source: code/trunk/src/external/bullet/BulletCollision/CollisionShapes/btCollisionShape.h @ 12005

/*
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 BT_COLLISION_SHAPE_H
#define BT_COLLISION_SHAPE_H

#include "LinearMath/btTransform.h"
#include "LinearMath/btVector3.h"
#include "LinearMath/btMatrix3x3.h"
#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" //for the shape types
class btSerializer;


///The btCollisionShape class provides an interface for collision shapes that can be shared among btCollisionObjects.
class btCollisionShape
{
protected:
        int m_shapeType;
        void* m_userPointer;

public:

        btCollisionShape() : m_shapeType (INVALID_SHAPE_PROXYTYPE), m_userPointer(0)
        {
        }

        virtual ~btCollisionShape()
        {
        }

        ///getAabb returns the axis aligned bounding box in the coordinate frame of the given transform t.
        virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const =0;

        virtual void    getBoundingSphere(btVector3& center,btScalar& radius) const;

        ///getAngularMotionDisc returns the maximus radius needed for Conservative Advancement to handle time-of-impact with rotations.
        virtual btScalar        getAngularMotionDisc() const;

        virtual btScalar        getContactBreakingThreshold(btScalar defaultContactThresholdFactor) const;


        ///calculateTemporalAabb calculates the enclosing aabb for the moving object over interval [0..timeStep)
        ///result is conservative
        void calculateTemporalAabb(const btTransform& curTrans,const btVector3& linvel,const btVector3& angvel,btScalar timeStep, btVector3& temporalAabbMin,btVector3& temporalAabbMax) const;



        SIMD_FORCE_INLINE bool  isPolyhedral() const
        {
                return btBroadphaseProxy::isPolyhedral(getShapeType());
        }

        SIMD_FORCE_INLINE bool  isConvex2d() const
        {
                return btBroadphaseProxy::isConvex2d(getShapeType());
        }

        SIMD_FORCE_INLINE bool  isConvex() const
        {
                return btBroadphaseProxy::isConvex(getShapeType());
        }
        SIMD_FORCE_INLINE bool  isNonMoving() const
        {
                return btBroadphaseProxy::isNonMoving(getShapeType());
        }
        SIMD_FORCE_INLINE bool  isConcave() const
        {
                return btBroadphaseProxy::isConcave(getShapeType());
        }
        SIMD_FORCE_INLINE bool  isCompound() const
        {
                return btBroadphaseProxy::isCompound(getShapeType());
        }

        SIMD_FORCE_INLINE bool  isSoftBody() const
        {
                return btBroadphaseProxy::isSoftBody(getShapeType());
        }

        ///isInfinite is used to catch simulation error (aabb check)
        SIMD_FORCE_INLINE bool isInfinite() const
        {
                return btBroadphaseProxy::isInfinite(getShapeType());
        }

#ifndef __SPU__
        virtual void    setLocalScaling(const btVector3& scaling) =0;
        virtual const btVector3& getLocalScaling() const =0;
        virtual void    calculateLocalInertia(btScalar mass,btVector3& inertia) const = 0;


//debugging support
        virtual const char*     getName()const =0 ;
#endif //__SPU__

        
        int             getShapeType() const { return m_shapeType; }
        virtual void    setMargin(btScalar margin) = 0;
        virtual btScalar        getMargin() const = 0;

        
        ///optional user data pointer
        void    setUserPointer(void*  userPtr)
        {
                m_userPointer = userPtr;
        }

        void*   getUserPointer() const
        {
                return m_userPointer;
        }

        virtual int     calculateSerializeBufferSize() const;

        ///fills the dataBuffer and returns the struct name (and 0 on failure)
        virtual const char*     serialize(void* dataBuffer, btSerializer* serializer) const;

        virtual void    serializeSingleShape(btSerializer* serializer) const;

};      

///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
struct  btCollisionShapeData
{
        char    *m_name;
        int             m_shapeType;
        char    m_padding[4];
};

SIMD_FORCE_INLINE       int     btCollisionShape::calculateSerializeBufferSize() const
{
        return sizeof(btCollisionShapeData);
}



#endif //BT_COLLISION_SHAPE_H