mgcbisect2.h

3D Game Engine Design Source Code非常棒

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// FREE SOURCE CODE
// http://www.magic-software.com/License/free.pdf

#ifndef MGCBISECT2_H
#define MGCBISECT2_H

#include "MgcMath.h"


class MgcBisect2
{
public:
    typedef MgcReal (*Function)(MgcReal,MgcReal);

    MgcBisect2 (Function oF, Function oG, int iMaxLevel, MgcReal fTolerance);

    bool Bisect (MgcReal fX0, MgcReal fY0, MgcReal fX1, MgcReal fY1,
        MgcReal& rfXRoot, MgcReal& rfYRoot);

private:
    class BisectNode
    {
    public:
        MgcReal m_fX, m_fY, m_fF, m_fG;
        BisectNode* m_pkXNext;
        BisectNode* m_pkYNext;
    };

    // input data and functions
    Function m_oF, m_oG;
    int m_iLevel, m_iMaxLevel;
    MgcReal m_fTolerance;
    MgcReal m_fXRoot, m_fYRoot;

    // fixed storage to avoid stack depletion during recursion
    MgcReal m_fX0, m_fXm, m_fX1, m_fY0, m_fYm, m_fY1;
    MgcReal m_fF00, m_fF10, m_fF01, m_fF11, m_fF0m, m_fF1m, m_fFm0, m_fFm1;
    MgcReal m_fFmm, m_fG00, m_fG10, m_fG01, m_fG11, m_fG0m, m_fG1m, m_fGm0;
    MgcReal m_fGm1, m_fGmm;
    int m_iNetSign;
    BisectNode* m_pkTemp;

    // the graph and recursion routine for building it
    BisectNode* m_pkGraph;
    bool BisectRecurse (BisectNode* pkN00);
};

#endif