ProjectCurveAndCrossTan.h

//===========================================================================
// GoTools - SINTEF Geometry Tools version 1.1
//
// GoTools module: CORE
//
// Copyright (C) 2000-2007 SINTEF ICT, Applied Mathematics, Norway.
//
// This program is free software; you can redistribute it and/or          
// modify it under the terms of the GNU General Public License            
// as published by the Free Software Foundation version 2 of the License. 
//
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          
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//===========================================================================
#ifndef _GOPROJECTCURVEANDTAN_
#define _GOPROJECTCURVEANDTAN_

#include <boost/smart_ptr.hpp>

#include "Point.h"
#include "EvalCurveSet.h"
#include "SplineCurve.h"
#include "SplineSurface.h"



namespace Go
{


class ProjectCurveAndCrossTan : public EvalCurveSet
{
public:

    ProjectCurveAndCrossTan(const SplineCurve& space_crv, 
                            const SplineCurve& crosstan_crv,
                            const SplineSurface& surf,
                            const Point* start_par_pt, 
                            const Point* end_par_pt,
                            double epsgeo,
                            const RectDomain* domain_of_interest = NULL);

    virtual ~ProjectCurveAndCrossTan();

    virtual std::vector<Go::Point> eval(double t);

    virtual void eval(double t, int n, std::vector<std::vector<Go::Point> >& ders);

    virtual double start();

    virtual double end();

    // @@sbr Hmm, this seems strange, the curves not living in the same dimension ...
    //       Suppose this means the parameter curve is the most important one.
    virtual int dim();

    virtual bool approximationOK(double par, const std::vector<Go::Point>& approxpos,
                                 double tol1, double tol2);

    virtual int nmbCvs();

private:
    const SplineCurve& space_crv_;
    const SplineCurve& crosstan_crv_;
    const SplineSurface& surf_;
    const Point* start_par_pt_; // When projecting end pts may be of special interest.
    const Point* end_par_pt_;
    const double epsgeo_;
    const Go::RectDomain* domain_of_interest_;

    std::vector<double> createSeed(double tpar);

};

} // namespace Go


#endif //_GOPROJECTCURVEANDTAN_

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