Layermask doesn't seem to work

Questions & Answers
1

This is quite odd, I’ve used layer masks before with no problems, so not sure what is happening. I’m trying to use a simple layer mask.

int layerMask = 1 << 12;
layerMask = ~layerMask;
Ray ray camera.ScreenPointToRay(new Vector3(x, y, 0));
RaycastHit hit;

if (Physics.Raycast(ray, out hit, Mathf.Infinity, layerMask))
{
  Debug.Log("Hit: " + hit.transform.name + " Layer: " + hit.transform.layer);
}

So I want to hit all layers except layer 12, but no matter what I do, it always hits it. I even tried taking out layerMask = ~layerMask (which wouldn’t make any sense) and of course it still hits it. Both times it prints out Layer 12.

Any ideas?

2

When I’m using Layermasks, my preferred method is to do this:

var mask: LayerMask;

I then use that mask in my Raycast, rather than dealing with bitshifting and all of that.

I realize it’s not an explicit answer to your question, but it will solve your problem.

3

I have just tested the layer thing and this works fine for me:

int layerMask1 = ~(1<<12);
RaycastHit hit;
if (Physics.Raycast(transform.position, transform.forward, out hit, Mathf.Infinity,layerMask1))
    Debug.Log("Hit something " + hit.transform.name + " " + hit.transform.gameObject.layer);

Don’t know whats wrong in your case.