Non Intended Collier Penetration.

Questions & Answers
1

Hello,

I seem to be in a bit of a pickle, When for example my spaceship shoots at a wall or enemy, The Bullet sometimes dose not register a collision and goes straight through the target, The bullet is supposed to deal damage to its target based on velocity of the bullet, So you can see the problem i am having. I will show you both the Weapon script and Bullet script to see if you can see what i can not, Thanks in advance.

projectileScript goes on the Bullet

using UnityEngine;
using System.Collections;
 
 
public class projectileScript : MonoBehaviour 
{
    public Vector3 muzzleVelocity;
 
    public float TTL;
 
    public bool isBallistic;
    public float Drag; // in metres/s lost per second.
 
    // Use this for initialization
    void Start () 
    {
        if (TTL == 0)
            TTL = 5;
        print(TTL);
        Invoke("projectileTimeout", TTL);
    }
 
    // Update is called once per frame
    void Update () 
    {
        if (Drag != 0)
            muzzleVelocity += muzzleVelocity * (-Drag * Time.deltaTime);
 
        if (isBallistic)
            muzzleVelocity += Physics.gravity * Time.deltaTime;
 
        if (muzzleVelocity == Vector3.zero)
            return;
        else
            transform.position += muzzleVelocity * Time.deltaTime;
        transform.LookAt(transform.position + muzzleVelocity.normalized);
        //Debug.DrawLine(transform.position, transform.position + muzzleVelocity.normalized, Color.red);
    }
 
    void projectileTimeout()
    {
        DestroyObject(gameObject);
    }
	
	public void OnCollisionEnter(Collision col)
    {
       if (col.gameObject.tag == "Static")
         Debug.Log("i hit the wall");
		//DestroyObject(gameObject);
    }
 
}

weaponScript goes on the Weapon

using UnityEngine;
using System.Collections;
 
public class weaponScript : MonoBehaviour 
{
    // public
    public float projMuzzleVelocity; // in metres per second
    public GameObject projPrefab;
    public float RateOfFire;
    public float Inaccuracy;
	public AudioClip ShootSoundFX;
 
    // private
    private float fireTimer;
 
    // Use this for initialization
    void Start () 
    {
        fireTimer = Time.time + RateOfFire;
    }
 
    // Update is called once per frame
    void Update () 
    {
        Debug.DrawLine(transform.position, transform.position + transform.forward, Color.red);
        if (Time.time > fireTimer && Input.GetMouseButton(0))
        {
            GameObject projectile;
            Vector3 muzzlevelocity = transform.forward;
 
            if (Inaccuracy != 0)
            {
                Vector2 rand = Random.insideUnitCircle;
                muzzlevelocity += new Vector3(rand.x, rand.y, 0) * Inaccuracy;
            }
 
            muzzlevelocity = muzzlevelocity.normalized * projMuzzleVelocity;
 
            projectile = Instantiate(projPrefab, transform.position, transform.rotation) as GameObject;
            projectile.GetComponent<projectileScript>().muzzleVelocity = muzzlevelocity;
            fireTimer = Time.time + RateOfFire;
			audio.PlayOneShot(ShootSoundFX);
			
        }
        else
            return;
    }
}
2

When moving a transform directly such as

transform.position += Vector3.right;

The collider will not register collisision. Add a rigidbody to your projectile prefab, turn off it’s gravity and move with

rigidbody.MovePosition(transform.position + Vector3.forward * Time.deltaTime);

That will allow for collisions to occur and your “OnCollisionEnter” functions will trigger.