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Source/Engine/Level/Scene/SceneLightmapsData.cpp

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "SceneLightmapsData.h"
+#include "Engine/Core/Log.h"
+#include "Engine/Level/Level.h"
+#include "Engine/Level/Scene/Scene.h"
+#include "Engine/Level/Scene/Lightmap.h"
+
+SceneLightmapsData::SceneLightmapsData(Scene* scene)
+    : _lightmaps(4)
+    , _scene(scene)
+{
+}
+
+SceneLightmapsData::~SceneLightmapsData()
+{
+    // Ensure that lightmaps has been released
+    ASSERT(_lightmaps.IsEmpty());
+}
+
+Lightmap* SceneLightmapsData::GetReadyLightmap(int32 index)
+{
+    return index >= 0 && index < _lightmaps.Count() && _lightmaps[index]->IsReady() ? _lightmaps[index] : nullptr;
+}
+
+#if USE_EDITOR
+
+void SceneLightmapsData::GetCacheFolder(String* result)
+{
+    *result = _scene->GetDataFolderPath() / TEXT("Lightmaps");
+}
+
+void SceneLightmapsData::GetCachedLightmapPath(String* result, int32 lightmapIndex, int32 textureIndex)
+{
+    String cacheFolder;
+    GetCacheFolder(&cacheFolder);
+    *result = cacheFolder / String::Format(TEXT("Lightmap{0:0>2}-{1}"), lightmapIndex, textureIndex) + ASSET_FILES_EXTENSION_WITH_DOT;
+}
+
+#endif
+
+void SceneLightmapsData::ClearLightmaps()
+{
+    UpdateLightmapsCollection(0, 0);
+}
+
+void SceneLightmapsData::LoadLightmaps(Array<SavedLightmapInfo>& lightmaps)
+{
+    // Unload previous
+    UnloadLightmaps();
+
+    if (lightmaps.IsEmpty())
+        return;
+    LOG(Info, "Loading {0} lightmap(s)", lightmaps.Count());
+
+    for (int32 i = 0; i < lightmaps.Count(); i++)
+    {
+        _lightmaps.Add(New<Lightmap>(this, i, lightmaps[i]));
+    }
+}
+
+void SceneLightmapsData::UnloadLightmaps()
+{
+    if (_lightmaps.HasItems())
+    {
+        LOG(Info, "Unloding {0} lightmap(s)", _lightmaps.Count());
+
+        _lightmaps.ClearDelete();
+    }
+}
+
+void SceneLightmapsData::SaveLightmaps(Array<SavedLightmapInfo>& lightmaps)
+{
+    lightmaps.Resize(_lightmaps.Count(), false);
+
+    for (int32 i = 0; i < _lightmaps.Count(); i++)
+    {
+        _lightmaps[i]->GetInfo(lightmaps[i]);
+    }
+}
+
+void SceneLightmapsData::UpdateLightmapsCollection(int32 count, int32 size)
+{
+    // Check if amount will change
+    if (_lightmaps.Count() != count)
+    {
+        LOG(Info, "Changing amount of lightmaps from {0} to {1}", _lightmaps.Count(), count);
+
+        // Remove too many entries
+        while (_lightmaps.Count() > count)
+        {
+            auto lightmap = _lightmaps[count];
+            Delete(lightmap);
+
+            _lightmaps.RemoveAt(count);
+        }
+
+        // Add missing entries
+        while (_lightmaps.Count() < count)
+        {
+            SavedLightmapInfo info;
+            info.Lightmap0 = Guid::Empty;
+            info.Lightmap1 = Guid::Empty;
+            info.Lightmap2 = Guid::Empty;
+            auto lightmap = New<Lightmap>(this, _lightmaps.Count(), info);
+
+            _lightmaps.Add(lightmap);
+        }
+    }
+
+    // Resize invalid size lightmaps
+    for (int32 i = 0; i < _lightmaps.Count(); i++)
+    {
+        _lightmaps[i]->EnsureSize(size);
+    }
+}