Having Player light torches Using Particle System and OnCollisionEnter?

Question

Hello,

I'm trying to get my player to light torches in a scene, but not quite sure how to do this.

I have a torch prefab, that has a particle system and each time the player's torch hits an unlit torch, I would like that torch to start.

My current code is below. I have each torch object tagged as torch, and my player tagged as Player.

Any advice or tips?

Thanks!

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
  /* Attach this script to all torches. It will be used to start the fire using OnCollision?/OnTrigger?
 * Start with the particle effect/light being off, get all the components
 * Turn the torches on when the player's torch collides with them
 * Must make sure each torch object has a collider
 **/
 public class StartFire : MonoBehaviour
 {
 
     public GameObject torch;
     public ParticleSystem fireParticleSystem;
     bool lightOn;
 
     void Start()
     {
         //Start with the light off
         lightOn = false;

         //get Particle System 
         fireParticleSystem = GetComponent<ParticleSystem>();

         //get Torch
         torch = GetComponent<GameObject>(); 
     }
 
     // if player's torch hits this torch (that is not lit)
     //Turn on the fire
     //Set the light being on to true
     private void OnCollisionEnter(Collision collision) 
     {
         if (this.gameObject.tag==("torch") && collision.gameObject.tag==("Player") && lightOn==false)
         {
             //start the particle system
             fireParticleSystem.Play();
             lightOn = true;
         }
     }
 }

Answer 1

I had also asked this question on StackOverflow (https://stackoverflow.com/questions/49733313/unity3d-having-player-light-torches-using-particlesystem-and-oncollisionenter) and this response (by someone with the handle Programmer) worked for me so wanted to share:

"1.Create your ParticleSystem and change the tag of its GameObject to "torch".

2.Attach BoxCollider to the SphereCollider to that GameObject with the ParticleSystem.

3.Mark the IsTrigger of the collider created from #2 to be true because it doen't make sense to collide with a touch. It seems like you just want to detect when the player is touching it.

4.The touch script should attached to the player instead of the touch. Use OnTriggerEnter to handle the detection and detect when player touches the touch-light then use GetComponent to get the ParticleSystem and play it. Stop the particle in OnTriggerExit.

If you actually want player to collide and be stopped by the touch then ignore #2 and also use OnCollisionEnter and OnCollisionExit instead of OnTriggerEnter and OnTriggerExit.

Attach to the Player:

 public class ParticlePlayer : MonoBehaviour
 {
     void OnTriggerEnter(Collider other)
     {
         //Make sure player is touching a touch
         if (other.CompareTag("torch"))
         {
             //Get ParticleSystem from the Gameobject the player collided with
             ParticleSystem ps = other.GetComponent<ParticleSystem>();
 
             //Play Particle
             ps.Play();
         }
     }
 
     void OnTriggerExit(Collider other)
     {
         //Make sure player is touching a touch
         if (other.CompareTag("torch"))
         {
             //Get ParticleSystem from the Gameobject the player collided with
             ParticleSystem ps = other.GetComponent<ParticleSystem>();
 
             //Stop Particle
             ps.Stop();
         }
     }
 }

"

So huge shout out to that person who answered. I hope this can help someone else as well!

Having Player light torches Using Particle System and OnCollisionEnter?

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