/******************************************************************************** * ReactPhysics3D physics library, http://www.reactphysics3d.com * * Copyright (c) 2010-2018 Daniel Chappuis * ********************************************************************************* * * * This software is provided 'as-is', without any express or implied warranty. * * In no event will the authors be held liable for any damages arising from the * * use of this software. * * * * Permission is granted to anyone to use this software for any purpose, * * including commercial applications, and to alter it and redistribute it * * freely, subject to the following restrictions: * * * * 1. The origin of this software must not be misrepresented; you must not claim * * that you wrote the original software. If you use this software in a * * product, an acknowledgment in the product documentation would be * * appreciated but is not required. * * * * 2. Altered source versions must be plainly marked as such, and must not be * * misrepresented as being the original software. * * * * 3. This notice may not be removed or altered from any source distribution. * * * ********************************************************************************/ // Libraries #include "PolygonVertexArray.h" using namespace reactphysics3d; // Constructor /// Note that your data will not be copied into the PolygonVertexArray and /// therefore, you need to make sure that those data are always valid during /// the lifetime of the PolygonVertexArray. /** * @param nbVertices Number of vertices in the array * @param verticesStart Pointer to the start of the vertices data * @param verticesStride The number of bytes between two consecutive vertices in the array * @param indexesStart Pointer to the start of the face indices data * @param indexesStride The number of bytes between two consecutive face indices in the array * @param nbFaces The number of faces in the array * @param nbFaces Pointer to the start of the faces data * @param vertexDataType Data type of the vertices data * @param indexDataType Data type of the face indices data */ PolygonVertexArray::PolygonVertexArray(uint nbVertices, void* verticesStart, int verticesStride, void* indexesStart, int indexesStride, uint nbFaces, PolygonFace* facesStart, VertexDataType vertexDataType, IndexDataType indexDataType) { mNbVertices = nbVertices; mVerticesStart = reinterpret_cast(verticesStart); mVerticesStride = verticesStride; mIndicesStart = reinterpret_cast(indexesStart); mIndicesStride = indexesStride; mNbFaces = nbFaces; mPolygonFacesStart = facesStart; mVertexDataType = vertexDataType; mIndexDataType = indexDataType; } // Return the vertex index of a given vertex in a face /** * @return The index of a vertex (in the array of vertices data) of a given vertex in a face */ uint PolygonVertexArray::getVertexIndexInFace(uint faceIndex, uint noVertexInFace) const { assert(faceIndex < mNbFaces); // Get the face PolygonFace* face = getPolygonFace(faceIndex); assert(noVertexInFace < face->nbVertices); void* vertexIndexPointer = mIndicesStart + (face->indexBase + noVertexInFace) * mIndicesStride; if (mIndexDataType == PolygonVertexArray::IndexDataType::INDEX_INTEGER_TYPE) { return *((uint*)vertexIndexPointer); } else if (mIndexDataType == PolygonVertexArray::IndexDataType::INDEX_SHORT_TYPE) { return *((unsigned short*)vertexIndexPointer); } else { assert(false); } return 0; }