Add specular strength shader parameter

apps/openmw/mwrender/objectpaging.cpp

@@ -359,6 +359,7 @@ namespace MWRender
             stateset->setAttribute(m);
             stateset->addUniform(new osg::Uniform("colorMode", 0));
             stateset->addUniform(new osg::Uniform("emissiveMult", 1.f));
+            stateset->addUniform(new osg::Uniform("specStrength", 1.f));
             node.setStateSet(stateset);
         }
     };

apps/openmw/mwrender/renderingmanager.cpp

@@ -500,6 +500,7 @@ namespace MWRender
         defaultMat->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4f(0.f, 0.f, 0.f, 0.f));
         sceneRoot->getOrCreateStateSet()->setAttribute(defaultMat);
         sceneRoot->getOrCreateStateSet()->addUniform(new osg::Uniform("emissiveMult", 1.f));
+        sceneRoot->getOrCreateStateSet()->addUniform(new osg::Uniform("specStrength", 1.f));
 
         mFog.reset(new FogManager());
 

components/nifosg/nifloader.cpp

@@ -1932,6 +1932,7 @@ namespace NifOsg
 
             int lightmode = 1;
             float emissiveMult = 1.f;
+            float specStrength = 1.f;
 
             for (const Nif::Property* property : properties)
             {
@@ -2081,6 +2082,8 @@ namespace NifOsg
             stateset->setAttributeAndModes(mat, osg::StateAttribute::ON);
             if (emissiveMult != 1.f)
                 stateset->addUniform(new osg::Uniform("emissiveMult", emissiveMult));
+            if (specStrength != 1.f)
+                stateset->addUniform(new osg::Uniform("specStrength", specStrength));
         }
 
     };

components/resource/scenemanager.cpp

@@ -524,6 +524,7 @@ namespace Resource
                 result.getNode()->accept(colladaAlphaTrickVisitor);
 
                 result.getNode()->getOrCreateStateSet()->addUniform(new osg::Uniform("emissiveMult", 1.f));
+                result.getNode()->getOrCreateStateSet()->addUniform(new osg::Uniform("specStrength", 1.f));
                 result.getNode()->getOrCreateStateSet()->addUniform(new osg::Uniform("envMapColor", osg::Vec4f(1,1,1,1)));
                 result.getNode()->getOrCreateStateSet()->addUniform(new osg::Uniform("useFalloff", false));
             }

files/shaders/nv_default_fragment.glsl

@@ -39,6 +39,7 @@ varying vec3 passNormal;
 #include "alpha.glsl"
 
 uniform float emissiveMult;
+uniform float specStrength;
 
 void main()
 {
@@ -80,7 +81,7 @@ void main()
     gl_FragData[0].xyz *= lighting;
 
     float shininess = gl_FrontMaterial.shininess;
-    vec3 matSpec = getSpecularColor().xyz;
+    vec3 matSpec = getSpecularColor().xyz * specStrength;
 #if @normalMap
     matSpec *= normalTex.a;
 #endif

files/shaders/objects_fragment.glsl

@@ -71,6 +71,7 @@ centroid varying vec3 shadowDiffuseLighting;
 #else
 uniform float emissiveMult;
 #endif
+uniform float specStrength;
 varying vec3 passViewPos;
 varying vec3 passNormal;
 
@@ -204,6 +205,7 @@ void main()
     vec3 matSpec = getSpecularColor().xyz;
 #endif
 
+    matSpec *= specStrength;
     if (matSpec != vec3(0.0))
     {
 #if (!@normalMap && !@parallax && !@forcePPL)