#!/usr/bin/ruby -w require 'RMagick' i = Magick::ImageList.new i.new_image(250, 250, Magick::HatchFill.new('light cyan')) scale1 = Magick::Draw.new scale1.stroke('red') scale1.stroke_width(2) # Draw y axis scale1.line(0, 0, 0, 249) scale1.line(0, 249, 10, 239) # Draw x axis scale1.line(0, 0, 249, 0) scale1.line(249, 0, 239, 10) # Add labels scale1.fill('black') scale1.stroke('transparent') scale1.text(8, 15, "'0,0'") scale1.text(233, 16, "x") scale1.text(12, 237, "y") # Draw circle at default scale. scale1.stroke('black') scale1.stroke_width(1) scale1.fill('white') scale1.circle(124.5, 124.5, 124.5, 149.5) # Label the circle. scale1.stroke('transparent') scale1.fill('black') scale1.text(108, 128.5, "'1.0,1.0'") scale1.draw(i) # Make a new draw object for the scale operation scale2 = Magick::Draw.new # Change the scale, draw the circle # and the label at the same coordinates. scale2.scale(1.5, 1.25) scale2.stroke('black') scale2.fill('yellow') scale2.circle(124.5, 124.5, 124.5, 149.5) scale2.stroke('transparent') scale2.fill('black') scale2.text(108, 128.5, "'1.5,1.25'") scale2.draw(i) #i.display i.write("scale.gif") exit