ExampleBresenham.cpp

/*
This file is part of the BIAS library (Basic ImageAlgorithmS).

Copyright (C) 2003-2009    (see file CONTACT for details)
  Multimediale Systeme der Informationsverarbeitung
  Institut fuer Informatik
  Christian-Albrechts-Universitaet Kiel


BIAS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

BIAS 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with BIAS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

// must be first:
//#include <Base/Common/LeakChecking.h>


/**
   @example ExampleBresenham.cpp
   @relates Bresenham,BresenhamCircle,Scanline
   @brief Example for using bresenham drawing circle and line
   @ingroup g_examples
   @author MIP
*/

#include "Base/Image/ImageIO.hh"
#include "Base/ImageUtils/Bresenham.hh"
#include "Base/ImageUtils/BresenhamCircle.hh"
#include "Base/ImageUtils/BresenhamCircleEighth.hh"
#include "Base/ImageUtils/Scanline.hh"
#include "Base/Image/Image.hh"

using namespace BIAS;
using namespace std;

int main (int argc, char *argv[])
{
  Image<unsigned char> im(200, 200, 1);
  unsigned char **ida=im.GetImageDataArray();
  int next[]={0,0}, start[]={10,30}, end[]={120,90}, center[]={100, 150};
  int epsilon=4, radius=30;

  if (argc==5){
    start[0]=atoi(argv[1]);
    start[1]=atoi(argv[2]);
    end[0]=atoi(argv[3]);
    end[1]=atoi(argv[4]);
  } else if (argc!=1){
    cerr << endl << argv[0] << " [ startx starty endx endy ]" << endl << endl;
  }

  im.FillImageWithConstValue((unsigned char)0);

  // draw circle with BresenhamCircle
  BresenhamCircle bcirc(center, radius);

  while (bcirc.GetNext(next)){
    ida[next[1]][next[0]]=255;
  }

  // draw 1/8 circle with BresenhamCircleEighth
  center[0]-=5;
  center[1]-=5;
  BresenhamCircleEighth bce(center, radius);

  while (bce.GetNext(next)){
    ida[next[1]][next[0]]=255;
  }

  // draw line with Scanline
  Scanline sl(start, end, epsilon);

  while (sl.GetNext(next)){
    ida[next[1]][next[0]]=255;
  }

  // draw line with Bresenham
  Bresenham bres(start, end);

  while (bres.GetNext(next)){
    ida[next[1]][next[0]]=0;
  }

  ImageIO::Save("bresenham", im);

  return 0;
}