do
# FIXME this kind of method should use something like a canvas
# instead of being hard coded on the display.
var wx = x.to_f * width / display.width.to_f - position.x
var wy = y.to_f * height / display.height.to_f - position.y
do
# FIXME this kind of method should use something like a canvas
# instead of being hard coded on the display.
var wx = x.to_f * width / display.width.to_f - position.x
var wy = y.to_f * height / display.height.to_f - position.y