worked on 3D walls

geo/Polygon2.h

@@ -18,6 +18,10 @@ public:
 		pts.push_back(p);
 	}
 
+	void add(std::initializer_list<Point2> lst) {
+		for (const Point2 p : lst) {add(p);}
+	}
+
 	std::vector<Point2>::iterator begin() {return pts.begin();}
 	std::vector<Point2>::iterator end() {return pts.end();}