Rename PlayerPositionsToShader to LightUpdater

Renamed all references, scripts, and editor helpers from PlayerPositionsToShader to LightUpdater for improved clarity and consistency. Updated README and editor preview documentation to reflect the new naming. Added new shader Standard_Lightmap_2SP for enhanced lighting and shadow support.

EditorPreview/Editor/LightupdaterPreview.cs

@@ -1,15 +1,15 @@
-// Assets/Editor/PlayerPositionsToShaderPreview.cs
+// Assets/Editor/LightUpdaterPreview.cs
 #if UNITY_EDITOR
 using UnityEditor;
 using UnityEngine;
 using System.Collections.Generic;
 
 [InitializeOnLoad]
-public static class PlayerPositionsToShaderPreview
+public static class LightUpdaterPreview
 {
     const double kTickInterval = 0.1; // seconds
     static double _nextTick;
-    static readonly Dictionary<PlayerPositionsToShader, Cache> _cache = new Dictionary<PlayerPositionsToShader, Cache>();
+    static readonly Dictionary<LightUpdater, Cache> _cache = new Dictionary<LightUpdater, Cache>();
 
     struct Cache
     {
@@ -21,7 +21,7 @@ public static class PlayerPositionsToShaderPreview
         public int       size;
     }
 
-    static PlayerPositionsToShaderPreview()
+    static LightUpdaterPreview()
     {
         EditorApplication.update += Update;
         EditorApplication.hierarchyChanged += ForceTick;
@@ -53,18 +53,18 @@ public static class PlayerPositionsToShaderPreview
         SceneView.RepaintAll();
     }
 
-    static PlayerPositionsToShader[] FindAllInScene()
+    static LightUpdater[] FindAllInScene()
     {
 #if UNITY_2023_1_OR_NEWER
-        return Object.FindObjectsByType<PlayerPositionsToShader>(FindObjectsInactive.Exclude, FindObjectsSortMode.None);
+        return Object.FindObjectsByType<LightUpdater>(FindObjectsInactive.Exclude, FindObjectsSortMode.None);
 #elif UNITY_2020_1_OR_NEWER
-        return Object.FindObjectsOfType<PlayerPositionsToShader>(true);
+        return Object.FindObjectsOfType<LightUpdater>(true);
 #else
-        return Resources.FindObjectsOfTypeAll<PlayerPositionsToShader>();
+        return Resources.FindObjectsOfTypeAll<LightUpdater>();
 #endif
     }
 
-    static void EnsureArrays(PlayerPositionsToShader src, int required)
+    static void EnsureArrays(LightUpdater src, int required)
     {
         if (!_cache.TryGetValue(src, out var c) ||
             c.positions == null || c.colors == null || c.directions == null || c.types == null || c.shadowMapIndices == null ||
@@ -83,7 +83,7 @@ public static class PlayerPositionsToShaderPreview
         }
     }
 
-    static void PushFromBehaviour(PlayerPositionsToShader src)
+    static void PushFromBehaviour(LightUpdater src)
     {
         int max = Mathf.Max(1, src.maxLights);
         EnsureArrays(src, max);
@@ -171,8 +171,8 @@ public static class PlayerPositionsToShaderPreview
     }
 }
 
-[CustomEditor(typeof(PlayerPositionsToShader))]
-public class PlayerPositionsToShaderInspector : Editor
+[CustomEditor(typeof(LightUpdater))]
+public class LightUpdaterInspector : Editor
 {
     public override void OnInspectorGUI()
     {
@@ -186,7 +186,7 @@ public class PlayerPositionsToShaderInspector : Editor
 
         if (GUILayout.Button("Refresh Now"))
         {
-            PlayerPositionsToShaderPreview.ForceTick();
+            LightUpdaterPreview.ForceTick();
             EditorApplication.QueuePlayerLoopUpdate();
             SceneView.RepaintAll();
         }

EditorPreview/LightUpdater.Editor.cs

@@ -1,8 +1,8 @@
-// Assets/Lighting/Scripts/PlayerPositionsToShader.Editor.cs
+// Assets/Lighting/Scripts/LightUpdater.Editor.cs
 #if UNITY_EDITOR
 using UnityEngine;
 
-public partial class PlayerPositionsToShader
+public partial class LightUpdater
 {
     public void Editor_BuildPreview(
         out Vector4[] positions,