A node to be used for advanced animation transitions in an [AnimationPlayer]. https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html https://github.com/godotengine/tps-demo Manually advance the animations by the specified time (in seconds). If [code]true[/code], the [AnimationTree] will be processing. The path to the [AnimationPlayer] used for animating. The process mode of this [AnimationTree]. See [enum AnimationProcessMode] for available modes. The root animation node of this [AnimationTree]. See [AnimationNode]. The animations will progress during the physics frame (i.e. [method Node._physics_process]). The animations will progress during the idle frame (i.e. [method Node._process]). The animations will only progress manually (see [method advance]).