Geant4 Cross Reference |
1 // 1 // 2 // ******************************************* 2 // ******************************************************************** 3 // * License and Disclaimer 3 // * License and Disclaimer * 4 // * 4 // * * 5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of * 6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. 9 // * include a list of copyright holders. * 10 // * 10 // * * 11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 // class G4BoundingEnvelope 26 // class G4BoundingEnvelope 27 // 27 // 28 // Class description: 28 // Class description: 29 // 29 // 30 // Helper class to facilitate calculation of t 30 // Helper class to facilitate calculation of the extent of a solid 31 // within the limits defined by a G4VoxelLimit 31 // within the limits defined by a G4VoxelLimits object. 32 // 32 // 33 // The function CalculateExtent() of a particu 33 // The function CalculateExtent() of a particular solid can create 34 // a G4BoundingEnvelope object that bounds the 34 // a G4BoundingEnvelope object that bounds the solid and then call 35 // CalculateExtent() of the G4BoundingEnvelope 35 // CalculateExtent() of the G4BoundingEnvelope object. 36 // 36 // 37 // Calculation of extent uses G4Transform3D, t 37 // Calculation of extent uses G4Transform3D, thus takes into account 38 // scaling and reflection, if any. 38 // scaling and reflection, if any. 39 39 40 // 2016.05.25, E.Tcherniaev - initial version 40 // 2016.05.25, E.Tcherniaev - initial version 41 // ------------------------------------------- 41 // -------------------------------------------------------------------- 42 #ifndef G4BOUNDINGENVELOPE_HH 42 #ifndef G4BOUNDINGENVELOPE_HH 43 #define G4BOUNDINGENVELOPE_HH 43 #define G4BOUNDINGENVELOPE_HH 44 44 45 #include <vector> 45 #include <vector> 46 #include "geomdefs.hh" 46 #include "geomdefs.hh" 47 47 48 #include "G4ThreeVector.hh" 48 #include "G4ThreeVector.hh" 49 #include "G4VoxelLimits.hh" 49 #include "G4VoxelLimits.hh" 50 #include "G4Transform3D.hh" 50 #include "G4Transform3D.hh" 51 #include "G4Point3D.hh" 51 #include "G4Point3D.hh" 52 #include "G4Plane3D.hh" 52 #include "G4Plane3D.hh" 53 53 54 using G4ThreeVectorList = std::vector<G4ThreeV 54 using G4ThreeVectorList = std::vector<G4ThreeVector>; 55 using G4Polygon3D = std::vector<G4Point3D>; 55 using G4Polygon3D = std::vector<G4Point3D>; 56 using G4Segment3D = std::pair<G4Point3D,G4Poin 56 using G4Segment3D = std::pair<G4Point3D,G4Point3D>; 57 57 58 class G4BoundingEnvelope 58 class G4BoundingEnvelope 59 { 59 { 60 public: 60 public: 61 61 62 G4BoundingEnvelope(const G4ThreeVector& pM 62 G4BoundingEnvelope(const G4ThreeVector& pMin, 63 const G4ThreeVector& pM 63 const G4ThreeVector& pMax); 64 // Constructor from an axis aligned boun 64 // Constructor from an axis aligned bounding box (AABB) 65 65 66 G4BoundingEnvelope(const std::vector<const 66 G4BoundingEnvelope(const std::vector<const G4ThreeVectorList*>& polygons); 67 // Constructor from a sequence of convex 67 // Constructor from a sequence of convex polygons, the polygons 68 // should have equal numbers of vertices 68 // should have equal numbers of vertices except first and last 69 // polygons which may consist of a singl 69 // polygons which may consist of a single vertex 70 70 71 G4BoundingEnvelope(const G4ThreeVector& pM 71 G4BoundingEnvelope(const G4ThreeVector& pMin, 72 const G4ThreeVector& pM 72 const G4ThreeVector& pMax, 73 const std::vector<const 73 const std::vector<const G4ThreeVectorList*>& polygons); 74 // Constructor from AABB and a sequence 74 // Constructor from AABB and a sequence of polygons 75 75 76 ~G4BoundingEnvelope() = default; 76 ~G4BoundingEnvelope() = default; 77 // Destructor 77 // Destructor 78 78 79 G4bool BoundingBoxVsVoxelLimits(const EAxi 79 G4bool BoundingBoxVsVoxelLimits(const EAxis pAxis, 80 const G4Vo 80 const G4VoxelLimits& pVoxelLimits, 81 const G4Tr 81 const G4Transform3D& pTransform3D, 82 G4double& 82 G4double& pMin, G4double& pMax) const; 83 // Analyse the position of the bounding 83 // Analyse the position of the bounding box relative to the voxel. 84 // It returns "true" in the case where t 84 // It returns "true" in the case where the value of the extent can be 85 // figured out directly from the dimensi 85 // figured out directly from the dimensions of the bounding box, or 86 // it is clear that the bounding box and 86 // it is clear that the bounding box and the voxel do not intersect. 87 // The reply "false" means that further 87 // The reply "false" means that further calculations are needed. 88 88 89 G4bool CalculateExtent(const EAxis pAxis, 89 G4bool CalculateExtent(const EAxis pAxis, 90 const G4VoxelLimits 90 const G4VoxelLimits& pVoxelLimits, 91 const G4Transform3D 91 const G4Transform3D& pTransform3D, 92 G4double& pMin, G4d 92 G4double& pMin, G4double& pMax) const; 93 // Calculate extent of the bounding enve 93 // Calculate extent of the bounding envelope 94 94 95 private: 95 private: 96 96 97 void CheckBoundingBox(); 97 void CheckBoundingBox(); 98 // Check correctness of the AABB (axis a 98 // Check correctness of the AABB (axis aligned bounding box) 99 99 100 void CheckBoundingPolygons(); 100 void CheckBoundingPolygons(); 101 // Check correctness of the sequence of 101 // Check correctness of the sequence of convex polygonal bases 102 102 103 G4double FindScaleFactor(const G4Transform 103 G4double FindScaleFactor(const G4Transform3D& pTransform3D) const; 104 // Find max scale factor of the transfor 104 // Find max scale factor of the transformation 105 105 106 void TransformVertices(const G4Transform3D 106 void TransformVertices(const G4Transform3D& pTransform3D, 107 std::vector<G << 107 std::vector<G4Polygon3D*>& pBases) const; 108 std::vector<s << 109 // Create list of transformed polygons 108 // Create list of transformed polygons 110 109 111 void GetPrismAABB(const G4Polygon3D& pBase 110 void GetPrismAABB(const G4Polygon3D& pBaseA, 112 const G4Polygon3D& pBase 111 const G4Polygon3D& pBaseB, 113 G4Segment3D& pAABB 112 G4Segment3D& pAABB) const; 114 // Find bounding box of a prism 113 // Find bounding box of a prism 115 114 116 void CreateListOfEdges(const G4Polygon3D& 115 void CreateListOfEdges(const G4Polygon3D& baseA, 117 const G4Polygon3D& 116 const G4Polygon3D& baseB, 118 std::vector<G 117 std::vector<G4Segment3D>& pEdges) const; 119 // Create list of edges of a prism 118 // Create list of edges of a prism 120 << 119 121 void CreateListOfPlanes(const G4Polygon3D& 120 void CreateListOfPlanes(const G4Polygon3D& baseA, 122 const G4Polygon3D& 121 const G4Polygon3D& baseB, 123 std::vector< 122 std::vector<G4Plane3D>& pPlanes) const; 124 // Create list of planes bounding a pris 123 // Create list of planes bounding a prism 125 124 126 G4bool ClipEdgesByVoxel(const std::vector< 125 G4bool ClipEdgesByVoxel(const std::vector<G4Segment3D>& pEdges, 127 const G4VoxelLimit 126 const G4VoxelLimits& pLimits, 128 G4Segment3D& 127 G4Segment3D& pExtent) const; 129 // Clip set of edges by G4VoxelLimits 128 // Clip set of edges by G4VoxelLimits 130 129 131 void ClipVoxelByPlanes(G4int pBits, 130 void ClipVoxelByPlanes(G4int pBits, 132 const G4VoxelLimits 131 const G4VoxelLimits& pLimits, 133 const std::vector<G 132 const std::vector<G4Plane3D>& pPlanes, 134 const G4Segment3D& 133 const G4Segment3D& pAABB, 135 G4Segment3D& 134 G4Segment3D& pExtent) const; 136 // Clip G4VoxelLimits by set of planes b 135 // Clip G4VoxelLimits by set of planes bounding a prism 137 136 138 private: 137 private: 139 138 140 G4ThreeVector fMin, fMax; << 139 G4ThreeVector fMin, fMax; 141 // original bounding box 140 // original bounding box 142 141 143 const std::vector<const G4ThreeVectorList* 142 const std::vector<const G4ThreeVectorList*>* fPolygons = nullptr; 144 // ref to original sequence of polygonal 143 // ref to original sequence of polygonal bases 145 }; 144 }; 146 145 147 #endif // G4BOUNDINGENVELOPE_HH 146 #endif // G4BOUNDINGENVELOPE_HH 148 147