ECM2

Assets/ECM2/Walkthrough/7 - Platforms/7.1 - Scripted Platforms/Scripts/KinematicMove.cs

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+using UnityEngine;
+
+namespace ECM2.Walkthrough.Ex71
+{
+    /// <summary>
+    /// This example shows how to implement a moving platform.
+    /// It will loop from its start position (ie: transform.position) to its target position
+    /// (ie: startPosition + offset) during moveTime seconds.
+    /// </summary>
+    
+    [RequireComponent(typeof(Rigidbody))]
+    public class KinematicMove : MonoBehaviour
+    {
+        #region FIELDS
+
+        [SerializeField]
+        public float _moveTime = 3.0f;
+
+        [SerializeField]
+        private Vector3 _offset;
+
+        #endregion
+
+        #region PRIVATE FIELDS
+
+        private Rigidbody _rigidbody;
+
+        private Vector3 _startPosition;
+        private Vector3 _targetPosition;
+
+        #endregion
+
+        #region PROPERTIES
+        
+        public float moveTime
+        {
+            get => _moveTime;
+            set => _moveTime = Mathf.Max(0.0001f, value);
+        }
+
+        public Vector3 offset
+        {
+            get => _offset;
+            set => _offset = value;
+        }
+
+        #endregion
+
+        #region METHODS
+
+        /// <summary>
+        /// Sinusoidal ease function.
+        /// </summary>
+
+        public static float EaseInOut(float time, float duration)
+        {
+            return -0.5f * (Mathf.Cos(Mathf.PI * time / duration) - 1.0f);
+        }
+
+        #endregion
+
+        #region MONOBEHAVIOUR
+
+        public void OnValidate()
+        {
+            moveTime = _moveTime;
+        }
+
+        public void Awake()
+        {
+            _rigidbody = GetComponent<Rigidbody>();
+            _rigidbody.isKinematic = true;
+
+            _startPosition = transform.position;
+            _targetPosition = _startPosition + offset;
+        }
+
+        public void FixedUpdate()
+        {
+            float t = EaseInOut(Mathf.PingPong(Time.time, _moveTime), _moveTime);
+            Vector3 p = Vector3.Lerp(_startPosition, _targetPosition, t);
+
+            _rigidbody.MovePosition(p);
+        }
+
+        #endregion
+    }
+}