#!/usr/bin/perl   
#Prima.sierpinski.pl
#based on examples/f_fill and http://perlmonks.com/index.pl?node_id=337175
use strict;

use vars::i qw( $width 4 );
use vars::i qw( $height 4 );
use vars::i '@iterative_set' => 
(

    sub {
        my @pt = ( 400, 50 );
        return( ( $pt[0] + $_[0] ) / 2, ( $pt[1] + $_[1] ) / 2 );
    },
    sub {
        my @pt = ( 50, 400 );
        return( ( $pt[0] + $_[0] ) / 2, ( $pt[1] + $_[1] ) / 2 );
    },
    sub {
        my @pt = ( 750, 400 );
        return( ( $pt[0] + $_[0] ) / 2, ( $pt[1] + $_[1] ) / 2 );
    },

);



use Prima;
use Prima::Classes;

$::application = Prima::Application->  create;



my $w = Prima::Window-> create(
   onDestroy=> sub {$::application-> close;},
   size   => [ 444, 444],
   centered => 1,
   buffered => 1,
   palette => [ cl::Black, cl::White ],
   onPaint => sub {
     my ( $self, $canvas) = @_;
     $canvas-> color( cl::Back);
            # start coordinates
            my $x    = 40;
            my $y    = 400;
            my $iter = 0;

            # weed out transients
            while( $iter++ != 100 ) {

                ( $x, $y ) = $iterative_set[ int rand 3 ]->( $x, $y );

            }

            $iter = 0;
            while( $iter++ < 10000 ) {

                ( $x, $y ) = $iterative_set[ int rand 3 ]->( $x, $y );
                $canvas->rectangle ( $x, $y, $x+$width, $y+$height );

            }

  },
);

run Prima;

__END__