changed update to OnReceivedFrame

Assets/Scenes/CameraGrain/CameraGrain.cs

 
 public class CameraGrain: MonoBehaviour
 {
+    [SerializeField]
+    public ARCameraManager cameraManager
+    {
+        get { return m_CameraManager; }
+        set { m_CameraManager = value; }
+    }
+
-        m_CameraManager = FindObjectOfType (typeof(ARCameraManager)) as ARCameraManager;
+        if(m_CameraManager == null)
+        {
+            m_CameraManager = FindObjectOfType (typeof(ARCameraManager)) as ARCameraManager;
+        }
+
+        m_CameraManager.frameReceived += OnReceivedFrame;
-    void Update()
+    void OnDisable()
-        if(m_Renderer != null && m_CameraManager.cameraGrainTexture != null)
+        m_CameraManager.frameReceived -= OnReceivedFrame;
+    }
+
+    void OnReceivedFrame(ARCameraFrameEventArgs eventArgs){
+        if(m_Renderer != null && eventArgs.cameraGrainTexture != null)
-            m_Renderer.material.SetTexture("_NoiseTex", m_CameraManager.cameraGrainTexture);
-            m_Renderer.material.SetFloat("_NoiseIntensity", m_CameraManager.noiseIntensity);
+            m_Renderer.material.SetTexture("_NoiseTex", eventArgs.cameraGrainTexture);
+            m_Renderer.material.SetFloat("_NoiseIntensity", eventArgs.noiseIntensity);
-
 }