IvfSplineSegment3d.h

//
// Copyright 1999-2006 by Structural Mechanics, Lund University.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "ivf@byggmek.lth.se".
//
//
// Written by Jonas Lindemann
//

#ifndef _CIvfSplineSegment3d_h_
#define _CIvfSplineSegment3d_h_

#include <ivfmath/IvfCurveSegment3d.h>

class IVFMATH_API CIvfSplineSegment3d : public CIvfCurveSegment3d  {
private:
        CIvfVec3d* m_p1;
        CIvfVec3d* m_p2;
        CIvfVec3d* m_p;
        CIvfVec3d* m_t;
        CIvfVec3d* m_t1;
        CIvfVec3d* m_t2;
        double m_bias[2];
        
        double h0(double t);
        double h1(double t);
        double h2(double t);
        double h3(double t);

        double dh3(double t);
        double dh2(double t);
        double dh1(double t);
        double dh0(double t);
public:
        CIvfSplineSegment3d();

        virtual ~CIvfSplineSegment3d();
        
        virtual CIvfVec3d* getPosition(double t);

        virtual CIvfVec3d* getEndPoint();

        virtual CIvfVec3d* getStartPoint();
        
        virtual CIvfVec3d* getEndDirection();

        virtual CIvfVec3d* getStartDirection();

        double getEndBias();

        double getStartBias();

        void setEndBias(double bias);

        void setStartBias(double bias);

        void setEndPoint(CIvfVec3d* point);
        
        void setStartPoint(CIvfVec3d* point);

        double getSpeed(double t);

        virtual CIvfVec3d* getTangent(double t);
};

#endif

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