[Godot 3.1] How to set a blend 2 node's blend amount which inside a state of state machine in Animation Tree?

Question

Hello, everyone

Currently I am playing around with AnimationTree.

I have a state machine inside the AnimationTree, and in the state machine there is a state which is a AnimationNodeBlendTree.
Inside that AnimationNodeBlendTree, I have a blend 2 node which I want to set the blend amount through script.

So the setting is:
blend 2 node < state, which is a AnimationNodeBlendTree < state machine < AnimationTree

I have tried the following to set the blend amount but both failed:

$AnimationTree["parameters/state_machine_name/playback/state_name/blend2/blend_amount"] = 0.5

 $AnimationTree["parameters/state_machine_name/playback/state_name/blend_2/blend_amount"] = 0.5

 $AnimationTree["parameters/state_machine_name/state_name/blend2/blend_amount"] = 0.5

 $AnimationTree["parameters/state_machine_name/state_name/blend_2/blend_amount"] = 0.5

where state_machine_name is the state machine name and state_name is the state name.

So how can I set the blend amount?
Thanks!

Answer 1

Have you tried:

$AnimationTree.set("parameters/state_machine_name/state_name/blend_2/blend_amount",  0.5)

If you select the AnimationTree you'll be able to see all parameters in one place in a visual way actually:

In order to not mess up with naming, you can rename newly added nodes in the AnimationNodeBlendTree instead of having to deal with default naming and the parameters will be updated accordingly:

So in my case it just translated to:

$AnimationTree.set("parameters/0/walk/direction/current", p_walk_direction)`

Comments

I tried it but it takes no effect
Also, I have tried

print($AnimationTree.get("parameters/state_machine_name/state_name/blend_2/blend_amount"))

but it gives me null

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Oh well this could be an engine bug actually... you could try to test it out on a simpler configuration first (remove state machine) and see how it works for you.

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ok it works in simpler configuration!
thx

Answer 2

You can simply hover over the property to get exact property name