processing + propane sketch

0515_find_the_cursor.rb

#!/usr/bin/env jruby
# frozen_string_literal: false
require 'propane'

# find the cursor  
# propane graffiti by 8mana
# based on code by Casey Reas and Ben Fry

class FindCursor < Propane::App
  def settings
    size 240, 120
  end

  def setup
    sketch_title 'find the cursor'
    $x = width/2
    $offset = 10
  end

  def draw
    background 204
    if mouseX > $x
      $x += 0.5
      $offset = -10
    end
    if mouseX < $x
      $x -= 0.5
      $offset = 10
    end
    line $x, 0, $x, height
    line mouseX, mouseY, mouseX + $offset, mouseY - 10
    line mouseX, mouseY, mouseX + $offset, mouseY + 10
    line mouseX, mouseY, mouseX + $offset*3, mouseY
  end
end

FindCursor.new