Preliminary material lookup hooks - still unoptimized.

simgear/scene/material/matlib.cxx

@@ -538,3 +538,36 @@ void SGMaterialLib::load_next_deferred() {
 	  return;
     }
 }
+
+bool SGMaterialLib::find( ssgSimpleState *state, string & material ) const
+{
+    bool found = false;
+    ssgSimpleState *state_mat;
+
+    material = "";
+
+    for( const_material_map_iterator iter = begin(); iter != end(); iter++ )
+    {
+	 int nb_tex = (*iter).second->get_num();
+
+	 // many textures per material
+	 for( int i = 0; i < nb_tex; i++ )
+	 {
+	     // material state
+	     state_mat = (*iter).second->get_state( i );
+
+	     if( state_mat == state )
+	     {
+                 material = (*iter).first.c_str();
+	         found = true;
+	     	 break;
+	     }
+	 }
+
+	 if( found )
+	     break;
+    }
+
+    return found;
+}
+

simgear/scene/material/matlib.hxx

@@ -87,6 +87,8 @@ public:
     material_map_iterator end() { return matlib.end(); }
     const_material_map_iterator end() const { return matlib.end(); }
 
+    bool find( ssgSimpleState*, string & material ) const;
+
     // Destructor
     ~SGMaterialLib ( void );
 };