How to Use several face modeling for emoji

Nuitrack SDK Unity3D
1

I want to know how to edit the FaceAnimManager.cs file to working like this.

  1. 4 people standing on camera.

  2. put emojis on their face.

  3. all emojis are different each other.

to make this work, I coppied (FaceAnimManger 1, 2, … 4) and edit 4 FaceAnimManger.cs file like this

void OnSkeletonUpdate(SkeletonData skeletonData)
{
string json = Nuitrack.GetInstancesJson();
faceInfo = JsonUtility.FromJson(json.Replace("""", “[]”));
if (faceInfo.Instances.Length == 0)
return;

    for (int i = 0; i < faceAnimControllers.Count; i++)
    {
        if (i < skeletonData.Skeletons.Length)
        {
            Skeleton skeleton = skeletonData.GetSkeletonByID(faceInfo.Instances[i].id);


            if(faceInfo.Instances[i].id == 1)
            {
                if (skeleton != null)
                {
                    nuitrack.Joint headJoint = skeleton.GetJoint(JointType.Head);

                    faceAnimControllers[i].gameObject.SetActive(headJoint.Confidence > 0.7f);
                    faceAnimControllers[i].UpdateFace(faceInfo.Instances[i], headJoint);
                }
            }
            
        }
        else
        {
            faceAnimControllers[i].gameObject.SetActive(false);
        }
    }
}

}

changed number each scripts files.

if(faceInfo.Instances[i].id == 1 , 2, 3, 4)**

everythings looks fine but odd thing occured when this situation

step.1 person A standing on camera
step.2 person B get in to camera
setp.3 person A get out of camera
step.4 person A get in again

then serveral coppied emojis showing up on screen.

I don’t know how to fix this problem.

sorry for my poor ENG writting skills.