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Assets/Oculus/Interaction/Samples/Scripts/UseGrabPressure/PressureSquishable.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 Oculus.Interaction.HandGrab;
+using UnityEngine;
+using UnityEngine.Assertions;
+
+namespace Oculus.Interaction
+{
+
+    public class PressureSquishable : MonoBehaviour, IHandGrabUseDelegate
+    {
+        [SerializeField]
+        private GameObject _squishableObject;
+
+        [SerializeField] [Range(0.01f, 1)]
+        private float _maxSquish = 0.25f;
+        [SerializeField] [Range(0.01f, 1)]
+        private float _maxStretch = 0.15f;
+
+        protected bool _started;
+        private Vector3 _initialScale;
+        protected virtual void Start()
+        {
+            this.AssertField(_squishableObject, nameof(_squishableObject));
+
+            _initialScale = _squishableObject.transform.localScale;
+        }
+
+        public void BeginUse()
+        {
+        }
+
+        public void EndUse()
+        {
+            _squishableObject.transform.localScale = _initialScale;
+        }
+
+        public float ComputeUseStrength(float strength)
+        {
+            float squishAmount = Mathf.Lerp(1, 1 - _maxSquish, strength);
+            float stretchAmount = Mathf.Lerp(1, 1 + _maxStretch, strength);
+
+            // Perform a cheap axis squish and stretch effect
+            _squishableObject.transform.localScale = new Vector3(_initialScale.x * stretchAmount, _initialScale.y * squishAmount, _initialScale.z * stretchAmount);
+            return strength;
+        }
+
+    }
+
+}