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Contents
require 'rvg/rvg'
rvg = Magick::RVG.new(400, 150) do |canvas|
canvas.background_fill = 'white'
canvas.desc = 'Example NewCoordSys - New user coordinate system'
canvas.g.styles(:fill=>'none', :stroke=>'black', :stroke_width=>3) do |grp|
# Draw the axes of the original coordinate system
grp.line(0, 1.5, 400, 1.5)
grp.line(1.5, 0, 1.5, 150)
end
canvas.g do |grp|
grp.text(30, 30, 'ABC (orig coord system)').styles(:font_size=>20, :font_family=>'Verdana', :font_weight=>'normal', :font_style=>'normal')
end
# Establish a new coordinate system, which is
# shifted (i.e., translated) from the initial coordinate
# system by 50 user units along each axis.
canvas.g.translate(50, 50) do |grp|
grp.g.styles(:fill=>'none', :stroke=>'red', :stroke_width=>3) do |grp2|
# Draw lines of length 50 user units along
# the axes of the new coordinate system
grp2.line(0, 0, 50, 0)
grp2.line(0, 0, 0, 50)
end
grp.text(30, 30, 'ABC (translated coord system)').styles(:font_size=>20, :font_family=>'Verdana', :font_weight=>'normal', :font_style=>'normal')
end
end
rvg.draw.write('NewCoordSys.gif')
Version data entries
13 entries across 13 versions & 3 rubygems