AddExplosionForce Issue

Unity Engine
1

Hello, been having a probelm using AddExplosionForce for quite some time now.

The problem im having is that I have a missle that when collides with a capsule collider it Adds an Explosion Force at the location of the missle on impact but for some reason it only affect the Y velocity. I am aware that there is an upwardsModifier but I have it set to 0 so I know thats not the problem. I have also checked that the explosion is in fact being created where the missle was.
The player capsule doesnt have gravity applied to it and it is restricted to the x and y axis as its a 2.5d game.
The odd thing is that on a very rare occasion it seem to work correctly for a while but then stops again after a few missle hits.

Does anyone know what the likely cause would be?
I have been searching the net and this forum for a few days now while trying many differnt things to get it to work. I know its most likely a simple thing to fix but I just cant work it out.

private var radius : float = 1.5;
private var power : float = 5.0;

var explosionPos = thisMissle.position;
var colliders : Collider[] = Physics.OverlapSphere (explosionPos, radius);

//For Each Object it Hits and that has a Rigid Body apply Explosive Force.
for (var hit in colliders) {
	if (!hit)
	continue;

	if (hit.rigidbody){
		hit.rigidbody.AddExplosionForce(power, explosionPos, radius, 0);
	}
}
2

Hi, welcome to the forum!

Can you post the section of code you are using to restrict the player to X/Y movement?

3

Thanks.
It seems I have just worked out the problem; trust me to do something like that after I ask for help.
Such a simple thing I should have noticed it before.

Thanks for the reply anyways.
I was using a basic thisShip.position.z = 0; if you were curious. I tried thisShip.rigidbody.position.z = 0; also but it seems to do the same thing.

For anyone that is having a similar problem, my ship has a capsule collider with a rigid body attached but also has a spherical trigger which is used to detect things around it which I totally overlooked, the way the AddExplosionForce is coded above it checks to see if it hit a rigid body regardless if its a trigger or not and applies the force.

4

I am having the same issue as DragonFlame, but I do not understand his solution.

I am building a FPS and the user can shoot ‘fireballs’ at an enemy who is essentially a floating egg. The enemy is a Prefab containing a Rigidbody and a Sphere Collider. The Rigidbody does not use gravity and the collider is not a trigger.

The problem is that with a direct hit, the enemy only moves upwards in the y position and rotates. He does not move in the x or z.

5

So it’s not only a problem with my enemy prefab, I am just not using AddExplosionForce() properly? I am having the same issue with a cube object that does have gravity applied to it. When I apply AddExplosionForce(), it only ‘explodes’ upwards and not outwards at the same time.

6

did u ever solve this? i’m having the same issue. here goes to hoping i’ll get a reply

7

I don’t have any weird issue well didn’t had any I got this.
I hope it might have the solution in there :o
It just works as expected.

        Collider[] colliders = Physics.OverlapSphere(this.gameObject.transform.position, explosionRad);
        for (int i = 0; i < colliders.Length; i++)
        {
            if (colliders[i].gameObject != this.gameObject)//I should not hit myself!
            {
                if (colliders[i].rigidbody)//It needs to be a rigedbody!
                {
                    colliders[i].gameObject.rigidbody.AddExplosionForce(explosionForce, this.gameObject.transform.position, explosionRad, 3.0f);
                }
            }
        }
8

I had the same issue and was able to fix it using a forcemode! Check out my post here:
http://answers.unity.com/answers/1785939/view.html