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Source/Engine/Renderer/Lightmaps.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Types/Guid.h"
+#include "Engine/Core/Math/Rectangle.h"
+#include "Engine/Serialization/ISerializable.h"
+
+#if USE_EDITOR
+// Additional options used in editor for lightmaps baking
+extern bool IsRunningRadiancePass;
+extern bool IsBakingLightmaps;
+extern bool EnableLightmapsUsage;
+#endif
+
+/// <summary>
+/// Single lightmap info data
+/// </summary>
+struct SavedLightmapInfo
+{
+    /// <summary>
+    /// Lightmap 0 texture ID
+    /// </summary>
+    Guid Lightmap0;
+
+    /// <summary>
+    /// Lightmap 1 texture ID
+    /// </summary>
+    Guid Lightmap1;
+
+    /// <summary>
+    /// Lightmap 2 texture ID
+    /// </summary>
+    Guid Lightmap2;
+};
+
+/// <summary>
+/// Describes object reference to the lightmap
+/// </summary>
+struct LightmapEntry
+{
+    /// <summary>
+    /// Index of the lightmap
+    /// </summary>
+    int32 TextureIndex;
+
+    /// <summary>
+    /// Lightmap UVs area that entry occupies
+    /// </summary>
+    Rectangle UVsArea;
+
+    /// <summary>
+    /// Init
+    /// </summary>
+    LightmapEntry()
+        : TextureIndex(INVALID_INDEX)
+        , UVsArea(Rectangle::Empty)
+    {
+    }
+};
+
+/// <summary>
+/// Describes lightmap generation options
+/// </summary>
+API_STRUCT() struct LightmapSettings : ISerializable
+{
+DECLARE_SCRIPTING_TYPE_MINIMAL(LightmapSettings);
+
+    /// <summary>
+    /// Lightmap atlas sizes (in pixels).
+    /// </summary>
+    API_ENUM() enum class AtlasSizes
+    {
+        /// <summary>
+        /// 64x64
+        /// </summary>
+        _64 = 64,
+
+        /// <summary>
+        /// 128x128
+        /// </summary>
+        _128 = 128,
+
+        /// <summary>
+        /// 256x256
+        /// </summary>
+        _256 = 256,
+
+        /// <summary>
+        /// 512x512
+        /// </summary>
+        _512 = 512,
+
+        /// <summary>
+        /// 1024x1024
+        /// </summary>
+        _1024 = 1024,
+
+        /// <summary>
+        /// 2048x2048
+        /// </summary>
+        _2048 = 2048,
+
+        /// <summary>
+        /// 4096x4096
+        /// </summary>
+        _4096 = 4096,
+    };
+
+    /// <summary>
+    /// Controls how much all lights will contribute indirect lighting.
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(0), Limit(0, 100.0f, 0.1f)")
+    float IndirectLightingIntensity = 1.0f;
+
+    /// <summary>
+    /// Global scale for objects in lightmap to increase quality
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(10), Limit(0, 100.0f, 0.1f)")
+    float GlobalObjectsScale = 1.0f;
+
+    /// <summary>
+    /// Amount of pixels space between charts in lightmap atlas
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(20), Limit(0, 16, 0.1f)")
+    int32 ChartsPadding = 3;
+
+    /// <summary>
+    /// Single lightmap atlas size (width and height in pixels)
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(30)")
+    AtlasSizes AtlasSize = AtlasSizes::_1024;
+
+    /// <summary>
+    /// Amount of indirect light GI bounce passes
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(40), Limit(1, 16, 0.1f)")
+    int32 BounceCount = 1;
+
+    /// <summary>
+    /// Enable/disable compressing lightmap textures (3 textures per lightmap with RGBA data in HDR)
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(45)")
+    bool CompressLightmaps = true;
+
+    /// <summary>
+    /// Enable/disable rendering static light for geometry with missing or empty material slots
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(50)")
+    bool UseGeometryWithNoMaterials = true;
+
+    /// <summary>
+    /// GI quality (range  [0;100])
+    /// </summary>
+    API_FIELD(Attributes="EditorOrder(60), Limit(0, 100, 0.1f)")
+    int32 Quality = 10;
+
+public:
+
+    // [ISerializable]
+    void Serialize(SerializeStream& stream, const void* otherObj) override;
+    void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
+};