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File indexing completed on 2026-10-04 09:14:02
0001 // Created on: 2014-09-06 0002 // Created by: Denis BOGOLEPOV 0003 // Copyright (c) 2013-2014 OPEN CASCADE SAS 0004 // 0005 // This file is part of Open CASCADE Technology software library. 0006 // 0007 // This library is free software; you can redistribute it and/or modify it under 0008 // the terms of the GNU Lesser General Public License version 2.1 as published 0009 // by the Free Software Foundation, with special exception defined in the file 0010 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT 0011 // distribution for complete text of the license and disclaimer of any warranty. 0012 // 0013 // Alternatively, this file may be used under the terms of Open CASCADE 0014 // commercial license or contractual agreement. 0015 0016 #ifndef _BVH_DistanceField_Header 0017 #define _BVH_DistanceField_Header 0018 0019 #include <BVH_Geometry.hxx> 0020 0021 template <class T, int N> 0022 class BVH_ParallelDistanceFieldBuilder; 0023 0024 //! Tool object for building 3D distance field from the set of BVH triangulations. 0025 //! Distance field is a scalar field that measures the distance from a given point 0026 //! to some object, including optional information about the inside and outside of 0027 //! the structure. Distance fields are used as alternative surface representations 0028 //! (like polygons or NURBS). 0029 template <class T, int N> 0030 class BVH_DistanceField 0031 { 0032 friend class BVH_ParallelDistanceFieldBuilder<T, N>; 0033 0034 public: 0035 typedef typename BVH::VectorType<T, N>::Type BVH_VecNt; 0036 0037 public: 0038 //! Creates empty 3D distance field. 0039 BVH_DistanceField(const int theMaximumSize, const bool theComputeSign); 0040 0041 //! Releases resources of 3D distance field. 0042 virtual ~BVH_DistanceField(); 0043 0044 //! Builds 3D distance field from BVH geometry. 0045 bool Build(BVH_Geometry<T, N>& theGeometry); 0046 0047 //! Returns parallel flag. 0048 inline bool IsParallel() const { return myIsParallel; } 0049 0050 //! Set parallel flag controlling possibility of parallel execution. 0051 inline void SetParallel(const bool isParallel) { myIsParallel = isParallel; } 0052 0053 public: 0054 //! Returns packed voxel data. 0055 const T* PackedData() const { return myVoxelData; } 0056 0057 //! Returns distance value for the given voxel. 0058 T& Voxel(const int theX, const int theY, const int theZ) 0059 { 0060 return myVoxelData[theX + (theY + theZ * myDimensionY) * myDimensionX]; 0061 } 0062 0063 //! Returns distance value for the given voxel. 0064 T Voxel(const int theX, const int theY, const int theZ) const 0065 { 0066 return myVoxelData[theX + (theY + theZ * myDimensionY) * myDimensionX]; 0067 } 0068 0069 //! Returns size of voxel grid in X dimension. 0070 int DimensionX() const { return myDimensionX; } 0071 0072 //! Returns size of voxel grid in Y dimension. 0073 int DimensionY() const { return myDimensionY; } 0074 0075 //! Returns size of voxel grid in Z dimension. 0076 int DimensionZ() const { return myDimensionZ; } 0077 0078 //! Returns size of single voxel. 0079 const BVH_VecNt& VoxelSize() const { return myVoxelSize; } 0080 0081 //! Returns minimum corner of voxel grid. 0082 const BVH_VecNt& CornerMin() const { return myCornerMin; } 0083 0084 //! Returns maximum corner of voxel grid. 0085 const BVH_VecNt& CornerMax() const { return myCornerMax; } 0086 0087 protected: 0088 //! Performs building of distance field for the given Z slices. 0089 void BuildSlices(BVH_Geometry<T, N>& theGeometry, const int theStartZ, const int theFinalZ); 0090 0091 protected: 0092 //! Array of voxels. 0093 T* myVoxelData; 0094 0095 //! Size of single voxel. 0096 BVH_VecNt myVoxelSize; 0097 0098 //! Minimum corner of voxel grid. 0099 BVH_VecNt myCornerMin; 0100 0101 //! Maximum corner of voxel grid. 0102 BVH_VecNt myCornerMax; 0103 0104 //! Size of voxel grid in X dimension. 0105 int myDimensionX; 0106 0107 //! Size of voxel grid in Y dimension. 0108 int myDimensionY; 0109 0110 //! Size of voxel grid in Z dimension. 0111 int myDimensionZ; 0112 0113 //! Size of voxel grid in maximum dimension. 0114 int myMaximumSize; 0115 0116 //! Enables/disables signing of distance field. 0117 bool myComputeSign; 0118 0119 bool myIsParallel; 0120 }; 0121 0122 #include <BVH_DistanceField.lxx> 0123 0124 #endif // _BVH_DistanceField_Header
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