forked from openkylin/imagemagick
84 lines
2.3 KiB
Perl
84 lines
2.3 KiB
Perl
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#!/usr/bin/perl
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# Written by jreed@itis.com, adapted by Cristy.
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use Image::Magick;
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use Turtle;
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sub flower
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{
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my $flower = shift;
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my ($width, $height) = $flower->Get('width', 'height');
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my ($x, $y) = $turtle->state();
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my ($geometry);
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$geometry = '+' . int($x-$width/2) . '+' . int($y-$height/2);
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$im->Composite(image=>$flower, compose=>'over', geometry=>$geometry);
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}
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sub lsys_init
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{
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my ($imagesize) = @_;
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%translate =
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(
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'S' => sub{ # Step forward
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$turtle->forward($changes->{"distance"},
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$changes->{"motionsub"});
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},
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'-' => sub{ $turtle->turn(-$changes->{"dtheta"}); }, # counter-clockwise
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'+' => sub{ $turtle->turn($changes->{"dtheta"}); }, # Turn clockwise
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'M' => sub{ $turtle->mirror(); }, # Mirror
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'[' => sub{ push(@statestack, [$turtle->state()]); }, # Begin branch
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']' => sub{ $turtle->setstate(@{pop(@statestack)}); }, # End branch
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'{' => sub{ @poly = (); $changes=\%polychanges; }, # Begin polygon
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'}' => sub{ # End polygon
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$im->Draw (primitive=>'Polygon', points=>join(' ',@poly),
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fill=>'light green');
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$changes = \%stemchanges;
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},
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'f' => sub{ flower($pink_flower); }, # Flower
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'g' => sub{ flower($red_flower); }, # Flower
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'h' => sub{ flower($yellow_flower); } # Flower
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);
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# Create the main image
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$im = new Image::Magick;
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$im->Set(size=>$imagesize . 'x' . $imagesize);
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$im->Read('xc:white');
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# Create the flower images
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$pink_flower = new Image::Magick;
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$pink_flower->Read('pink-flower.gif');
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$red_flower = new Image::Magick;
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$red_flower->Read('red-flower.gif');
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$yellow_flower = new Image::Magick;
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$yellow_flower->Read('yellow-flower.gif');
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# Turtle: the midpoint of the bottom edge of the image, pointing up.
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$turtle=new Turtle($imagesize/2, $imagesize, 0, 1);
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}
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sub lsys_execute
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{
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my ($string, $repetitions, $filename, %rule) = @_;
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my ($command);
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# Apply the %rule to $string, $repetitions times.
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for (1..$repetitions)
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{
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$string =~ s/./defined ($rule{$&}) ? $rule{$&} : $&/eg;
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}
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foreach $command (split(//, $string))
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{
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if ($translate{$command}) { &{$translate{$command}}(); }
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}
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$im->Write($filename);
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$im->Write('win:');
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}
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1;
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