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Contents
#! /usr/local/bin/ruby -w
require 'RMagick'
i = Magick::Image.new(300, 220, Magick::HatchFill.new("white","lightcyan2"))
gc = Magick::Draw.new
# Draw the border rectangle.
gc.fill_opacity(0)
gc.stroke_width(1)
gc.stroke('gray50')
gc.rectangle(40, 50, 250, 180)
# Draw the circles around the rectangle corners and
# arc endpoints. All the circles have a 3-pixel radius.
gc.circle(40, 50, 40+3, 50)
gc.circle(250, 180, 250+3, 180)
gc.circle(250, 114, 250+3, 114)
gc.circle(146, 50, 146+3, 50)
# Annotate
gc.font_weight(Magick::NormalWeight)
gc.font_style(Magick::NormalStyle)
gc.stroke('transparent')
gc.fill("black")
gc.fill_opacity(1)
# xMagick recognizes the braces as delimiters.
gc.gravity(Magick::NorthWestGravity)
gc.text(42, 37, "{40, 50}")
gc.text(188, 108, "{0 degrees}")
gc.gravity(Magick::SouthEastGravity)
gc.text(300-250, 220-195, "{250, 180}")
gc.gravity(Magick::NorthGravity)
gc.text(0, 67, "{270 degrees}")
# Draw the arc
gc.fill_opacity(0)
gc.stroke('red').stroke_width(3)
gc.arc(40, 50, 250,180, 0, 270)
# Draw on the canvas
gc.draw(i)
i.border!(1,1, "lightcyan2")
#i.display
i.write("arc.gif")
Version data entries
15 entries across 15 versions & 2 rubygems