#!/usr/bin/perl
#

  
  my($output_file, $term_options);

  $output_file = "dartmouth_example_a.ps";
#  $term_options = "postscript color enhanced 'Helvetica-Bold,18' ";
  $term_options = "postscript color enhanced 'Helvetica,18' ";

  $cmdfile = "gnuplot.in";
  
  open (CMDFILE, ">$cmdfile") || die("can't open $cmdfile for writing");
  printf CMDFILE "set output '$output_file' \n";
  printf CMDFILE "set term $term_options \n";


  #  revert to some oldish default colors 
  printf CMDFILE "set style line 1 lt rgb 'red' lw 3  \n"; 
  printf CMDFILE "set style line 2 lt rgb 'sea-green' lw 3  \n"; 
  printf CMDFILE "set style line 3 lt rgb 'blue' lw 3  \n"; 
  printf CMDFILE "set style line 4 lt rgb 'cyan' lw 3  \n"; 
  printf CMDFILE "set style line 5 lt rgb 'violet' lw 3  \n"; 


  printf CMDFILE "set grid \n";
  printf CMDFILE "set key top right \n";
  printf CMDFILE "set ylabel 'Gaia G absolute magnitude ' \n";
  printf CMDFILE "set xlabel 'Gaia color (BP - RP) ' \n";
  printf CMDFILE "set title 'Dartmouth isochrone for 1.0 Gyr, [Fe/H] = -1.5 '\n";
  
  $cmd = "plot [-0.5:3][12:-2] 'dartmouth_example.txt' using (\$7-\$8):6 ";
  $cmd = $cmd . "   with points ls 1 pt 1 ps 0.9  t '' ";

  printf CMDFILE "$cmd \n";
  printf CMDFILE "set output \n";
  printf CMDFILE "quit \n";
  close(CMDFILE) ;
  
  $retval = `gnuplot < $cmdfile`;
  printf "retval is ..%s..\n", $retval;
  
  if ($term_options =~ /postscript/) {
    $psfile = $output_file;
    $giffile = $psfile;
    $giffile =~ s/.ps/.png/;
    $cmd = "convert -rotate 90 $psfile $giffile";
    printf "cmd is ..$cmd.. \n";
    $ret = `$cmd`;
  }

exit 0;
