Bullet Collision Detection & Physics Library
btTriangleIndexVertexArray.h
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1 /*
2 Bullet Continuous Collision Detection and Physics Library
3 Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
4 
5 This software is provided 'as-is', without any express or implied warranty.
6 In no event will the authors be held liable for any damages arising from the use of this software.
7 Permission is granted to anyone to use this software for any purpose,
8 including commercial applications, and to alter it and redistribute it freely,
9 subject to the following restrictions:
10 
11 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.
12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
13 3. This notice may not be removed or altered from any source distribution.
14 */
15 
16 #ifndef BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
17 #define BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
18 
21 #include "LinearMath/btScalar.h"
22 
27 {
29 
31  const unsigned char* m_triangleIndexBase;
32  // Size in byte of the indices for one triangle (3*sizeof(index_type) if the indices are tightly packed)
35  const unsigned char* m_vertexBase;
36  // Size of a vertex, in bytes
38 
39  // The index type is set when adding an indexed mesh to the
40  // btTriangleIndexVertexArray, do not set it manually
42 
43  // The vertex type has a default type similar to Bullet's precision mode (float or double)
44  // but can be set manually if you for example run Bullet with double precision but have
45  // mesh data in single precision..
47 
49  : m_indexType(PHY_INTEGER),
50 #ifdef BT_USE_DOUBLE_PRECISION
51  m_vertexType(PHY_DOUBLE)
52 #else // BT_USE_DOUBLE_PRECISION
53  m_vertexType(PHY_FLOAT)
54 #endif // BT_USE_DOUBLE_PRECISION
55  {
56  }
57 };
58 
60 
67 {
68 protected:
70  int m_pad[2];
71  mutable int m_hasAabb; // using int instead of bool to maintain alignment
74 
75 public:
77 
78  btTriangleIndexVertexArray() : m_hasAabb(0)
79  {
80  }
81 
82  virtual ~btTriangleIndexVertexArray();
83 
84  //just to be backwards compatible
85  btTriangleIndexVertexArray(int numTriangles, int* triangleIndexBase, int triangleIndexStride, int numVertices, btScalar* vertexBase, int vertexStride);
86 
87  void addIndexedMesh(const btIndexedMesh& mesh, PHY_ScalarType indexType = PHY_INTEGER)
88  {
89  m_indexedMeshes.push_back(mesh);
90  m_indexedMeshes[m_indexedMeshes.size() - 1].m_indexType = indexType;
91  }
92 
93  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);
94 
95  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;
96 
99  virtual void unLockVertexBase(int subpart) { (void)subpart; }
100 
101  virtual void unLockReadOnlyVertexBase(int subpart) const { (void)subpart; }
102 
105  virtual int getNumSubParts() const
106  {
107  return (int)m_indexedMeshes.size();
108  }
109 
111  {
112  return m_indexedMeshes;
113  }
114 
116  {
117  return m_indexedMeshes;
118  }
119 
120  virtual void preallocateVertices(int numverts) { (void)numverts; }
121  virtual void preallocateIndices(int numindices) { (void)numindices; }
122 
123  virtual bool hasPremadeAabb() const;
124  virtual void setPremadeAabb(const btVector3& aabbMin, const btVector3& aabbMax) const;
125  virtual void getPremadeAabb(btVector3 * aabbMin, btVector3 * aabbMax) const;
126 };
127 
128 #endif //BT_TRIANGLE_INDEX_VERTEX_ARRAY_H
PHY_ScalarType
PHY_ScalarType enumerates possible scalar types.
@ PHY_FLOAT
@ PHY_DOUBLE
@ PHY_INTEGER
float btScalar
The btScalar type abstracts floating point numbers, to easily switch between double and single floati...
Definition: btScalar.h:314
#define ATTRIBUTE_ALIGNED16(a)
Definition: btScalar.h:99
btAlignedObjectArray< btIndexedMesh > IndexedMeshArray
int size() const
return the number of elements in the array
void push_back(const T &_Val)
The btStridingMeshInterface is the interface class for high performance generic access to triangle me...
The btTriangleIndexVertexArray allows to access multiple triangle meshes, by indexing into existing t...
virtual void unLockVertexBase(int subpart)
unLockVertexBase finishes the access to a subpart of the triangle mesh make a call to unLockVertexBas...
void addIndexedMesh(const btIndexedMesh &mesh, PHY_ScalarType indexType=PHY_INTEGER)
virtual void unLockReadOnlyVertexBase(int subpart) const
virtual int getNumSubParts() const
getNumSubParts returns the number of separate subparts each subpart has a continuous array of vertice...
virtual void preallocateIndices(int numindices)
const IndexedMeshArray & getIndexedMeshArray() const
virtual void preallocateVertices(int numverts)
btVector3 can be used to represent 3D points and vectors.
Definition: btVector3.h:82
The btIndexedMesh indexes a single vertex and index array.
PHY_ScalarType m_indexType
const unsigned char * m_vertexBase
BT_DECLARE_ALIGNED_ALLOCATOR()
const unsigned char * m_triangleIndexBase
PHY_ScalarType m_vertexType