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

main/Scene-load.cc

@@ -13,8 +13,8 @@ typedef vector< refptr<Node> >::const_iterator Node_Iterator;
 void Scene::load(const char * filename)
 {
     /* TODO: parse file somehow */
-//    refptr<Node> node = parse(filename);
-//    processNode(node);
+    refptr<Node> node = parse(filename);
+    processNode(node);
 
     Transform transform;
 
@@ -122,23 +122,40 @@ void Scene::processNode(refptr<Node> node)
     {
         processChildren(node);
     }
-    else if ( typeid(*node) == typeid(BoxNode) )
+}
+
+refptr<Shape> Scene::processShape(refptr<Node> node)
+{
+    if      ( typeid(*node) == typeid(BoxNode) )
     {
-        cout << "saw a box" << endl;
-    }
-    else if ( typeid(*node) == typeid(MaterialNode) )
-    {
-        refptr<Material> mat = processMaterial(node);
+        return processBox(node);
     }
     else if ( typeid(*node) == typeid(PlaneNode) )
     {
-        cout << "saw a plane" << endl;
+        return processPlane(node);
     }
     else if ( typeid(*node) == typeid(SphereNode) )
     {
-        cout << "saw a sphere" << endl;
+        return processSphere(node);
+    }
+    else if ( typeid(*node) == typeid(CylNode) )
+    {
+        return processCyl(node);
+    }
+    else if ( typeid(*node) == typeid(IntersectNode) )
+    {
+        return processBool(node);
+    }
+    else if ( typeid(*node) == typeid(UnionNode) )
+    {
+        return processBool(node);
+    }
+    else if ( typeid(*node) == typeid(SubtractNode) )
+    {
+        return processBool(node);
     }
 
+    return refptr<Shape>(NULL);
 }
 
 void Scene::processChildren(refptr<Node> node)
@@ -332,6 +349,76 @@ refptr<Shape> Scene::processSphere(refptr<Node> node)
     return sphere;
 }
 
+refptr<Shape> Scene::processBool(refptr<Node> node)
+{
+    refptr<Shape> shape1, shape2;
+    refptr<Material> material;
+    int shapes_seen = 0;
+
+    bool restore_transform = processTransforms(node);
+
+    for (Node_Iterator it = node->getChildren().begin();
+         it != node->getChildren().end();
+         it++)
+    {
+        if ( node->isShape() )
+        {
+            switch (shapes_seen)
+            {
+                case 0: shape1 = processShape(node);
+                        break;
+                case 1: shape2 = processShape(node);
+                        break;
+            }
+            shapes_seen++;
+        }
+        else if ( typeid(**it) == typeid(MaterialNode) )
+        {
+            material = processMaterial(*it);
+        }
+    }
+
+    if (shapes_seen < 2 || shape1.isNull() || shape2.isNull())
+    {
+        if (shapes_seen < 2)
+            cerr << __FILE__ << ": " << __LINE__
+                 << ": error: only saw "
+                 << shapes_seen
+                 << " child shapes!"
+                 << endl;
+        if (shape1.isNull())
+            cerr << __FILE__ << ": " << __LINE__
+                 << ": error: shape1 is null!" << endl;
+        if (shape2.isNull())
+            cerr << __FILE__ << ": " << __LINE__
+                 << ": error: shape2 is null!" << endl;
+        exit(3);
+    }
+
+    refptr<Shape> shape;
+    if      ( typeid(*node) == typeid(IntersectNode) )
+        shape = new Intersect(shape1, shape2);
+    else if ( typeid(*node) == typeid(UnionNode) )
+        shape = new Union(shape1, shape2);
+    else if ( typeid(*node) == typeid(SubtractNode) )
+        shape = new Subtract(shape1, shape2);
+    else
+    {
+        cerr << __FILE__ << ": " << __LINE__
+             << ": error: bool object unrecognized" << endl;
+        exit(3);
+    }
+
+    if ( ! material.isNull() )
+        shape->setMaterial(material);
+    shape->setTransform(m_transforms.top());
+    
+    if (restore_transform)
+        m_transforms.pop();
+
+    return shape;
+}
+
 bool Scene::processTransforms(refptr<Node> node)
 {
     bool did_any = false;

main/Scene.h

@@ -64,6 +64,8 @@ class Scene
         refptr<Light> processLight(refptr<Node> node);
         refptr<Shape> processPlane(refptr<Node> node);
         refptr<Shape> processSphere(refptr<Node> node);
+        refptr<Shape> processShape(refptr<Node> node);
+        refptr<Shape> processBool(refptr<Node> node);
         bool processTransforms(refptr<Node> node);
 
         /* rendering parameters */