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line01.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">
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<meta name="generator" content="ex2html.rb" />
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<title>RMagick example: line01.rb</title>
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<body>
<h1>line01.rb</h1>
<div class="bodybox">
<div class="bodyfloat">
<pre class="language-ruby">
# frozen_string_literal: true
require 'rvg/rvg'
Magick::RVG.dpi = 90
rvg = Magick::RVG.new(12.cm, 4.cm).viewbox(0, 0, 1200, 400) do |canvas|
canvas.background_fill = 'white'
canvas.desc = 'Example line01 - lines expressed in user coordinates'
# Show outline of canvas using the 'rect' method
canvas.rect(1195, 395, 1, 1).styles(fill: 'none', stroke: 'blue', stroke_width: 2)
canvas.g.styles(stroke: 'green') do |grp|
grp.line(100, 300, 300, 100).styles(stroke_width: 5)
grp.line(300, 300, 500, 100).styles(stroke_width: 10)
grp.line(500, 300, 700, 100).styles(stroke_width: 15)
grp.line(700, 300, 900, 100).styles(stroke_width: 20)
grp.line(900, 300, 1100, 100).styles(stroke_width: 25)
end
end
rvg.draw.write('line01.gif')
</pre>
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