/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2010 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLCore/src/Line32f.cpp                                **
** Module : ICLCore                                                **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** Commercial License                                              **
** ICL can be used commercially, please refer to our website       **
** www.iclcv.org for more details.                                 **
**                                                                 **
** GNU General Public License Usage                                **
** Alternatively, this file may be used under the terms of the     **
** GNU General Public License version 3.0 as published by the      **
** Free Software Foundation and appearing in the file LICENSE.GPL  **
** included in the packaging of this file.  Please review the      **
** following information to ensure the GNU General Public License  **
** version 3.0 requirements will be met:                           **
** http://www.gnu.org/copyleft/gpl.html.                           **
**                                                                 **
** 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.                                          **
**                                                                 **
*********************************************************************/

#include <ICLCore/Line32f.h>
#include <ICLCore/Line.h>
#include <math.h>
#include <algorithm>

using namespace std;

namespace icl{

  Line32f::Line32f(const Line &l):start(l.start),end(l.end){}

  Line32f::Line32f(Point32f start, float arc, float length):
    start(start){
    end.x = start.x + cos(arc)*length;
    end.y = start.y + sin(arc)*length;
  }
  
  float Line32f::length() const{
    return ::sqrt (pow( start.x-end.x,2 ) +  pow(start.y -end.y ,2) );
  }
  float Line32f::getAngle() const{
    if(start == end) return 0;
    return atan2(start.y-end.y,start.x-end.x);
  }
  Point32f Line32f::getCenter() const{
    return (start+end)*.5;
  }
  
  std::vector<Point> Line32f::sample( const Rect &limits) const{
    Point startInt = Point( (int)round(start.x), (int)round(start.y) );
    Point endInt = Point( (int)round(end.x), (int)round(end.y) );
    return Line(startInt,endInt).sample(limits);
  }
  void Line32f::sample(vector<int> &xs, vector<int> &ys, const Rect &limits ) const{
    Point startInt = Point( (int)round(start.x), (int)round(start.y) );
    Point endInt = Point( (int)round(end.x), (int)round(end.y) );
    return Line(startInt,endInt).sample(xs,ys,limits);
  }

  /// ostream operator (start-x,start-y)(end-x,end-y)
  std::ostream &operator<<(std::ostream &s, const Line32f &l){
    return s << l.start << l.end;
  }
  
  /// istream operator
  std::istream &operator>>(std::istream &s, Line32f &l){
    return s >> l.start >> l.end;
  }
}