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implode.rb.html
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<!DOCTYPE public PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta name="generator" content="ex2html.rb" />
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<title>RMagick example: implode.rb</title>
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<body>
<h1>implode.rb</h1>
<div class="bodybox">
<div class="bodyfloat">
<pre class="language-ruby">
# frozen_string_literal: true
require 'rmagick'
img = Magick::Image.read('images/Flower_Hat.jpg').first
legend = Magick::Draw.new
legend.stroke = 'transparent'
legend.fill = 'white'
legend.gravity = Magick::SouthGravity
frames = Magick::ImageList.new
implosion = 0.25
8.times do
frames << img.implode(implosion)
legend.annotate(frames, 0, 0, 10, 20, sprintf('% 4.2f', implosion))
frames.alpha(Magick::DeactivateAlphaChannel)
implosion -= 0.10
end
7.times do
implosion += 0.10
frames << img.implode(implosion)
legend.annotate(frames, 0, 0, 10, 20, sprintf('% 4.2f', implosion))
frames.alpha(Magick::DeactivateAlphaChannel)
end
frames.delay = 10
frames.iterations = 0
puts 'Producing animation...'
frames.write('implode.gif')
exit
</pre>
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