btPolyhedralConvexShape.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2009 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 BU_SHAPE
#define BU_SHAPE

#include "LinearMath/btMatrix3x3.h"
#include "btConvexInternalShape.h"


class btPolyhedralConvexShape : public btConvexInternalShape
{

protected:
    
public:

    btPolyhedralConvexShape();

    //brute force implementations

    virtual btVector3   localGetSupportingVertexWithoutMargin(const btVector3& vec)const;
    virtual void    batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const;
    
    virtual void    calculateLocalInertia(btScalar mass,btVector3& inertia) const;
    
    
    virtual int getNumVertices() const = 0 ;
    virtual int getNumEdges() const = 0;
    virtual void getEdge(int i,btVector3& pa,btVector3& pb) const = 0;
    virtual void getVertex(int i,btVector3& vtx) const = 0;
    virtual int getNumPlanes() const = 0;
    virtual void getPlane(btVector3& planeNormal,btVector3& planeSupport,int i ) const = 0;
//  virtual int getIndex(int i) const = 0 ; 

    virtual bool isInside(const btVector3& pt,btScalar tolerance) const = 0;
    
};


class btPolyhedralConvexAabbCachingShape : public btPolyhedralConvexShape
{

    btVector3   m_localAabbMin;
    btVector3   m_localAabbMax;
    bool        m_isLocalAabbValid;
        
protected:

    void setCachedLocalAabb (const btVector3& aabbMin, const btVector3& aabbMax)
    {
        m_isLocalAabbValid = true;
        m_localAabbMin = aabbMin;
        m_localAabbMax = aabbMax;
    }

    inline void getCachedLocalAabb (btVector3& aabbMin, btVector3& aabbMax) const
    {
        btAssert(m_isLocalAabbValid);
        aabbMin = m_localAabbMin;
        aabbMax = m_localAabbMax;
    }

public:

    btPolyhedralConvexAabbCachingShape();
    
    inline void getNonvirtualAabb(const btTransform& trans,btVector3& aabbMin,btVector3& aabbMax, btScalar margin) const
    {

        //lazy evaluation of local aabb
        btAssert(m_isLocalAabbValid);
        btTransformAabb(m_localAabbMin,m_localAabbMax,margin,trans,aabbMin,aabbMax);
    }

    virtual void    setLocalScaling(const btVector3& scaling);

    virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const;

    void    recalcLocalAabb();

};

#endif //BU_SHAPE