Question Change FacePrefab in ARFaceManager programmatically

Hi!

I just started learning AR and started with face masks. I managed to add a mask, but I don't understand how to change it in runtime.

I wrote this code to change the mask, but when I call the "ChangeFaceMask" method, I see that it has changed in ArFaceManager (arFaceManager.facePrefab), but the mask does not change visually.

What am I doing wrong?

Code (CSharp):

1. public class FaceMaskHelper : MonoBehaviour
2. {
3.     public GameObject[] faceMasks;
4.     ARFaceManager arFaceManager;
5.  
6.     void Start()
7.     {
8.         arFaceManager = gameObject.GetComponent<ARFaceManager>();
9.     }
10.  
11.     void Update()
12.     {
13.      
14.     }
15.  
16.     void ChangeFaceMask(String maskName)
17.     {
18.         for (int i = 0; i < faceMasks.Length; i++)
19.         {
20.             GameObject go = faceMasks[i];
21.  
22.             if (go.name == maskName)
23.             {
24.                 arFaceManager.facePrefab = go;
25.                 break;
26.             }
27.         }
28.     }
29. }

 

I solved the problem with dynamically changing the mask in runtime. It turns out that you need to change the material at ARFace, and not the prefab at ARFaceManager.

Code (CSharp):

1. [RequireComponent(typeof(ARFaceManager))]
2. public class FaceMaskHelper : MonoBehaviour
3. {
4.     public Material[] faceMasks;
5.  
6.     private ARFaceManager arFaceManager;
7.  
8.     void Start()
9.     {
10.         arFaceManager = gameObject.GetComponent<ARFaceManager>();
11.     }
12.  
13.     void Update()
14.     {
15.        
16.     }
17.  
18.     void ChangeFaceMask(String faceMaskName)
19.     {
20.         for (int i = 0; i < faceMasks.Length; i++)
21.         {
22.             Material faceMaskMaterial = faceMasks[i];
23.  
24.             if (faceMaskMaterial.name == faceMaskName)
25.             {
26.                 foreach (ARFace arFace in arFaceManager.trackables)
27.                 {
28.                     arFace.GetComponent<MeshRenderer>().material = faceMaskMaterial;
29.                 }
30.  
31.                 break;
32.             }
33.         }
34.     }
35. }