* add _update_state
* nonlya
* visible already does this for us!
* do hud renderer and exp button
* temp
* this really needs some type of timer like QT
* this really needs some type of timer like QT
* todo
* use in model renderer
* Revert "use in model renderer"
This reverts commit d35f774155c9875209d06b8cd0b4849b1d8a60c4.
* no passing rect
* cl
* unused now