ScriptReference/Physics.GetIgnoreLayerCollision

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ScriptReference/Physics.GetIgnoreLayerCollision

https://docs.unity3d.com/ScriptReference/Physics.GetIgnoreLayerCollision.html

[mvi]

If you would like to drive raycasts with the same layer mask as defined in the collision matrix you can calculate the layer mask by using GetIgnoreLayerCollision(), for example:

public static int GetLayerMask(int sourceLayer)  
{  
    int layerMask = 0;  
    for (int otherLayer = 0; otherLayer < 32; otherLayer++)   
    {  
        if (Physics.GetIgnoreLayerCollision(sourceLayer, otherLayer) == false)  
        {  
            layerMask |= 1 << otherLayer;  
        }  
    }  
  
    return layerMask;  
}  
  
int layerMask = GetLayerMask(gameObject.layer); // Usage example