add voximage represetation and test

src/Vtk/Math/testing/vtkVoxImageInteractiveTest.cpp

@@ -0,0 +1,129 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// 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 >
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#include "Vtk/Math/vtkVoxImage.h"
+#include "Math/VoxImage.h"
+#include "Vtk/uLibVtkViewer.h"
+#include <vtkSmartPointer.h>
+#include <vtkCallbackCommand.h>
+#include <vtkRenderWindowInteractor.h>
+#include <vtkProperty.h>
+#include <vtkRenderer.h>
+#include <vtkRenderWindow.h>
+#include <iostream>
+#include <cmath>
+
+using namespace uLib;
+
+struct AppState {
+    std::vector<Vtk::vtkVoxImage*> images;
+    Vtk::Viewer* viewer;
+};
+
+void KeyPressCallbackFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData) {
+    auto* interactor = static_cast<vtkRenderWindowInteractor*>(caller);
+    auto* state = static_cast<AppState*>(clientData);
+    
+    std::string key = interactor->GetKeySym();
+    if (key == "w") {
+        std::cout << "--> Switching all images to Wireframe Box" << std::endl;
+        for (auto* img : state->images) img->SetRepresentation(Vtk::Puppet::Wireframe);
+        state->viewer->GetRenderWindow()->Render();
+    }
+    else if (key == "s") {
+        std::cout << "--> Switching all images to Surface (Volume Rendering)" << std::endl;
+        for (auto* img : state->images) img->SetRepresentation(Vtk::Puppet::Surface);
+        state->viewer->GetRenderWindow()->Render();
+    }
+}
+
+int main(int argc, char** argv) {
+    float factor = 1.0e6f;
+
+    // --- Image 1: Spherical Shell ---
+    Vector3i dims1(64, 64, 64);
+    VoxImage<Voxel> img1(dims1);
+    img1.SetSpacing(Vector3f(1.0, 1.0, 1.0));
+    img1.SetPosition(Vector3f(-40, -32, -32));
+
+    for (int z = 0; z < dims1(2); ++z) {
+        for (int y = 0; y < dims1(1); ++y) {
+            for (int x = 0; x < dims1(0); ++x) {
+                float dx = x - 32.0f;
+                float dy = y - 32.0f;
+                float dz = z - 32.0f;
+                float dist = std::sqrt(dx*dx + dy*dy + dz*dz);
+                Voxel v;
+                if (dist < 25.0f && dist > 10.0f) {
+                    v.Value = (40.0f * (25.0f - dist) / 15.0f) / factor; 
+                } else {
+                    v.Value = 0.0f;
+                }
+                img1[Vector3i(x, y, z)] = v;
+            }
+        }
+    }
+
+    // --- Image 2: Axes Gradient ---
+    Vector3i dims2(64, 64, 64);
+    VoxImage<Voxel> img2(dims2);
+    img2.SetSpacing(Vector3f(1.0, 1.0, 1.0));
+    img2.SetPosition(Vector3f(40, -32, -32));
+
+    for (int z = 0; z < dims2(2); ++z) {
+        for (int y = 0; y < dims2(1); ++y) {
+            for (int x = 0; x < dims2(0); ++x) {
+                Voxel v;
+                // Linear gradient along X, Y, Z
+                float val = (float(x)/dims2(0) + float(y)/dims2(1) + float(z)/dims2(2)) / 3.0f;
+                v.Value = (40.0f * val) / factor;
+                img2[Vector3i(x, y, z)] = v;
+            }
+        }
+    }
+
+    Vtk::vtkVoxImage vtk_img1(img1);
+    vtk_img1.setShadingPreset(0);
+
+    Vtk::vtkVoxImage vtk_img2(img2);
+    vtk_img2.setShadingPreset(1); // Use Composite without MIP for variety
+
+    Vtk::Viewer viewer;
+    viewer.GetRenderer()->SetBackground(0.05, 0.05, 0.1);
+    viewer.AddPuppet(vtk_img1);
+    viewer.AddPuppet(vtk_img2);
+    
+    // Setup KeyPress Callback
+    AppState state;
+    state.images.push_back(&vtk_img1);
+    state.images.push_back(&vtk_img2);
+    state.viewer = &viewer;
+
+    vtkSmartPointer<vtkCallbackCommand> keyCallback = vtkSmartPointer<vtkCallbackCommand>::New();
+    keyCallback->SetCallback(KeyPressCallbackFunction);
+    keyCallback->SetClientData(&state);
+    viewer.GetInteractor()->AddObserver(vtkCommand::KeyPressEvent, keyCallback);
+
+    std::cout << "=========================================" << std::endl;
+    std::cout << " vtkVoxImage Interactive Viewer Test" << std::endl;
+    std::cout << " [LEFT] Spherical Shell (MIP)" << std::endl;
+    std::cout << " [RIGHT] Axes Gradient (Composite)" << std::endl;
+    std::cout << "-----------------------------------------" << std::endl;
+    std::cout << " Press [w] to show Wireframe Bounding Boxes" << std::endl;
+    std::cout << " Press [s] to switch back to Volume Rendering" << std::endl;
+    std::cout << " Press [q] to quit" << std::endl;
+    std::cout << "=========================================" << std::endl;
+
+    viewer.ZoomAuto();
+    viewer.Start();
+
+    return 0;
+}