WIP fix

Bug is fixed, but appears to have broken vision underwater. Notes:

+ basically fixed by darkening the colour of water such that it is
darker than refracted terrain
+ also disabled sunlight scattering at night. This may actually be
desirable, but given there is no visible moon it seems unlikely to make
much sense, and blends a lot of green into the water colour appearing
luminescent at night

apps/openmw/mwrender/refraction.cpp

@@ -35,7 +35,7 @@ namespace MWRender
         vp->setShadowsEnabled(false);
         vp->setVisibilityMask(RV_Actors + RV_Misc + RV_Statics + RV_StaticsSmall + RV_Terrain + RV_Sky);
         vp->setMaterialScheme("water_refraction");
-        vp->setBackgroundColour (Ogre::ColourValue(0.18039, 0.23137, 0.25490));
+        vp->setBackgroundColour (Ogre::ColourValue(0.090195, 0.115685, 0.12745));
         mRenderTarget->setAutoUpdated(true);
         mRenderTarget->addListener(this);
     }

apps/openmw/mwrender/renderingmanager.cpp

@@ -522,9 +522,10 @@ void RenderingManager::applyFog (bool underwater)
     }
     else
     {
-        mRendering.getScene()->setFog (FOG_LINEAR, Ogre::ColourValue(0.18039, 0.23137, 0.25490), 0, 0, 1000);
-        mRendering.getViewport()->setBackgroundColour (Ogre::ColourValue(0.18039, 0.23137, 0.25490));
-        mWater->setViewportBackground (Ogre::ColourValue(0.18039, 0.23137, 0.25490));
+        //Ogre::ColourValue clv(0.090195, 0.115685, 0.12745);
+        mRendering.getScene()->setFog (FOG_LINEAR, Ogre::ColourValue(clv));
+        mRendering.getViewport()->setBackgroundColour (Ogre::ColourValue(clv));
+        mWater->setViewportBackground (Ogre::ColourValue(clv));
     }
 }
 
@@ -631,12 +632,12 @@ void RenderingManager::sunDisable(bool real)
     }
 }
 
-void RenderingManager::setSunDirection(const Ogre::Vector3& direction)
+void RenderingManager::setSunDirection(const Ogre::Vector3& direction, bool is_moon)
 {
     // direction * -1 (because 'direction' is camera to sun vector and not sun to camera),
     if (mSun) mSun->setDirection(Vector3(-direction.x, -direction.y, -direction.z));
 
-    mSkyManager->setSunDirection(direction);
+    mSkyManager->setSunDirection(direction, is_moon);
 }
 
 void RenderingManager::setGlare(bool glare)

apps/openmw/mwrender/renderingmanager.hpp

@@ -145,7 +145,7 @@ public:
 
     void setAmbientColour(const Ogre::ColourValue& colour);
     void setSunColour(const Ogre::ColourValue& colour);
-    void setSunDirection(const Ogre::Vector3& direction);
+    void setSunDirection(const Ogre::Vector3& direction, bool is_moon);
     void sunEnable(bool real); ///< @param real whether or not to really disable the sunlight (otherwise just set diffuse to 0)
     void sunDisable(bool real);
 

apps/openmw/mwrender/sky.cpp

@@ -546,14 +546,14 @@ void SkyManager::sunDisable()
     mSunEnabled = false;
 }
 
-void SkyManager::setSunDirection(const Vector3& direction)
+void SkyManager::setSunDirection(const Vector3& direction, bool is_moon)
 {
     if (!mCreated) return;
     mSun->setPosition(direction);
     mSunGlare->setPosition(direction);
 
     float height = direction.z;
-    float fade = ( height > 0.5) ? 1.0 : height * 2;
+    float fade = is_moon ? 0.0 : (( height > 0.5) ? 1.0 : height * 2);
     sh::Factory::getInstance ().setSharedParameter ("waterSunFade_sunHeight", sh::makeProperty<sh::Vector2>(new sh::Vector2(fade, height)));
 }
 

apps/openmw/mwrender/sky.hpp

@@ -148,7 +148,7 @@ namespace MWRender
 
         void sunDisable();
 
-        void setSunDirection(const Ogre::Vector3& direction);
+        void setSunDirection(const Ogre::Vector3& direction, bool is_moon);
 
         void setMasserDirection(const Ogre::Vector3& direction);
 

apps/openmw/mwworld/weather.cpp

@@ -378,11 +378,13 @@ void WeatherManager::update(float duration)
 
     int facing = (mHour > 13.f) ? 1 : -1;
 
+    bool sun_is_moon = mHour >= mNightStart || mHour <= mSunriseTime;
+
     Vector3 final(
             (height - 1) * facing,
             (height - 1) * facing,
             height);
-    mRendering->setSunDirection(final);
+    mRendering->setSunDirection(final, sun_is_moon);
 
     /*
      * TODO: import separated fadeInStart/Finish, fadeOutStart/Finish

files/materials/underwater.h

@@ -1,4 +1,4 @@
-#define UNDERWATER_COLOUR float3(0.18039, 0.23137, 0.25490)
+#define UNDERWATER_COLOUR float3(0.090195, 0.115685, 0.12745)
 
 #define VISIBILITY 1000.0      // how far you can look through water
 

files/materials/water.shader

@@ -340,7 +340,7 @@
 
 #if REFRACTION
         float3 refraction = shSample(refractionMap, (screenCoords-(normal.xy*REFR_BUMP))*1.0).rgb;
-        
+
          // brighten up the refraction underwater
         refraction = (cameraPos.z < 0) ? shSaturate(refraction * 1.5) : refraction;
 #endif
@@ -351,7 +351,7 @@
 #if REFRACTION
         shOutputColour(0).xyz = shLerp(  shLerp(refraction, scatterColour, lightScatter), reflection, fresnel) + specular * sunSpecular.xyz;
 #else
-        shOutputColour(0).xyz = shLerp(reflection, float3(0.18039, 0.23137, 0.25490), (1.0-fresnel)*0.5) + specular * sunSpecular.xyz;
+        shOutputColour(0).xyz = shLerp(reflection, float3(0.090195, 0.115685, 0.12745), (1.0-fresnel)*0.5) + specular * sunSpecular.xyz;
 #endif
         // fog
         float fogValue = shSaturate((depthPassthrough - fogParams.y) * fogParams.w);