129 lines
5.1 KiB
C++
129 lines
5.1 KiB
C++
/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
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#define BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
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#include "btStridingMeshInterface.h"
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#include "LinearMath/btAlignedObjectArray.h"
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#include "LinearMath/btScalar.h"
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///The btIndexedMesh indexes a single vertex and index array. Multiple btIndexedMesh objects can be passed into a btTriangleIndexVertexArray using addIndexedMesh.
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///Instead of the number of indices, we pass the number of triangles.
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ATTRIBUTE_ALIGNED16(struct)
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btIndexedMesh
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{
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BT_DECLARE_ALIGNED_ALLOCATOR();
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int m_numTriangles;
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const unsigned char* m_triangleIndexBase;
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// Size in byte of the indices for one triangle (3*sizeof(index_type) if the indices are tightly packed)
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int m_triangleIndexStride;
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int m_numVertices;
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const unsigned char* m_vertexBase;
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// Size of a vertex, in bytes
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int m_vertexStride;
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// The index type is set when adding an indexed mesh to the
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// btTriangleIndexVertexArray, do not set it manually
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PHY_ScalarType m_indexType;
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// The vertex type has a default type similar to Bullet's precision mode (float or double)
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// but can be set manually if you for example run Bullet with double precision but have
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// mesh data in single precision..
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PHY_ScalarType m_vertexType;
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btIndexedMesh()
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: m_indexType(PHY_INTEGER),
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#ifdef BT_USE_DOUBLE_PRECISION
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m_vertexType(PHY_DOUBLE)
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#else // BT_USE_DOUBLE_PRECISION
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m_vertexType(PHY_FLOAT)
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#endif // BT_USE_DOUBLE_PRECISION
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{
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}
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};
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typedef btAlignedObjectArray<btIndexedMesh> IndexedMeshArray;
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///The btTriangleIndexVertexArray allows to access multiple triangle meshes, by indexing into existing triangle/index arrays.
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///Additional meshes can be added using addIndexedMesh
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///No duplicate is made of the vertex/index data, it only indexes into external vertex/index arrays.
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///So keep those arrays around during the lifetime of this btTriangleIndexVertexArray.
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ATTRIBUTE_ALIGNED16(class)
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btTriangleIndexVertexArray : public btStridingMeshInterface
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{
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protected:
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IndexedMeshArray m_indexedMeshes;
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int m_pad[2];
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mutable int m_hasAabb; // using int instead of bool to maintain alignment
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mutable btVector3 m_aabbMin;
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mutable btVector3 m_aabbMax;
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public:
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BT_DECLARE_ALIGNED_ALLOCATOR();
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btTriangleIndexVertexArray() : m_hasAabb(0)
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{
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}
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virtual ~btTriangleIndexVertexArray();
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//just to be backwards compatible
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btTriangleIndexVertexArray(int numTriangles, int* triangleIndexBase, int triangleIndexStride, int numVertices, btScalar* vertexBase, int vertexStride);
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void addIndexedMesh(const btIndexedMesh& mesh, PHY_ScalarType indexType = PHY_INTEGER)
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{
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m_indexedMeshes.push_back(mesh);
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m_indexedMeshes[m_indexedMeshes.size() - 1].m_indexType = indexType;
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}
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virtual void getLockedVertexIndexBase(unsigned char** vertexbase, int& numverts, PHY_ScalarType& type, int& vertexStride, unsigned char** indexbase, int& indexstride, int& numfaces, PHY_ScalarType& indicestype, int subpart = 0);
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virtual void getLockedReadOnlyVertexIndexBase(const unsigned char** vertexbase, int& numverts, PHY_ScalarType& type, int& vertexStride, const unsigned char** indexbase, int& indexstride, int& numfaces, PHY_ScalarType& indicestype, int subpart = 0) const;
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/// unLockVertexBase finishes the access to a subpart of the triangle mesh
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/// make a call to unLockVertexBase when the read and write access (using getLockedVertexIndexBase) is finished
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virtual void unLockVertexBase(int subpart) { (void)subpart; }
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virtual void unLockReadOnlyVertexBase(int subpart) const { (void)subpart; }
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/// getNumSubParts returns the number of seperate subparts
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/// each subpart has a continuous array of vertices and indices
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virtual int getNumSubParts() const
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{
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return (int)m_indexedMeshes.size();
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}
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IndexedMeshArray& getIndexedMeshArray()
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{
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return m_indexedMeshes;
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}
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const IndexedMeshArray& getIndexedMeshArray() const
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{
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return m_indexedMeshes;
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}
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virtual void preallocateVertices(int numverts) { (void)numverts; }
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virtual void preallocateIndices(int numindices) { (void)numindices; }
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virtual bool hasPremadeAabb() const;
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virtual void setPremadeAabb(const btVector3& aabbMin, const btVector3& aabbMax) const;
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virtual void getPremadeAabb(btVector3 * aabbMin, btVector3 * aabbMax) const;
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};
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#endif //BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
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