Reveal

The Reveal alteration hides or shows the images as if appearing from behind something.


create routine as Start
  launch ballShow
  launch ballHide
end
create sprite from ball1.png as ballShow
  where center=25,25 x=150 y=50
  having alt=show
end
create sprite from ball1.png as ballHide
  where center=25,25 x=150 y=150
  having alt=hide
end
create reveal as show
  where direction="left"
    speed=20
    type="show"
end
create reveal as hide
  where direction="right"
    speed=20
    type="hide"
end

Parameters

completion={routine name}: the name of a routine to run with the operation is complete.
direction="{top|bottom|right|left}": from which direction to enter or leave.
speed={number}: the speed with which to move the sprite
type="{show|hide}": should the sprite enter or leave the view with this alteration.