biped-test-vrc/Assets/hwm/Scripts/HWMSetup.cs

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
using UnityEditor.Animations;
#endif

namespace RiggingTools.FacialAnimation
{
    [RequireComponent(typeof(SkinnedMeshRenderer))]
    public class HWMSetup : MonoBehaviour
    {
        [Header("Animation Settings")]
        public float moveDistance = 1f;
        public float duration = 2f;

    #if UNITY_EDITOR
        public void GenerateAnimationController()
        {
            var skinnedMesh = GetComponent<SkinnedMeshRenderer>();
            if (skinnedMesh == null)
            {
                Debug.LogWarning($"Skinned Mesh Renderer not found on {gameObject.name}");
                return;
            }

            string objName = gameObject.name;

            var clip = new AnimationClip();
            clip.name = objName + "_MoveUpDown";

            Keyframe[] keys = {
                new Keyframe(0, 0),
                new Keyframe(duration / 2f, moveDistance),
                new Keyframe(duration, 0)
            };

            var curve = new AnimationCurve(keys);
            clip.SetCurve("", typeof(Transform), "localPosition.y", curve);

            // Make loop
            var clipSettings = AnimationUtility.GetAnimationClipSettings(clip);
            clipSettings.loopTime = true;
            AnimationUtility.SetAnimationClipSettings(clip, clipSettings);

            AssetDatabase.CreateAsset(clip, $"Assets/{objName}_MoveUpDown.anim");

            var controller = AnimatorController.CreateAnimatorControllerAtPath($"Assets/{objName}_Controller.controller");
            var state = controller.layers[0].stateMachine.AddState("MoveUpDown");
            state.motion = clip;
            controller.layers[0].stateMachine.defaultState = state;

            AssetDatabase.SaveAssets();

            Debug.Log($"Generated animator setup for {objName}");
        }
    #endif
    }
}