Unity 2018 Cookbook - Third Edition

Limiting the range of the laser with Raycast hit to limit the far clip plane

Our laser target should highlight the first object it hits – it shouldn't go through all of the objects ahead of it. The project's far clip plane defined the distance at which the projector stops. We can use a simple script to fire a Raycast, and use the distance to the first object it hits as a guide for setting this far clip plane:

using UnityEngine;      public class LaserAim : MonoBehaviour  {         private Projector projector;         private float margin = 0.5f;          void Start () {             projector = GetComponent<Projector> ();         }          void Update ()  {             RaycastHit hit;             Vector3 forward =                      transform.TransformDirection(Vector3.forward);  if (Physics.Raycast(transform.position, forward, out hit)) ...