True Axis Physics SDK 1.2.0.1 Beta Documentation
www.trueaxis.com

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CollisionShared.h

//---------------------------------------------------------------------------------
// File Name: CollisionShared.h
// Description:
//      Internally shared collision functions, structures and data.
//
// Copyright (C) 2004 - 2006 True Axis Pty Ltd, Australia. 
// All Rights Reserved.
//
// History:
//      Created File.
//---------------------------------------------------------------------------------

#ifndef TA_COLLISIONSHARED_H
#define TA_COLLISIONSHARED_H

#ifndef TA_MFRAME_H
#include "../Common/MFrame.h"
#endif // TA_MFRAME_H

#ifndef TA_COLLISION_H
#include "Collision.h"
#endif // TA_COLLISION_H

namespace TA
{

//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
bool TAC_CALL CollisionShared_NewCollision(Collision& collision, CollisionCallData* pCollisionCallbackData);

//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
bool TAC_CALL CollisionShared_NewCollisionWithComplex(Collision& collision, CollisionCallData* pCollisionCallbackData);

//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
int TAC_CALL CollisionShared_SolveQuartic(float fB, float fC, float fD, float fE, float pfRootList[4]);

//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
bool TAC_CALL CollisionShared_LineVsQuarterTorus(
    const Vec3& v3Line0,
    const Vec3& v3Line1,
    const Vec3& v3TorusCenter,
    const Vec3& v3TorusNormal,
    float fRadius1,
    float fRadius2,
    float& fResultTime,
    Vec3& v3ResultPos,
    Vec3& v3ResultNormal);

//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
inline int TAC_CALL CollisionShared_Next(int nValue, int nMaxValue) 
{ 
    int nNext = nValue + 1;
    if (nNext >= nMaxValue)
        nNext = 0;
    return nNext;
    // Could try the below code that avoids the if.
    // Although, surly branch prediction should work well in this case?
    //int nNext = nValue + 1;
    //((u32&)(nNext - nMaxValue) >> 31) * nNext
    //return nNext;
}
//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
inline int TAC_CALL CollisionShared_Prev(int nValue, int nMaxValue) 
{ 
    int nNext = nValue - 1;
    if (nNext < 0)
        nNext = nMaxValue - 1;
    return nNext;
}

}

#endif // TA_COLLISIONSHARED_H

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© Copyright 2004-2006 TRUE AXIS PTY LTD Australia. All rights reserved.