filled out Scene::processBool() to handle all boolean shapes; added Node::isShape() virtual function to determine whether a node object represents a shape node

git-svn-id: svn://anubis/fart/trunk@167 7f9b0f55-74a9-4bce-be96-3c2cd072584d

parser/nodes.h

@@ -20,6 +20,7 @@ class Node
         {
             return refptr<Vector>(NULL);
         }
+        virtual bool isShape() { return false; }
 
     protected:
         std::vector< refptr<Node> > m_children;
@@ -66,6 +67,8 @@ class AmbientNode : public VectorNode
 
 class BoxNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class CameraNode : public Node
@@ -80,6 +83,8 @@ class ColorNode : public VectorNode
 
 class CylNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class DiffuseNode : public VectorNode
@@ -96,6 +101,8 @@ class HeightNode : public IntegerNode
 
 class IntersectNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class ItemsNode : public Node
@@ -126,6 +133,8 @@ class OptionsNode : public Node
 
 class PlaneNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class PlanePositionNode : public Node
@@ -199,10 +208,6 @@ class SceneNode : public Node
 {
 };
 
-class ShapeNode : public Node
-{
-};
-
 class ShininessNode : public NumberNode
 {
     public:
@@ -223,10 +228,14 @@ class SpecularNode : public VectorNode
 
 class SphereNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class SubtractNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class TranslateNode : public VectorNode
@@ -243,6 +252,8 @@ class TranslateBlockNode : public TranslateNode
 
 class UnionNode : public Node
 {
+    public:
+        bool isShape() { return true; }
 };
 
 class UpNode : public Node