From 2e983006939772040a25e97e1a0293f4ef1baf74 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 4 May 2026 08:47:21 +0200
Subject: [PATCH] Add minor changes

---
 Source/Engine/Core/Math/Double4x4.h   | 32 +++++++++++++++++++++++++++
 Source/Engine/Core/Math/Matrix.cpp    |  8 +++++++
 Source/Engine/Renderer/RenderList.cpp | 12 ++++++++++
 Source/Engine/Renderer/RenderList.h   |  4 ++++
 4 files changed, 56 insertions(+)

diff --git a/Source/Engine/Core/Math/Double4x4.h b/Source/Engine/Core/Math/Double4x4.h
index b8a20bf67..dbea17c41 100644
--- a/Source/Engine/Core/Math/Double4x4.h
+++ b/Source/Engine/Core/Math/Double4x4.h
@@ -66,6 +66,12 @@ public:
         double Values[4][4];
         double Raw[16];
     };
+public:
+    /// <summary>A matrix with all of its components set to zero.</summary>
+    static const Double4x4 Zero;
+
+    /// <summary>The identity matrix.</summary>
+    static const Double4x4 Identity;
 
 public:
     /// <summary>
@@ -73,6 +79,32 @@ public:
     /// </summary>
     Double4x4() = default;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Matrix"/> struct.
+    /// </summary>
+    Double4x4(double m11, double m12, double m13, double m14,
+        double m21, double m22, double m23, double m24,
+        double m31, double m32, double m33, double m34,
+        double m41, double m42, double m43, double m44)
+        : M11(m11)
+        , M12(m12)
+        , M13(m13)
+        , M14(m14)
+        , M21(m21)
+        , M22(m22)
+        , M23(m23)
+        , M24(m24)
+        , M31(m31)
+        , M32(m32)
+        , M33(m33)
+        , M34(m34)
+        , M41(m41)
+        , M42(m42)
+        , M43(m43)
+        , M44(m44)
+    {
+    }
+
     Double4x4(const Matrix& matrix);
 
 public:
diff --git a/Source/Engine/Core/Math/Matrix.cpp b/Source/Engine/Core/Math/Matrix.cpp
index 4a73323d3..f8ee50c42 100644
--- a/Source/Engine/Core/Math/Matrix.cpp
+++ b/Source/Engine/Core/Math/Matrix.cpp
@@ -10,6 +10,7 @@
 #include "../Types/String.h"
 
 static_assert(sizeof(Matrix) == 4 * 4 * 4, "Invalid Matrix type size.");
+static_assert(sizeof(Double4x4) == 8 * 4 * 4, "Invalid Double4x4 type size.");
 
 const Matrix Matrix::Zero(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
 const Matrix Matrix::Identity(
@@ -18,6 +19,13 @@ const Matrix Matrix::Identity(
     0.0f, 0.0f, 1.0f, 0.0f,
     0.0f, 0.0f, 0.0f, 1.0f);
 
+const Double4x4 Double4x4::Zero(0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
+const Double4x4 Double4x4::Identity(
+    1.0, 0.0, 0.0, 0.0,
+    0.0, 1.0, 0.0, 0.0,
+    0.0, 0.0, 1.0, 0.0,
+    0.0, 0.0, 0.0, 1.0);
+
 Matrix::Matrix(const Matrix3x3& matrix)
 {
     Platform::MemoryCopy(&M11, &matrix.M11, sizeof(Float3));
diff --git a/Source/Engine/Renderer/RenderList.cpp b/Source/Engine/Renderer/RenderList.cpp
index d0d33077e..6515d0ecc 100644
--- a/Source/Engine/Renderer/RenderList.cpp
+++ b/Source/Engine/Renderer/RenderList.cpp
@@ -97,6 +97,18 @@ bool RenderLightData::CanRenderShadow(const RenderView& view) const
     return result && ShadowsStrength > ZeroTolerance;
 }
 
+#if !BUILD_RELEASE
+
+#include "Engine/Level/Actors/Light.h"
+#include "Engine/Scripting/Scripting.h"
+
+Light* RenderLightData::GetActor() const
+{
+    return Scripting::TryFindObject<Light>(ID);
+}
+
+#endif
+
 void RenderDirectionalLightData::SetShaderData(ShaderLightData& data, bool useShadow) const
 {
     data.SpotAngles.X = -2.0f;
diff --git a/Source/Engine/Renderer/RenderList.h b/Source/Engine/Renderer/RenderList.h
index 8e64e072b..8041141b1 100644
--- a/Source/Engine/Renderer/RenderList.h
+++ b/Source/Engine/Renderer/RenderList.h
@@ -64,6 +64,10 @@ struct RenderLightData
     int32 ShadowsResolution;
 
     bool CanRenderShadow(const RenderView& view) const;
+#if !BUILD_RELEASE
+    // Development-only, gets the actor that produced this light (from ID).
+    Light* GetActor() const;
+#endif
 };
 
 struct RenderDirectionalLightData : RenderLightData