fun update do end
# Controls whether `update' and `draw' are automatically called by `LiveGroup'
- var exists writable = true
+ var exists = true is writable
# Redefine this method to asks how to draw on a view
fun draw(view: View) is abstract
super LiveObject
# x coordinate of the center point
- var x: Int writable = 0
+ var x: Int = 0 is writable
# y coordinate of the center point
- var y: Int writable = 0
+ var y: Int = 0 is writable
# width of the sprite
- var width: Int writable = 100
+ var width: Int = 100 is writable
# height of the sprite
- var height: Int writable = 100
+ var height: Int = 100 is writable
fun left: Int do return x - width/2
fun right: Int do return x + width/2
fun bottom: Int do return y + height/2
# x velocity (applied by `update')
- var vx: Int writable = 0
+ var vx: Int = 0 is writable
# y velocity (applied by `update')
- var vy: Int writable = 0
+ var vy: Int = 0 is writable
redef fun update
do