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Assets/ThirdParty/DestroyIt/Demos (safe to delete)/Scripts/Behaviors/PoweredLight.cs

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+using UnityEngine;
+using System.Linq;
+using System.Collections.Generic;
+
+namespace DestroyIt
+{
+    /// <summary>
+    /// This script checks if an object that contains lights is getting power from its
+    /// parent, determined by whether the parent is tagged as "Powered".
+    /// </summary>
+    public class PoweredLight : MonoBehaviour
+    {
+        public PowerSource powerSource;         // The source of power for this light.
+        public MeshRenderer emissiveMesh;       // Any additional mesh for which to turn off the emissive property of its shader when this light is unpowered. (For example, the lampshade of a light bulb.)
+        public Material emissiveOffMaterial;
+
+        private List<Light> lights;
+        private Transform parent;
+        private bool isPowered;
+
+        void Start()
+        {
+            isPowered = false;
+            lights = gameObject.GetComponentsInChildren<Light>().ToList();
+            if (lights.Count == 0)
+            {
+                Debug.Log("PoweredLight: No Light components found on [" + gameObject.name + "]. Removing script.");
+                Destroy(this);
+            }
+            parent = this.gameObject.transform.parent;
+            if (parent == null)
+            {
+                Debug.Log("PoweredLight: No parent found for [" + gameObject.name + "]. Removing script.");
+                Destroy(this);
+            }
+        }
+
+        void Update()
+        {
+            // remove any light from the list that is null or missing.
+            lights.RemoveAll(x => x == null);
+
+            // find out if we have power from the parent.
+            if (parent.gameObject.HasTag(Tag.Powered))
+                isPowered = true;
+            else
+                isPowered = false;
+
+            if (isPowered)
+            {
+                for (int i = 0; i < lights.Count; i++)
+                    lights[i].enabled = true;
+            }
+            else
+            {
+                for (int i = 0; i < lights.Count; i++)
+                    lights[i].enabled = false;
+
+                // Turn off emissive material
+                emissiveMesh.material = emissiveOffMaterial;
+            }
+        }
+    }
+}