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Assets/Standard Assets/Utility/ActivateTrigger.cs

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+using System;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace UnityStandardAssets.Utility
+{
+    public class ActivateTrigger : MonoBehaviour
+    {
+        // A multi-purpose script which causes an action to occur when
+        // a trigger collider is entered.
+        public enum Mode
+        {
+            Trigger = 0,    // Just broadcast the action on to the target
+            Replace = 1,    // replace target with source
+            Activate = 2,   // Activate the target GameObject
+            Enable = 3,     // Enable a component
+            Animate = 4,    // Start animation on target
+            Deactivate = 5  // Decativate target GameObject
+        }
+
+        public Mode action = Mode.Activate;         // The action to accomplish
+        public Object target;                       // The game object to affect. If none, the trigger work on this game object
+        public GameObject source;
+        public int triggerCount = 1;
+        public bool repeatTrigger = false;
+
+
+        private void DoActivateTrigger()
+        {
+            triggerCount--;
+
+            if (triggerCount == 0 || repeatTrigger)
+            {
+                Object currentTarget = target ?? gameObject;
+                Behaviour targetBehaviour = currentTarget as Behaviour;
+                GameObject targetGameObject = currentTarget as GameObject;
+                if (targetBehaviour != null)
+                {
+                    targetGameObject = targetBehaviour.gameObject;
+                }
+
+                switch (action)
+                {
+                    case Mode.Trigger:
+                        if (targetGameObject != null)
+                        {
+                            targetGameObject.BroadcastMessage("DoActivateTrigger");
+                        }
+                        break;
+                    case Mode.Replace:
+                        if (source != null)
+                        {
+                            if (targetGameObject != null)
+                            {
+                                Instantiate(source, targetGameObject.transform.position,
+                                            targetGameObject.transform.rotation);
+                                Destroy(targetGameObject);
+                            }
+                        }
+                        break;
+                    case Mode.Activate:
+                        if (targetGameObject != null)
+                        {
+                            targetGameObject.SetActive(true);
+                        }
+                        break;
+                    case Mode.Enable:
+                        if (targetBehaviour != null)
+                        {
+                            targetBehaviour.enabled = true;
+                        }
+                        break;
+                    case Mode.Animate:
+                        if (targetGameObject != null)
+                        {
+                            targetGameObject.GetComponent<Animation>().Play();
+                        }
+                        break;
+                    case Mode.Deactivate:
+                        if (targetGameObject != null)
+                        {
+                            targetGameObject.SetActive(false);
+                        }
+                        break;
+                }
+            }
+        }
+
+
+        private void OnTriggerEnter(Collider other)
+        {
+            DoActivateTrigger();
+        }
+    }
+}