creating polygons for extrude objects, ngon takes radius parameter

git-svn-id: svn://anubis/fart/trunk@270 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/Scene-load.cc

@@ -1,4 +1,6 @@
 
+#include <math.h>
+
 #include <typeinfo>
 #include <iostream>
 
@@ -566,7 +568,23 @@ refptr<Shape> Scene::processExtrude(refptr<Node> node)
         }
         else if ( typeid(**it) == typeid(OffsetNode) )
         {
-            /* FIXME */
+            double distance = (*it)->getNumber();
+            Vector scale(1, 1, 1);
+            Vector position(0, 0, 0);
+            for (Node_Iterator it2 = (*it)->getChildren().begin();
+                 it2 != (*it)->getChildren().end();
+                 it2++)
+            {
+                if      ( typeid(**it2) == typeid(ScaleNode) )
+                {
+                    scale = * (*it2)->getVector();
+                }
+                else if ( typeid(**it2) == typeid(PositionNode) )
+                {
+                    position = * (*it2)->getVector();
+                }
+            }
+            extrude->addOffset(distance, scale, position);
         }
         else if ( (*it)->isMaterial() )
         {
@@ -587,14 +605,38 @@ refptr<Shape> Scene::processExtrude(refptr<Node> node)
 refptr<Polygon> Scene::processPolygon(refptr<Node> node)
 {
     refptr<Polygon> p = new Polygon();
-    /* FIXME */
+    for (Node_Iterator it = node->getChildren().begin();
+         it != node->getChildren().end();
+         it++)
+    {
+        if ( typeid(**it) == typeid(VectorNode) )
+        {
+            p->push_back((*it)->getVector());
+        }
+        else
+        {
+            cerr << "Error: Unknown polygon sub-object" << endl;
+            exit(3);
+        }
+    }
     return p;
 }
 
 refptr<Polygon> Scene::processNGon(refptr<Node> node)
 {
     refptr<Polygon> p = new Polygon();
-    /* FIXME */
+    double radius = node->getChildren()[0]->getNumber();
+    int n = node->getInteger();
+    if (n < 3)
+        n = 3;
+    double astep = 2.0 * M_PI / n;
+    for (int i = 0; i < n; i++)
+    {
+        p->push_back(new Vector(
+                    radius * cos(i * astep),
+                    radius * sin(i * astep),
+                    0.0));
+    }
     return p;
 }