118 lines
4.5 KiB
C++
118 lines
4.5 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2020, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file Defines a helper class to compute a vertex-triangle adjacency map */
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#ifndef AI_VTADJACENCY_H_INC
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#define AI_VTADJACENCY_H_INC
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#include "BaseProcess.h"
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#include <assimp/types.h>
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#include <assimp/ai_assert.h>
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struct aiMesh;
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struct aiFace;
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namespace Assimp {
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// --------------------------------------------------------------------------------------------
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/** @brief The VertexTriangleAdjacency class computes a vertex-triangle
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* adjacency map from a given index buffer.
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*
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* @note Although it is called #VertexTriangleAdjacency, the current version does also
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* support arbitrary polygons. */
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// --------------------------------------------------------------------------------------------
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class ASSIMP_API VertexTriangleAdjacency {
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public:
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// ----------------------------------------------------------------------------
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/** @brief Construction from an existing index buffer
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* @param pcFaces Index buffer
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* @param iNumFaces Number of faces in the buffer
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* @param iNumVertices Number of referenced vertices. This value
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* is computed automatically if 0 is specified.
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* @param bComputeNumTriangles If you want the class to compute
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* a list containing the number of referenced triangles per vertex
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* per vertex - pass true. */
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VertexTriangleAdjacency(aiFace* pcFaces,unsigned int iNumFaces,
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unsigned int iNumVertices = 0,
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bool bComputeNumTriangles = true);
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// ----------------------------------------------------------------------------
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/** @brief Destructor */
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~VertexTriangleAdjacency();
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// ----------------------------------------------------------------------------
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/** @brief Get all triangles adjacent to a vertex
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* @param iVertIndex Index of the vertex
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* @return A pointer to the adjacency list. */
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unsigned int* GetAdjacentTriangles(unsigned int iVertIndex) const {
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ai_assert(iVertIndex < mNumVertices);
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return &mAdjacencyTable[ mOffsetTable[iVertIndex]];
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}
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// ----------------------------------------------------------------------------
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/** @brief Get the number of triangles that are referenced by
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* a vertex. This function returns a reference that can be modified
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* @param iVertIndex Index of the vertex
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* @return Number of referenced triangles */
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unsigned int& GetNumTrianglesPtr(unsigned int iVertIndex) {
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ai_assert( iVertIndex < mNumVertices );
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ai_assert( nullptr != mLiveTriangles );
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return mLiveTriangles[iVertIndex];
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}
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//! Offset table
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unsigned int* mOffsetTable;
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//! Adjacency table
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unsigned int* mAdjacencyTable;
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//! Table containing the number of referenced triangles per vertex
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unsigned int* mLiveTriangles;
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//! Debug: Number of referenced vertices
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unsigned int mNumVertices;
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};
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} //! ns Assimp
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#endif // !! AI_VTADJACENCY_H_INC
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