HandDriverUPM/HandDriver/SDK/Interaction SDK/Scripts/Runtime/HandInteraction.cs

using UnityEngine;

namespace UDE_HAND_INTERACTION
{
    public class HandInteraction : MonoBehaviour
    {
        [SerializeField]
        [Tooltip("Transform used as a reference to measure the local data of the HandGrabPose")]
        public Transform _relativeTo;

        public Transform RelativeTo => _relativeTo;

        public HandPose _handPose = new();

        [HideInInspector]
        public HandPose HandPose => _handPose;

        public enum Handness
        {
            Left,
            Right
        }

        public Handness handness => (Handness)_handPose.Handedness;

        public HandPerfabResource _HPResource;
        private Vector3 TipPos;
        public Pose RelativePose
        {
            get
            {
                if (_relativeTo != null)
                {
                    return PoseManager.DeltaScaled(_relativeTo, transform);
                }
                else
                {
                    return transform.GetPose(Space.Self);
                }
            }
        }

        [HideInInspector]
        public bool UseInteract { get; private set; } 

        void Awake()
        {
            if(transform.Find("PivotPoint") == null)
            {
                var virtualHand = Instantiate(_HPResource.GetHand(HandPose.Handedness), transform);
                Pose pose = PoseManager.GlobalPoseScaled(RelativeTo, RelativePose);
                virtualHand.SetPose(HandPose, pose);
                TipPos = virtualHand.TipPos.position;
                DestroyImmediate(virtualHand.gameObject);
                var Pivot = new GameObject("PivotPoint");
                Pivot.transform.parent = transform;
                Pivot.transform.position = TipPos;
            }
        }

        public void SetUseInteract()
        {
            UseInteract = true;
        }
    }
}