Adding an animation to the AnimationPlayer via code

[stshryu]

Godot Version

4.2

Question

Is there a way to manipulate animations via code? In the below example, there’s a few things I’d like to accomplish:

1. Dynamically set the Sprite2D to be animated based on the current “active” node.
2. Add an animation that simply rotates the sprite 4 degrees and back to 0 degrees in 0.2 seconds.
3. Play that animation after creating it.

The node tree looks like this, where the active_node is going to be one of these Opt# that gets passed into it. Keep in mind each Bag sprite is different from node to node.

	var texture = active_option.get_node("Bag")
	var animation = Animation.new()
	var texture_track_index = animation.add_track(Animation.TYPE_VALUE)
	animation.track_set_path(texture_track_index, "texture")
	animation.track_insert_key(texture_track_index, 0.0, texture)
    var rota_track_index = animation.add_track(Animation.TYPE_VALUE)
	animation.track_set_path(rota_track_index, "rotation")
	animation.track_insert_key(rota_track_index, 0.0, 4)
	animation.track_insert_key(rota_track_index, 0.2, 0)
	
	var animation_player = AnimationPlayer.new()
	animation_player.add_animation("anim", animation)
	animation_player.play("anim")

The code above has been taken from various resources online for programmatically adding an animation to the animation player, however it seems that .add_animation() which was present in Godot 3, doesn’t appear in 4? Is there an equivalent function to add animations to the animation player in Godot 4?

[stshryu]

It appears, that setting the animation name and referencing it gets me one step closer to playing the animation

animation.resource_name = "anim"
animation_player.play("anim")

but the animation player still doesn’t recognize the animation, which I assume still requires some add_to_library or add_animation method to be called first.

[stshryu]

func test() -> void:
    var anim_lib = AnimationLibrary.new()
	for option in bag_options:
		var animation = Animation.new()
		animation.step = 0.1
		animation.length = 0.2

		var texture = option.find_children("Bag").back()
		var sprite_path: NodePath = scene_root.get_path_to(texture)
		
		var sprite_vis_path: NodePath = "%s:visible" % sprite_path
		var vis_track_index = animation.add_track(Animation.TYPE_VALUE)
		animation.track_set_path(vis_track_index, sprite_vis_path)
		animation.track_insert_key(vis_track_index, 0.0, true)
		
		var sprite_texture_path: NodePath = "%s:texture" % sprite_path
		var texture_track_index = animation.add_track(Animation.TYPE_VALUE)
		animation.track_set_path(texture_track_index, sprite_texture_path)
		animation.track_insert_key(texture_track_index, 0.0, texture)
		
		var sprite_rotation_path: NodePath = "%s:rotation" % sprite_path
		var rota_track_index = animation.add_track(Animation.TYPE_VALUE)
		animation.track_set_path(rota_track_index, sprite_rotation_path)
		animation.track_insert_key(rota_track_index, 0.0, 4)
		animation.track_insert_key(rota_track_index, 0.2, 0)
		
		anim_lib.add_animation(option.name, animation)
    animation_player.add_animation_library("bag_anim", anim_lib)

This is as far as I’ve gotten with a scripted version of creating animations, adding it to a library, then adding it to the animation player. For what its worth it appears to be working, the last thing left is to figure out why the textures are invisible. I have to assume its something to do with the animation missing some keys with the texture.

[yeah]

If I haven’t misunderstood your problem, a way going about solving it might be using tweens instead of animations.