Spawning explosion upon collision

Unity Engine
1

Hi!

In my little project I have a character who’s firing fireballs (just particles)… When the particle effect collides with a wall or anything else it dissapears. I want to spawn an explosion where the particles collide… but I have no success what so ever.
I have struggled with this a couple of days now and now I need your help.

Here’s my particle prefab setup:
1366026--68330--$inspector_particle.jpg

Here’s the ParticleCollision.cs:

using UnityEngine;
using System.Collections;

public class ParticleCollision : MonoBehaviour
{
	public Transform explosionPrefab;
	
	void OnCollisionEnter(Collision collision)
	{
		ContactPoint contact = collision.contacts[0];
		Quaternion rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
		Vector3 pos = contact.point;
		Transform effect = Instantiate(explosionPrefab, pos, rot) as Transform;
	}
}

What am I missing?

2

I guess there’s another way for when detecting when a particle collides with a ColliderBox for example… Maybe if I make the player shoot a small sphere-model (not rendered thou) and spawn a explosion when the sphere collides with a wall or whatever? If so… how do I make the sphere move as fast as the particle effect?

3

I’m a little confused by your terminology… when you call that prefab a “particle” you’re not referring to the Unity Particle system are you?(Unity - Manual: Particle systems)…

… and that prefab doesn’t have a collider attached to it, so how are you currently making the “particle” disappear on collision?

4

Like this:
1366070--68334--$particle_collision.jpg

5

When my player shoots the fireballs, the code looks like this:

using UnityEngine;
using System.Collections;

public class PlayerAction : MonoBehaviour
{
	public Transform particleEffect;
	public GameObject shotOrigin;	
	public GameObject shotSFX;

	
	void Update()
	{
		bool spell = Input.GetButtonDown("Spell");
		Spell(spell);
	}
	
	void Spell(bool spell)
	{
		if(spell)
		{
			StartCoroutine(PlayEffect());
		}
	}
	
	IEnumerator PlayEffect()
	{
		yield return new WaitForSeconds(0.2f);
		Transform effect = Instantiate(particleEffect, shotOrigin.transform.position, shotOrigin.transform.rotation) as Transform;
		shotSFX.audio.Play();
		yield return new WaitForSeconds(1f);
	}
}
6

I figured out how to spawn an explosion… but explosion doesn’t spawn where the particles (the fireball) hit the wall…

using UnityEngine;
using System.Collections;

public class FBallCollide : MonoBehaviour {

    public Transform explosionPrefab;

    void OnParticleCollision(GameObject other)
    {
		Rigidbody body = other.rigidbody;
		Debug.Log("COLLISION DETECTED!");
		if(body)
		{
			Debug.Log("EXPLOSION!!");
			Transform effect = Instantiate(explosionPrefab, other.transform.position, other.transform.rotation) as Transform;
		}
    }
}
7

you’d get that from the collisionEvents

http://docs.unity3d.com/Documentation/ScriptReference/ParticleSystem.CollisionEvent-intersection.html

8

Interested in this. Bump. Trying something similar, in a 2D geometry game.