1 /* 2 Open Asset Import Library (assimp) 3 ---------------------------------------------------------------------- 4 5 Copyright (c) 2006-2019, assimp team 6 7 8 All rights reserved. 9 10 Redistribution and use of this software in source and binary forms, 11 with or without modification, are permitted provided that the 12 following conditions are met: 13 14 * Redistributions of source code must retain the above 15 copyright notice, this list of conditions and the 16 following disclaimer. 17 18 * Redistributions in binary form must reproduce the above 19 copyright notice, this list of conditions and the 20 following disclaimer in the documentation and/or other 21 materials provided with the distribution. 22 23 * Neither the name of the assimp team, nor the names of its 24 contributors may be used to endorse or promote products 25 derived from this software without specific prior 26 written permission of the assimp team. 27 28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 40 ---------------------------------------------------------------------- 41 */ 42 43 /** @file Defines a helper class to compute a vertex-triangle adjacency map */ 44 #ifndef AI_VTADJACENCY_H_INC 45 #define AI_VTADJACENCY_H_INC 46 47 #include "BaseProcess.h" 48 #include <assimp/types.h> 49 #include <assimp/ai_assert.h> 50 51 struct aiMesh; 52 struct aiFace; 53 54 namespace Assimp { 55 56 // -------------------------------------------------------------------------------------------- 57 /** @brief The VertexTriangleAdjacency class computes a vertex-triangle 58 * adjacency map from a given index buffer. 59 * 60 * @note Although it is called #VertexTriangleAdjacency, the current version does also 61 * support arbitrary polygons. */ 62 // -------------------------------------------------------------------------------------------- 63 class ASSIMP_API VertexTriangleAdjacency { 64 public: 65 // ---------------------------------------------------------------------------- 66 /** @brief Construction from an existing index buffer 67 * @param pcFaces Index buffer 68 * @param iNumFaces Number of faces in the buffer 69 * @param iNumVertices Number of referenced vertices. This value 70 * is computed automatically if 0 is specified. 71 * @param bComputeNumTriangles If you want the class to compute 72 * a list containing the number of referenced triangles per vertex 73 * per vertex - pass true. */ 74 VertexTriangleAdjacency(aiFace* pcFaces,unsigned int iNumFaces, 75 unsigned int iNumVertices = 0, 76 bool bComputeNumTriangles = true); 77 78 // ---------------------------------------------------------------------------- 79 /** @brief Destructor */ 80 ~VertexTriangleAdjacency(); 81 82 // ---------------------------------------------------------------------------- 83 /** @brief Get all triangles adjacent to a vertex 84 * @param iVertIndex Index of the vertex 85 * @return A pointer to the adjacency list. */ GetAdjacentTriangles(unsigned int iVertIndex)86 unsigned int* GetAdjacentTriangles(unsigned int iVertIndex) const { 87 ai_assert(iVertIndex < mNumVertices); 88 return &mAdjacencyTable[ mOffsetTable[iVertIndex]]; 89 } 90 91 // ---------------------------------------------------------------------------- 92 /** @brief Get the number of triangles that are referenced by 93 * a vertex. This function returns a reference that can be modified 94 * @param iVertIndex Index of the vertex 95 * @return Number of referenced triangles */ GetNumTrianglesPtr(unsigned int iVertIndex)96 unsigned int& GetNumTrianglesPtr(unsigned int iVertIndex) { 97 ai_assert( iVertIndex < mNumVertices ); 98 ai_assert( nullptr != mLiveTriangles ); 99 return mLiveTriangles[iVertIndex]; 100 } 101 102 //! Offset table 103 unsigned int* mOffsetTable; 104 105 //! Adjacency table 106 unsigned int* mAdjacencyTable; 107 108 //! Table containing the number of referenced triangles per vertex 109 unsigned int* mLiveTriangles; 110 111 //! Debug: Number of referenced vertices 112 unsigned int mNumVertices; 113 }; 114 115 } //! ns Assimp 116 117 #endif // !! AI_VTADJACENCY_H_INC 118