Applied patch by samuncle to support disabling backface culling, thanks! (even though I helped quite a bit ;)

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@6735 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/material.cpp

@@ -63,6 +63,7 @@ Material::Material(const XMLNode *node, int index)
     node->get("max-speed",        &m_max_speed_fraction);
     node->get("slowdown-time",    &m_slowdown_time     );
     node->get("anisotropic",      &m_anisotropic       );
+    node->get("noculling",        &m_disable_cull      );
     node->get("backface-culling", &m_backface_culling  );
     std::string s("");
     node->get("graphical-effect", &s                   );
@@ -269,6 +270,7 @@ void  Material::setMaterialProperties(video::SMaterial *m) const
         m->SpecularColor = video::SColor(255, 255, 255, 255);
     }
     
+    // anisotropic
     if (m_anisotropic && UserConfigParams::m_anisotropic)
     {
         m->setFlag(video::EMF_ANISOTROPIC_FILTER, true);
@@ -278,6 +280,14 @@ void  Material::setMaterialProperties(video::SMaterial *m) const
         m->setFlag(video::EMF_TRILINEAR_FILTER, true);
     }
     
+    // noculling
+    if (m_disable_cull)
+    {
+        m->setFlag( irr::video::EMF_BACK_FACE_CULLING , false );
+    }
+
+    
+    
     if ( (m_clamp_tex & UCLAMP) != 0)
     {
         //  m->setFlag();

src/graphics/material.hpp

@@ -62,6 +62,9 @@ private:
     /** Whether to use anisotropic filtering for this texture */
     bool             m_anisotropic;
     
+    /** Disable the culling **/
+    bool             m_disable_cull;
+    
     /** True if lightmapping is enabled for this material. */
     bool             m_lightmap;
     float            m_friction;