Line.h

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/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLCore/src/ICLCore/Line.h                             **
** Module : ICLCore                                                **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once

#include <ICLUtils/CompatMacros.h>
#include <ICLUtils/Point.h>
#include <ICLUtils/Rect.h>
#include <vector>

namespace icl{
  namespace core{

    class ICLCore_API Line{
      public:
      static const Line null;


      Line(utils::Point start=utils::Point::null,
           utils::Point end=utils::Point::null):
      start(start),end(end){}


      Line(utils::Point start, float angle, float length);


      Line operator+(const utils::Point &p) const { return Line(start+p,end+p); }


      Line operator-(const utils::Point &p) const { return Line(start-p,end-p); }


      float length() const;

      utils::Point findClosestPoint(const utils::Point &p) const;


      inline float getMinDist(const utils::Point &p) const{
        return findClosestPoint(p).distanceTo(p);
      }


      bool intersects(const core::Line &other, utils::Point32f *p=0,
                      float *dstr=0, float *dsts=0) const;



      std::vector<utils::Point> sample( const utils::Rect &limits=utils::Rect::null ) const;

      void swap() { utils::Point x=start; start=end; end=x; }

      utils::Point start;

      utils::Point end;
    };

    ICLCore_API std::ostream &operator<<(std::ostream &s, const Line &l);

    ICLCore_API std::istream &operator>>(std::istream &s, Line &l);

  } // namespace core
}