require 'rvg/rvg' Magick::RVG.dpi = 90 rvg = Magick::RVG.new(12.cm, 4.cm).viewbox(0, 0, 1200, 400) do |canvas| canvas.background_fill = 'white' canvas.desc = "Example polyline01 - increasingly larger bars" # Show outline of canvas using the 'rect' method canvas.rect(1195, 395, 1, 1).styles(:fill=>'none', :stroke=>'blue', :stroke_width=>2) canvas.polyline(50,375, 150,375,150,325,250,325,250,375, 350,375,350,250,450,250,450,375, 550,375,550,175,650,175,650,375, 750,375,750,100,850,100,850,375, 950,375,950,25,1050,25,1050,375, 1150,375).styles(:fill=>'none', :stroke=>'blue', :stroke_width=>10) end rvg.draw.write('polyline01.gif')