Implement ashstorm, blightstorm, snow and blizzard effects (Feature #41)

apps/openmw/mwrender/sky.cpp

@@ -8,10 +8,11 @@
 #include <OgreSceneManager.h>
 #include <OgreHardwareVertexBuffer.h>
 #include <OgreHighLevelGpuProgramManager.h>
-#include <OgreBillboardSet.h>
+#include <OgreParticleSystem.h>
 #include <OgreEntity.h>
 #include <OgreSubEntity.h>
 #include <OgreTechnique.h>
+#include <OgreControllerManager.h>
 
 #include <OgreMeshManager.h>
 
@@ -234,6 +235,7 @@ SkyManager::SkyManager(Ogre::SceneNode *root, Ogre::Camera *pCamera)
     , mCreated(false)
     , mCloudAnimationTimer(0.f)
     , mMoonRed(false)
+    , mParticleNode(NULL)
 {
     mSceneMgr = root->getCreator();
     mRootNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
@@ -372,6 +374,12 @@ void SkyManager::update(float duration)
     if (!mEnabled) return;
     const MWWorld::Fallback* fallback=MWBase::Environment::get().getWorld()->getFallback();
 
+    if (!mParticle.isNull())
+    {
+        for (unsigned int i=0; i<mParticle->mControllers.size(); ++i)
+            mParticle->mControllers[i].update();
+    }
+
     // UV Scroll the clouds
     mCloudAnimationTimer += duration * mCloudSpeed;
     sh::Factory::getInstance().setSharedParameter ("cloudAnimationTimer",
@@ -441,6 +449,37 @@ void SkyManager::setWeather(const MWWorld::WeatherResult& weather)
 {
     if (!mCreated) return;
 
+    if (mCurrentParticleEffect != weather.mParticleEffect)
+    {
+        mCurrentParticleEffect = weather.mParticleEffect;
+
+        if (mCurrentParticleEffect.empty())
+        {
+            mParticle.setNull();
+        }
+        else
+        {
+            if (!mParticleNode)
+            {
+                mParticleNode = mCamera->getParentSceneNode()->createChildSceneNode();
+                mParticleNode->setInheritOrientation(false);
+            }
+
+            mParticle = NifOgre::Loader::createObjects(mParticleNode, mCurrentParticleEffect);
+            for(size_t i = 0; i < mParticle->mParticles.size(); ++i)
+            {
+                ParticleSystem* particle = mParticle->mParticles[i];
+                particle->setRenderQueueGroup(RQG_Alpha);
+                particle->setVisibilityFlags(RV_Sky);
+            }
+            for (size_t i = 0; i < mParticle->mControllers.size(); ++i)
+            {
+                if (mParticle->mControllers[i].getSource().isNull())
+                    mParticle->mControllers[i].setSource(Ogre::ControllerManager::getSingleton().getFrameTimeSource());
+            }
+        }
+    }
+
     if (mClouds != weather.mCloudTexture)
     {
         sh::Factory::getInstance().setTextureAlias ("cloud_texture_1", "textures\\"+weather.mCloudTexture);

apps/openmw/mwrender/sky.hpp

@@ -200,6 +200,9 @@ namespace MWRender
 
         std::vector<NifOgre::ObjectScenePtr> mObjects;
 
+        Ogre::SceneNode* mParticleNode;
+        NifOgre::ObjectScenePtr mParticle;
+
         // remember some settings so we don't have to apply them again if they didnt change
         Ogre::String mClouds;
         Ogre::String mNextClouds;
@@ -211,6 +214,8 @@ namespace MWRender
         Ogre::ColourValue mSkyColour;
         Ogre::ColourValue mFogColour;
 
+        std::string mCurrentParticleEffect;
+
         Ogre::Light* mLightning;
 
         float mRemainingTransitionTime;

apps/openmw/mwworld/weather.cpp

@@ -58,6 +58,11 @@ void WeatherManager::setFallbackWeather(Weather& weather,const std::string& name
     weather.mWindSpeed = mFallback->getFallbackFloat("Weather_"+upper+"_Wind_Speed");
     weather.mCloudSpeed = mFallback->getFallbackFloat("Weather_"+upper+"_Cloud_Speed");
     weather.mGlareView = mFallback->getFallbackFloat("Weather_"+upper+"_Glare_View");
+    weather.mCloudTexture = mFallback->getFallbackString("Weather_"+upper+"_Cloud_Texture");
+    size_t offset = weather.mCloudTexture.find(".tga");
+    if (offset != std::string::npos)
+        weather.mCloudTexture.replace(offset, weather.mCloudTexture.length() - offset, ".dds");
+
     mWeatherSettings[name] = weather;
 }
 
@@ -123,48 +128,42 @@ WeatherManager::WeatherManager(MWRender::RenderingManager* rendering,MWWorld::Fa
 
     //Weather
     Weather clear;
-    clear.mCloudTexture = "tx_sky_clear.dds";
     setFallbackWeather(clear,"clear");
 
     Weather cloudy;
-    cloudy.mCloudTexture = "tx_sky_cloudy.dds";
     setFallbackWeather(cloudy,"cloudy");
 
     Weather foggy;
-    foggy.mCloudTexture = "tx_sky_foggy.dds";
     setFallbackWeather(foggy,"foggy");
 
     Weather thunderstorm;
-    thunderstorm.mCloudTexture = "tx_sky_thunder.dds";
     thunderstorm.mRainLoopSoundID = "rain heavy";
     setFallbackWeather(thunderstorm,"thunderstorm");
 
     Weather rain;
-    rain.mCloudTexture = "tx_sky_rainy.dds";
     rain.mRainLoopSoundID = "rain";
     setFallbackWeather(rain,"rain");
 
     Weather overcast;
-    overcast.mCloudTexture = "tx_sky_overcast.dds";
     setFallbackWeather(overcast,"overcast");
 
     Weather ashstorm;
-    ashstorm.mCloudTexture = "tx_sky_ashstorm.dds";
     ashstorm.mAmbientLoopSoundID = "ashstorm";
+    ashstorm.mParticleEffect = "meshes\\ashcloud.nif";
     setFallbackWeather(ashstorm,"ashstorm");
 
     Weather blight;
-    blight.mCloudTexture = "tx_sky_blight.dds";
     blight.mAmbientLoopSoundID = "blight";
+    blight.mParticleEffect = "meshes\\blightcloud.nif";
     setFallbackWeather(blight,"blight");
 
     Weather snow;
-    snow.mCloudTexture = "tx_bm_sky_snow.dds";
+    snow.mParticleEffect = "meshes\\snow.nif";
     setFallbackWeather(snow, "snow");
 
     Weather blizzard;
-    blizzard.mCloudTexture = "tx_bm_sky_blizzard.dds";
     blizzard.mAmbientLoopSoundID = "BM Blizzard";
+    blizzard.mParticleEffect = "meshes\\blizzard.nif";
     setFallbackWeather(blizzard,"blizzard");
 }
 
@@ -214,6 +213,8 @@ void WeatherManager::setResult(const String& weatherType)
     mResult.mAmbientLoopSoundID = current.mAmbientLoopSoundID;
     mResult.mSunColor = current.mSunDiscSunsetColor;
 
+    mResult.mParticleEffect = current.mParticleEffect;
+
     mResult.mNight = (mHour < mSunriseTime || mHour > mNightStart - 1);
 
     mResult.mFogDepth = mResult.mNight ? current.mLandFogNightDepth : current.mLandFogDayDepth;
@@ -316,6 +317,8 @@ void WeatherManager::transition(float factor)
     mResult.mNightFade = lerp(current.mNightFade, other.mNightFade, factor);
 
     mResult.mNight = current.mNight;
+
+    mResult.mParticleEffect = current.mParticleEffect;
 }
 
 void WeatherManager::update(float duration)

apps/openmw/mwworld/weather.hpp

@@ -58,6 +58,8 @@ namespace MWWorld
         float mNightFade; // fading factor for night skybox
 
         std::string mAmbientLoopSoundID;
+
+        std::string mParticleEffect;
     };
 
 
@@ -119,7 +121,10 @@ namespace MWWorld
         // Rain sound effect
         std::string mRainLoopSoundID;
 
-        /// \todo disease chance
+        std::string mParticleEffect;
+
+        // Note: For Weather Blight, there is a "Disease Chance" (=0.1) setting. But according to MWSFD this feature
+        // is broken in the vanilla game and was disabled.
     };
 
     ///