#!/usr/bin/ruby -w require 'RMagick' i = Magick::ImageList.new i.new_image(300, 220, Magick::HatchFill.new("seashell")) gc = Magick::Draw.new # Draw the arc gc.fill_opacity(0) gc.stroke('red').stroke_width(3) gc.arc(130,30, 200,100, 45,90) # Draw circles around the endpoints gc.stroke_width(1) gc.stroke('gray50') gc.circle(130,30, 133,33) gc.circle(200,100,203,103) # Annotate gc.fill_opacity(1) gc.fill('black') gc.stroke('transparent') gc.text(137,30, "'130,30'") gc.text(207,100, "'200,100'") gc.draw(i) i.write("arc.gif")