1 files changed, 52 insertions, 0 deletions
diff --git a/src/visitor.h b/src/visitor.h
new file mode 100644
index 0000000..63f5d08
--- /dev/null
+++ b/src/visitor.h
@@ -0,0 +1,52 @@
+#ifndef VISITOR_H_
+#define VISITOR_H_
+
+#include "traverser.h"
+
+class Visitor
+{
+public:
+  Visitor() {}
+  virtual ~Visitor() {}
+  
+  virtual Response visit(class State &state, const class AbstractNode &node) = 0;
+  virtual Response visit(class State &state, const class AbstractIntersectionNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+  virtual Response visit(class State &state, const class AbstractPolyNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+  virtual Response visit(class State &state, const class CgaladvNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+  virtual Response visit(class State &state, const class CsgNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+  virtual Response visit(class State &state, const class DxfLinearExtrudeNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class DxfRotateExtrudeNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class ImportNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class PrimitiveNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class ProjectionNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class RenderNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+  virtual Response visit(class State &state, const class SurfaceNode &node) {
+		return visit(state, (const class AbstractPolyNode &)node);
+	}
+  virtual Response visit(class State &state, const class TransformNode &node) {
+		return visit(state, (const class AbstractNode &)node);
+	}
+	// Add visit() methods for new visitable subtypes of AbstractNode here
+};
+
+#endif