderCenterPosition({0.0, 0.0, m_Height/2000.0});
+    this->Updated();
+}
+
+void CylinderEmitterPrimary::GeneratePrimaries(G4Event* anEvent) {
+    if (!m_EcoMug) return;
+    m_EcoMug->Generate();
+
+    std::array<double, 3> pos_m = m_EcoMug->GetGenerationPosition();
+    G4ThreeVector local_pos(pos_m[0]*1000.0, pos_m[1]*1000.0, pos_m[2]*1000.0);
+
+    double p_mag = m_EcoMug->GetGenerationMomentum();
+    double theta = m_EcoMug->GetGenerationTheta();
+    double phi = m_EcoMug->GetGenerationPhi();
+    
+    G4ThreeVector local_dir(
+        sin(theta) * cos(phi),
+        sin(theta) * sin(phi),
+        cos(theta)
+    );
+
+    Matrix4f world_mat = this->GetWorldMatrix();
+    Vector3f world_pos = (world_mat * Vector4f(local_pos.x(), local_pos.y(), local_pos.z(), 1.0)).head<3>();
+    Vector3f world_dir = (world_mat * Vector4f(local_dir.x(), local_dir.y(), local_dir.z(), 0.0)).head<3>().normalized();
+
+    G4ParticleTable *particleTable = G4ParticleTable::GetParticleTable();
+    G4String particleName = (m_EcoMug->GetCharge() > 0) ? "mu+" : "mu-";
+    fParticleGun->SetParticleDefinition(particleTable->FindParticle(particleName));
+
+    fParticleGun->SetParticlePosition(G4ThreeVector(world_pos(0), world_pos(1), world_pos(2)));
+    fParticleGun->SetParticleMomentumDirection(G4ThreeVector(world_dir(0), world_dir(1), world_dir(2)));
+    fParticleGun->SetParticleEnergy(p_mag * GeV);
+    
+    fParticleGun->GeneratePrimaryVertex(anEvent);
+}
+
+EmitterPrimary* CylinderEmitterPrimary::Clone() const {
+    auto* clone = new CylinderEmitterPrimary();
+    clone->SetRadius(this->m_Radius);
+    clone->SetHeight(this->m_Height);
+    clone->SetMatrix(this->GetMatrix());
+    return clone;
+}
+
+// -------------------------------------------------------------------------- //
+
+
+
+
+
+
+
+
+
+
+
+
+// -------------------------------------------------------------------------- //
+
+
+QuadMeshEmitterPrimary::QuadMeshEmitterPrimary()
+    : EmitterPrimary(), m_Mesh(nullptr), m_TotalArea(0.0) {
+}
+
+QuadMeshEmitterPrimary::~QuadMeshEmitterPrimary() {
+}
+
+void QuadMeshEmitterPrimary::SetMesh(uLib::QuadMesh *mesh) {
+  m_Mesh = mesh;
+  CalculateAreas();
+}
+
+void QuadMeshEmitterPrimary::CalculateAreas() {
+  if (!m_Mesh) return;
+  m_CumulativeAreas.clear();
+  m_TotalArea = 0.0;
+
+  const auto &quads = m_Mesh->Quads();
+
+  for (const auto &q : quads) {
+    uLib::Vector3f v0 = m_Mesh->GetPoint(q(0));
+    uLib::Vector3f v1 = m_Mesh->GetPoint(q(1));
+    uLib::Vector3f v2 = m_Mesh->GetPoint(q(2));
+    uLib::Vector3f v3 = m_Mesh->GetPoint(q(3));
+
+    double a1 = 0.5 * (v1 - v0).cross(v2 - v0).norm();
+    double a2 = 0.5 * (v2 - v0).cross(v3 - v0).norm();
+    m_TotalArea += (a1 + a2);
+    m_CumulativeAreas.push_back(m_TotalArea);
+  }
+}
+
+void QuadMeshEmitterPrimary::GeneratePrimaries(G4Event *anEvent) {
+  if (!m_Mesh || m_TotalArea <= 0.0) return;
+
+  // 1. Choose a quad
+  double r = G4UniformRand() * m_TotalArea;
+  auto it = std::lower_bound(m_CumulativeAreas.begin(), m_CumulativeAreas.end(), r);
+  int quadIdx = std::distance(m_CumulativeAreas.begin(), it);
+
+  const auto &q = m_Mesh->Quads()[quadIdx];
+  uLib::Vector3f v0 = m_Mesh->GetPoint(q(0));
+  uLib::Vector3f v1 = m_Mesh->GetPoint(q(1));
+  uLib::Vector3f v2 = m_Mesh->GetPoint(q(2));
+  uLib::Vector3f v3 = m_Mesh->GetPoint(q(3));
+
+  // 2. Choose a point on the quad
+  double a1 = 0.5 * (v1 - v0).cross(v2 - v0).norm();
+  double a2 = 0.5 * (v2 - v0).cross(v3 - v0).norm();
+  
+  G4ThreeVector pos;
+  uLib::Vector3f normal = m_Mesh->GetNormal(quadIdx);
+  
+  if (G4UniformRand() < a1 / (a1 + a2)) {
+    double u = G4UniformRand();
+    double v = G4UniformRand();
+    if (u + v > 1.0) { u = 1.0 - u; v = 1.0 - v; }
+    uLib::Vector3f p = v0 + u * (v1 - v0) + v * (v2 - v0);
+    pos.set(p(0), p(1), p(2));
+  } else {
+    double u = G4UniformRand();
+    double v = G4UniformRand();
+    if (u + v > 1.0) { u = 1.0 - u; v = 1.0 - v; }
+    uLib::Vector3f p = v0 + u * (v2 - v0) + v * (v3 - v0);
+    pos.set(p(0), p(1), p(2));
+  }
+
+  // 3. Choose a direction (Cosmic Muon: cos^2(theta))
+  G4ThreeVector dir;
+  bool accepted = false;
+  int tries = 0;
+  
+  while (!accepted && tries < 1000) {
+    tries++;
+    double cosTheta = std::pow(G4UniformRand(), 1.0/3.0);
+    double sinTheta = std::sqrt(1.0 - cosTheta * cosTheta);
+    double phi = 2.0 * M_PI * G4UniformRand();
+    
+    // Incoming from above (+Z towards -Z)
+    dir.set(sinTheta * std::cos(phi), sinTheta * std::sin(phi), -cosTheta);
+    
+    // Filtering: pointing on the same side of the face normal
+    if (dir.x() * normal(0) + dir.y() * normal(1) + dir.z() * normal(2) > 0) {
+      accepted = true;
+    }
+  }
+
+  if (accepted) {
+    fParticleGun->SetParticlePosition(pos);
+    fParticleGun->SetParticleMomentumDirection(dir);
+    // Keep energy from base class or set here if needed
+    fParticleGun->GeneratePrimaryVertex(anEvent);
+  }
+}
+EmitterPrimary* QuadMeshEmitterPrimary::Clone() const {
+  auto* clone = new QuadMeshEmitterPrimary();
+  if (m_Mesh) clone->SetMesh(m_Mesh);
+  clone->SetMatrix(this->GetMatrix());
+  return clone;
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/EmitterPrimary.hh

@@ -0,0 +1,127 @@
+#ifndef U_GEANT_EMITTERPRIMARY_HH
+#define U_GEANT_EMITTERPRIMARY_HH 1
+
+#include "G4VUserPrimaryGeneratorAction.hh"
+#include "globals.hh"
+
+
+namespace uLib {
+class QuadMesh;
+}
+
+class EcoMug;
+
+#include "Math/QuadMesh.h"
+#include "Core/Object.h"
+#include "Math/Transform.h"
+#include <vector> // Added for std::vector
+
+class G4ParticleGun;
+class G4Event;
+
+
+namespace uLib {
+namespace Geant {
+
+class EmitterPrimary : public G4VUserPrimaryGeneratorAction, public Object, public AffineTransform
+{
+  public:
+
+    virtual const char* GetClassName() const override { return "Geant.EmitterPrimary"; }
+
+    EmitterPrimary();    
+    virtual ~EmitterPrimary();
+
+    // Metodo principale chiamato all'inizio di ogni evento
+    virtual void GeneratePrimaries(G4Event*);         
+
+    virtual void Updated() override { ULIB_SIGNAL_EMIT(EmitterPrimary::Updated); }
+    
+    /// Create a clone of this emitter for multi-threading
+    virtual EmitterPrimary* Clone() const;
+
+  protected:
+    G4ParticleGun* fParticleGun; // Puntatore al cannone di particelle
+};
+
+class SkyPlaneEmitterPrimary : public EmitterPrimary
+{
+  public:
+
+    virtual const char* GetClassName() const override { return "Geant.SkyPlaneEmitterPrimary"; }
+
+    SkyPlaneEmitterPrimary();
+    virtual ~SkyPlaneEmitterPrimary();
+
+    virtual void GeneratePrimaries(G4Event*);
+
+    void SetPlane(const uLib::Vector3f& p0, const uLib::Vector3f& normal);
+    void SetSkySize(const uLib::Vector2f& size);
+    uLib::Vector2f GetSkySize() const { return m_Size; }
+    
+    virtual EmitterPrimary* Clone() const override;
+
+  private:
+    EcoMug* m_EcoMug;
+    uLib::Vector2f m_Size;
+};
+
+class CylinderEmitterPrimary : public EmitterPrimary
+{
+  public:
+
+    virtual const char* GetClassName() const override { return "Geant.CylinderEmitterPrimary"; }
+
+    CylinderEmitterPrimary();
+    virtual ~CylinderEmitterPrimary();
+
+    virtual void GeneratePrimaries(G4Event*);
+
+    void SetRadius(float r);
+    float GetRadius() const { return m_Radius; }
+    void SetHeight(float h);
+    float GetHeight() const { return m_Height; }
+    
+    virtual EmitterPrimary* Clone() const override;
+
+  private:
+    EcoMug* m_EcoMug;
+    float m_Radius;
+    float m_Height;
+};
+
+
+
+
+
+
+class QuadMeshEmitterPrimary : public EmitterPrimary
+{
+  public:
+
+    virtual const char* GetClassName() const override { return "Geant.QuadMeshEmitterPrimary"; }
+
+    QuadMeshEmitterPrimary();    
+    virtual ~QuadMeshEmitterPrimary();
+
+    // Metodo principale chiamato all'inizio di ogni evento
+    virtual void GeneratePrimaries(G4Event*);
+
+    void SetMesh(uLib::QuadMesh* mesh);
+    
+    virtual EmitterPrimary* Clone() const override;
+
+  private:
+    uLib::QuadMesh* m_Mesh;
+    std::vector<double> m_CumulativeAreas;
+    double m_TotalArea;
+
+    void CalculateAreas();
+};
+
+} // namespace Geant
+} // namespace uLib
+
+
+
+#endif

src/HEP/Geant/GeantEvent.cpp

@@ -0,0 +1,25 @@
+
+#include "HEP/Geant/GeantEvent.h"
+
+#include <cstddef>
+#include <iostream>
+
+using namespace uLib;
+
+void GeantEvent::Print(const size_t size) const {
+  std::cout << "Event " << m_EventID << ":" << std::endl;
+  std::cout << "  Momentum: " << m_Momentum << std::endl;
+  std::cout << "  GenVector: " << m_GenVector << std::endl;
+  std::cout << "  Path: " << std::endl;
+  
+  size_t limit = m_Path.size();
+  if(size > 0 && size < m_Path.size()) {
+    limit = size;
+  }
+  for (size_t i = 0; i < limit; ++i) {
+    std::cout << "    " << i << ": " << m_Path[i].m_Length << " " << m_Path[i].m_Momentum << " " << m_Path[i].m_Direction << " " << m_Path[i].m_SolidName << std::endl;
+  }
+  if (limit < m_Path.size()) {
+    std::cout << "    ... (" << m_Path.size() - limit << " more deltas)" << std::endl;
+  }
+}

src/HEP/Geant/GeantEvent.h

@@ -0,0 +1,96 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#ifndef U_GEANTEVENT_H
+#define U_GEANTEVENT_H
+
+#include "Core/Object.h"
+#include "Core/Types.h"
+#include "Core/Vector.h"
+#include "Math/Dense.h"
+
+#include <string>
+
+namespace uLib {
+namespace Geant {
+
+// Forward declaration for friend access
+class SteppingAction;
+
+///////////////////////////////////////////////////////////////////////////////
+/// GeantEvent — output of a Geant4 simulation run.
+///
+/// m_Momentum and m_GenVector are set from the EmitterPrimary at generation.
+/// During simulation, each scattering interaction deposits a Delta in m_Path,
+/// recording the change of momentum and direction at each step boundary.
+///////////////////////////////////////////////////////////////////////////////
+
+class GeantEvent : public Object {
+  
+public:
+
+  virtual const char* GetClassName() const override { return "Geant.GeantEvent"; }
+
+  /// A single interaction step along the muon path.
+  struct Delta {
+    Scalarf     m_Length;     ///< step length through the solid
+    Scalarf     m_Momentum;  ///< momentum magnitude at this step
+    HVector3f   m_Direction; ///< direction after scattering
+    std::string m_SolidName; ///< name of the solid where interaction occurred
+
+    uLibGetMacro(Length, Scalarf)
+    uLibGetMacro(Momentum, Scalarf)
+    uLibConstRefMacro(Direction, HVector3f)
+    uLibConstRefMacro(SolidName, std::string)
+
+    Delta() : m_Length(0), m_Momentum(0), m_Direction(HVector3f::Zero()) {}
+  };
+
+  // --- Read-only accessors (public) --- //
+  uLibGetMacro(EventID, Id_t) 
+  uLibGetMacro(Momentum, Scalarf)
+  uLibConstRefMacro(GenVector, HLine3f)
+  uLibConstRefMacro(Path, Vector<Delta>)
+
+  void Print(const size_t size = 10) const;
+
+
+private:
+  Id_t m_EventID;
+  Scalarf m_Momentum;
+  HLine3f m_GenVector;
+  Vector<Delta> m_Path;
+
+public:
+  GeantEvent() : m_EventID(0), m_Momentum(0), m_GenVector(HLine3f()), m_Path() {}
+
+  // SteppingAction can populate the private fields during simulation
+  friend class SteppingAction;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif // U_GEANTEVENT_H

src/HEP/Geant/Matter.h

@@ -34,6 +34,7 @@ class G4Element;
 class G4Material;
 
 namespace uLib {
+namespace Geant {
 
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -58,6 +59,8 @@ private:
 class Material : public Object {
 public:
 
+    virtual const char* GetClassName() const override { return "Geant.Material"; }
+
     uLibRefMacro(G4Data,G4Material *)
 private:
     G4Material *m_G4Data;
@@ -65,6 +68,7 @@ private:
 
 
 
+}
 }
 
 

src/HEP/Geant/PhysicsList.cpp

@@ -0,0 +1,28 @@
+#include "PhysicsList.hh"
+
+#include "G4DecayPhysics.hh"
+#include "G4EmStandardPhysics.hh"
+#include "G4RadioactiveDecayPhysics.hh"
+
+namespace uLib {
+namespace Geant {
+
+PhysicsList::PhysicsList() : G4VModularPhysicsList() {
+  SetVerboseLevel(1);
+
+  // Default physics
+  RegisterPhysics(new G4DecayPhysics());
+
+  // EM physics
+  RegisterPhysics(new G4EmStandardPhysics());
+
+  // Radioactive decay
+  RegisterPhysics(new G4RadioactiveDecayPhysics());
+}
+
+PhysicsList::~PhysicsList() {}
+
+void PhysicsList::SetCuts() { G4VModularPhysicsList::SetCuts(); }
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/PhysicsList.hh

@@ -0,0 +1,20 @@
+#ifndef PhysicsList_h
+#define PhysicsList_h
+
+#include "G4VModularPhysicsList.hh"
+
+namespace uLib {
+namespace Geant {
+
+class PhysicsList : public G4VModularPhysicsList {
+public:
+  PhysicsList();
+  virtual ~PhysicsList();
+
+  virtual void SetCuts();
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/Scene.cpp

@@ -0,0 +1,160 @@
+#include <Geant4/G4Box.hh>
+#include <Geant4/G4LogicalVolume.hh>
+#include <Geant4/G4Material.hh>
+#include <Geant4/G4NistManager.hh>
+#include <Geant4/G4PVPlacement.hh>
+#include <Geant4/G4RunManager.hh>
+#include <Geant4/G4RunManagerFactory.hh>
+#include <Geant4/G4SystemOfUnits.hh>
+#include <Geant4/G4VPhysicalVolume.hh>
+
+#include "Core/Vector.h"
+#include "HEP/Geant/DetectorConstruction.hh"
+#include "Math/ContainerBox.h"
+#include "Math/Dense.h"
+#include "Solid.h"
+
+#include "Scene.h"
+#include "PhysicsList.hh"
+#include "ActionInitialization.hh"
+#include "SimulationContext.h"
+#include "HEP/Detectors/DetectorChamber.h"
+
+namespace uLib {
+namespace Geant {
+
+class SceneDetectorConstruction : public DetectorConstruction {
+public:
+  SceneDetectorConstruction(class SceneImpl *owner) : DetectorConstruction("Scene"), m_Owner(owner) {}
+  G4VPhysicalVolume *Construct() override;
+private:
+  class SceneImpl *m_Owner;
+};
+
+static void CheckGeant4Environment() {
+  static bool checked = false;
+  if (checked) return;
+  checked = true;
+  if (!std::getenv("G4ENSDFSTATEDATA")) {
+    std::cerr << "********************************************************" << std::endl;
+    std::cerr << " WARNING: Geant4 environment variables are not set!" << std::endl;
+    std::cerr << " Please activate the environment before running:" << std::endl;
+    std::cerr << "   micromamba activate mutom" << std::endl;
+    std::cerr << "********************************************************" << std::endl;
+  }
+}
+
+class SceneImpl {
+public:
+  SceneImpl() : m_RunManager(G4RunManagerFactory::CreateRunManager(G4RunManagerType::Default)),
+                m_Emitter(nullptr),
+                m_InitCalled(false) {
+    m_RunManager->SetUserInitialization(new PhysicsList);
+  }
+
+  ~SceneImpl() { 
+    if (m_RunManager) delete m_RunManager; 
+    // m_World deletion is handled in Scene destructor or here
+  }
+
+  void Initialize() {
+    if (m_InitCalled) return;
+    
+    m_RunManager->SetUserInitialization(new SceneDetectorConstruction(this));
+    m_RunManager->SetUserInitialization(new ActionInitialization(m_Emitter, &m_Context));
+    
+    m_RunManager->Initialize();
+    m_InitCalled = true;
+  }
+
+  Vector<Solid *> m_Solids;
+  Solid *m_World = nullptr;
+  ContainerBox m_WorldBox;
+  G4RunManager *m_RunManager;
+  EmitterPrimary *m_Emitter;
+  SimulationContext m_Context;
+  bool m_InitCalled;
+};
+
+G4VPhysicalVolume *SceneDetectorConstruction::Construct() {
+  return m_Owner->m_World->GetPhysical();
+}
+
+Scene::Scene() {
+  CheckGeant4Environment();
+  d = new SceneImpl();
+}
+
+Scene::~Scene() {
+    // Delete solids
+    for(auto s : d->m_Solids) delete s; 
+    delete d;
+}
+
+void Scene::AddSolid(Solid *solid, Solid *parent) { 
+  d->m_Solids.push_back(solid);
+  if (!d->m_World) {
+    d->m_World = solid;
+  } else {
+    solid->SetParent(parent ? parent : d->m_World);
+  }
+}
+
+const Solid* Scene::GetWorld() const { return d->m_World; }
+ContainerBox* Scene::GetWorldBox() const { return &d->m_WorldBox; }
+
+void Scene::ConstructWorldBox(const Vector3f &size, const char *material) {
+  d->m_WorldBox.Scale(size);
+  d->m_WorldBox.SetPosition(-size/2.0f);
+
+  if (!d->m_World) {
+    d->m_World = new Solid("World");
+    d->m_World->SetNistMaterial(material);
+    AddSolid(d->m_World);
+  }
+
+  G4Box *solidWorld = new G4Box("World", 0.5 * size(0), 0.5 * size(1), 0.5 * size(2));
+  G4LogicalVolume *logicWorld = new G4LogicalVolume(solidWorld, d->m_World->GetMaterial(), d->m_World->GetName());
+  d->m_World->SetLogical(logicWorld);
+  
+  G4PVPlacement *physWorld = new G4PVPlacement(nullptr, G4ThreeVector(0, 0, 0), logicWorld, d->m_World->GetName(), 0, false, 0, true);
+  d->m_World->SetPhysical(physWorld);
+}
+
+void Scene::SetEmitter(EmitterPrimary *emitter) { d->m_Emitter = emitter; }
+void Scene::Initialize() { d->Initialize(); }
+void Scene::SetVerbosity(int level) {
+  d->m_Context.verbosity = level;
+  if (d->m_RunManager) d->m_RunManager->SetVerboseLevel(level);
+}
+
+void Scene::RunSimulation(int nEvents, Vector<GeantEvent> &results) {
+  d->Initialize(); // Ensure initialized
+  d->m_Context.mode = SimulationMode::DETAILED;
+  d->m_Context.outputGeant = &results;
+  d->m_Context.outputMuon = nullptr;
+  
+  d->m_RunManager->BeamOn(nEvents);
+}
+
+void Scene::RunDetectorSimulation(int nEvents, Vector<MuonEvent> &results) {
+  d->Initialize(); // Ensure initialized
+  d->m_Context.mode = SimulationMode::DETECTOR;
+  d->m_Context.outputGeant = nullptr;
+  d->m_Context.outputMuon = &results;
+  
+  // Find detector planes
+  d->m_Context.detectorPlanes.clear();
+  for (Solid* s : d->m_Solids) {
+      if (BoxSolid* bs = dynamic_cast<BoxSolid*>(s)) {
+          if (DetectorChamber* dc = dynamic_cast<DetectorChamber*>(bs->GetObject())) {
+              d->m_Context.detectorPlanes.push_back(dc->GetWorldProjectionPlane());
+          }
+      }
+  }
+
+  d->m_RunManager->BeamOn(nEvents);
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/Scene.h

@@ -0,0 +1,84 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#ifndef SCENE_H
+#define SCENE_H
+
+
+
+#include "Core/Object.h"
+#include "Core/Vector.h"
+#include "Solid.h"
+#include "GeantEvent.h"
+#include "HEP/Detectors/MuonEvent.h"
+
+class G4VPhysicalVolume;
+
+namespace uLib {
+namespace Geant {
+
+class EmitterPrimary;
+
+class Scene : public Object {
+public:
+
+  virtual const char* GetClassName() const override { return "Geant.Scene"; }
+
+  Scene();
+  ~Scene();
+
+  void AddSolid(Solid *solid, Solid *parent = nullptr);
+  
+  void ConstructWorldBox(const Vector3f &size, const char *material);
+
+  /// Get the world box
+  const Solid* GetWorld() const;
+  
+  ContainerBox* GetWorldBox() const;
+
+  /// Set the primary generator (emitter) for the simulation.
+  /// The Scene does NOT take ownership of the emitter.
+  void SetEmitter(EmitterPrimary *emitter);
+
+  /// Initialize the Geant4 run manager with detector, physics, and action.
+  void Initialize();
+  
+  /// Set the verbosity level for console output (default 0)
+  void SetVerbosity(int level);
+
+  /// Run the simulation for nEvents muons.
+  /// Results are appended to the provided vector.
+  void RunSimulation(int nEvents, Vector<GeantEvent> &results);
+
+  /// Specialized detector simulation trackingMuonEvent line crossings.
+  void RunDetectorSimulation(int nEvents, Vector<MuonEvent> &results);
+
+private:
+  class SceneImpl *d;
+};
+
+} // namespace Geant
+} // namespace uLib
+#endif // SCENE_H

src/HEP/Geant/SimulationContext.h

@@ -0,0 +1,30 @@
+#ifndef U_GEANT_SIMULATIONCONTEXT_H
+#define U_GEANT_SIMULATIONCONTEXT_H
+
+#include "Core/Vector.h"
+#include "GeantEvent.h"
+#include "HEP/Detectors/MuonEvent.h"
+#include "Math/Dense.h"
+#include <mutex>
+
+namespace uLib {
+namespace Geant {
+
+enum class SimulationMode {
+    DETAILED,
+    DETECTOR
+};
+
+struct SimulationContext {
+    SimulationMode mode = SimulationMode::DETAILED;
+    Vector<GeantEvent> *outputGeant = nullptr;
+    Vector<MuonEvent> *outputMuon = nullptr;
+    Vector<HLine3f> detectorPlanes;
+    int verbosity = 0;
+    std::mutex outputMutex;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/Solid.cpp

@@ -0,0 +1,208 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+// G4 Solid //
+#include <CLHEP/Units/SystemOfUnits.h>
+#include <Geant4/G4LogicalVolume.hh>
+#include <Geant4/G4Material.hh>
+#include <Geant4/G4NistManager.hh>
+
+// Tessellated solid //
+#include <Geant4/G4TessellatedSolid.hh>
+#include <Geant4/G4ThreeVector.hh>
+#include <Geant4/G4TriangularFacet.hh>
+#include <Geant4/G4Box.hh>
+#include <Geant4/G4PVPlacement.hh>
+
+
+#include "Math/Dense.h"
+#include "Math/Transform.h"
+
+#include "Solid.h"
+
+namespace uLib {
+namespace Geant {
+
+class DetectorsSolidImpl {
+public:
+  static G4ThreeVector getG4Vector3f(const Vector3f &vector) {
+    return G4ThreeVector(vector(0), vector(1), vector(2));
+  }
+
+  
+};
+
+Solid::Solid()
+    : m_Name("unnamed_solid"), m_Material(NULL), m_Logical(NULL), m_Physical(NULL), 
+      m_Position(new G4ThreeVector(0,0,0)), m_Rotation(NULL) {}
+
+Solid::Solid(const char *name)
+    : m_Name(name), m_Material(NULL), m_Logical(NULL), m_Physical(NULL), 
+      m_Position(new G4ThreeVector(0,0,0)), m_Rotation(NULL) {}
+
+Solid::~Solid() {
+  if (m_Position) delete m_Position;
+  if (m_Rotation) delete m_Rotation;
+}
+
+void Solid::SetNistMaterial(const char *name) {
+  G4NistManager *nist = G4NistManager::Instance();
+  G4Material *mat = nist->FindOrBuildMaterial(name);
+  if (mat) SetMaterial(mat);
+}
+
+void Solid::SetMaterial(G4Material *material) {
+  if (material) {
+    m_Material = material;
+    if (m_Logical) {
+      m_Logical->SetMaterial(material);
+    } else if (GetG4Solid()) {
+      m_Logical = new G4LogicalVolume(GetG4Solid(), m_Material, GetName());
+    }
+  }
+}
+
+void Solid::SetTransform(Matrix4f transform) {
+  uLib::AffineTransform t;
+  t.SetMatrix(transform);
+
+    // 2. Extract position and rotation for Geant4
+    Vector3f pos = t.GetPosition();
+    if (!m_Position) m_Position = new G4ThreeVector();
+    *m_Position = G4ThreeVector(pos(0), pos(1), pos(2));
+
+    // Create a G4 rotation matrix from the 4x4 matrix
+    Matrix3f m = t.GetRotation();
+    if (!m_Rotation) m_Rotation = new G4RotationMatrix();
+    m_Rotation->set(G4ThreeVector(m(0,0), m(1,0), m(2,0)), 
+                    G4ThreeVector(m(0,1), m(1,1), m(2,1)), 
+                    G4ThreeVector(m(0,2), m(1,2), m(2,2))); 
+
+    // 3. If object is already placed, update its transformation
+    if (m_Physical) {
+        m_Physical->SetTranslation(*m_Position);
+        m_Physical->SetRotation(m_Rotation);
+    }
+}
+
+void Solid::SetParent(Solid *parent) {
+  if (!m_Logical) {
+    std::cerr << "logical volume not created for solid " << GetName() << std::endl;
+    return;
+  }
+
+  if(m_Physical) {
+    std::cerr << "physical volume already created for solid " << GetName() << std::endl;
+    return;
+  }
+
+  G4LogicalVolume* parentLogical = nullptr;
+  if (parent) {
+    parentLogical = parent->GetLogical();
+    if (!parentLogical) {
+      std::cerr << "parent logical volume not created for solid " << parent->GetName() << std::endl;
+      return;
+    }
+  }
+
+  // G4PVPlacement
+  m_Physical = new G4PVPlacement(
+      m_Rotation,            // Rotation
+      *m_Position,           // Position (translation) inside the parent
+      m_Logical,             // The logical volume of this solid (the child)
+      GetName(),             // Name of the physical volume
+      parentLogical,         // The logical volume of the parent (nullptr if it's the World volume)
+      false,                 // Boolean operations (usually false)
+      0,                     // Copy number
+      true                   // Check overlaps (useful to enable in debug phase)
+  );
+}
+
+
+
+
+
+
+
+TessellatedSolid::TessellatedSolid(const char *name)
+    : BaseClass(name), m_Solid(new G4TessellatedSolid(name)) {
+    }
+
+void TessellatedSolid::SetMesh(TriangleMesh &mesh) {
+  G4TessellatedSolid *ts = this->m_Solid;
+  for (int i = 0; i < mesh.Triangles().size(); ++i) {
+    const Vector3i &trg = mesh.Triangles().at(i);
+    G4TriangularFacet *facet = new G4TriangularFacet(
+        DetectorsSolidImpl::getG4Vector3f(mesh.Points().at(trg(0))),
+        DetectorsSolidImpl::getG4Vector3f(mesh.Points().at(trg(1))),
+        DetectorsSolidImpl::getG4Vector3f(mesh.Points().at(trg(2))), ABSOLUTE);
+    ts->AddFacet((G4VFacet *)facet);
+  }
+  if (this->m_Logical) {
+    this->m_Logical->SetSolid(ts);
+  }
+}
+
+
+
+
+
+BoxSolid::BoxSolid(const char *name, ContainerBox *box) : BaseClass(name) {
+  m_Solid = new G4Box(name, 1,1,1);
+  m_Object = box;
+  Object::connect(box, &ContainerBox::Updated, this, &BoxSolid::Update);
+  if (m_Logical) {
+    m_Logical->SetSolid(m_Solid);
+  }
+  Update();
+}
+
+void BoxSolid::Update() {
+  if (m_Object) {
+    Vector3f size = m_Object->GetSize();
+    m_Solid->SetXHalfLength(size(0) * 0.5);
+    m_Solid->SetYHalfLength(size(1) * 0.5);
+    m_Solid->SetZHalfLength(size(2) * 0.5);
+    
+    // Geant4 placement is relative to center. uLib Box is anchored at corner.
+    // 1. Get position and rotation (clean, without scale)
+    Vector3f pos = m_Object->GetPosition();
+    Matrix3f rot = m_Object->GetRotation();
+
+    // 2. Center = Corner + Rotation * (Half-Size)
+    // We must rotate the offset vector because uLib box can be rotated.
+    Vector3f center = pos + rot * (size * 0.5);
+
+    uLib::AffineTransform t;
+    t.SetPosition(center);
+    t.SetRotation(rot);
+    
+    this->SetTransform(t.GetMatrix());
+  }
+}
+
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/Solid.h

@@ -0,0 +1,132 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under  the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#ifndef SOLID_H
+#define SOLID_H
+
+#include "Core/Object.h"
+#include "Geant/Matter.h"
+#include <Geant4/G4LogicalVolume.hh>
+#include "Math/ContainerBox.h"
+#include "Math/Dense.h"
+#include "Math/TriangleMesh.h"
+
+class G4Material;
+class G4LogicalVolume;
+class G4TessellatedSolid;
+class G4Box;
+
+namespace uLib {
+namespace Geant {
+
+class Solid : public Object {
+public:
+
+  virtual const char* GetClassName() const override { return "Geant.Solid"; }
+
+  Solid();
+  Solid(const char *name);
+  virtual ~Solid();
+
+  void SetNistMaterial(const char *name);
+  void SetMaterial(G4Material *material);
+  void SetSizeUnit(const char *unit);
+  // Implementiamo SetParent qui, per tutti.
+  virtual void SetParent(Solid *parent); 
+
+  // Setters per la posizione (necessari per il piazzamento)
+  void SetTransform(Matrix4f transform); 
+
+  uLibGetMacro(Material, G4Material *) 
+  uLibGetSetMacro(Logical, G4LogicalVolume *)
+  uLibGetSetMacro(Physical, G4VPhysicalVolume *)
+
+  virtual G4VSolid* GetG4Solid() const { return nullptr; }
+
+  inline const char *GetName() const { 
+    return m_Logical ? m_Logical->GetName().c_str() : m_Name.c_str(); 
+  }
+
+protected:
+
+  std::string m_Name;
+  G4Material *m_Material;
+  G4LogicalVolume *m_Logical;
+  G4VPhysicalVolume *m_Physical; // <-- Memorizza l'oggetto posizionato
+  G4ThreeVector *m_Position;      // <-- Offset rispetto al centro del padre
+  G4RotationMatrix* m_Rotation;  // <-- Rotazione rispetto al padre
+};
+
+
+
+
+
+class TessellatedSolid : public Solid {
+  typedef Solid BaseClass;
+public:
+
+  virtual const char* GetClassName() const override { return "Geant.TessellatedSolid"; }
+
+  TessellatedSolid(const char *name);
+  void SetMesh(TriangleMesh &mesh);
+  uLibGetMacro(Solid, G4TessellatedSolid *) 
+  virtual G4VSolid* GetG4Solid() const override { return (G4VSolid*)m_Solid; }
+
+public slots:
+  void Update();
+
+private : 
+  G4TessellatedSolid *m_Solid;
+};
+
+
+
+
+
+
+class BoxSolid : public Solid {
+  typedef Solid BaseClass;
+
+public:
+
+  virtual const char* GetClassName() const override { return "Geant.BoxSolid"; }
+
+  BoxSolid(const char *name, ContainerBox *box);
+  virtual G4VSolid* GetG4Solid() const override { return (G4VSolid*)m_Solid; }
+  
+  ContainerBox* GetObject() const { return m_Object; }
+
+public slots:
+  void Update();
+
+private:
+  ContainerBox *m_Object;
+  G4Box *m_Solid;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif // SOLID_H

src/HEP/Geant/SteppingAction.cpp

@@ -0,0 +1,125 @@
+#include "SteppingAction.hh"
+#include <Geant4/G4Step.hh>
+#include <Geant4/G4Track.hh>
+#include <Geant4/G4Event.hh>
+#include <Geant4/G4SystemOfUnits.hh>
+#include <set>
+#include <iostream>
+#include <mutex>
+#include <cmath>
+
+namespace uLib {
+namespace Geant {
+
+SteppingAction::SteppingAction(SimulationContext *context)
+    : G4UserSteppingAction(),
+      G4UserEventAction(),
+      m_Context(context),
+      m_Verbosity(0)
+{}
+
+SteppingAction::~SteppingAction() {}
+
+void SteppingAction::BeginOfEventAction(const G4Event *event) {
+  if (!event || !m_Context) return;
+
+  if (m_Context->mode == SimulationMode::DETAILED) {
+      m_CurrentGeant = GeantEvent();
+      m_CurrentGeant.m_EventID = static_cast<Id_t>(event->GetEventID());
+
+      if (event->GetNumberOfPrimaryVertex() > 0) {
+        G4PrimaryVertex *vtx = event->GetPrimaryVertex(0);
+        G4ThreeVector pos = vtx->GetPosition();
+        m_CurrentGeant.m_GenVector.origin = HPoint3f(pos.x(), pos.y(), pos.z());
+
+        if (vtx->GetNumberOfParticle() > 0) {
+          G4PrimaryParticle *prim = vtx->GetPrimary(0);
+          G4ThreeVector mom = prim->GetMomentumDirection();
+          m_CurrentGeant.m_GenVector.direction = HVector3f(mom.x(), mom.y(), mom.z());
+          m_CurrentGeant.m_Momentum = static_cast<Scalarf>(prim->GetTotalMomentum() / MeV);
+        }
+      }
+  } else {
+      // Detector mode
+      m_MuonCrossCount = 0;
+      float nan = std::numeric_limits<float>::quiet_NaN();
+      m_CurrentMuon.LineIn().origin = HPoint3f(nan, nan, nan);
+      m_CurrentMuon.LineIn().direction = HVector3f(nan, nan, nan);
+      m_CurrentMuon.LineOut().origin = HPoint3f(nan, nan, nan);
+      m_CurrentMuon.LineOut().direction = HVector3f(nan, nan, nan);
+      m_CurrentMuon.Momentum() = nan;
+  }
+}
+
+void SteppingAction::EndOfEventAction(const G4Event *event) {
+  if (!m_Context) return;
+
+  if (m_Context->mode == SimulationMode::DETAILED && m_Context->outputGeant) {
+    if (!m_CurrentGeant.m_Path.empty()) {
+        std::lock_guard<std::mutex> lock(m_Context->outputMutex);
+        m_Context->outputGeant->push_back(m_CurrentGeant);
+    }
+  } else if (m_Context->mode == SimulationMode::DETECTOR && m_Context->outputMuon) {
+    // In detector mode, we always push the event (to keep indexing consistent) 
+    // or only if hit? User requested "all muon event line in and out ar at first set to nan".
+    // So we push everything.
+    std::lock_guard<std::mutex> lock(m_Context->outputMutex);
+    m_Context->outputMuon->push_back(m_CurrentMuon);
+  }
+}
+
+void SteppingAction::UserSteppingAction(const G4Step *step) {
+  if (!step || !m_Context) return;
+
+  const G4Track *track = step->GetTrack();
+  if (!track || track->GetParentID() != 0) return;
+
+  if (m_Context->mode == SimulationMode::DETAILED) {
+      GeantEvent::Delta delta;
+      delta.m_Length = static_cast<Scalarf>(step->GetStepLength() / mm);
+      delta.m_Momentum = static_cast<Scalarf>(track->GetMomentum().mag() / MeV);
+      G4ThreeVector dir = track->GetMomentumDirection();
+      delta.m_Direction = HVector3f(dir.x(), dir.y(), dir.z());
+
+      if (track->GetVolume()) {
+          delta.m_SolidName = track->GetVolume()->GetName();
+      }
+      m_CurrentGeant.m_Path.push_back(delta);
+  } else {
+      // Detector Mode
+      if (std::isnan(m_CurrentMuon.Momentum())) {
+          m_CurrentMuon.Momentum() = static_cast<Scalarf>(track->GetMomentum().mag() / MeV);
+      }
+
+      G4ThreeVector p1 = step->GetPreStepPoint()->GetPosition();
+      G4ThreeVector p2 = step->GetPostStepPoint()->GetPosition();
+      G4ThreeVector dir_g4 = track->GetMomentumDirection();
+      
+      HPoint3f p1f(p1.x(), p1.y(), p1.z());
+      HPoint3f p2f(p2.x(), p2.y(), p2.z());
+      HVector3f dirf(dir_g4.x(), dir_g4.y(), dir_g4.z());
+
+      for (const auto& plane : m_Context->detectorPlanes) {
+          float d1 = (p1f - plane.origin).dot(plane.direction);
+          float d2 = (p2f - plane.origin).dot(plane.direction);
+
+          if ((d1 > 0 && d2 <= 0) || (d1 < 0 && d2 >= 0)) {
+              float t = d1 / (d1 - d2);
+              HPoint3f intersection = p1f + t * (p2f - p1f);
+
+              if (m_MuonCrossCount == 0) {
+                  m_CurrentMuon.LineIn().origin = intersection;
+                  m_CurrentMuon.LineIn().direction = dirf;
+                  m_MuonCrossCount++;
+              } else if (m_MuonCrossCount == 1) {
+                  m_CurrentMuon.LineOut().origin = intersection;
+                  m_CurrentMuon.LineOut().direction = dirf;
+                  m_MuonCrossCount++;
+              }
+          }
+      }
+  }
+}
+
+} // namespace Geant
+} // namespace uLib

src/HEP/Geant/SteppingAction.hh

@@ -0,0 +1,37 @@
+#ifndef U_GEANT_STEPPINGACTION_HH
+#define U_GEANT_STEPPINGACTION_HH
+
+#include "G4UserSteppingAction.hh"
+#include "G4UserEventAction.hh"
+#include "Core/Vector.h"
+#include "GeantEvent.h"
+#include "HEP/Detectors/MuonEvent.h"
+#include "SimulationContext.h"
+
+namespace uLib {
+namespace Geant {
+
+/// SteppingAction collects scattering data at each Geant4 step.
+class SteppingAction : public G4UserSteppingAction, public G4UserEventAction {
+public:
+  SteppingAction(SimulationContext *context);
+  virtual ~SteppingAction();
+
+  virtual void UserSteppingAction(const G4Step *step) override;
+  virtual void BeginOfEventAction(const G4Event *event) override;
+  virtual void EndOfEventAction(const G4Event *event) override;
+  
+  void SetVerbosity(int level) { m_Verbosity = level; }
+
+private:
+  SimulationContext *m_Context;
+  GeantEvent         m_CurrentGeant;
+  MuonEvent          m_CurrentMuon;
+  int                m_MuonCrossCount = 0;
+  int                m_Verbosity = 0;
+};
+
+} // namespace Geant
+} // namespace uLib
+
+#endif

src/HEP/Geant/testing/ActionInitialization.cpp

@@ -0,0 +1,23 @@
+#include "HEP/Geant/ActionInitialization.hh" // Il file appena creato
+#include "G4RunManagerFactory.hh"            // Per il RunManager moderno
+// ... altri include (DetectorConstruction, PhysicsList, ecc.)
+
+int main(int argc, char **argv) {
+  // Creazione del Run Manager
+  auto *runManager = G4RunManagerFactory::CreateRunManager();
+
+  // 1. Inizializzazione della Geometria
+  // runManager->SetUserInitialization(new DetectorConstruction());
+
+  // 2. Inizializzazione della Fisica
+  // runManager->SetUserInitialization(new PhysicsList());
+
+  // 3. INIZIALIZZAZIONE DELLE AZIONI (Il nostro generatore!)
+  runManager->SetUserInitialization(new uLib::Geant::ActionInitialization(nullptr, nullptr));
+
+  // ... Inizializzazione del kernel ( runManager->Initialize(); ), UI manager,
+  // vis manager, ecc.
+
+  delete runManager;
+  return 0;
+}

src/HEP/Geant/testing/CMakeLists.txt

@@ -0,0 +1,16 @@
+# TESTS
+set(TESTS
+       SolidTest
+       EventTest
+       GeantApp
+       ActionInitialization
+       SkyPlaneEmitterTest
+)
+
+set(LIBRARIES
+       ${PACKAGE_LIBPREFIX}Core
+       ${PACKAGE_LIBPREFIX}Math
+       ${PACKAGE_LIBPREFIX}Geant
+       Eigen3::Eigen
+)
+uLib_add_tests(Geant)

src/HEP/Geant/testing/EventTest.cpp

@@ -0,0 +1,90 @@
+#include "Geant/Solid.h"
+#include "HEP/Geant/GeantEvent.h"
+#include "HEP/Geant/Scene.h"
+#include "HEP/Geant/EmitterPrimary.hh"
+#include "Math/ContainerBox.h"
+#include "Math/TriangleMesh.h"
+#include "Math/Dense.h"
+#include "Math/Units.h"
+#include "testing-prototype.h"
+#include <Geant4/G4Material.hh>
+#include <Geant4/G4NistManager.hh>
+#include <Geant4/G4LogicalVolume.hh>
+#include <Geant4/G4TessellatedSolid.hh>
+#include <string.h>
+
+using namespace uLib;
+
+int main() {
+    BEGIN_TESTING(Geant Event);
+
+    // Test: Scene with iron cube in air, launch muons, collect events //
+    {
+        // 1. Create world box (air, 30m x 30m x 30m)
+        Geant::Scene scene;
+        scene.ConstructWorldBox(Vector3f(30_m, 30_m, 30_m), "G4_AIR");
+
+        // 2. Create iron cube (1m x 1m x 1m) at center
+        ContainerBox iron_box(Vector3f(1000, 1000, 1000)); // mm
+        Geant::BoxSolid *iron_cube = new Geant::BoxSolid("IronCube", &iron_box);
+        iron_cube->SetNistMaterial("G4_Fe");
+        iron_cube->Update(); // apply dimensions
+        scene.AddSolid(iron_cube);
+
+        // 3. Set up emitter (default: mu- at 1 GeV, from z=+10m downward)
+        Geant::EmitterPrimary *emitter = new Geant::EmitterPrimary();
+        scene.SetEmitter(emitter);
+
+        // 4. Initialize Geant4
+        scene.Initialize();
+
+        // 5. Run simulation: 10 muons
+        int nEvents = 10;
+        Vector<Geant::GeantEvent> results;
+        scene.RunSimulation(nEvents, results);
+
+        // 6. Check results
+        printf("  Collected %zu events\n", results.size());
+        TEST1(results.size() > 0);
+
+        for (size_t i = 0; i < results.size(); ++i) {
+            const Geant::GeantEvent &ev = results[i];
+            bool hitIron = false;
+            for (const auto &d : ev.Path()) {
+                if (d.SolidName() == "IronCube") {
+                    hitIron = true;
+                    break;
+                }
+            }
+
+            printf("  Event %d: momentum=%.1f MeV, path steps=%zu, hitIron=%s\n",
+                   ev.GetEventID(),
+                   ev.GetMomentum(),
+                   ev.Path().size(),
+                   hitIron ? "YES" : "NO");
+            
+            // Each event should have at least one step
+            TEST1(ev.Path().size() > 0);
+
+            // Print first few deltas
+            const auto &path = ev.Path();
+            for (size_t j = 0; j < path.size() && j < 5; ++j) {
+                const auto &d = path[j];
+                printf("    Delta[%zu]: solid=%s len=%.2f mm, p=%.1f MeV, "
+                       "dir=(%.3f, %.3f, %.3f)\n",
+                       j,
+                       d.SolidName().c_str(),
+                       d.GetLength(),
+                       d.GetMomentum(),
+                       d.Direction()(0),
+                       d.Direction()(1),
+                       d.Direction()(2));
+            }
+            if (path.size() > 5) {
+                printf("    ... (%zu more deltas)\n", path.size() - 5);
+            }
+        }
+    }
+
+    END_TESTING
+}

src/HEP/Geant/testing/GeantApp.cpp

@@ -0,0 +1,16 @@
+
+
+#include "Math/ContainerBox.h"
+#include "Math/Dense.h"
+#include "HEP/Geant/Scene.h"
+
+using namespace uLib;
+
+int main() {
+
+  uLib::Geant::Scene scene;
+  scene.ConstructWorldBox(Vector3f(100, 100, 100), "G4_AIR");
+  scene.Initialize();
+
+  return 0;
+}

src/HEP/Geant/testing/SkyPlaneEmitterTest.cpp

@@ -0,0 +1,104 @@
+#include "Geant/Solid.h"
+#include "HEP/Geant/GeantEvent.h"
+#include "HEP/Geant/Scene.h"
+#include "HEP/Geant/EmitterPrimary.hh"
+#include "Math/ContainerBox.h"
+#include "Math/Dense.h"
+#include "Math/Units.h"
+#include "HEP/Detectors/DetectorChamber.h"
+
+#include <Geant4/G4SystemOfUnits.hh>
+
+#include <iostream>
+
+using namespace uLib;
+
+int main(int argc, char** argv) {
+
+    int nEvents = 10000;
+    if (argc > 1) {
+        nEvents = std::stoi(argv[1]);
+    }
+
+    // 1. Setup Geant4 Scene
+    Geant::Scene scene;
+    scene.ConstructWorldBox(Vector3f(30_m, 30_m, 30_m), "G4_AIR");
+
+    ContainerBox iron_box;
+    iron_box.Scale(Vector3f(18_m, 10_cm, 18_m));
+    iron_box.SetPosition(Vector3f(-9_m, -5_cm, -9_m));
+    Geant::BoxSolid* iron_cube = new Geant::BoxSolid("IronCube", &iron_box);
+    iron_cube->SetNistMaterial("G4_Fe");
+    iron_cube->Update();
+    scene.AddSolid(iron_cube);
+
+    // Top Detector Chamber (along Y axis)
+    DetectorChamber* top_chamber_box = new DetectorChamber();
+    top_chamber_box->Scale(Vector3f(20_m, 40_cm, 20_m));
+    top_chamber_box->Rotate(90_deg, Vector3f(1, 0, 0));
+    top_chamber_box->SetPosition(Vector3f(-10_m, 12_m, -10_m));
+    Geant::BoxSolid* top_chamber = new Geant::BoxSolid("TopChamber", top_chamber_box);
+    top_chamber->SetNistMaterial("G4_AIR");
+    top_chamber->Update();
+    scene.AddSolid(top_chamber);
+
+    // Bottom Detector Chamber (along Y axis)
+    DetectorChamber* bottom_chamber_box = new DetectorChamber();
+    bottom_chamber_box->Scale(Vector3f(20_m, 40_cm, 20_m));
+    bottom_chamber_box->Rotate(90_deg, Vector3f(1, 0, 0));
+    bottom_chamber_box->SetPosition(Vector3f(-10_m, -12_m, -10_m));
+    Geant::BoxSolid* bottom_chamber = new Geant::BoxSolid("BottomChamber", bottom_chamber_box);
+    bottom_chamber->SetNistMaterial("G4_AIR");
+    bottom_chamber->Update();
+    scene.AddSolid(bottom_chamber);
+
+    // Setup SkyPlaneEmitterPrimary
+    Geant::SkyPlaneEmitterPrimary* emitter = new Geant::SkyPlaneEmitterPrimary();
+    emitter->SetPosition(Vector3f(0, 14.9_m, 0));
+    emitter->Rotate(-90_deg, Vector3f(1, 0, 0));
+    emitter->SetSkySize(Vector2f(20_m, 20_m)); 
+    
+    scene.SetEmitter(emitter);
+    scene.SetVerbosity(1);
+    // scene.Initialize(); // Removed to avoid premature initialization
+
+
+    
+    std::cout << "Starting simulation of " << nEvents << " events..." << std::endl;
+    Vector<Geant::GeantEvent> results;
+    scene.RunSimulation(nEvents, results);
+
+    std::cout << "Simulation finished. Collected " << results.size() << " events." << std::endl;
+
+    // Sample output to verify data collection
+    if (!results.empty()) {
+        std::cout << "Summary: " << std::endl;
+        std::cout << "  Total events generated: " << results.size() << std::endl;
+        size_t total_steps = 0;
+        for (const auto& event : results) {
+            total_steps += event.Path().size();
+        }
+        std::cout << "  Total simulation steps: " << total_steps << std::endl;
+        std::cout << "  Average steps per event: " << static_cast<double>(total_steps) / results.size() << std::endl;
+    }
+
+    std::cout << "\nStarting Detector Simulation of " << nEvents << " events..." << std::endl;
+    Vector<MuonEvent> detectorResults;
+    scene.RunDetectorSimulation(nEvents, detectorResults);
+
+
+
+    std::cout << "Detector Simulation finished." << std::endl;
+    size_t hit_count = 0;
+    for (const auto& ev : detectorResults) {
+        if (!std::isnan(ev.LineIn().origin.x())) {
+            hit_count++;
+        }
+    }
+    std::cout << "  Muons crossing at least one detector: " << hit_count << std::endl;
+    if (nEvents > 0) {
+        std::cout << "  Efficiency: " << (100.0 * hit_count / nEvents) << "%" << std::endl;
+    }
+
+    return 0;
+}

src/HEP/Geant/testing/SolidTest.cpp

@@ -0,0 +1,73 @@
+#include "Geant/Solid.h"
+#include "Math/TriangleMesh.h"
+#include "testing-prototype.h"
+#include <Geant4/G4Material.hh>
+#include <Geant4/G4NistManager.hh>
+#include <Geant4/G4LogicalVolume.hh>
+#include <Geant4/G4TessellatedSolid.hh>
+#include <string.h>
+
+using namespace uLib;
+
+int main() {
+    BEGIN_TESTING(Geant Solid);
+
+    // Test Solid initialization and NIST material //
+    {
+        Geant::Solid solid("test_solid");
+        // Logical volume is not created until material and solid are set
+        TEST1(solid.GetLogical() == nullptr);
+        
+        solid.SetNistMaterial("G4_AIR");
+        // Still null because base Solid has no GetG4Solid()
+        TEST1(solid.GetLogical() == nullptr);
+        TEST1(solid.GetMaterial() != nullptr);
+        TEST1(solid.GetMaterial()->GetName() == "G4_AIR");
+    }
+
+    // Test TessellatedSolid with a simple mesh //
+    {
+        Geant::TessellatedSolid tsolid("test_tessellated");
+        tsolid.SetNistMaterial("G4_AIR");
+        TEST1(tsolid.GetLogical() != nullptr);
+        TEST1(tsolid.GetSolid() != nullptr);
+
+        // cube mesh //
+        TriangleMesh mesh;
+        mesh.AddPoint(Vector3f(0,0,0));
+        mesh.AddPoint(Vector3f(1,0,0));
+        mesh.AddPoint(Vector3f(0,1,0));
+        mesh.AddPoint(Vector3f(1,1,0));
+        mesh.AddPoint(Vector3f(0,0,1));
+        mesh.AddPoint(Vector3f(1,0,1));
+        mesh.AddPoint(Vector3f(0,1,1));
+        mesh.AddPoint(Vector3f(1,1,1));
+        
+        // create triangles (consistent outward winding) //
+        // bottom (z=0)
+        mesh.AddTriangle(Vector3i(0,2,3));
+        mesh.AddTriangle(Vector3i(0,3,1));
+        // top (z=1)
+        mesh.AddTriangle(Vector3i(4,5,7));
+        mesh.AddTriangle(Vector3i(4,7,6));
+        // left (x=0)
+        mesh.AddTriangle(Vector3i(0,4,6));
+        mesh.AddTriangle(Vector3i(0,6,2));
+        // right (x=1)
+        mesh.AddTriangle(Vector3i(1,3,7));
+        mesh.AddTriangle(Vector3i(1,7,5));
+        // front (y=0)
+        mesh.AddTriangle(Vector3i(0,1,5));
+        mesh.AddTriangle(Vector3i(0,5,4));
+        // back (y=1)
+        mesh.AddTriangle(Vector3i(2,6,7));
+        mesh.AddTriangle(Vector3i(2,7,3));
+
+
+
+        tsolid.SetMesh(mesh);
+        TEST1(tsolid.GetSolid()->GetNumberOfFacets() == 12);
+    }
+
+    END_TESTING
+}

src/HEP/Geant/testing/testing-prototype.h

@@ -25,24 +25,13 @@
 
 
 
-#ifndef U_CHAMBERDETECTOR_H
-#define U_CHAMBERDETECTOR_H
+#include <stdio.h>
 
-#include "Core/Types.h"
-#include "Math/ContainerBox.h"
+#define BEGIN_TESTING(name)                \
+static int _fail = 0;                      \
+printf("..:: Testing " #name " ::..\n");
 
-namespace uLib {
+#define TEST1(val) _fail += (val)==0
+#define TEST0(val) _fail += (val)!=0
+#define END_TESTING return _fail;
 
-
-class DetectorChamber : public ContainerBox {
-
-public:
-
-private:
-};
-
-
-}
-
-
-#endif // CHAMBERDETECTOR_H

src/HEP/MuonTomography/Hit.h

@@ -39,12 +39,6 @@ class Hit {
     Type m_DriftTime;
 };
 
-
-
-
-
-
-
 class HitMC {
 public:
     virtual Id_t     GetChamber() = 0;

src/Math/CLHEP_defs.hh

@@ -0,0 +1,373 @@
+#if !defined(HAVE_GEANT4) && !defined(HEP_SYSTEM_OF_UNITS_H) && !defined(HEP_PHYSICAL_CONSTANTS_H)
+#ifndef CLHEP_defs_h
+#define CLHEP_defs_h
+
+
+
+namespace CLHEP {
+
+
+// UNITS //
+//
+//
+//
+static constexpr double     pi  = 3.14159265358979323846;
+static constexpr double  twopi  = 2*pi;
+static constexpr double halfpi  = pi/2;
+static constexpr double     pi2 = pi*pi;
+
+//
+//
+//
+static constexpr double millimeter  = 1.;                        
+static constexpr double millimeter2 = millimeter*millimeter;
+static constexpr double millimeter3 = millimeter*millimeter*millimeter;
+
+static constexpr double centimeter  = 10.*millimeter;   
+static constexpr double centimeter2 = centimeter*centimeter;
+static constexpr double centimeter3 = centimeter*centimeter*centimeter;
+
+static constexpr double meter  = 1000.*millimeter;                  
+static constexpr double meter2 = meter*meter;
+static constexpr double meter3 = meter*meter*meter;
+
+static constexpr double kilometer = 1000.*meter;                   
+static constexpr double kilometer2 = kilometer*kilometer;
+static constexpr double kilometer3 = kilometer*kilometer*kilometer;
+
+static constexpr double parsec = 3.0856775807e+16*meter;
+
+static constexpr double micrometer = 1.e-6 *meter;             
+static constexpr double  nanometer = 1.e-9 *meter;
+static constexpr double  angstrom  = 1.e-10*meter;
+static constexpr double  fermi     = 1.e-15*meter;
+
+static constexpr double      barn = 1.e-28*meter2;
+static constexpr double millibarn = 1.e-3 *barn;
+static constexpr double microbarn = 1.e-6 *barn;
+static constexpr double  nanobarn = 1.e-9 *barn;
+static constexpr double  picobarn = 1.e-12*barn;
+
+// symbols
+static constexpr double nm  = nanometer;                        
+static constexpr double um  = micrometer;                        
+
+static constexpr double mm  = millimeter;                        
+static constexpr double mm2 = millimeter2;
+static constexpr double mm3 = millimeter3;
+
+static constexpr double cm  = centimeter;   
+static constexpr double cm2 = centimeter2;
+static constexpr double cm3 = centimeter3;
+
+static constexpr double liter = 1.e+3*cm3;
+static constexpr double  L = liter;
+static constexpr double dL = 1.e-1*liter;
+static constexpr double cL = 1.e-2*liter;
+static constexpr double mL = 1.e-3*liter;       
+
+static constexpr double m  = meter;                  
+static constexpr double m2 = meter2;
+static constexpr double m3 = meter3;
+
+static constexpr double km  = kilometer;                   
+static constexpr double km2 = kilometer2;
+static constexpr double km3 = kilometer3;
+
+static constexpr double pc = parsec;
+
+//
+// Angle
+//
+static constexpr double radian      = 1.;                  
+static constexpr double milliradian = 1.e-3*radian;
+static constexpr double degree = (pi/180.0)*radian;
+
+static constexpr double   steradian = 1.;
+  
+// symbols
+static constexpr double rad  = radian;
+static constexpr double mrad = milliradian;
+static constexpr double sr   = steradian;
+static constexpr double deg  = degree;
+
+//
+// Time [T]
+//
+static constexpr double nanosecond  = 1.;
+static constexpr double second      = 1.e+9 *nanosecond;
+static constexpr double millisecond = 1.e-3 *second;
+static constexpr double microsecond = 1.e-6 *second;
+static constexpr double  picosecond = 1.e-12*second;
+
+static constexpr double minute = 60*second;
+static constexpr double hour   = 60*minute;
+static constexpr double day    = 24*hour;
+static constexpr double year   = 365*day;  
+
+static constexpr double hertz = 1./second;
+static constexpr double kilohertz = 1.e+3*hertz;
+static constexpr double megahertz = 1.e+6*hertz;
+
+// symbols
+static constexpr double ns = nanosecond;
+static constexpr double  s = second;
+static constexpr double ms = millisecond;
+static constexpr double us = microsecond;
+static constexpr double ps = picosecond;
+
+//
+// Electric charge [Q]
+//
+static constexpr double eplus = 1. ;// positron charge
+static constexpr double e_SI  = 1.602176634e-19;// positron charge in coulomb
+static constexpr double coulomb = eplus/e_SI;// coulomb = 6.24150 e+18 * eplus
+
+//
+// Energy [E]
+//
+static constexpr double megaelectronvolt = 1. ;
+static constexpr double     electronvolt = 1.e-6*megaelectronvolt;
+static constexpr double kiloelectronvolt = 1.e-3*megaelectronvolt;
+static constexpr double gigaelectronvolt = 1.e+3*megaelectronvolt;
+static constexpr double teraelectronvolt = 1.e+6*megaelectronvolt;
+static constexpr double petaelectronvolt = 1.e+9*megaelectronvolt;
+static constexpr double millielectronvolt = 1.e-9*megaelectronvolt;  
+
+static constexpr double joule = electronvolt/e_SI;// joule = 6.24150 e+12 * MeV
+
+// symbols
+static constexpr double MeV = megaelectronvolt;
+static constexpr double  eV = electronvolt;
+static constexpr double keV = kiloelectronvolt;
+static constexpr double GeV = gigaelectronvolt;
+static constexpr double TeV = teraelectronvolt;
+static constexpr double PeV = petaelectronvolt;
+
+//
+// Mass [E][T^2][L^-2]
+//
+static constexpr double  kilogram = joule*second*second/(meter*meter);   
+static constexpr double      gram = 1.e-3*kilogram;
+static constexpr double milligram = 1.e-3*gram;
+
+// symbols
+static constexpr double  kg = kilogram;
+static constexpr double   g = gram;
+static constexpr double  mg = milligram;
+
+//
+// Power [E][T^-1]
+//
+static constexpr double watt = joule/second;// watt = 6.24150 e+3 * MeV/ns
+
+//
+// Force [E][L^-1]
+//
+static constexpr double newton = joule/meter;// newton = 6.24150 e+9 * MeV/mm
+
+//
+// Pressure [E][L^-3]
+//
+#define pascal hep_pascal                          // a trick to avoid warnings 
+static constexpr double hep_pascal = newton/m2;   // pascal = 6.24150 e+3 * MeV/mm3
+static constexpr double bar        = 100000*pascal; // bar    = 6.24150 e+8 * MeV/mm3
+static constexpr double atmosphere = 101325*pascal; // atm    = 6.32420 e+8 * MeV/mm3
+
+//
+// Electric current [Q][T^-1]
+//
+static constexpr double      ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns
+static constexpr double milliampere = 1.e-3*ampere;
+static constexpr double microampere = 1.e-6*ampere;
+static constexpr double  nanoampere = 1.e-9*ampere;
+
+//
+// Electric potential [E][Q^-1]
+//
+static constexpr double megavolt = megaelectronvolt/eplus;
+static constexpr double kilovolt = 1.e-3*megavolt;
+static constexpr double     volt = 1.e-6*megavolt;
+
+//
+// Electric resistance [E][T][Q^-2]
+//
+static constexpr double ohm = volt/ampere;// ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)
+
+//
+// Electric capacitance [Q^2][E^-1]
+//
+static constexpr double farad = coulomb/volt;// farad = 6.24150e+24 * eplus/Megavolt
+static constexpr double millifarad = 1.e-3*farad;
+static constexpr double microfarad = 1.e-6*farad;
+static constexpr double  nanofarad = 1.e-9*farad;
+static constexpr double  picofarad = 1.e-12*farad;
+
+//
+// Magnetic Flux [T][E][Q^-1]
+//
+static constexpr double weber = volt*second;// weber = 1000*megavolt*ns
+
+//
+// Magnetic Field [T][E][Q^-1][L^-2]
+//
+static constexpr double tesla     = volt*second/meter2;// tesla =0.001*megavolt*ns/mm2
+
+static constexpr double gauss     = 1.e-4*tesla;
+static constexpr double kilogauss = 1.e-1*tesla;
+
+//
+// Inductance [T^2][E][Q^-2]
+//
+static constexpr double henry = weber/ampere;// henry = 1.60217e-7*MeV*(ns/eplus)**2
+
+//
+// Temperature
+//
+static constexpr double kelvin = 1.;
+
+//
+// Amount of substance
+//
+static constexpr double mole = 1.;
+
+//
+// Activity [T^-1]
+//
+static constexpr double becquerel = 1./second ;
+static constexpr double curie = 3.7e+10 * becquerel;
+static constexpr double kilobecquerel = 1.e+3*becquerel;
+static constexpr double megabecquerel = 1.e+6*becquerel;
+static constexpr double gigabecquerel = 1.e+9*becquerel;
+static constexpr double millicurie = 1.e-3*curie;
+static constexpr double microcurie = 1.e-6*curie;
+static constexpr double Bq = becquerel;
+static constexpr double kBq = kilobecquerel;
+static constexpr double MBq = megabecquerel;
+static constexpr double GBq = gigabecquerel;
+static constexpr double Ci = curie;
+static constexpr double mCi = millicurie;
+static constexpr double uCi = microcurie;
+
+//
+// Absorbed dose [L^2][T^-2]
+//
+static constexpr double      gray = joule/kilogram ;
+static constexpr double  kilogray = 1.e+3*gray;
+static constexpr double milligray = 1.e-3*gray;
+static constexpr double microgray = 1.e-6*gray;
+
+//
+// Luminous intensity [I]
+//
+static constexpr double candela = 1.;
+
+//
+// Luminous flux [I]
+//
+static constexpr double lumen = candela*steradian;
+
+//
+// Illuminance [I][L^-2]
+//
+static constexpr double lux = lumen/meter2;
+
+//
+// Miscellaneous
+//
+static constexpr double perCent     = 0.01 ;
+static constexpr double perThousand = 0.001;
+static constexpr double perMillion  = 0.000001;
+
+
+
+// CONSTANTS //
+
+//
+// 
+//
+static constexpr double Avogadro = 6.02214076e+23/mole;
+
+//
+// c   = 299.792458 mm/ns
+// c^2 = 898.7404 (mm/ns)^2 
+//
+static constexpr double c_light   = 2.99792458e+8 * m/s;
+static constexpr double c_squared = c_light * c_light;
+
+//
+// h     = 4.13566e-12 MeV*ns
+// hbar  = 6.58212e-13 MeV*ns
+// hbarc = 197.32705e-12 MeV*mm
+//
+static constexpr double h_Planck      = 6.62607015e-34 * joule*s;
+static constexpr double hbar_Planck   = h_Planck/twopi;
+static constexpr double hbarc         = hbar_Planck * c_light;
+static constexpr double hbarc_squared = hbarc * hbarc;
+
+//
+//
+//
+static constexpr double electron_charge = - eplus; // see SystemOfUnits.h
+static constexpr double e_squared = eplus * eplus;
+
+//
+// amu_c2 - atomic equivalent mass unit
+//        - AKA, unified atomic mass unit (u)
+// amu    - atomic mass unit
+//
+static constexpr double electron_mass_c2 = 0.510998910 * MeV;
+static constexpr double   proton_mass_c2 = 938.272013 * MeV;
+static constexpr double  neutron_mass_c2 = 939.56536 * MeV;
+static constexpr double           amu_c2 = 931.494028 * MeV;
+static constexpr double              amu = amu_c2/c_squared;
+
+//
+// permeability of free space mu0    = 2.01334e-16 Mev*(ns*eplus)^2/mm
+// permittivity of free space epsil0 = 5.52636e+10 eplus^2/(MeV*mm)
+//
+static constexpr double mu0      = 4*pi*1.e-7 * henry/m;
+static constexpr double epsilon0 = 1./(c_squared*mu0);
+
+//
+// electromagnetic coupling = 1.43996e-12 MeV*mm/(eplus^2)
+//
+static constexpr double elm_coupling           = e_squared/(4*pi*epsilon0);
+static constexpr double fine_structure_const   = elm_coupling/hbarc;
+static constexpr double classic_electr_radius  = elm_coupling/electron_mass_c2;
+static constexpr double electron_Compton_length = hbarc/electron_mass_c2;
+static constexpr double Bohr_radius = electron_Compton_length/fine_structure_const;
+
+static constexpr double alpha_rcl2 = fine_structure_const
+                                   *classic_electr_radius
+                                   *classic_electr_radius;
+
+static constexpr double twopi_mc2_rcl2 = twopi*electron_mass_c2
+                                             *classic_electr_radius
+                                             *classic_electr_radius;
+
+static constexpr double Bohr_magneton = (eplus*hbarc*c_light)/(2*electron_mass_c2);
+static constexpr double nuclear_magneton = (eplus*hbarc*c_light)/(2*proton_mass_c2);
+
+//
+//
+//
+static constexpr double k_Boltzmann = 8.617333e-11 * MeV/kelvin;
+
+//
+//
+//
+static constexpr double STP_Temperature = 273.15*kelvin;
+static constexpr double STP_Pressure    = 1.*atmosphere;
+static constexpr double kGasThreshold   = 10.*mg/cm3;
+
+//
+//
+//
+static constexpr double universe_mean_density = 1.e-25*g/cm3;
+
+}  // namespace CLHEP
+
+#endif // CLHEP_defs_h
+#endif // HAVE_GEANT4 / CLHEP checks
+

src/Math/CMakeLists.txt

@@ -19,20 +19,26 @@ set(HEADERS ContainerBox.h
             VoxImageFilterCustom.hpp
             Accumulator.h
             TriangleMesh.h
+            QuadMesh.h
             BitCode.h
             Structured2DGrid.h
-            Structured4DGrid.h)
+            Structured4DGrid.h
+            Units.h
+            CLHEP_defs.hh)
 
 set(SOURCES VoxRaytracer.cpp
             StructuredData.cpp
             StructuredGrid.cpp
             VoxImage.cpp
             TriangleMesh.cpp
+            QuadMesh.cpp
             Dense.cpp
             Structured2DGrid.cpp
-            Structured4DGrid.cpp)
+            Structured4DGrid.cpp
+            MathRegistrations.cpp)
 
-set(LIBRARIES Eigen3::Eigen
+set(LIBRARIES ${PACKAGE_LIBPREFIX}Core
+              Eigen3::Eigen
               ${ROOT_LIBRARIES}
               ${VTK_LIBRARIES})
 
@@ -54,7 +60,7 @@ endif()
 
 
 install(TARGETS ${libname}
-        EXPORT "${PROJECT_NAME}Targets"
+        EXPORT "uLibTargets"
         RUNTIME DESTINATION ${INSTALL_BIN_DIR} COMPONENT bin
         LIBRARY DESTINATION ${INSTALL_LIB_DIR} COMPONENT lib)