# stroke_linejoin.rb

    #!/usr/local/bin/ruby18 -w
    require 'RMagick'

    imgl = Magick::ImageList.new
    imgl.new_image(400, 150) { self.background_color = 'white' }

    gc = Magick::Draw.new

    gc.stroke('black').stroke_width(15)
    gc.fill_opacity(0)
    gc.stroke_linecap('butt')

    # Draw lines with miter join
    gc.stroke_linejoin('miter')
    gc.polyline(25,100, 75,25, 125,100)

    # Draw lines with round join
    gc.stroke_linejoin('round')
    gc.polyline(150,100, 200,25, 250,100)

    # Draw lines with bevel join
    gc.stroke_linejoin('bevel')
    gc.polyline(275,100, 325,25, 375,100)

    # Show line endpoints in pink
    gc.fill('lightpink').fill_opacity(0)
    gc.stroke('lightpink').stroke_width(2)
    gc.stroke_linejoin('miter')
    gc.polyline(25,100, 75,25, 125,100)
    gc.polyline(150,100, 200,25, 250,100)
    gc.polyline(275,100, 325,25, 375,100)
    gc.fill_opacity(1)
    gc.circle(75,25, 76,26)
    gc.circle(200,25, 201,26)
    gc.circle(325,25, 326,26)

    # Annotate
    gc.fill('black')
    gc.stroke('transparent')
    gc.pointsize(14)
    gc.font_weight(Magick::BoldWeight)
    gc.text(35,120, "\"'miter' join\"")
    gc.text(160,120, "\"'round' join\"")
    gc.text(280,120, "\"'bevel' join\"")

    gc.draw(imgl)

    imgl.write("stroke_linejoin.gif")

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