#!/usr/bin/ruby -w require 'RMagick' i = Magick::ImageList.new i.new_image(500, 400, Magick::HatchFill.new('seashell')) gc = Magick::Draw.new # Draw Bezier curve gc.stroke('red') gc.stroke_width(3) gc.fill_opacity(0) gc.bezier(100,200, 100,50, 400, 350, 400,200) # Draw circles around endpoints gc.fill_opacity(0) gc.stroke('gray50').stroke_width(1) gc.circle(100,200, 103, 203) gc.circle(400,200, 403, 203) # Draw filled circles around control points gc.line(100,200, 100,50) gc.line(400,200, 400,350) gc.fill_opacity(1) gc.fill('gray50') gc.circle(100,50, 103,53) gc.circle(400,350, 403,353) # Annotate gc.fill('black') gc.stroke('transparent') gc.text(109,200, "'100,200'") gc.text(109,53, "'100,50'") gc.text(409,350, "'400,350'") gc.text(409,200, "'400,200'") gc.draw(i) i.write('cbezier4.gif') exit(0)