AnimatorParameter attribute

[Luanrobs]

I’m currently working on a new attribute:
[AnimationParameter(animatorFieldName)]

It’s designed for string or int fields, and it creates a dropdown dynamically filled with the parameter names from an Animator component referenced in another field.

What it does
It lets you pick parameters like "IsRunning" or "AttackTrigger" from a list instead of typing them manually, storing either the parameter name or its hash (via Animator.StringToHash) depending on the field type.

Example usage

public Animator animator;

[AnimationParameter("animator")]
public string parameterName;

[AnimationParameter("animator")]
public int parameterHash;

If you rename or delete the parameter in the Animator, the inspector will automatically show an error.

Internally, I’m currently using EditorPrefs to store the parameter name and type.
This allows the system to keep track of parameters even when using hashes, so if a parameter is renamed or removed, the inspector can still detect the change and display a warning.

I’m not 100% sure this is the best approach yet, but it’s working surprisingly well so far, open to suggestions if anyone has a cleaner way to handle this!

[vanifatovvlad]

Hi. Looks great!

Small suggestions:

• Name the attribute AnimatorParameter since these are not Animation parameters but the Animator's parameters
• Add an optional parameter type filter: AnimatorControllerParameterType? ParameterType { get; }, it will be very convenient

public Animator animator;

[AnimatorParameter(nameof(animator), AnimatorControllerParameterType.Float)]
public string myParameterName;

If I understand correctly, EditorPrefs stores a mapping between the hash and the old name (when a parameter is deleted or renamed), and without this, the validator will only be able to show a meaningless hash. I don't think there's any other option, but it's preferable to store everything in one variable to avoid cluttering the storage.

EditorPrefs.SetString("TriInspectorAnimatorParametersCache", JsonUtility.ToJson(cache));

[Luanrobs]

Hey, thanks for the suggestions!

You're totally right, calling it AnimationParameter instead of AnimatorParameter was just an oversight on my part.
And the idea of adding a type filter is genius, I’ll definitely include that! 👌