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

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Geometry.h

//---------------------------------------------------------------------------------
// File Name: Geometry.h
// Description: Misc geometric functions
//
// Copyright (C) 2004 - 2006 True Axis Pty Ltd, Australia. 
// All Rights Reserved.
//
// History:
//      Created File.
//---------------------------------------------------------------------------------

#ifndef TA_GEOMETRY_H
#define TA_GEOMETRY_H

#ifndef TA_COMMON_H
#include "Common.h"
#endif // TA_COMMON_H

TA_OBFUSCATION_SKIP_PASS_2

namespace TA
{

struct Vec2;
struct Vec3;

TA_OBFUSCATION_RESERVED_ON

class TACOMMON_CLASS Geometry
{
public:
    //---------------------------------------------------------------------------------
    // Returns: true if the line intersects the box
    //---------------------------------------------------------------------------------
    static bool TAC_CALL LineIntersectsBox(
        const Vec2& v2A,            // Line start
        const Vec2& v2B,            // Line end
        const Vec2& v2Center,       // Box center
        const Vec2& v2Extent);      // Box extents

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static float TAC_CALL CubicInterpolate(float fPosA, float fPosB, float fVelA, float fVelB, float fTime);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static Vec3 TAC_CALL CubicInterpolate(const Vec3& v3PosA, const Vec3& v3PosB, const Vec3& v3VelA, const Vec3& v3VelB, float fTime);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static float TAC_CALL CubicInterpolateGradient(float fPosA, float fPosB, float fVelA, float fVelB, float fTime);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestEdgeMovementAgainstEdge(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        const Vec3& v3C0,
        const Vec3& v3C1,
        float& fResultTime,
        Vec3& v3ResultPos,
        Vec3& v3ResultNormal);
    
    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestLineMovementAgainstCapsule(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        const Vec3& v3C0,
        const Vec3& v3C1,
        float fRadius,
        float& fResultTime,
        Vec3& v3ResultPos,
        Vec3& v3ResultNormal);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static void TAC_CALL Geometry::FindClosestPointOnLineToLine(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        Vec3& v3ResultPosOnA,
        Vec3& v3ResultPosOnB);
    
    //---------------------------------------------------------------------------------
    // returns false if the closet point between to lines is not on the line segments.
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::FindClosestPointOnLineToLineUnClamped(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        Vec3& v3ResultPosOnA,
        Vec3& v3ResultPosOnB);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestPointMovementAgainstSphere(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B,
        float fRadius,
        float& fResultTime,
        Vec3& v3ResultPos,
        Vec3& v3ResultNormal);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestSphereMovementAgainstLine(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        float fRadius,
        float& fResultTime,
        Vec3& v3ResultPos,
        Vec3& v3ResultNormal);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestLineMovementAgainstSphere(
        const Vec3& v3A0,
        const Vec3& v3A1,
        const Vec3& v3B0,
        const Vec3& v3B1,
        const Vec3& v3C,
        float fRadius,
        float& fResultTime,
        Vec3& v3ResultPos,
        Vec3& v3ResultNormal);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static Vec3 TAC_CALL Geometry::FindClosestPointOnLine(
        const Vec3& v3Point,
        const Vec3& v3LineA,
        const Vec3& v3LineB);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static float TAC_CALL Geometry::FindShortestDistanceToLineSqrd(
        const Vec3& v3Point,
        const Vec3& v3LineA,
        const Vec3& v3LineB);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static float TAC_CALL Geometry::FindShortestDistanceToLine(
        const Vec3& v3Point,
        const Vec3& v3LineA,
        const Vec3& v3LineB);

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::FindClosestPointOnLineUnClamped(
        const Vec3& v3Point,
        const Vec3& v3LineA,
        const Vec3& v3LineB,
        Vec3& v3ResultPos); 

    //---------------------------------------------------------------------------------
    //---------------------------------------------------------------------------------
    static bool TAC_CALL Geometry::TestPointAgainstCone(
        const Vec3& v3Point,
        const Vec3& v3LineA,
        const Vec3& v3LineB,
        float fRadius);
TA_OBFUSCATION_RESERVED_OFF
};

};

#endif // TA_GEOMETRY_H

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