Thank you both of you.
Having a quick peek into the OPie code I would say it's basically the same way as with Zork's implementation (cooldown is build out of 9 triangular textures).
I know this way, but I would like to realize it with pre-build textures.
I'm rotating the cooldowns parent object via animation groups, which is working fine with a single texture object that is anchored to the center of it's parent.
Building a cooldown out of several anchored/rotated/croped textures would most likely not work with this, or would at least raise new problems.
Supposably it would cost me more time to fix them, than to completely create the needed texture by hand.
Example:
This is what happens with the flyout background texture (which is not anchored to the center) if the button is rotated. So I would like to do it as simple as possible.
