Collision not being detected when exploding grenades

Scripting
1

I’m wanting to be able to set off grenades with explosions and for whatever reason it’s not getting set off.

This is the code that I have on the grenade:

    private void OnCollisionEnter(Collision collision){
        if (collision.gameObject.tag == "Enemy" || collision.gameObject.tag == "Shot") {
            Explode();
        }
    }

It blows up when it touches an enemy AND when I shoot it directly with a projectile.

But for whatever reason it completely ignores explosions.

Here’s a script for one of those said explosions:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Rocket_Impact : MonoBehaviour {

    public AudioSource soundImpact;
    public float lifeTime;
    public float lifeClock;

    public float force;
    public int damage;
    SphereCollider myCollider;

    // Use this for initialization
    void Awake()
    {
        transform.GetComponent<SphereCollider>().enabled = true;
    }

    void OnEnable()
    {
        lifeClock = lifeTime;
        transform.GetComponent<SphereCollider>().enabled = true;
    }

    // Update is called once per frame
    void Update()
    {
        if (lifeClock > 0)
        {
            lifeClock -= Time.deltaTime;
            if (lifeClock <= 0)
            {
                gameObject.SetActive(false);
            }
        }
    }

    private void FixedUpdate()
    {
        bool skipFrame = true;
        if (skipFrame == false) transform.GetComponent<SphereCollider>().enabled = false;
        if (skipFrame == true) skipFrame = false;
    }

    void OnTriggerEnter(Collider hit)
    {
        Vector3 vectorForce = force * (hit.transform.position - transform.position);
        hit.transform.gameObject.GetComponent<Rigidbody>().AddForce(vectorForce);
        if (hit.CompareTag("Player"))
        {
            //Debug.Log("You shot yer self!");
            hit.transform.gameObject.GetComponent<Status>().ChangeCurrentHealth(damage);
            hit.transform.gameObject.GetComponent<Rigidbody_Controller>().movementToggle = true;
        }

        if (hit.CompareTag("Enemy"))
        {
            //Debug.Log("SPLASH!");
            hit.transform.gameObject.GetComponent<Enemy_Stats>().ChangeHealth(damage);
            return;
        }
    }
}

And the REALLY nutty part is that it sends the grenade soaring from the addforce, but does not explode.

And, of course, I made sure that everything has the “Shot” tag.

Any ideas why it’s not blowing up?

2

Is it perhaps because it is already within the sphere of the collider when you instantiate it, or entirely within it so that the OnCollisionEnter doesn’t trigger?

3

That sounds very likely.

How could I prevent that?

Explode it from the explosion scripts?

4

Well, I added:

if (hit.gameObject.name.Contains("Grenade")) hit.gameObject.GetComponent<Grenade>().Explode();

to every explosion. (Super efficient code, I know. :() And it works for the most part, except for one of them that doesn’t seem to work for no reason at all.

This one:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Plasma_Shot_Impact : MonoBehaviour {

    public AudioSource soundImpact;
    public float lifeTime;
    public float lifeClock;

    public float force;
    public int damage;

    SphereCollider myCollider;

    // Use this for initialization
    void Awake() {
        transform.GetComponent<SphereCollider>().enabled = true;
    }

    void OnEnable () {
        lifeClock = lifeTime;
        transform.GetComponent<SphereCollider>().enabled = true;
    }

    // Update is called once per frame
    void Update () {
        if(lifeClock > 0){
            lifeClock -= Time.deltaTime;
            if (lifeClock <= 0) {
                gameObject.SetActive (false);
            }
        }
    }

    private void FixedUpdate()
    {
        bool skipFrame = true;
        if (skipFrame == false) transform.GetComponent<SphereCollider>().enabled = false;
        if (skipFrame == true) skipFrame = false;
    }

    void OnTriggerEnter(Collider hit)
    {
        if (hit.gameObject.name.Contains("Grenade")) hit.gameObject.GetComponent<Grenade>().Explode();
        Vector3 vectorForce = force * (hit.transform.position - transform.position);
        hit.transform.gameObject.GetComponent<Rigidbody>().AddForceAtPosition(vectorForce, transform.position);
        if (hit.CompareTag("Player"))
        {
            //Debug.Log("You shot yer self!");
            hit.transform.gameObject.GetComponent<Status>().ChangeCurrentHealth(damage);
            return;
        }

        if (hit.CompareTag("Enemy"))
        {
            //Debug.Log("SPLASH!");
            hit.transform.gameObject.GetComponent<Enemy_Stats>().ChangeHealth(damage);
            return;
        }
    }
}