How does Rigidbody.AddExplosionForce() work?

Unity Engine
1

I am using rigidbody.AddExplosionForce( type impulse) to add an explosion to my boxes. With a cube on the floor with no rotation and an explosion applied on one side, it is propelled in the direction of the explosion. However, I have found that if I turn a box on the Y axis and apply the explosion, it is thrown into the air rather than propelled along the rotated axis.

This it the code on my bomb

using UnityEngine;
using System.Collections;

public class bomb : MonoBehaviour {

	// Use this for initialization
	public float power = 5.0f;
	
	void Start () {
		float range = 2f;
		foreach(GameObject block in GameObject.FindGameObjectsWithTag("Player")){
			if(Vector3.SqrMagnitude (block.transform.position - transform.position) <= range*range){		
				block.transform.rigidbody.AddExplosionForce(power, transform.position, range, 0.0f, ForceMode.Impulse);				
		    }
    	}
	}
}

Attached is a demo project. Three boxes, each with a bomb nearby with the above script attached. First box has the bomb at the centre of a face which propels it correctly along the z axis. Second box has the bomb left-of-centre and the box is propelled in the z-axis, whereas it should be heading off to the right. Third box had the box and sphere selected as a group and rotated, so the bomb is in the centre of the face relative to the box’s orientations, but it flies upwards.

Any help greatly appreciated!

1372447–69240–$Test.zip (152 KB)

2

It would appear AddExplosionForce is bugged and cannot correctly deal with explosions originating very close to objects the force is being applied to.