Contents

# frozen_string_literal: true
trails = [[0, 0]] * 60
Shoes.app width: 200, height: 200, resizable: false do
  nostroke
  fill rgb(0x3, 0x1, 0x3, 0.6)

  # animation at 100 frames per second
  animate(60) do
    trails.shift
    trails << mouse[1, 2]

    clear do
      # change the background based on where the pointer is
      background rgb(
        20 + (70 * (trails.last[0].to_f / width)).to_i,
        20 + (70 * (trails.last[1].to_f / height)).to_i,
        51
      )

      # draw circles progressively bigger
      trails.each_with_index do |(x, y), i|
        i += 1
        oval left: x, top: y, radius: (i * 0.5), center: true
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
shoes-4.0.0.pre12	samples/good_follow.rb