During a brief period in elementary school drawing these things was quite the cool thing to do. I’ve been messing around with the GD2 module a bit lately and I thought it’d be fun and easy to write a little script to generate one.

It was.

The drawing algorithm

@nodes.times do |i|
    adjustment = i * @node_size
    pen.move_to adjustment, 0
    pen.line_to 0, @size - adjustment
end

Example Usage:

#takes in the output image size and the number of nodes
c = Curve.new 180, 30
c.draw
c.export "test.gif"

Download it!

*Note: If your output size doesn’t divide evenly by the number of nodes then the image will actually reduce the size of the output image.