Merge pull request #1473

apps/openmw/mwrender/renderingmanager.cpp

@@ -51,6 +51,16 @@
 #include "terrainstorage.hpp"
 #include "util.hpp"
 
+namespace
+{
+    float DLLandFogStart;
+    float DLLandFogEnd;
+    float DLUnderwaterFogStart;
+    float DLUnderwaterFogEnd;
+    float DLInteriorFogStart;
+    float DLInteriorFogEnd;
+}
+
 namespace MWRender
 {
 
@@ -173,14 +183,18 @@ namespace MWRender
         , mResourceSystem(resourceSystem)
         , mWorkQueue(workQueue)
         , mUnrefQueue(new SceneUtil::UnrefQueue)
-        , mFogDepth(0.f)
+        , mLandFogStart(0.f)
+        , mLandFogEnd(std::numeric_limits<float>::max())
+        , mUnderwaterFogStart(0.f)
+        , mUnderwaterFogEnd(std::numeric_limits<float>::max())
         , mUnderwaterColor(fallback->getFallbackColour("Water_UnderwaterColor"))
         , mUnderwaterWeight(fallback->getFallbackFloat("Water_UnderwaterColorWeight"))
-        , mUnderwaterFog(0.f)
         , mUnderwaterIndoorFog(fallback->getFallbackFloat("Water_UnderwaterIndoorFog"))
         , mNightEyeFactor(0.f)
-        , mFieldOfViewOverride(0.f)
+        , mDistantFog(false)
+        , mDistantTerrain(false)
         , mFieldOfViewOverridden(false)
+        , mFieldOfViewOverride(0.f)
     {
         resourceSystem->getSceneManager()->setParticleSystemMask(MWRender::Mask_ParticleSystem);
         resourceSystem->getSceneManager()->setShaderPath(resourcePath + "/shaders");
@@ -216,12 +230,20 @@ namespace MWRender
 
         mWater.reset(new Water(mRootNode, sceneRoot, mResourceSystem, mViewer->getIncrementalCompileOperation(), fallback, resourcePath));
 
-        const bool distantTerrain = Settings::Manager::getBool("distant terrain", "Terrain");
+        DLLandFogStart = Settings::Manager::getFloat("distant land fog start", "Fog");
+        DLLandFogEnd = Settings::Manager::getFloat("distant land fog end", "Fog");
+        DLUnderwaterFogStart = Settings::Manager::getFloat("distant underwater fog start", "Fog");
+        DLUnderwaterFogEnd = Settings::Manager::getFloat("distant underwater fog end", "Fog");
+        DLInteriorFogStart = Settings::Manager::getFloat("distant interior fog start", "Fog");
+        DLInteriorFogEnd = Settings::Manager::getFloat("distant interior fog end", "Fog");
+
+        mDistantFog = Settings::Manager::getBool("use distant fog", "Fog");
+        mDistantTerrain = Settings::Manager::getBool("distant terrain", "Terrain");
         mTerrainStorage = new TerrainStorage(mResourceSystem, Settings::Manager::getString("normal map pattern", "Shaders"), Settings::Manager::getString("normal height map pattern", "Shaders"),
-                                            Settings::Manager::getBool("auto use terrain normal maps", "Shaders"), Settings::Manager::getString("terrain specular map pattern", "Shaders"),
+                                             Settings::Manager::getBool("auto use terrain normal maps", "Shaders"), Settings::Manager::getString("terrain specular map pattern", "Shaders"),
                                              Settings::Manager::getBool("auto use terrain specular maps", "Shaders"));
 
-        if (distantTerrain)
+        if (mDistantTerrain)
             mTerrain.reset(new Terrain::QuadTreeWorld(sceneRoot, mRootNode, mResourceSystem, mTerrainStorage, Mask_Terrain, Mask_PreCompile));
         else
             mTerrain.reset(new Terrain::TerrainGrid(sceneRoot, mRootNode, mResourceSystem, mTerrainStorage, Mask_Terrain, Mask_PreCompile));
@@ -479,14 +501,44 @@ namespace MWRender
     {
         osg::Vec4f color = SceneUtil::colourFromRGB(cell->mAmbi.mFog);
 
-        configureFog (cell->mAmbi.mFogDensity, mUnderwaterIndoorFog, color);
+        if(mDistantFog)
+        {
+            float density = std::max(0.2f, cell->mAmbi.mFogDensity);
+            mLandFogStart = (DLInteriorFogEnd*(1.0f-density) + DLInteriorFogStart*density);
+            mLandFogEnd = DLInteriorFogEnd;
+            mUnderwaterFogStart = DLUnderwaterFogStart;
+            mUnderwaterFogEnd = DLUnderwaterFogEnd;
+            mFogColor = color;
+        }
+        else
+            configureFog(cell->mAmbi.mFogDensity, mUnderwaterIndoorFog, 1.0f, 0.0f, color);
     }
 
-    void RenderingManager::configureFog(float fogDepth, float underwaterFog, const osg::Vec4f &color)
+    void RenderingManager::configureFog(float fogDepth, float underwaterFog, float dlFactor, float dlOffset, const osg::Vec4f &color)
     {
-        mFogDepth = fogDepth;
+        if(mDistantFog)
+        {
+            mLandFogStart = dlFactor * (DLLandFogStart - dlOffset*DLLandFogEnd);
+            mLandFogEnd = dlFactor * (1.0f-dlOffset) * DLLandFogEnd;
+            mUnderwaterFogStart = DLUnderwaterFogStart;
+            mUnderwaterFogEnd = DLUnderwaterFogEnd;
+        }
+        else
+        {
+            if(fogDepth == 0.0)
+            {
+                mLandFogStart = 0.0f;
+                mLandFogEnd = std::numeric_limits<float>::max();
+            }
+            else
+            {
+                mLandFogStart = mViewDistance * (1 - fogDepth);
+                mLandFogEnd = mViewDistance;
+            }
+            mUnderwaterFogStart = mViewDistance * (1 - underwaterFog);
+            mUnderwaterFogEnd = mViewDistance;
+        }
         mFogColor = color;
-        mUnderwaterFog = underwaterFog;
     }
 
     SkyManager* RenderingManager::getSkyManager()
@@ -517,23 +569,15 @@ namespace MWRender
             float viewDistance = mViewDistance;
             viewDistance = std::min(viewDistance, 6666.f);
             setFogColor(mUnderwaterColor * mUnderwaterWeight + mFogColor * (1.f-mUnderwaterWeight));
-            mStateUpdater->setFogStart(viewDistance * (1 - mUnderwaterFog));
-            mStateUpdater->setFogEnd(viewDistance);
+            mStateUpdater->setFogStart(mUnderwaterFogStart);
+            mStateUpdater->setFogEnd(mUnderwaterFogEnd);
         }
         else
         {
             setFogColor(mFogColor);
 
-            if (mFogDepth == 0.f)
-            {
-                mStateUpdater->setFogStart(0.f);
-                mStateUpdater->setFogEnd(std::numeric_limits<float>::max());
-            }
-            else
-            {
-                mStateUpdater->setFogStart(mViewDistance * (1 - mFogDepth));
-                mStateUpdater->setFogEnd(mViewDistance);
-            }
+            mStateUpdater->setFogStart(mLandFogStart);
+            mStateUpdater->setFogEnd(mLandFogEnd);
         }
     }
 
@@ -960,7 +1004,8 @@ namespace MWRender
             else if (it->first == "Camera" && it->second == "viewing distance")
             {
                 mViewDistance = Settings::Manager::getFloat("viewing distance", "Camera");
-                mStateUpdater->setFogEnd(mViewDistance);
+                if(!mDistantFog)
+                    mStateUpdater->setFogEnd(mViewDistance);
                 updateProjectionMatrix();
             }
             else if (it->first == "General" && (it->second == "texture filter" ||

apps/openmw/mwrender/renderingmanager.hpp

@@ -106,7 +106,7 @@ namespace MWRender
 
         void configureAmbient(const ESM::Cell* cell);
         void configureFog(const ESM::Cell* cell);
-        void configureFog(float fogDepth, float underwaterFog, const osg::Vec4f& colour);
+        void configureFog(float fogDepth, float underwaterFog, float dlFactor, float dlOffset, const osg::Vec4f& colour);
 
         void addCell(const MWWorld::CellStore* store);
         void removeCell(const MWWorld::CellStore* store);
@@ -241,10 +241,12 @@ namespace MWRender
 
         osg::ref_ptr<StateUpdater> mStateUpdater;
 
-        float mFogDepth;
+        float mLandFogStart;
+        float mLandFogEnd;
+        float mUnderwaterFogStart;
+        float mUnderwaterFogEnd;
         osg::Vec4f mUnderwaterColor;
         float mUnderwaterWeight;
-        float mUnderwaterFog;
         float mUnderwaterIndoorFog;
         osg::Vec4f mFogColor;
 
@@ -253,8 +255,10 @@ namespace MWRender
 
         float mNearClip;
         float mViewDistance;
+        bool mDistantFog : 1;
+        bool mDistantTerrain : 1;
+        bool mFieldOfViewOverridden : 1;
         float mFieldOfViewOverride;
-        bool mFieldOfViewOverridden;
         float mFieldOfView;
         float mFirstPersonFieldOfView;
 

apps/openmw/mwrender/sky.hpp

@@ -65,6 +65,9 @@ namespace MWRender
 
         float mFogDepth;
 
+        float mDLFogFactor;
+        float mDLFogOffset;
+
         float mWindSpeed;
 
         float mCloudSpeed;

apps/openmw/mwworld/weather.cpp

@@ -102,6 +102,8 @@ Weather::Weather(const std::string& name,
                  const Fallback::Map& fallback,
                  float stormWindSpeed,
                  float rainSpeed,
+                 float dlFactor,
+                 float dlOffset,
                  const std::string& particleEffect)
     : mCloudTexture(fallback.getFallbackString("Weather_" + name + "_Cloud_Texture"))
     , mSkyColor(fallback.getFallbackColour("Weather_" + name +"_Sky_Sunrise_Color"),
@@ -141,6 +143,8 @@ Weather::Weather(const std::string& name,
     , mFlashDecrement(fallback.getFallbackFloat("Weather_" + name + "_Flash_Decrement"))
     , mFlashBrightness(0.0f)
 {
+    mDL.FogFactor = dlFactor;
+    mDL.FogOffset = dlOffset;
     mThunderSoundID[0] = fallback.getFallbackString("Weather_" + name + "_Thunder_Sound_ID_0");
     mThunderSoundID[1] = fallback.getFallbackString("Weather_" + name + "_Thunder_Sound_ID_1");
     mThunderSoundID[2] = fallback.getFallbackString("Weather_" + name + "_Thunder_Sound_ID_2");
@@ -541,16 +545,18 @@ WeatherManager::WeatherManager(MWRender::RenderingManager& rendering, const Fall
     mTimeSettings.mSunriseTime = mSunriseTime;
 
     mWeatherSettings.reserve(10);
-    addWeather("Clear", fallback); // 0
-    addWeather("Cloudy", fallback); // 1
-    addWeather("Foggy", fallback); // 2
-    addWeather("Overcast", fallback); // 3
-    addWeather("Rain", fallback); // 4
-    addWeather("Thunderstorm", fallback); // 5
-    addWeather("Ashstorm", fallback, "meshes\\ashcloud.nif"); // 6
-    addWeather("Blight", fallback, "meshes\\blightcloud.nif"); // 7
-    addWeather("Snow", fallback, "meshes\\snow.nif"); // 8
-    addWeather("Blizzard", fallback, "meshes\\blizzard.nif"); // 9
+    // These distant land fog factor and offset values are the defaults MGE XE provides. Should be
+    // provided by settings somewhere?
+    addWeather("Clear", fallback, 1.0f, 0.0f); // 0
+    addWeather("Cloudy", fallback, 0.9f, 0.0f); // 1
+    addWeather("Foggy", fallback, 0.2f, 30.0f); // 2
+    addWeather("Overcast", fallback, 0.7f, 0.0f); // 3
+    addWeather("Rain", fallback, 0.5f, 10.0f); // 4
+    addWeather("Thunderstorm", fallback, 0.5f, 20.0f); // 5
+    addWeather("Ashstorm", fallback, 0.2f, 50.0f, "meshes\\ashcloud.nif"); // 6
+    addWeather("Blight", fallback, 0.2f, 60.0f, "meshes\\blightcloud.nif"); // 7
+    addWeather("Snow", fallback, 0.5f, 40.0f, "meshes\\snow.nif"); // 8
+    addWeather("Blizzard", fallback, 0.16f, 70.0f, "meshes\\blizzard.nif"); // 9
 
     Store<ESM::Region>::iterator it = store.get<ESM::Region>().begin();
     for(; it != store.get<ESM::Region>().end(); ++it)
@@ -718,7 +724,8 @@ void WeatherManager::update(float duration, bool paused, const TimeStamp& time,
     mRendering.getSkyManager()->setMasserState(mMasser.calculateState(time));
     mRendering.getSkyManager()->setSecundaState(mSecunda.calculateState(time));
 
-    mRendering.configureFog(mResult.mFogDepth, underwaterFog, mResult.mFogColor);
+    mRendering.configureFog(mResult.mFogDepth, underwaterFog, mResult.mDLFogFactor,
+                            mResult.mDLFogOffset/100.0f, mResult.mFogColor);
     mRendering.setAmbientColour(mResult.mAmbientColor);
     mRendering.setSunColour(mResult.mSunColor, mResult.mSunColor * mResult.mGlareView);
 
@@ -863,11 +870,12 @@ void WeatherManager::clear()
 
 inline void WeatherManager::addWeather(const std::string& name,
                                        const Fallback::Map& fallback,
+                                       float dlFactor, float dlOffset,
                                        const std::string& particleEffect)
 {
     static const float fStromWindSpeed = mStore.get<ESM::GameSetting>().find("fStromWindSpeed")->getFloat();
 
-    Weather weather(name, fallback, fStromWindSpeed, mRainSpeed, particleEffect);
+    Weather weather(name, fallback, fStromWindSpeed, mRainSpeed, dlFactor, dlOffset, particleEffect);
 
     mWeatherSettings.push_back(weather);
 }
@@ -1055,6 +1063,8 @@ inline void WeatherManager::calculateResult(const int weatherID, const float gam
     mResult.mNight = (gameHour < mSunriseTime || gameHour > mTimeSettings.mNightStart - 1);
 
     mResult.mFogDepth = current.mLandFogDepth.getValue(gameHour, mTimeSettings);
+    mResult.mDLFogFactor = current.mDL.FogFactor;
+    mResult.mDLFogOffset = current.mDL.FogOffset;
     mResult.mFogColor = current.mFogColor.getValue(gameHour, mTimeSettings);
     mResult.mAmbientColor = current.mAmbientColor.getValue(gameHour, mTimeSettings);
     mResult.mSunColor = current.mSunColor.getValue(gameHour, mTimeSettings);
@@ -1110,6 +1120,8 @@ inline void WeatherManager::calculateTransitionResult(const float factor, const
     mResult.mAmbientColor = lerp(current.mAmbientColor, other.mAmbientColor, factor);
     mResult.mSunDiscColor = lerp(current.mSunDiscColor, other.mSunDiscColor, factor);
     mResult.mFogDepth = lerp(current.mFogDepth, other.mFogDepth, factor);
+    mResult.mDLFogFactor = lerp(current.mDLFogFactor, other.mDLFogFactor, factor);
+    mResult.mDLFogOffset = lerp(current.mDLFogOffset, other.mDLFogOffset, factor);
     mResult.mWindSpeed = lerp(current.mWindSpeed, other.mWindSpeed, factor);
     mResult.mCloudSpeed = lerp(current.mCloudSpeed, other.mCloudSpeed, factor);
     mResult.mGlareView = lerp(current.mGlareView, other.mGlareView, factor);

apps/openmw/mwworld/weather.hpp

@@ -73,6 +73,8 @@ namespace MWWorld
                 const Fallback::Map& fallback,
                 float stormWindSpeed,
                 float rainSpeed,
+                float dlFactor,
+                float dlOffset,
                 const std::string& particleEffect);
 
         std::string mCloudTexture;
@@ -102,6 +104,12 @@ namespace MWWorld
         // Also appears to modify how visible the sun, moons, and stars are for various weather effects.
         float mGlareView;
 
+        // Fog factor and offset used with distant land rendering.
+        struct {
+            float FogFactor;
+            float FogOffset;
+        } mDL;
+
         // Sound effect
         // This is used for Blight, Ashstorm and Blizzard (Bloodmoon)
         std::string mAmbientLoopSoundID;
@@ -293,6 +301,7 @@ namespace MWWorld
 
         void addWeather(const std::string& name,
                         const Fallback::Map& fallback,
+                        float dlFactor, float dlOffset,
                         const std::string& particleEffect = "");
 
         void importRegions();

files/settings-default.cfg

@@ -90,6 +90,24 @@ pointers cache size = 40
 # If true, use paging and LOD algorithms to display the entire terrain. If false, only display terrain of the loaded cells
 distant terrain = false
 
+[Fog]
+
+# If true, use extended fog parameters for distant terrain not controlled by
+# viewing distance. If false, use the standard fog calculations.
+use distant fog = false
+
+distant land fog start = 16384
+
+distant land fog end = 40960
+
+distant underwater fog start = -4096
+
+distant underwater fog end = 2457.6
+
+distant interior fog start = 0
+
+distant interior fog end = 16384
+
 [Map]
 
 # Size of each exterior cell in pixels in the world map. (e.g. 12 to 24).