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Question by ZyXeM · Oct 14, 2019 at 05:15 PM · c#collisionphysicssimulatephysics.overlapsphere

I got a problem with using the OverlapseSphere() method inside a different PhysicsScene

I am firing a projectile, on hitting an object it should explode and dmg all the objects within a radius. For this I am using a separate PhysicsScene. The physics within this scene are simulated each update. So when the projectile collides with a player or the map it will trigger the code underneath. I have tested what the scene is of the object it hits and it is the serverScene. But I never get a result from the OverlapsSphere. (another thing.. Why does this use a buffer for which I need to instantiate an array with a fixed size instead of returning the collision[]) I hope someone can help me!

 private void OnCollisionEnter(Collision collision)
 {
     Collider[] hitColliders = new Collider[5];
     Debug.Log(collision.gameObject.scene.name);
     int test = WorldController.serverScene.GetPhysicsScene().OverlapSphere(transform.position, 1000, hitColliders, default, default);
     Debug.Log(test.ToString());
     int i = 0;

     while (i < hitColliders.Length)
     {
         if (hitColliders[i] == null)
         {
             break;
         }
         Debug.Log("Collide + " + hitColliders[i].gameObject.name);
         ReferenceScript script = hitColliders[i].GetComponent<ReferenceScript>();
         if (script != null)
         {
             script.controller.Damage(50);
         }
         i++;
     }
     networkObject.Destroy();

 }
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Answer by lgarczyn · Oct 14, 2019 at 06:41 PM

default here isn't the function default value, it's the default value of the type of layerMask. And a layerMask is just an int. And the default value of an int is 0. And a layerMask of value 0 means "ignore every layers".

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avatar image ZyXeM · Oct 14, 2019 at 06:54 PM 1
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![alt text][1]

Isn't layer$$anonymous$$ask 0 just the default mask that is assigned to every object on creation standard? [1]: /storage/temp/147429-2019-10-14-20-52-12.png

2019-10-14-20-52-12.png (5.5 kB)
avatar image lgarczyn ZyXeM · Oct 16, 2019 at 07:17 AM 0
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Nope, but great question!

> If the layer$$anonymous$$ask = 0, we will never find any collisions with the ray.

Layer 0 is different than layer$$anonymous$$ask 0. The layer$$anonymous$$ask to get the first layer would have the first bit set to 1, and would therefore be 1. The default parameter is just a layer$$anonymous$$ask with everything but the ignoreRaycasts layer.

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