mandelbrot.png

mandelbrot.sass

=mandelbrot(!img_width, !img_height, !iterations=100, !center_x=-0.7, !center_y=0.0, !width=3)
  !height = !width * !img_height / !img_width
  !x_start = !center_x - !width / 2
  !y_start = !center_y - !height / 2
  !x_scale = !width / !img_width
  !y_scale = !height / !img_height
  @for !xpx from 0 to !img_width
    @for !ypx from 0 to !img_height
      !x = !x_start + !xpx * !x_scale
      !y = !y_start + !ypx * !y_scale
      !x0 = !x
      !y0 = !y
      !i = 0
      @while !x*!x + !y*!y < 2*2 and !i < !iterations
        !xtemp = !x*!x - !y*!y + !x0
        !y = 2*!x*!y + !y0
        !x = !xtemp
        !i = !i + 1
      end
 
      .x-#{!xpx}.y-#{!ypx}
        @if !i == !iterations
          background-color black
        @else
          background-color= hsl(360 * !i / !iterations, 100, 50)
 
.pixelated
  +mandelbrot(100, 100)