Rectangle#intersects

gistfile1.coffee

    intersects: (other) ->
        ((other.x >= @x &&
          other.x <= @x + @width) ||
         (other.x + other.width >= @x &&
          other.x + other.width <= @x + @width)) &&
        ((other.y >= @y &&
          other.y <= @y + @height) ||
         (other.y + other.height >= @y &&
          other.y + other.height <= @y + @height))