How to remove a single layer from cullingmask

Hi,

i have a culling mask with multiple Layers selected. for example: 0, 8, 9, 10

In game i create a second Camera that copies that culling mask, so i don´t / can´t predefine it in the inspector. The problem i can not solve is, how do i remove that single layer from my copied cullingmask. so the camera sees 0, 8, and 10.
I do not understand that bit shifting so i ask here, if someone can help me to remove that layer 9 from my copied culling mask.

Thanks in Advance.

 

If you want to make layer 9 visible:

Code (csharp):

1. var newMask = oldMask | (1 << 9);

If you want to make layer 9 invisible:

Code (csharp):

1. var newMask = oldMask & ~(1 << 9);

 

Thank you, that did the job.

 

This helped me too. Thanks!

 

This worked for me too. Thanks makeshiftwings !

 

Thanks !

 

Thanks
Wrote extension methods

Code (CSharp):

1.     public static int AddLayerToLayerMask(this int layerMask, int layer)
2.     {
3.         return layerMask | 1 << layer;
4.     }
5.    
6.     public static int RemoveLayerFromLayerMask(this int layerMask, int layer)
7.     {
8.         return layerMask & ~(1 << layer);
9.     }
10.  
11.     public static void AddLayerToCullingMask(this Camera camera, int layer)
12.     {
13.         camera.cullingMask |= 1 << layer;
14.     }
15.    
16.     public static void RemoveLayerFromCullingMask(this Camera camera, int layer)
17.     {
18.         camera.cullingMask &= ~(1 << layer);
19.     }