Handle DoubleSided and TreeAnim flags in BSLightingShaderProperty.

apps/openmw/mwrender/renderingmanager.cpp

@@ -172,6 +172,7 @@ namespace MWRender
             stateset->addUniform(new osg::Uniform("isReflection", false));
             stateset->addUniform(new osg::Uniform("windSpeed", 0.0f));
             stateset->addUniform(new osg::Uniform("playerPos", osg::Vec3f(0.f, 0.f, 0.f)));
+            stateset->addUniform(new osg::Uniform("useTreeAnim", false));
         }
 
         void apply(osg::StateSet* stateset, osg::NodeVisitor* nv) override

components/nif/property.hpp

@@ -138,6 +138,9 @@ namespace Nif
         unsigned int type{ 0u }, flags1{ 0u }, flags2{ 0u };
         float envMapIntensity{ 0.f };
         void read(NIFStream* nif) override;
+
+        bool doubleSided() const { return (flags2 >> 4) & 1; }
+        bool treeAnim() const { return (flags2 >> 29) & 1; }
     };
 
     struct BSShaderLightingProperty : public BSShaderProperty

components/nifosg/nifloader.cpp

@@ -2150,6 +2150,8 @@ namespace NifOsg
                             textureSet, texprop->clamp, node->getName(), stateset, imageManager, boundTextures);
                     }
                     handleTextureControllers(texprop, composite, imageManager, stateset, animflags);
+                    if (texprop->doubleSided())
+                        stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
                     break;
                 }
                 case Nif::RC_BSShaderNoLightingProperty:
@@ -2190,6 +2192,8 @@ namespace NifOsg
                         stateset->addUniform(new osg::Uniform("useFalloff", false));
                     }
                     handleTextureControllers(texprop, composite, imageManager, stateset, animflags);
+                    if (texprop->doubleSided())
+                        stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
                     break;
                 }
                 case Nif::RC_BSLightingShaderProperty:
@@ -2203,6 +2207,10 @@ namespace NifOsg
                         handleTextureSet(texprop->mTextureSet.getPtr(), texprop->mClamp, node->getName(), stateset,
                             imageManager, boundTextures);
                     handleTextureControllers(texprop, composite, imageManager, stateset, animflags);
+                    if (texprop->doubleSided())
+                        stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
+                    if (texprop->treeAnim())
+                        stateset->addUniform(new osg::Uniform("useTreeAnim", true));
                     break;
                 }
                 case Nif::RC_BSEffectShaderProperty:
@@ -2253,6 +2261,8 @@ namespace NifOsg
                     stateset->addUniform(new osg::Uniform("useFalloff", false)); // Should use the shader flag
                     stateset->addUniform(new osg::Uniform("falloffParams", texprop->mFalloffParams));
                     handleTextureControllers(texprop, composite, imageManager, stateset, animflags);
+                    if (texprop->doubleSided())
+                        stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
                     break;
                 }
                 // unused by mw

files/shaders/compatibility/bs/default.frag

@@ -38,6 +38,7 @@ uniform float far;
 uniform float alphaRef;
 uniform float emissiveMult;
 uniform float specStrength;
+uniform bool useTreeAnim;
 
 #include "lib/light/lighting.glsl"
 #include "lib/material/alpha.glsl"
@@ -58,7 +59,8 @@ void main()
 #endif
 
     vec4 diffuseColor = getDiffuseColor();
-    gl_FragData[0].a *= diffuseColor.a;
+    if (!useTreeAnim)
+        gl_FragData[0].a *= diffuseColor.a;
     gl_FragData[0].a = alphaTest(gl_FragData[0].a, alphaRef);
 
 #if @normalMap