Unity 3D Tutorial Essentials 50 - Working with Layers in Unity

Unity Essentials Tutorial 50 - Working with Layers in Unity Working with Layers in Unity: Layers are the way of grouping game objects to control operations like rendering, light illumination, physics interactions, Ray casting etc. Viewing Tags & Layers Manager: Edit menu – Project Settings – Tags & Layers Note: There are 32 layers; first 8 are reserved for specific purpose they are built in layers and remaining are user layers. Adding new layer: Click on Layers - Click on the first empty user layer - Name the layer Note: Layers can be renamed Assigning layers: Select a game object - Click on the Layer drop down menu - Click on the required layer name Layer dropdown in the tool bar: Used control which layer objects must be displayed in the scene view or not Layers are used to control: Rendering: Which layer objects a camera must render and must not render Camera - Culling mask - Check/uncheck the layer(s) Light illumination: Which layer objects must be illuminated by this light and not illuminated Light - Culling mask - Check/uncheck the layer (s) Physics Interactions: Which layer objects must interact with which layer objects Edit- Project Settings - Physics - Uncheck respective checkbox Ray casting: Which layer objects must be hit by a Ray and not using UnityEngine; //Attach it to camera or player public class RayCaster : MonoBehaviour { int layerIndex =0; // Default layer is at 0 void Update () { int layermask = 1 << layerIndex; // except objects within the layer index, all other objects must hit by the ray layermask = ~layermask; RaycastHit hit; if (Physics.Raycast (transform.position, transform.TransformDirection (Vector3.forward), out hit, Mathf.Infinity, layermask)) { Debug.DrawRay (transform.position, transform.TransformDirection (Vector3.forward) * hit.distance, Color.green); } else { Debug.DrawRay (transform.position, transform.TransformDirection (Vector3.forward) * 1000, Color.red); } } } ========================================= Follow the link for next video: Unity Essentials Tutorial 51 - Working with Tags in Unity https://youtu.be/XhgoK5e3StE Follow the link for previous video: Unity Essentials Tutorial 49 - Tags & Layers Manager Introduction https://youtu.be/sZnPcGPxJCM =========================================