Param0FunctionInt.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. 
//
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// 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.                           
//
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// along with this program; if not, write to the Free Software            
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// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
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//===========================================================================
#ifndef _PARAM0FUNCTIONINT_H
#define _PARAM0FUNCTIONINT_H


#include "ParamFunctionInt.h"


namespace Go {




class Param0FunctionInt : public ParamFunctionInt {
public:
    explicit Param0FunctionInt(double C);

    explicit Param0FunctionInt(double C,
                               ParamFunctionInt *parent);

    virtual ~Param0FunctionInt();

    virtual void point(Point& res, const double *par) const;

    virtual void point(std::vector<Point>& pt, 
                       const double* tpar, 
                       int derivs,  
                       const bool* from_right = 0,
                       double resolution = 1.0e-12) const
    {
        DEBUG_ERROR_IF(derivs != 0,
                       "Asked for derivatives of a standalone point.");
        pt.resize(1);
        point(pt[0], tpar);
    }

    virtual Param0FunctionInt* getParam0FunctionInt();

    virtual int numParams() const;

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

    virtual bool hasInnerKnots(int pardir) const;

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

    virtual bool hasCriticalVals(int pardir) const;

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

    virtual bool hasCriticalValsOrKnots(int pardir) const;

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

    virtual bool canDivide(int pardir);

    virtual int getMeshSize(int dir);

    virtual double paramFromMesh(int dir, int idx);

    virtual std::vector<double>::iterator getMesh();

    virtual double startParam(int pardir) const;

    virtual double endParam(int pardir) const;

    virtual bool boundaryPoint(const double* par, double eps) const;

    virtual void subdivide(int pardir, double par, 
                           std::vector<boost::
                           shared_ptr<ParamFunctionInt> >& subdiv_objs,
                           std::vector<boost::
                           shared_ptr<ParamFunctionInt> >& bd_objs);

    virtual CompositeBox compositeBox() const;


    // The returned dir is of interest for the 2par-case only.
    // Accepts non-strict monotonicity, as long as sf is not totally flat.
    virtual bool monotone(Point& dir, double tol=1.0e-15) const; // = 0;

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

    int dimension();

    // Functions used from coincidence checking
 
    // 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(double& t, double tol) const;
    
    virtual double nextSegmentVal(double par, bool forward) const;

    double getValue() const
    { return C_; }

protected:

    double C_; // The 0-parameter "function".

    int dim_; // Space dimension. 1.

    ParamFunctionInt* parentcurve_; // @@sbr Or surface ...

};


} // namespace Go


#endif // _PARAM0FUNCTIONINT_H

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