eurucamp example

bouncing_ball.rb

 Bouncing Ball

class BouncingBall < Processing::App

  def setup
    size 650, 800

    smooth
    stroke_weight 5
    @radius = 80
    @xpos = @radius + 5
    @ypos = @radius + 5
    ellipse @xpos, @ypos, @radius*2, @radius*2

    @xpos_change = 10
    @ypos_change = 10
  end
··
  def draw
    background 245
    @xpos += @xpos_change
    @ypos += @ypos_change
    ellipse @xpos, @ypos, @radius*2, @radius*2

    if @xpos > width - @radius || @xpos < @radius
      @xpos_change *= -1
    end

    if @ypos > height - @radius || @ypos < @radius
      @ypos_change *= -1
    end
  end
  
  def mouse_pressed
    fill random(255), random(255), random(255)
  end
end

BouncingBall.new :