GxConvexConcaveCollisionAlgorithm.h

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//===========================================================================
//===========================================================================
#pragma once
 
class btDispatcher;
 
GX_PHYSICS_NAMESPACE_BEGIN()
//===========================================================================
//===========================================================================
class GxConvexTriangleCallback : public btTriangleCallback
{
    //-------------------------------------------------------------
    //-------------------------------------------------------------
public:
    GxConvexTriangleCallback(btDispatcher* pDispatcher, const btCollisionObjectWrapper* pBody0, const btCollisionObjectWrapper* pBody1, b32 isSwapped);
    ~GxConvexTriangleCallback(void) override;
 
private:
    // コピーコンストラクタ（※使用禁止）
    GxConvexTriangleCallback(const GxConvexTriangleCallback&);
    // 代入演算子（※使用禁止）
    GX_FORCE_INLINE const GxConvexTriangleCallback& operator=(const GxConvexTriangleCallback&);
 
    //-----------------------------------------------------------
    //-----------------------------------------------------------
public:
    void setTimeStepAndCounters(btScalar collisionMarginTriangle,const btDispatcherInfo& dispatchInfo, btManifoldResult* pResultOut);
    void processTriangle(btVector3* pTriangle, s32 partId, s32 triangleIndex) override;
    void clearCache(void);
    GX_FORCE_INLINE const btVector3& getAabbMin(void) const { return _aabbMin; }
    GX_FORCE_INLINE const btVector3& getAabbMax(void) const { return _aabbMax; }
 
    //-----------------------------------------------------------
    //-----------------------------------------------------------
public:
    s32                     _triangleCount;             
 
    btPersistentManifold*   _pManifold;                 
 
private:
    const btCollisionObjectWrapper* _pConvexBody;       
    const btCollisionObjectWrapper* _pTriBody;          
 
    btVector3               _aabbMin;                   
    btVector3               _aabbMax;                   
 
    btManifoldResult*       _pResultOut;                
    btDispatcher*           _pDispatcher;               
    const btDispatcherInfo* _pDispatchInfo;             
    btScalar                _collisionMarginTriangle;   
 
};
 
//===========================================================================
// GxConvexConcaveCollisionAlgorithm
// btConvexConcaveCollisionAlgorithmを流用
//===========================================================================
class GxConvexConcaveCollisionAlgorithm : public btActivatingCollisionAlgorithm
{
    //-------------------------------------------------------------
    //-------------------------------------------------------------
public:
    struct GxCreateFunction : public btCollisionAlgorithmCreateFunc
    {
        GX_FORCE_INLINE btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& constructionInfo, const btCollisionObjectWrapper* pBody0, const btCollisionObjectWrapper* pBody1) override
        {
            void* pMemory = btAlignedAlloc(sizeof(GxConvexConcaveCollisionAlgorithm), 16);
            return new (pMemory) GxConvexConcaveCollisionAlgorithm(constructionInfo, pBody0, pBody1, false);
        }
    };
 
    struct GxSwappedCreateFunction : public btCollisionAlgorithmCreateFunc
    {
        GX_FORCE_INLINE btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& constructionInfo, const btCollisionObjectWrapper* pBody0, const btCollisionObjectWrapper* pBody1) override
        {
            void* mem = btAlignedAlloc(sizeof(GxConvexConcaveCollisionAlgorithm), 16);
            return new (mem) GxConvexConcaveCollisionAlgorithm(constructionInfo, pBody0, pBody1, true);
        }
    };
 
    //-----------------------------------------------------------
    //-----------------------------------------------------------
 
    GxConvexConcaveCollisionAlgorithm( const btCollisionAlgorithmConstructionInfo& constructionInfo, const btCollisionObjectWrapper* pBody0, const btCollisionObjectWrapper* pBody1, b32 isSwapped);
    ~GxConvexConcaveCollisionAlgorithm(void) override;
private:
    GxConvexConcaveCollisionAlgorithm(const GxConvexConcaveCollisionAlgorithm&);
    GX_FORCE_INLINE const GxConvexConcaveCollisionAlgorithm& operator=(const GxConvexConcaveCollisionAlgorithm&);
 
    //-----------------------------------------------------------
    //-----------------------------------------------------------
public:
    void processCollision(const btCollisionObjectWrapper* pBody0, const btCollisionObjectWrapper* pBody1, const btDispatcherInfo& dispatchInfo, btManifoldResult* pResultOut) override;
    btScalar calculateTimeOfImpact(btCollisionObject* pBody0, btCollisionObject* pBody1, const btDispatcherInfo& dispatchInfo, btManifoldResult* pResultOut) override;
    void getAllContactManifolds(btManifoldArray& manifoldArray) override;
    void clearCache(void);
 
    //-----------------------------------------------------------
    //-----------------------------------------------------------
private:
    b32                         _isSwapped;                 
    // ここを自前コールバックに置き換えている
    GxConvexTriangleCallback    _btConvexTriangleCallback;  
 
};
GX_PHYSICS_NAMESPACE_END()