added Node::evaluate(parent)

git-svn-id: svn://anubis/fart/branches/scene-file-scripting@335 7f9b0f55-74a9-4bce-be96-3c2cd072584d

parser/nodes.h

@@ -47,6 +47,19 @@ class Node
             std::cerr << "Warning: Node::getNode() called!" << std::endl;
             return NULL;
         }
+        virtual void evaluate(refptr<Node> parent)
+        {
+            std::cerr << "Warning: Node::evaluate() called!" << std::endl;
+        }
+        virtual void evaluateChildren(refptr<Node> parent)
+        {
+            for (std::vector< refptr<Node> >::iterator it = m_children.begin();
+                 it != m_children.end();
+                 it++)
+            {
+                (*it)->evaluate(parent);
+            }
+        }
 
         virtual bool isShape() { return false; }
         virtual bool isMaterial() { return false; }