Combined HDAdditionalLightData LateUpdates (#93)

* Combined HDAdditionalLightdata LateUpdates

* Wrapped with XP_CRAZYHUNTER define

Author: AdamStrickUnity

com.unity.render-pipelines.high-definition/Runtime/Lighting/Light/HDAdditionalLightData.cs

@@ -2587,11 +2587,17 @@ private void Start()
         }
 
         // TODO: There are a lot of old != current checks and assignation in this function, maybe think about using another system ?
-        void LateUpdate()
+
+#if XP_CRAZYHUNTER
+        internal void DoLateUpdate()
+        {
+#else
+        internal void LateUpdate()
         {
             // Prevent any unwanted sync when not in HDRP (case 1217575)
             if (HDRenderPipeline.currentPipeline == null)
                 return;
+#endif
 
             // We force the animation in the editor and in play mode when there is an animator component attached to the light
 #if !UNITY_EDITOR
@@ -2941,6 +2947,8 @@ void UpdateLightIntensity()
 
         void Awake()
         {
+            HDRPUpdates.LazyInit();
+
             Migrate();
 
             // We need to reconstruct the emissive mesh at Light creation if needed due to not beeing able to change hierarchy in prefab asset.
@@ -3690,7 +3698,7 @@ public ShadowMapType GetShadowMapType(HDLightType lightType)
         /// <summary>Tell if the light is overlapping for the light overlap debug mode</summary>
         internal bool IsOverlapping()
         {
-            var baking = GetComponent<Light>().bakingOutput;
+            var baking = legacyLight.bakingOutput;
             bool isOcclusionSeparatelyBaked = baking.occlusionMaskChannel != -1;
             bool isDirectUsingBakedOcclusion = baking.mixedLightingMode == MixedLightingMode.Shadowmask || baking.mixedLightingMode == MixedLightingMode.Subtractive;
             return isDirectUsingBakedOcclusion && !isOcclusionSeparatelyBaked;

com.unity.render-pipelines.high-definition/Runtime/Lighting/Light/HDRPUpdates.cs

@@ -0,0 +1,35 @@
+#if XP_CRAZYHUNTER
+namespace UnityEngine.Rendering.HighDefinition
+{
+    [ExecuteAlways]
+    public class HDRPUpdates : MonoBehaviour
+    {
+        private static HDRPUpdates s_Instance;
+
+        internal static void LazyInit()
+        {
+            if (s_Instance == null)
+            {
+                GameObject go = new GameObject("HDRPUpdates");
+                DontDestroyOnLoad(go);
+                s_Instance = go.AddComponent<HDRPUpdates>();
+            }
+        }
+
+        private void LateUpdate()
+        {
+            // Prevent any unwanted sync when not in HDRP (case 1217575)
+            if (HDRenderPipeline.currentPipeline == null)
+                return;
+
+            var hdAdditionalLightDatas = HDAdditionalLightData.s_InstancesHDAdditionalLightData;
+            int dataCount = hdAdditionalLightDatas.Count;
+
+            for (int i = dataCount - 1; i >= 0; i--)
+            {
+                hdAdditionalLightDatas[i].DoLateUpdate();
+            }
+        }
+    }
+}
+#endif