Line2DInt.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            
// Foundation, Inc.,                                                      
// 59 Temple Place - Suite 330,                                           
// Boston, MA  02111-1307, USA.                                           
//
// Contact information: E-mail: tor.dokken@sintef.no                      
// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
// 0314 Oslo, Norway.                                                     
//
// Other licenses are also available for this software, notably licenses
// for:
// - Building commercial software.                                        
// - Building software whose source code you wish to keep private.        
//===========================================================================
#ifndef _LINEINT_H
#define _LINEINT_H


#include "AlgObj2DInt.h"
#include "Point.h"


namespace Go {




class Line2DInt : public AlgObj2DInt {
public:
    Line2DInt(Point point, Point dir);

    Line2DInt(double a, double b, double c);

    virtual ~Line2DInt(){};

    double a();

    double b();

    double c();

private:

    Point point_; // 2D ref point.
    Point dir_; // 2D line dir.

    // Compute point_ & dir_ based on a, b & c (as given by factors_).
    void computePoints();

    // Compute a, b & c based on point_ & dir_.
    void computeConstants(Point point, Point dir,
                          double& a, double& b, double& c);

};


} // namespace Go


#endif // _LINEINT_H

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