moved from ray3 to floorplan/3D

worked on new wall models
refactoring

geo/BBox3.h

@@ -57,6 +57,9 @@ public:
 	/** get the bbox's size */
 	const Point3 getSize() const {return p2-p1;}
 
+	/** get the boox's center */
+	const Point3 getCenter() const {return (p2+p1)/2;}
+
 	/** equal? */
 	bool operator == (const BBox3& o) const {
 		return	(p1.x == o.p1.x) &&