GD::Graph::Polar - Make polar graph using GD package

  use GD::Graph::Polar;
  my $obj=GD::Graph::Polar->new(size=>480, radius=>100);
  $obj->addPoint        (50=>25);
  $obj->addPoint_rad    (50=>3.1415);
  $obj->addGeoPoint     (75=>25);
  $obj->addGeoPoint_rad (75=>3.1415);
  $obj->addLine($r0=>$t0, $r1=>$t1);
  $obj->addLine_rad($r0=>$t0, $r1=>$t1);
  $obj->addGeoLine($r0=>$t0, $r1=>$t1);
  $obj->addGeoLine_rad($r0=>$t0, $r1=>$t1);
  $obj->addArc($r0=>$t0, $r1=>$t1);
  $obj->addArc_rad($r0=>$t0, $r1=>$t1);
  $obj->addGeoArc($r0=>$t0, $r1=>$t1);
  $obj->addGeoArc_rad($r0=>$t0, $r1=>$t1);
  $obj->addString($r=>$t, "Hello World!");
  $obj->addString_rad($r=>$t, "Hello World!");
  $obj->addGeoString($r=>$t, "Hello World!");
  $obj->addGeoString_rad($r=>$t, "Hello World!");
  $obj->font(gdSmallFont);  #sets the current font from GD exports
  $obj->color("blue");      #sets the current color from Graphics::ColorNames
  $obj->color([0,0,0]);     #sets the current color [red,green,blue]
  print $obj->draw;

This package is a wrapper arround GD to produce polar graphs with an easy interface. I use this package to display GPS satellites on a graph with data from the Net::GPSD3 package.

The new constructor.

  my $obj = GD::Graph::Polar->new(               #default values
                                  size=>480,     #width and height in pixels
                                  radius=>1,     #scale of the radius
                                  ticks=>10,     #number of major ticks
                                  border=>2,     #pixel border around graph
                                  rgbfile=>"/usr/X11R6/lib/X11/rgb.txt"
                                 );

Method to add a point to the graph.

  $obj->addPoint(50=>25);

Method to add a point to the graph.

  $obj->addPoint_rad(50=>3.1415);

Method to add a point to the graph.

  $obj->addGeoPoint(75=>25);

Method to add a point to the graph.

  $obj->addGeoPoint_rad(75=>3.1415);

Method to add a line to the graph.

  $obj->addLine(50=>25, 75=>35);

Method to add a line to the graph.

  $obj->addLine_rad(50=>3.14, 75=>3.45);

Method to add a line to the graph.

  $obj->addGeoLine(50=>25, 75=>35);

Method to add a line to the graph.

  $obj->addGeoLine_rad(50=>3.14, 75=>3.45);

Method to add an arc to the graph.

  $obj->addArc(50=>25, 75=>35);

Method to add an arc to the graph.

  $obj->addArc_rad(50=>3.14, 75=>3.45);

Method to add an arc to the graph.

  $obj->addGeoArc(50=>25, 75=>35);

Method to add an arc to the graph.

  $obj->addGeoArc_rad(50=>25, 75=>35);

Method to add a string to the graph.

Method to add a string to the graph.

Method to add a string to the graph.

Method to add a string to the graph.

Method to set or return the current drawing color

  my $colorobj=$obj->color("blue");     #if Graphics::ColorNames available
  my $colorobj=$obj->color([77,82,68]); #rgb=>[decimal,decimal,decimal]
  my $colorobj=$obj->color;

Method to set or return the current drawing font (only needed by the very few)

  use GD qw(gdGiantFont gdLargeFont gdMediumBoldFont gdSmallFont gdTinyFont);
  $obj->font(gdSmallFont); #the default
  $obj->font;

Method returns a PNG binary blob.

  my $png_binary=$obj->draw;

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Michael R. Davis qw/perl michaelrdavis com/

Copyright (c) 2011 Michael R. Davis (mrdvt92)

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

GD, Geo::Constants, Geo::Functions, Graphics::ColorNames