fsCBezierPath.h

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/********************************************************************
*
*       Created:        2/5/2013   8:40
*
*       File:           fsCBezierPath.h
*
*       Author:         Martin P. King
*       
*       Purpose:        Stitched together Bezier curves to form  a more
*                               complex path
*
*********************************************************************/
 
#ifndef fsCBezierPathhdr
#define fsCBezierPathhdr
 
#include <vector>
#include "../fsBaseTypes.h"
#include "../fsVec2d.h"
 
 
class fsCBezierPath
{
public:
 
        fsVec2d startPosGet() const;
 
        fsVec2d update(fsS32 pElapsedMs);
 
        fsCBezierPath(const std::vector<fsVec2d>& pKnots, fsS32 pDuration);
        fsCBezierPath();
 
protected:
 
private:
 
        void knotLengthsCalculate();
 
        static fsF32 distanceBetweenKnots(const fsVec2d& pKnotA, const fsVec2d& pKnotB);
 
        static std::vector<fsF32> firstControlPointsGet(std::vector<fsF32> pRHS);
 
        static void curveControlPointsGet(
                std::vector<fsVec2d> pKnots,
                std::vector<fsVec2d>& pFirstControlPoints,
                std::vector<fsVec2d>& pSecondControlPoints);
 
        static fsVec2d pointOnBezierGet(fsF32 pTime,
                                        const fsVec2d& pP1,
                                        const fsVec2d& pP1Control,
                                        const fsVec2d& pP2Control,
                                        const fsVec2d& pP2);
 
        std::vector<fsVec2d> mKnots;
        std::vector<fsVec2d> mFirstControlPoints;
        std::vector<fsVec2d> mSecondControlPoints;
 
        fsS32 mCurrentKnot;
 
        fsF32 mKnotLenghtTotal;
        std::vector<fsF32> mKnotLenghts;
 
        fsS32 mDuration;
};
 
#endif