Spline2FunctionInt.h

//===========================================================================
// GoTools - SINTEF Geometry Tools
//
// GoTools module: Intersections, version 1.0
//
// 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. 
//
// This program 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 General Public License for more details.                           
//
// You should have received a copy of the GNU General Public License      
// along with this program; if not, write to the Free Software            
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//
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// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
// 0314 Oslo, Norway.                                                     
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// Other licenses are also available for this software, notably licenses
// for:
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//===========================================================================
#ifndef _SPLINE2FUNCTIONINT_H
#define _SPLINE2FUNCTIONINT_H


#include "Param2FunctionInt.h"


namespace Go {




class Spline2FunctionInt : public Param2FunctionInt {
public:
    explicit Spline2FunctionInt(boost::shared_ptr<SplineSurface> surf);

    explicit Spline2FunctionInt(boost::shared_ptr<SplineSurface> surf, 
                                Param2FunctionInt *parent);

    virtual ~Spline2FunctionInt(){};

    virtual boost::shared_ptr<Param2FunctionInt>
    makeIntFunction(boost::shared_ptr<ParamSurface> surf);
    
    virtual bool hasInnerKnots(int pardir) const;

    virtual bool hasCriticalValsOrKnots(int pardir) const;

    virtual std::vector<double> getInnerKnotVals(int pardir,
                                                 bool sort=false) const;

    virtual std::vector<double> getCriticalValsAndKnots(int pardir) const;

//     void getLengthAndWiggle(double *length, double *wiggle);

    // pardir = 0 || 1
    // @@sbr A trimmed sf need not have a startparam/endparam ...
    virtual double startParam(int pardir) const;

    virtual double endParam(int pardir) const;

    // We want to know if there exists par direction in which the
    // function is monotone (guarantees at most one solution for a
    // continuous function).  We also would like to know in what
    // direction the function is monotone (will then move in
    // orthogonal direction).
    virtual bool monotone(Point& dir, double tol=1.0e-15) const;

    // Functions used for coincidence testing

    // Find the interval in which t lies, if t is within tol of an
    // existing knot, t will be changed to that knot.
    virtual int knotIntervalFuzzy(int pardir, double& t, double tol) const;

    virtual double nextSegmentVal(int pardir, double par, bool forward) const;

    virtual void 
    getBoundaryObjects(std::vector<boost::
                       shared_ptr<BoundaryFunctionInt> >& bd_objs);

    boost::shared_ptr<SplineSurface> surface3D();

    boost::shared_ptr<SplineSurface> createGradSurface() const;

protected:
    // Data members
    boost::shared_ptr<SplineSurface> spsf_; // shared_ptr to this
                                            // curve

};


} // namespace Go


#endif // _SPLINE2FUNCTIONINT_H

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