LayerMask makes me going insane.

Ok, what I have:

Code (csharp):

1.  
2. public LayerMask mask;    // Select layer mask in inspector;
3. public GameObject obj;
4.  
5. //What I need is to assign mask to the obj layer in start
6.  
7. void Start()
8. {
9. obj.layer = mask;
10. }
11.  

But how? I've tried a bunch of different conversions but with no luck. Any thoughts?

 

A LayerMask allows you to select multiple layers and gives you the bit mask for it, this is useful for raycasting and filtering GameObjects and such. However, the GameObject's layer is a layer index, so you can't always convert between them.

Unfortunately, Unity doesn't come with a LayerMask style struct to make this easier, so you must use the EditorGUI.LayerField to draw the dropdown layer list. But you can bundle that into a property drawer to make it easily usable, for example:

LayerAttribute.cs

Code (csharp):

1. using UnityEngine;
2. #if UNITY_EDITOR
3. using UnityEditor;
4. #endif
5.  
6. public class LayerAttribute : PropertyAttribute
7. {
8. }
9.  
10. #if UNITY_EDITOR
11. [CustomPropertyDrawer(typeof(LayerAttribute))]
12. public class LayerDrawer : PropertyDrawer
13. {
14.     public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
15.     {
16.         property.intValue = EditorGUI.LayerField(position, label, property.intValue);
17.     }
18. }
19. #endif

To use this, simply mark your variable with [Layer], e.g.: [Layer]public iny MyCoolLayer;

 

Thanks, will try it asap.