mgcrk4adapt.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 MGCRK4ADAPT_H
#define MGCRK4ADAPT_H

#include "MgcODE.h"


class MgcRK4Adapt : public MgcODE
{
public:
    // for dx/dt = F(t,x)
    MgcRK4Adapt (int iDim, MgcReal fStep, Function* aoF);
    virtual void Update (MgcReal fTIn, MgcReal* afXIn, MgcReal& rfTOut,
        MgcReal* afXOut);

    // for dx/dt = A(x)
    MgcRK4Adapt (int iDim, MgcReal fStep, AutoFunction* aoA);
    virtual void Update (MgcReal* afXIn, MgcReal* afXOut);

    virtual void SetStepSize (MgcReal fStep);

    void SetSafety (MgcReal fSafety);
    MgcReal GetSafety () const;
    MgcReal& Epsilon ();
    MgcReal GetStepUsed () const;
    int GetPasses () const;

    ~MgcRK4Adapt ();

protected:
    int m_iPasses;
    MgcReal m_fStepUsed, m_fSafety, m_fEpsilon, m_fCoeff;
    MgcReal* m_afTemp1;
    MgcReal* m_afTemp2;
    MgcReal* m_afTemp3;
    MgcReal* m_afTemp4;
    MgcReal* m_afSave1;
    MgcReal* m_afXTemp;
    MgcReal* m_afXInter;
    MgcReal* m_afXHalf;
    MgcReal* m_afXFull;
};

//---------------------------------------------------------------------------
inline MgcReal MgcRK4Adapt::GetSafety () const
{
    return m_fSafety;
}
//---------------------------------------------------------------------------
inline MgcReal& MgcRK4Adapt::Epsilon ()
{
    return m_fEpsilon;
}
//---------------------------------------------------------------------------
inline MgcReal MgcRK4Adapt::GetStepUsed () const
{
    return m_fStepUsed;
}
//---------------------------------------------------------------------------
inline int MgcRK4Adapt::GetPasses () const
{
    return m_iPasses;
}
//---------------------------------------------------------------------------

#endif