source: tags/release-1.1/src/Cubes/drawBlankEdges.cc @ 1391

// -----------------------------------------------------------------------
// drawBlankEdges.cc: Draw the edge of the BLANK region of the cube on
//                    a PGPLOT map.
// -----------------------------------------------------------------------
// Copyright (C) 2006, Matthew Whiting, ATNF
//
// 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; either version 2 of the License, or (at your
// option) any later version.
//
// Duchamp 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 Duchamp; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
//
// Correspondence concerning Duchamp may be directed to:
//    Internet email: Matthew.Whiting [at] atnf.csiro.au
//    Postal address: Dr. Matthew Whiting
//                    Australia Telescope National Facility, CSIRO
//                    PO Box 76
//                    Epping NSW 1710
//                    AUSTRALIA
// -----------------------------------------------------------------------
#include <cpgplot.h>
#include <duchamp.hh>
#include <param.hh>
#include <Utils/mycpgplot.hh>
#include <string>

void drawBlankEdges(float *dataArray, int xdim, int ydim, Param &par)
{
  /**    
   *   A subroutine that is designed to draw the edges of the blank
   *   region of the cube on a moment/detection map. Uses the same
   *   procedure as used in the reconstruction subroutines.
   *
   *   Note that it needs a PGPLOT device open. The colour used is the current
   *    PGPLOT colour.
   *
   *   \param dataArray The array of pixel values
   *   \param xdim      The size of the array in the x-direction.
   *   \param ydim      The size of the array in the y-direction.
   *   \param par       The Param set telling us what a BLANK pixel is.
   */ 

  if(par.getFlagBlankPix()){

    if(!cpgtest())
      duchampError("Draw Blank Edges","There is no PGPlot device open!\n");
    else{

      float xoff,x2,yoff,y2;
      cpgqwin(&xoff,&x2,&yoff,&y2);

      bool *blank = new bool[xdim*ydim];
      for(int i=0;i<xdim*ydim;i++) blank[i] = par.isBlank(dataArray[i]);

      for(int x=0; x<xdim; x++){// for each column...
        for(int y=1;y<ydim;y++){
          int current = y*xdim + x;
          int previous = (y-1)*xdim + x;
          if( (blank[current]&&!blank[previous]) || 
              (!blank[current]&&blank[previous])   ){
            cpgmove(x-0.5, y-0.5);
            cpgdraw(x+0.5, y-0.5);
          }
        }
      }
      
      for(int y=0; y<ydim; y++){// for each row...
        for(int x=1;x<xdim;x++){
          int current = y*xdim + x;
          int previous = y*xdim + x-1;
          if( (blank[current]&&!blank[previous]) || 
              (!blank[current]&&blank[previous])   ){
            cpgmove(x-0.5, y-0.5);
            cpgdraw(x-0.5, y+0.5);
          }
        }
      }

      delete [] blank;
      
    }

  
  }

}