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source: code/branches/environment/src/external/bullet/BulletCollision/CollisionShapes/btStridingMeshInterface.cpp @ 8206

Last change on this file since 8206 was 5781, checked in by rgrieder, 15 years ago

Reverted trunk again. We might want to find a way to delete these revisions again (x3n's changes are still available as diff in the commit mails).

  • Property svn:eol-style set to native
File size: 4.8 KB
Line 
1/*
2Bullet Continuous Collision Detection and Physics Library
3Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
4
5This software is provided 'as-is', without any express or implied warranty.
6In no event will the authors be held liable for any damages arising from the use of this software.
7Permission is granted to anyone to use this software for any purpose,
8including commercial applications, and to alter it and redistribute it freely,
9subject to the following restrictions:
10
111. 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.
122. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
133. This notice may not be removed or altered from any source distribution.
14*/
15
16#include "btStridingMeshInterface.h"
17
18btStridingMeshInterface::~btStridingMeshInterface()
19{
20
21}
22
23
24void    btStridingMeshInterface::InternalProcessAllTriangles(btInternalTriangleIndexCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const
25{
26        (void)aabbMin;
27        (void)aabbMax;
28        int numtotalphysicsverts = 0;
29        int part,graphicssubparts = getNumSubParts();
30        const unsigned char * vertexbase;
31        const unsigned char * indexbase;
32        int indexstride;
33        PHY_ScalarType type;
34        PHY_ScalarType gfxindextype;
35        int stride,numverts,numtriangles;
36        int gfxindex;
37        btVector3 triangle[3];
38        btScalar* graphicsbase;
39
40        btVector3 meshScaling = getScaling();
41
42        ///if the number of parts is big, the performance might drop due to the innerloop switch on indextype
43        for (part=0;part<graphicssubparts ;part++)
44        {
45                getLockedReadOnlyVertexIndexBase(&vertexbase,numverts,type,stride,&indexbase,indexstride,numtriangles,gfxindextype,part);
46                numtotalphysicsverts+=numtriangles*3; //upper bound
47
48                switch (gfxindextype)
49                {
50                case PHY_INTEGER:
51                        {
52                                for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
53                                {
54                                        unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride);
55                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[0]*stride);
56                                        triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
57                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[1]*stride);
58                                        triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),     graphicsbase[2]*meshScaling.getZ());
59                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[2]*stride);
60                                        triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),     graphicsbase[2]*meshScaling.getZ());
61                                        callback->internalProcessTriangleIndex(triangle,part,gfxindex);
62                                }
63                                break;
64                        }
65                case PHY_SHORT:
66                        {
67                                for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
68                                {
69                                        unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride);
70                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[0]*stride);
71                                        triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
72                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[1]*stride);
73                                        triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),     graphicsbase[2]*meshScaling.getZ());
74                                        graphicsbase = (btScalar*)(vertexbase+tri_indices[2]*stride);
75                                        triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),     graphicsbase[2]*meshScaling.getZ());
76                                        callback->internalProcessTriangleIndex(triangle,part,gfxindex);
77                                }
78                                break;
79                        }
80                default:
81                        btAssert((gfxindextype == PHY_INTEGER) || (gfxindextype == PHY_SHORT));
82                }
83
84                unLockReadOnlyVertexBase(part);
85        }
86}
87
88void    btStridingMeshInterface::calculateAabbBruteForce(btVector3& aabbMin,btVector3& aabbMax)
89{
90
91        struct  AabbCalculationCallback : public btInternalTriangleIndexCallback
92        {
93                btVector3       m_aabbMin;
94                btVector3       m_aabbMax;
95
96                AabbCalculationCallback()
97                {
98                        m_aabbMin.setValue(btScalar(1e30),btScalar(1e30),btScalar(1e30));
99                        m_aabbMax.setValue(btScalar(-1e30),btScalar(-1e30),btScalar(-1e30));
100                }
101
102                virtual void internalProcessTriangleIndex(btVector3* triangle,int partId,int  triangleIndex)
103                {
104                        (void)partId;
105                        (void)triangleIndex;
106
107                        m_aabbMin.setMin(triangle[0]);
108                        m_aabbMax.setMax(triangle[0]);
109                        m_aabbMin.setMin(triangle[1]);
110                        m_aabbMax.setMax(triangle[1]);
111                        m_aabbMin.setMin(triangle[2]);
112                        m_aabbMax.setMax(triangle[2]);
113                }
114        };
115
116                //first calculate the total aabb for all triangles
117        AabbCalculationCallback aabbCallback;
118        aabbMin.setValue(btScalar(-1e30),btScalar(-1e30),btScalar(-1e30));
119        aabbMax.setValue(btScalar(1e30),btScalar(1e30),btScalar(1e30));
120        InternalProcessAllTriangles(&aabbCallback,aabbMin,aabbMax);
121
122        aabbMin = aabbCallback.m_aabbMin;
123        aabbMax = aabbCallback.m_aabbMax;
124}
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