1 /* 2 Bullet Continuous Collision Detection and Physics Library 3 Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ 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_SOFT_BODY_SOLVER_VERTEX_BUFFER_H 17 #define BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H 18 19 20 class btVertexBufferDescriptor 21 { 22 public: 23 enum BufferTypes 24 { 25 CPU_BUFFER, 26 DX11_BUFFER, 27 OPENGL_BUFFER 28 }; 29 30 protected: 31 32 bool m_hasVertexPositions; 33 bool m_hasNormals; 34 35 int m_vertexOffset; 36 int m_vertexStride; 37 38 int m_normalOffset; 39 int m_normalStride; 40 41 public: btVertexBufferDescriptor()42 btVertexBufferDescriptor() 43 { 44 m_hasVertexPositions = false; 45 m_hasNormals = false; 46 m_vertexOffset = 0; 47 m_vertexStride = 0; 48 m_normalOffset = 0; 49 m_normalStride = 0; 50 } 51 ~btVertexBufferDescriptor()52 virtual ~btVertexBufferDescriptor() 53 { 54 55 } 56 hasVertexPositions()57 virtual bool hasVertexPositions() const 58 { 59 return m_hasVertexPositions; 60 } 61 hasNormals()62 virtual bool hasNormals() const 63 { 64 return m_hasNormals; 65 } 66 67 /** 68 * Return the type of the vertex buffer descriptor. 69 */ 70 virtual BufferTypes getBufferType() const = 0; 71 72 /** 73 * Return the vertex offset in floats from the base pointer. 74 */ getVertexOffset()75 virtual int getVertexOffset() const 76 { 77 return m_vertexOffset; 78 } 79 80 /** 81 * Return the vertex stride in number of floats between vertices. 82 */ getVertexStride()83 virtual int getVertexStride() const 84 { 85 return m_vertexStride; 86 } 87 88 /** 89 * Return the vertex offset in floats from the base pointer. 90 */ getNormalOffset()91 virtual int getNormalOffset() const 92 { 93 return m_normalOffset; 94 } 95 96 /** 97 * Return the vertex stride in number of floats between vertices. 98 */ getNormalStride()99 virtual int getNormalStride() const 100 { 101 return m_normalStride; 102 } 103 }; 104 105 106 class btCPUVertexBufferDescriptor : public btVertexBufferDescriptor 107 { 108 protected: 109 float *m_basePointer; 110 111 public: 112 /** 113 * vertexBasePointer is pointer to beginning of the buffer. 114 * vertexOffset is the offset in floats to the first vertex. 115 * vertexStride is the stride in floats between vertices. 116 */ btCPUVertexBufferDescriptor(float * basePointer,int vertexOffset,int vertexStride)117 btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride ) 118 { 119 m_basePointer = basePointer; 120 m_vertexOffset = vertexOffset; 121 m_vertexStride = vertexStride; 122 m_hasVertexPositions = true; 123 } 124 125 /** 126 * vertexBasePointer is pointer to beginning of the buffer. 127 * vertexOffset is the offset in floats to the first vertex. 128 * vertexStride is the stride in floats between vertices. 129 */ btCPUVertexBufferDescriptor(float * basePointer,int vertexOffset,int vertexStride,int normalOffset,int normalStride)130 btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride, int normalOffset, int normalStride ) 131 { 132 m_basePointer = basePointer; 133 134 m_vertexOffset = vertexOffset; 135 m_vertexStride = vertexStride; 136 m_hasVertexPositions = true; 137 138 m_normalOffset = normalOffset; 139 m_normalStride = normalStride; 140 m_hasNormals = true; 141 } 142 ~btCPUVertexBufferDescriptor()143 virtual ~btCPUVertexBufferDescriptor() 144 { 145 146 } 147 148 /** 149 * Return the type of the vertex buffer descriptor. 150 */ getBufferType()151 virtual BufferTypes getBufferType() const 152 { 153 return CPU_BUFFER; 154 } 155 156 /** 157 * Return the base pointer in memory to the first vertex. 158 */ getBasePointer()159 virtual float *getBasePointer() const 160 { 161 return m_basePointer; 162 } 163 }; 164 165 #endif // #ifndef BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H 166