wmlpolynomialcurve3.h

3D Game Engine Design Source Code非常棒

// Magic Software, Inc.
// http://www.magic-software.com
// http://www.wild-magic.com
// Copyright (c) 2003.  All Rights Reserved
//
// The Wild Magic Library (WML) source code is supplied under the terms of
// the license agreement http://www.magic-software.com/License/WildMagic.pdf
// and may not be copied or disclosed except in accordance with the terms of
// that agreement.

#ifndef WMLPOLYNOMIALCURVE3_H
#define WMLPOLYNOMIALCURVE3_H

#include "WmlPolynomial1.h"
#include "WmlSingleCurve3.h"

namespace Wml
{

template <class Real>
class WML_ITEM PolynomialCurve3 : public SingleCurve3<Real>
{
public:
    // Construction and destruction.  PolynomialCurve3 accepts responsibility
    // for deleting the input polynomials.
    PolynomialCurve3 (Polynomial1<Real>* pkXPoly, Polynomial1<Real>* pkYPoly,
        Polynomial1<Real>* pkZPoly);

    virtual ~PolynomialCurve3 ();

    int GetDegree () const;
    const Polynomial1<Real>* GetXPolynomial () const;
    const Polynomial1<Real>* GetYPolynomial () const;
    const Polynomial1<Real>* GetZPolynomial () const;

    virtual Vector3<Real> GetPosition (Real fTime) const;
    virtual Vector3<Real> GetFirstDerivative (Real fTime) const;
    virtual Vector3<Real> GetSecondDerivative (Real fTime) const;
    virtual Vector3<Real> GetThirdDerivative (Real fTime) const;

    virtual Real GetVariation (Real fT0, Real fT1,
        const Vector3<Real>* pkP0 = NULL,
        const Vector3<Real>* pkP1 = NULL) const;

protected:
    Polynomial1<Real>* m_pkXPoly;
    Polynomial1<Real>* m_pkYPoly;
    Polynomial1<Real>* m_pkZPoly;
    Polynomial1<Real> m_kXDer1, m_kYDer1, m_kZDer1;
    Polynomial1<Real> m_kXDer2, m_kYDer2, m_kZDer2;
    Polynomial1<Real> m_kXDer3, m_kYDer3, m_kZDer3;
};

typedef PolynomialCurve3<float> PolynomialCurve3f;
typedef PolynomialCurve3<double> PolynomialCurve3d;

}

#endif