Coupling HDCamera and HDAdditionalCameraData for reset/remove

com.unity.render-pipelines.high-definition/HDRP/Camera/HDAdditionalCameraData.cs

 using UnityEngine.Serialization;
+using UnityEngine.Assertions;
 
 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {
             None
         };
 
-        public ClearColorMode clearColorMode = ClearColorMode.Sky;
+        public ClearColorMode clearColorMode;
-        public Color backgroundColorHDR = new Color(0.025f, 0.07f, 0.19f, 0.0f);
-        public bool clearDepth = true;
+        public Color backgroundColorHDR;
+        public bool clearDepth;
-        public LayerMask volumeLayerMask = -1;
+        public LayerMask volumeLayerMask;
-        public float aperture = 8f;
-        public float shutterSpeed = 1f / 200f;
-        public float iso = 400f;
+        public float aperture;
+        public float shutterSpeed;
+        public float iso;
 
         // To be able to turn on/off FrameSettings properties at runtime for debugging purpose without affecting the original one
         // we create a runtime copy (m_ActiveFrameSettings that is used, and any parametrization is done on serialized frameSettings)
         // When we are a preview, there is no way inside Unity to make a disctinctoin between camera preview and material preview.
         // This property allow to say that we are an editor camera preview when the type is preview.
         public bool isEditorCameraPreview { get; set; }
+
+        private void Awake()
+        {
+            Init();
+        }
+
+        public void Reset()
+        {
+            Init();
+        }
+
+        private void Init()
+        {
+            clearColorMode = ClearColorMode.Sky;
+            backgroundColorHDR = new Color(0.025f, 0.07f, 0.19f, 0.0f);
+            clearDepth = true;
+            renderingPath = RenderingPath.Default;
+            volumeLayerMask = -1;
+            aperture = 8f;
+            shutterSpeed = 1f / 200f;
+            iso = 400f;
+        }
 
         // This is the function use outside to access FrameSettings. It return the current state of FrameSettings for the camera
         // taking into account the customization via the debug menu

com.unity.render-pipelines.high-definition/HDRP/Editor/Camera/HDCameraEditor.cs

     [CanEditMultipleObjects]
     partial class HDCameraEditor : Editor
     {
-        [MenuItem("CONTEXT/Camera/Remove HD Camera", false, 0)]
+        [MenuItem("CONTEXT/Camera/Remove Component", false, 0)]
+
+            Camera camera = go.GetComponent<Camera>();
+            HDAdditionalCameraData cameraAdditionalData = go.GetComponent<HDAdditionalCameraData>();
+
+            Assert.IsNotNull(camera);
+            Assert.IsNotNull(cameraAdditionalData);
-            Undo.DestroyObjectImmediate(go.GetComponent<Camera>());
-            Undo.DestroyObjectImmediate(go.GetComponent<HDAdditionalCameraData>());
+            Undo.DestroyObjectImmediate(camera);
+            Undo.DestroyObjectImmediate(cameraAdditionalData);
+        }
+
+        [MenuItem("CONTEXT/Camera/Reset", false, 0)]
+        static void ResetLight(MenuCommand menuCommand)
+        {
+            GameObject go = ((Camera)menuCommand.context).gameObject;
+
+            Assert.IsNotNull(go);
+
+            Camera camera = go.GetComponent<Camera>();
+            HDAdditionalCameraData cameraAdditionalData = go.GetComponent<HDAdditionalCameraData>();
+
+            Assert.IsNotNull(camera);
+            Assert.IsNotNull(cameraAdditionalData);
+
+            Undo.SetCurrentGroupName("Reset HD Camera");
+            Undo.RecordObjects(new UnityEngine.Object[] { camera, cameraAdditionalData }, "Reset HD Camera");
+            camera.Reset();
+            cameraAdditionalData.Reset();
         }
 
         SerializedHDCamera m_SerializedCamera;