Fix incorrect minimum ambient

AUTHORS.md

@@ -49,6 +49,7 @@ Programmers
     Cédric Mocquillon
     Chris Boyce (slothlife)
     Chris Robinson (KittyCat)
+    Cody Glassman (Wazabear)
     Coleman Smith (olcoal)
     Cory F. Cohen (cfcohen)
     Cris Mihalache (Mirceam)

apps/openmw/mwrender/renderingmanager.cpp

@@ -537,7 +537,32 @@ namespace MWRender
 
     void RenderingManager::configureAmbient(const ESM::Cell *cell)
     {
-        setAmbientColour(SceneUtil::colourFromRGB(cell->mAmbi.mAmbient));
+        bool needsAdjusting = false;
+        if (mResourceSystem->getSceneManager()->getLightingMethod() != SceneUtil::LightingMethod::FFP)
+            needsAdjusting = !cell->isExterior() && !(cell->mData.mFlags & ESM::Cell::QuasiEx);
+
+        auto ambient = SceneUtil::colourFromRGB(cell->mAmbi.mAmbient);
+
+        if (needsAdjusting)
+        {
+            static constexpr float pR = 0.2126;
+            static constexpr float pG = 0.7152;
+            static constexpr float pB = 0.0722;
+
+            // we already work in linear RGB so no conversions are needed for the luminosity function
+            float relativeLuminance = pR*ambient.r() + pG*ambient.g() + pB*ambient.b();
+            if (relativeLuminance < mMinimumAmbientLuminance)
+            {
+                // brighten ambient so it reaches the minimum threshold but no more, we want to mess with content data as least we can
+                float targetBrightnessIncreaseFactor = mMinimumAmbientLuminance / relativeLuminance;
+                if (ambient.r() == 0.f && ambient.g() == 0.f && ambient.b() == 0.f)
+                    ambient = osg::Vec4(targetBrightnessIncreaseFactor, targetBrightnessIncreaseFactor, targetBrightnessIncreaseFactor, ambient.a());
+                else
+                    ambient *= targetBrightnessIncreaseFactor;
+            }
+        }
+
+        setAmbientColour(ambient);
 
         osg::Vec4f diffuse = SceneUtil::colourFromRGB(cell->mAmbi.mSunlight);
         mSunLight->setDiffuse(diffuse);
@@ -1076,25 +1101,7 @@ namespace MWRender
         osg::Vec4f color = mAmbientColor;
 
         if (mNightEyeFactor > 0.f)
-        {
             color += osg::Vec4f(0.7, 0.7, 0.7, 0.0) * mNightEyeFactor;
-        }
-        // optionally brighten up ambient interiors when using a non-FFP emulated lighting method
-        else if (mResourceSystem->getSceneManager()->getLightingMethod() != SceneUtil::LightingMethod::FFP)
-        {
-            static constexpr float pR = 0.2126;
-            static constexpr float pG = 0.7152;
-            static constexpr float pB = 0.0722;
-
-            // we already work in linear RGB so no conversions are needed for the luminosity function
-            float relativeLuminance = pR*color.r() + pG*color.g() + pB*color.b();
-            if (relativeLuminance < mMinimumAmbientLuminance)
-            {
-                // brighten ambient so it reaches the minimum threshold but no more, we want to mess with content data as least we can
-                float targetBrightnessIncreaseFactor = mMinimumAmbientLuminance / relativeLuminance;
-                color *= targetBrightnessIncreaseFactor;
-            }
-        }
 
         mStateUpdater->setAmbientColor(color);
     }

components/sceneutil/lightmanager.cpp

@@ -381,27 +381,14 @@ namespace SceneUtil
 
         void apply(osg::State &state) const override
         {
-            osg::Matrix modelViewMatrix = state.getModelViewMatrix();
-
-            state.applyModelViewMatrix(state.getInitialViewMatrix());
-
-            LightStateCache* cache = getLightStateCache(state.getContextID(), mLightManager->getMaxLights());
             for (size_t i = 0; i < mLights.size(); ++i)
             {
-                osg::Light* current = cache->lastAppliedLight[i];
                 auto light = mLights[i];
-                if (current != light.get())
-                {
-                    mLightManager->getLightUniform(i+1, LightManager::UniformKey::Diffuse)->set(light->getDiffuse());
-                    mLightManager->getLightUniform(i+1, LightManager::UniformKey::Ambient)->set(light->getAmbient());
-                    mLightManager->getLightUniform(i+1, LightManager::UniformKey::Attenuation)->set(osg::Vec4(light->getConstantAttenuation(), light->getLinearAttenuation(), light->getQuadraticAttenuation(), getLightRadius(light)));
-                    mLightManager->getLightUniform(i+1, LightManager::UniformKey::Position)->set(light->getPosition() * state.getModelViewMatrix());
-
-                    cache->lastAppliedLight[i] = mLights[i];
-                }
+                mLightManager->getLightUniform(i+1, LightManager::UniformKey::Diffuse)->set(light->getDiffuse());
+                mLightManager->getLightUniform(i+1, LightManager::UniformKey::Ambient)->set(light->getAmbient());
+                mLightManager->getLightUniform(i+1, LightManager::UniformKey::Attenuation)->set(osg::Vec4(light->getConstantAttenuation(), light->getLinearAttenuation(), light->getQuadraticAttenuation(), getLightRadius(light)));
+                mLightManager->getLightUniform(i+1, LightManager::UniformKey::Position)->set(light->getPosition() * state.getInitialViewMatrix());
             }
-
-            state.applyModelViewMatrix(modelViewMatrix);
         }
 
     private:
@@ -643,7 +630,7 @@ namespace SceneUtil
             mDummyProgram->addBindUniformBlock("LightBufferBinding", static_cast<int>(Shader::UBOBinding::LightBuffer));
             // Needed to query the layout of the buffer object. The layout specifier needed to use the std140 layout is not reliably
             // available, regardless of extensions, until GLSL 140.
-            mLightManager->getOrCreateStateSet()->setAttributeAndModes(mDummyProgram, osg::StateAttribute::ON|osg::StateAttribute::PROTECTED);
+            mLightManager->getOrCreateStateSet()->setAttributeAndModes(mDummyProgram, osg::StateAttribute::ON);
         }
 
         LightManagerStateAttribute(const LightManagerStateAttribute& copy, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY)
@@ -756,9 +743,10 @@ namespace SceneUtil
         , mPointLightFadeEnd(0.f)
         , mPointLightFadeStart(0.f)
     {
+        setUpdateCallback(new LightManagerUpdateCallback);
+
         if (ffp)
         {
-            setLightingMethod(LightingMethod::FFP);
             initFFP(LightManager::mFFPMaxLights);
             return;
         }
@@ -769,11 +757,7 @@ namespace SceneUtil
         {
             Log(Debug::Error) << "Invalid option for 'lighting method': got '" << lightingMethodString
                               << "', expected legacy, shaders compatible, or shaders. Falling back to 'shaders compatible'.";
-            setLightingMethod(LightingMethod::PerObjectUniform);
-        }
-        else
-        {
-            setLightingMethod(lightingMethod);
+            lightingMethod = LightingMethod::PerObjectUniform;
         }
 
         mPointLightRadiusMultiplier = std::clamp(Settings::Manager::getFloat("light bounds multiplier", "Shaders"), 0.f, 10.f);
@@ -791,7 +775,7 @@ namespace SceneUtil
 
         static bool hasLoggedWarnings = false;
 
-        if (getLightingMethod() == LightingMethod::SingleUBO && !hasLoggedWarnings)
+        if (lightingMethod == LightingMethod::SingleUBO && !hasLoggedWarnings)
         {
             if (!supportsUBO)
                 Log(Debug::Warning) << "GL_ARB_uniform_buffer_object not supported: switching to shader compatibility lighting mode";
@@ -802,19 +786,13 @@ namespace SceneUtil
 
         int targetLights = Settings::Manager::getInt("max lights", "Shaders");
 
-        if (!supportsUBO || !supportsGPU4 || getLightingMethod() == LightingMethod::PerObjectUniform)
-        {
-            setLightingMethod(LightingMethod::PerObjectUniform);
+        if (!supportsUBO || !supportsGPU4 || lightingMethod == LightingMethod::PerObjectUniform)
             initPerObjectUniform(targetLights);
-        }
         else
-        {
             initSingleUBO(targetLights);
-        }
 
         getOrCreateStateSet()->addUniform(new osg::Uniform("PointLightCount", 0));
 
-        setUpdateCallback(new LightManagerUpdateCallback);
         addCullCallback(new LightManagerCullCallback(this));
     }
 
@@ -876,18 +854,18 @@ namespace SceneUtil
 
     void LightManager::initFFP(int targetLights)
     {
+        setLightingMethod(LightingMethod::FFP);
         setMaxLights(targetLights);
 
         for (int i = 0; i < getMaxLights(); ++i)
             mDummies.push_back(new FFPLightStateAttribute(i, std::vector<osg::ref_ptr<osg::Light>>()));
-
-        setUpdateCallback(new LightManagerUpdateCallback);
     }
 
     void LightManager::initPerObjectUniform(int targetLights)
     {
         auto* stateset = getOrCreateStateSet();
 
+        setLightingMethod(LightingMethod::PerObjectUniform);
         setMaxLights(std::max(2, targetLights));
 
         mLightUniforms.resize(getMaxLights()+1);
@@ -918,6 +896,7 @@ namespace SceneUtil
 
     void LightManager::initSingleUBO(int targetLights)
     {
+        setLightingMethod(LightingMethod::SingleUBO);
         setMaxLights(std::clamp(targetLights, 2, getMaxLightsInScene() / 2));
 
         for (int i = 0; i < 2; ++i)
@@ -1059,6 +1038,7 @@ namespace SceneUtil
 
     const std::vector<LightManager::LightSourceViewBound>& LightManager::getLightsInViewSpace(osg::Camera *camera, const osg::RefMatrix* viewMatrix, size_t frameNum)
     {
+        bool isReflectionCamera = camera->getName() == "ReflectionCamera";
         osg::observer_ptr<osg::Camera> camPtr (camera);
         auto it = mLightsInViewSpace.find(camPtr);
 
@@ -1075,17 +1055,18 @@ namespace SceneUtil
                 osg::BoundingSphere viewBound = osg::BoundingSphere(osg::Vec3f(0,0,0), radius * mPointLightRadiusMultiplier);
                 transformBoundingSphere(worldViewMat, viewBound);
 
-                static const float fadeDelta = mPointLightFadeEnd - mPointLightFadeStart;
-
-                if (mPointLightFadeEnd != 0.f)
+                if (!isReflectionCamera)
                 {
-                    float fade = 1 - std::clamp((viewBound.center().length() - mPointLightFadeStart) / fadeDelta, 0.f, 1.f);
-
-                    if (fade == 0.f)
-                        continue;
+                    static const float fadeDelta = mPointLightFadeEnd - mPointLightFadeStart;
+                    if (mPointLightFadeEnd != 0.f)
+                    {
+                        float fade = 1 - std::clamp((viewBound.center().length() - mPointLightFadeStart) / fadeDelta, 0.f, 1.f);
+                        if (fade == 0.f)
+                            continue;
 
-                    auto* light = transform.mLightSource->getLight(frameNum);
-                    light->setDiffuse(light->getDiffuse() * fade);
+                        auto* light = transform.mLightSource->getLight(frameNum);
+                        light->setDiffuse(light->getDiffuse() * fade);
+                    }
                 }
 
                 LightSourceViewBound l;

docs/source/reference/modding/settings/shaders.rst

@@ -160,12 +160,12 @@ Sets the internal handling of light sources.
 'legacy' is restricted to 8 lights per object and emulates fixed function
 pipeline compatible lighting.
 
-'shaders compatibility' removes the light limit via :ref:`max lights` and
-follows a modifed attenuation formula which can drastically reduce light popping
-and seams. This mode also enables lighting on groundcover and a configurable
-light fade. It is recommended to use this with older hardware and a light limit
-closer to 8. Because of its wide range of compatibility it is set as the
-default.
+'shaders compatibility' removes the light limit controllable through :ref:`max
+lights` and follows a modifed attenuation formula which can drastically reduce
+light popping and seams. This mode also enables lighting on groundcover and a
+configurable light fade. It is recommended to use this with older hardware and a
+light limit closer to 8. Because of its wide range of compatibility it is set as
+the default.
 
 'shaders' carries all of the benefits that 'shaders compatibility' does, but
 uses a modern approach that allows for a higher :ref:`max lights` count with
@@ -174,9 +174,9 @@ this mode when supported and where the GPU is not a bottleneck. On some weaker
 devices, using this mode along with :ref:`force per pixel lighting` can carry
 performance penalties.
 
-Note that when enabled, groundcover lighting is forced to be vertex lighting,
+Note that when enabled groundcover lighting is forced to be vertex lighting,
 unless normal maps are provided. This is due to some groundcover mods using the
-Z-Up Normals technique to avoid some common issues with shading. As a
+Z-Up normals technique to avoid some common issues with shading. As a
 consequence, per pixel lighting would give undesirable results.
 
 This setting has no effect if :ref:`force shaders` is 'false'.

files/settings-default.cfg

@@ -451,11 +451,11 @@ radial fog = false
 # 'force per pixel lighting' is enabled.
 lighting method = shaders compatibility
 
-# Sets the bounding sphere multiplier of light sources, which are used to
-# determine if an object should receive lighting. Higher values will allow for
-# smoother transitions of light sources, but may carry a performance cost and
-# requires a higher number of 'max lights' set. It is recommended to keep this
-# at 1.0 with 'legacy' lighting enabled.
+# Sets the bounding sphere multiplier of light sources if 'lighting method' is
+# not 'legacy'. These are used to determine if an object should receive
+# lighting. Higher values will allow for smoother transitions of light sources,
+# but may carry a performance cost and requires a higher number of 'max lights'
+# set.
 light bounds multiplier =  1.75
 
 # The distance from the camera at which lights fade away completely.
@@ -470,7 +470,7 @@ light fade start = 0.85
 max lights = 8
 
 # Sets minimum ambient brightness of interior cells. Levels below this threshold will have their
-# ambient values adjusted to balance the darker interiors. 
+# ambient values adjusted to balance the darker interiors.
 # When 'lighting method' is set to 'legacy', this setting will have no effect.
 minimum interior brightness = 0.1