btTriangleInfoMap.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2010 Erwin Coumans  http://bulletphysics.org

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.
*/

#ifndef _BT_TRIANGLE_INFO_MAP_H
#define _BT_TRIANGLE_INFO_MAP_H


#include "LinearMath/btHashMap.h"
#include "LinearMath/btSerializer.h"


#define TRI_INFO_V0V1_CONVEX 1
#define TRI_INFO_V1V2_CONVEX 2
#define TRI_INFO_V2V0_CONVEX 4

#define TRI_INFO_V0V1_SWAP_NORMALB 8
#define TRI_INFO_V1V2_SWAP_NORMALB 16
#define TRI_INFO_V2V0_SWAP_NORMALB 32


struct  btTriangleInfo
{
    btTriangleInfo()
    {
        m_edgeV0V1Angle = SIMD_2_PI;
        m_edgeV1V2Angle = SIMD_2_PI;
        m_edgeV2V0Angle = SIMD_2_PI;
        m_flags=0;
    }

    int         m_flags;

    btScalar    m_edgeV0V1Angle;
    btScalar    m_edgeV1V2Angle;
    btScalar    m_edgeV2V0Angle;

};

typedef btHashMap<btHashInt,btTriangleInfo> btInternalTriangleInfoMap;


struct  btTriangleInfoMap : public btInternalTriangleInfoMap
{
    btScalar    m_convexEpsilon;
    btScalar    m_planarEpsilon; 
    btScalar    m_equalVertexThreshold; 
    btScalar    m_edgeDistanceThreshold; 
    btScalar    m_zeroAreaThreshold; 
    
    
    btTriangleInfoMap()
    {
        m_convexEpsilon = 0.00f;
        m_planarEpsilon = 0.0001f;
        m_equalVertexThreshold = btScalar(0.0001)*btScalar(0.0001);
        m_edgeDistanceThreshold = btScalar(0.1);
        m_zeroAreaThreshold = btScalar(0.0001)*btScalar(0.0001);
    }
    virtual ~btTriangleInfoMap() {}

    virtual int calculateSerializeBufferSize() const;

    virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const;

    void    deSerialize(struct btTriangleInfoMapData& data);

};

struct  btTriangleInfoData
{
    int         m_flags;
    float   m_edgeV0V1Angle;
    float   m_edgeV1V2Angle;
    float   m_edgeV2V0Angle;
};

struct  btTriangleInfoMapData
{
    int                 *m_hashTablePtr;
    int                 *m_nextPtr;
    btTriangleInfoData  *m_valueArrayPtr;
    int                 *m_keyArrayPtr;

    float   m_convexEpsilon;
    float   m_planarEpsilon;
    float   m_equalVertexThreshold; 
    float   m_edgeDistanceThreshold;
    float   m_zeroAreaThreshold;

    int     m_nextSize;
    int     m_hashTableSize;
    int     m_numValues;
    int     m_numKeys;
    char    m_padding[4];
};

SIMD_FORCE_INLINE   int btTriangleInfoMap::calculateSerializeBufferSize() const
{
    return sizeof(btTriangleInfoMapData);
}

SIMD_FORCE_INLINE   const char* btTriangleInfoMap::serialize(void* dataBuffer, btSerializer* serializer) const
{
    btTriangleInfoMapData* tmapData = (btTriangleInfoMapData*) dataBuffer;
    tmapData->m_convexEpsilon = m_convexEpsilon;
    tmapData->m_planarEpsilon = m_planarEpsilon;
    tmapData->m_equalVertexThreshold = m_equalVertexThreshold;
    tmapData->m_edgeDistanceThreshold = m_edgeDistanceThreshold;
    tmapData->m_zeroAreaThreshold = m_zeroAreaThreshold;
    
    tmapData->m_hashTableSize = m_hashTable.size();

    tmapData->m_hashTablePtr = tmapData->m_hashTableSize ? (int*)serializer->getUniquePointer((void*)&m_hashTable[0]) : 0;
    if (tmapData->m_hashTablePtr)
    { 
        //serialize an int buffer
        int sz = sizeof(int);
        int numElem = tmapData->m_hashTableSize;
        btChunk* chunk = serializer->allocate(sz,numElem);
        int* memPtr = (int*)chunk->m_oldPtr;
        for (int i=0;i<numElem;i++,memPtr++)
        {
            *memPtr = m_hashTable[i];
        }
        serializer->finalizeChunk(chunk,"int",BT_ARRAY_CODE,(void*)&m_hashTable[0]);

    }

    tmapData->m_nextSize = m_next.size();
    tmapData->m_nextPtr = tmapData->m_nextSize? (int*)serializer->getUniquePointer((void*)&m_next[0]): 0;
    if (tmapData->m_nextPtr)
    {
        int sz = sizeof(int);
        int numElem = tmapData->m_nextSize;
        btChunk* chunk = serializer->allocate(sz,numElem);
        int* memPtr = (int*)chunk->m_oldPtr;
        for (int i=0;i<numElem;i++,memPtr++)
        {
            *memPtr = m_next[i];
        }
        serializer->finalizeChunk(chunk,"int",BT_ARRAY_CODE,(void*)&m_next[0]);
    }
    
    tmapData->m_numValues = m_valueArray.size();
    tmapData->m_valueArrayPtr = tmapData->m_numValues ? (btTriangleInfoData*)serializer->getUniquePointer((void*)&m_valueArray[0]): 0;
    if (tmapData->m_valueArrayPtr)
    {
        int sz = sizeof(btTriangleInfoData);
        int numElem = tmapData->m_numValues;
        btChunk* chunk = serializer->allocate(sz,numElem);
        btTriangleInfoData* memPtr = (btTriangleInfoData*)chunk->m_oldPtr;
        for (int i=0;i<numElem;i++,memPtr++)
        {
            memPtr->m_edgeV0V1Angle = m_valueArray[i].m_edgeV0V1Angle;
            memPtr->m_edgeV1V2Angle = m_valueArray[i].m_edgeV1V2Angle;
            memPtr->m_edgeV2V0Angle = m_valueArray[i].m_edgeV2V0Angle;
            memPtr->m_flags = m_valueArray[i].m_flags;
        }
        serializer->finalizeChunk(chunk,"btTriangleInfoData",BT_ARRAY_CODE,(void*) &m_valueArray[0]);
    }
    
    tmapData->m_numKeys = m_keyArray.size();
    tmapData->m_keyArrayPtr = tmapData->m_numKeys ? (int*)serializer->getUniquePointer((void*)&m_keyArray[0]) : 0;
    if (tmapData->m_keyArrayPtr)
    {
        int sz = sizeof(int);
        int numElem = tmapData->m_numValues;
        btChunk* chunk = serializer->allocate(sz,numElem);
        int* memPtr = (int*)chunk->m_oldPtr;
        for (int i=0;i<numElem;i++,memPtr++)
        {
            *memPtr = m_keyArray[i].getUid1();
        }
        serializer->finalizeChunk(chunk,"int",BT_ARRAY_CODE,(void*) &m_keyArray[0]);

    }
    return "btTriangleInfoMapData";
}



SIMD_FORCE_INLINE   void    btTriangleInfoMap::deSerialize(btTriangleInfoMapData& tmapData )
{


    m_convexEpsilon = tmapData.m_convexEpsilon;
    m_planarEpsilon = tmapData.m_planarEpsilon;
    m_equalVertexThreshold = tmapData.m_equalVertexThreshold;
    m_edgeDistanceThreshold = tmapData.m_edgeDistanceThreshold;
    m_zeroAreaThreshold = tmapData.m_zeroAreaThreshold;
    m_hashTable.resize(tmapData.m_hashTableSize);
    int i =0;
    for (i=0;i<tmapData.m_hashTableSize;i++)
    {
        m_hashTable[i] = tmapData.m_hashTablePtr[i];
    }
    m_next.resize(tmapData.m_nextSize);
    for (i=0;i<tmapData.m_nextSize;i++)
    {
        m_next[i] = tmapData.m_nextPtr[i];
    }
    m_valueArray.resize(tmapData.m_numValues);
    for (i=0;i<tmapData.m_numValues;i++)
    {
        m_valueArray[i].m_edgeV0V1Angle = tmapData.m_valueArrayPtr[i].m_edgeV0V1Angle;
        m_valueArray[i].m_edgeV1V2Angle = tmapData.m_valueArrayPtr[i].m_edgeV1V2Angle;
        m_valueArray[i].m_edgeV2V0Angle = tmapData.m_valueArrayPtr[i].m_edgeV2V0Angle;
        m_valueArray[i].m_flags = tmapData.m_valueArrayPtr[i].m_flags;
    }
    
    m_keyArray.resize(tmapData.m_numKeys,btHashInt(0));
    for (i=0;i<tmapData.m_numKeys;i++)
    {
        m_keyArray[i].setUid1(tmapData.m_keyArrayPtr[i]);
    }
}


#endif //_BT_TRIANGLE_INFO_MAP_H