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Assets/Oculus/Interaction/Runtime/Scripts/Movements/ObjectPullProvider.cs

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * Licensed under the Oculus SDK License Agreement (the "License");
+ * you may not use the Oculus SDK except in compliance with the License,
+ * which is provided at the time of installation or download, or which
+ * otherwise accompanies this software in either electronic or hard copy form.
+ *
+ * You may obtain a copy of the License at
+ *
+ * https://developer.oculus.com/licenses/oculussdk/
+ *
+ * Unless required by applicable law or agreed to in writing, the Oculus SDK
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using UnityEngine;
+
+namespace Oculus.Interaction.HandGrab
+{
+    public class ObjectPullProvider : MonoBehaviour, IMovementProvider
+    {
+        [SerializeField]
+        [Min(0f)]
+        private float _speed = 1f;
+        public float Speed
+        {
+            get
+            {
+                return _speed;
+            }
+            set
+            {
+                _speed = value;
+            }
+        }
+
+        [SerializeField]
+        [Min(0f)]
+        private float _deadZone = 0.02f;
+        public float DeadZone
+        {
+            get
+            {
+                return _deadZone;
+            }
+            set
+            {
+                _deadZone = value;
+            }
+        }
+
+        public IMovement CreateMovement()
+        {
+            return new ObjectPull(_speed, _deadZone);
+        }
+    }
+
+    public class ObjectPull : IMovement
+    {
+        private float _speed = 1f;
+        private float _deadZone = 0f;
+
+        public Pose Pose => _current;
+        public bool Stopped => _reachedGrabber;
+
+        private Pose _current = Pose.identity;
+        private Pose _grabberStartPose;
+        private Pose _grabbableStartPose;
+        private Pose _target;
+
+        private Plane _pullingPlane;
+
+        private Vector3 _translationDelta = Vector3.zero;
+
+        private float _lastTime;
+        private float _originalDistance;
+
+        private bool _reachedGrabber = false;
+
+        public ObjectPull(float speed, float deadZone)
+        {
+            _speed = speed;
+            _deadZone = deadZone;
+        }
+
+        public void MoveTo(Pose target)
+        {
+            _target = _grabberStartPose = target;
+            _current = _grabbableStartPose;
+            _lastTime = Time.time;
+            _reachedGrabber = false;
+            Vector3 grabDir = (_grabbableStartPose.position - _grabberStartPose.position);
+            _originalDistance = grabDir.magnitude;
+            _pullingPlane = new Plane(grabDir.normalized, _grabberStartPose.position);
+        }
+
+        public void UpdateTarget(Pose target)
+        {
+            _target = target;
+        }
+
+        public void StopAndSetPose(Pose source)
+        {
+            _grabbableStartPose = source;
+        }
+
+        public void Tick()
+        {
+            if (_reachedGrabber)
+            {
+                _current = _target;
+                return;
+            }
+
+            float timeDelta = (Time.time - _lastTime);
+            _lastTime = Time.time;
+            float posDelta = _pullingPlane.GetDistanceToPoint(_target.position);
+            if (Mathf.Abs(posDelta) < _deadZone)
+            {
+                return;
+            }
+
+            Vector3 direction = (_current.position - _target.position).normalized;
+            _translationDelta = direction * posDelta * _speed * timeDelta;
+            float remainingDistance = Vector3.Distance(_current.position, _target.position);
+            if (remainingDistance < _translationDelta.magnitude)
+            {
+                _reachedGrabber = true;
+                _current = _target;
+            }
+            else
+            {
+                _current.position += _translationDelta;
+                float currentDistance = Vector3.Distance(_current.position, _target.position);
+                float progress = 1f - Mathf.Clamp01(currentDistance / _originalDistance);
+                _current.rotation = Quaternion.Slerp(_grabbableStartPose.rotation, _target.rotation, progress);
+            }
+        }
+    }
+}