2026-04-20 카트 잡기

Assets/02_Scripts/Player/RideController.cs

@@ -0,0 +1,123 @@
+using System.Collections.Generic;
+using Unity.XR.CoreUtils;
+using UnityEngine;
+using UnityEngine.Animations;
+using UnityEngine.XR.Interaction.Toolkit;
+using UnityEngine.XR.Interaction.Toolkit.Interactables;
+
+public class RideController : MonoBehaviour
+{
+    [SerializeField] private Transform _itemRoot;
+    [SerializeField, Min(0f)] private float _settleVelocity = 0.1f;
+    [SerializeField, Min(0f)] private float _settleDuration = 0.3f;
+
+    private ParentConstraint _parentConstraint;
+    private readonly Dictionary<Rigidbody, float> _settleTimer = new();
+
+    private void Awake()
+    {
+        _parentConstraint = GetComponent<ParentConstraint>();
+
+        if (_parentConstraint.sourceCount == 0 ||
+            _parentConstraint.GetSource(0).sourceTransform == null)
+        {
+            var xrOrigin = FindFirstObjectByType<XROrigin>();
+            if (xrOrigin == null)
+            {
+                Debug.LogWarning("RideController: 씬에서 XROrigin을 찾지 못했습니다.");
+                return;
+            }
+
+            var source = new ConstraintSource
+            {
+                sourceTransform = xrOrigin.transform,
+                weight = 1f
+            };
+
+            if (_parentConstraint.sourceCount == 0)
+                _parentConstraint.AddSource(source);
+            else
+                _parentConstraint.SetSource(0, source);
+
+        }
+    }
+
+    public void ActiveRide()
+    {
+        _parentConstraint.constraintActive = true;
+    }
+
+    public void DeactiveRide()
+    {
+        _parentConstraint.constraintActive = false;
+    }
+
+    public void OnDetectionStay(Collider other)
+    {
+        var rb = other.attachedRigidbody;
+        if (rb == null || rb.isKinematic) return;
+        if (!rb.TryGetComponent(out XRGrabInteractable grab)) return;
+
+        if (grab.isSelected)
+        {
+            _settleTimer.Remove(rb);
+            return;
+        }
+
+        if (rb.linearVelocity.magnitude > _settleVelocity)
+        {
+            _settleTimer[rb] = 0f;
+            return;
+        }
+
+        float elapsed = _settleTimer.GetValueOrDefault(rb, 0f) + Time.deltaTime;
+        if (elapsed >= _settleDuration)
+        {
+            AttachToCart(grab, rb);
+            _settleTimer.Remove(rb);
+        }
+        else
+        {
+            _settleTimer[rb] = elapsed;
+        }
+    }
+
+    public void OnDetectionExit(Collider other)
+    {
+        var rb = other.attachedRigidbody;
+        if (rb != null) _settleTimer.Remove(rb);
+    }
+
+    private void AttachToCart(XRGrabInteractable grab, Rigidbody rb)
+    {
+        grab.transform.SetParent(_itemRoot);
+        rb.linearVelocity = Vector3.zero;
+        rb.angularVelocity = Vector3.zero;
+        rb.isKinematic = true;
+
+        // 잡았다 놓을 때 XRGrabInteractable이 parent를 ItemRoot로 되돌리는 것 방지
+        grab.retainTransformParent = false;
+
+        grab.selectEntered.AddListener(OnPickedUpFromCart);
+    }
+
+    private void OnPickedUpFromCart(SelectEnterEventArgs args)
+    {
+        if (args.interactableObject is not XRGrabInteractable grab) return;
+
+        grab.transform.SetParent(null);
+
+        grab.selectEntered.RemoveListener(OnPickedUpFromCart);
+        grab.selectExited.AddListener(OnReleasedAfterPickup);
+    }
+
+    private void OnReleasedAfterPickup(SelectExitEventArgs args)
+    {
+        if (args.interactableObject is not XRGrabInteractable grab) return;
+
+        // XRGrabInteractable이 original(kinematic=true)로 복원한 것을 덮어씀
+        if (grab.TryGetComponent(out Rigidbody rb)) rb.isKinematic = false;
+
+        grab.selectExited.RemoveListener(OnReleasedAfterPickup);
+    }
+}