Scene-load.cc handling material definitions

git-svn-id: svn://anubis/fart/trunk@178 7f9b0f55-74a9-4bce-be96-3c2cd072584d

parser/nodes.h

@@ -22,6 +22,7 @@ class Node
             return refptr<Vector>(NULL);
         }
         virtual bool isShape() { return false; }
+        virtual bool isMaterial() { return false; }
         virtual std::string getString() { return ""; }
 
     protected:
@@ -135,6 +136,8 @@ class LookAtNode : public VectorNode
 
 class MaterialNode : public Node
 {
+    public:
+        bool isMaterial() { return true; }
 };
 
 class MaterialDefinitionNode : public IdentifierNode
@@ -147,6 +150,7 @@ class MaterialRefNode : public IdentifierNode
 {
     public:
         MaterialRefNode(const std::string & str) : IdentifierNode(str) {}
+        bool isMaterial() { return true; }
 };
 
 class MultisampleNode : public IntegerNode