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src/Math/VoxRaytracer.h

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+/*//////////////////////////////////////////////////////////////////////////////
+// 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 VOXRAYTRACER_H
+#define VOXRAYTRACER_H
+
+#include <math.h>
+
+#include "Core/Vector.h"
+#include "Math/StructuredGrid.h"
+
+namespace uLib {
+
+class VoxRaytracer {
+
+public:
+    class RayData {
+    public:
+        RayData() : m_TotalLength(0) {}
+
+        typedef struct {
+            Id_t vox_id;
+            Scalarf L;
+        } Element;
+
+        inline void AddElement(Id_t id, float L);
+
+        void AppendRay ( const RayData &in);
+
+        uLibConstRefMacro(Data,Vector<Element>)
+        uLibConstRefMacro(TotalLength,Scalarf)
+
+        void PrintSelf(std::ostream &o);
+
+    private:
+        Vector<Element> m_Data;
+        Scalarf         m_TotalLength;
+    };
+
+
+ public:
+ VoxRaytracer(StructuredGrid &image) : m_Image(&image) {
+      m_scale <<
+	(m_Image->GetWorldMatrix() * Vector4f(1,0,0,0)).norm(),
+	(m_Image->GetWorldMatrix() * Vector4f(0,1,0,0)).norm(),
+	(m_Image->GetWorldMatrix() * Vector4f(0,0,1,0)).norm();
+    }
+
+    bool GetEntryPoint(const HLine3f &line, HPoint3f &pt);
+
+    bool GetExitPoint(const HLine3f &line, HPoint3f &pt);
+
+    RayData TraceBetweenPoints(const HPoint3f &in, const HPoint3f &out) const;
+
+    RayData TraceLine(const HLine3f &line) const;
+
+    uLibGetMacro(Image,StructuredGrid *)
+
+private:
+    StructuredGrid *m_Image;
+    Vector3f        m_scale;	
+};
+
+}
+
+
+
+#endif // VOXRAYTRACER_H