anchor.diff:  ;;;  GB = Gilbert Baumann <unk6@rz.uni-karlsruhe.de>
   ;;;  AR = Arnaud Rouanet <rouanet@emi.u-bordeaux.fr>
   
  -;;; ---- TODO ----------------------------------------------------------------------------
  +;;; ---- TODO ------------------------------------------------------------------
   
   ;; - ellipses: The intersection of two ellipses is there, but
   ;;   handling the start/end angle is not implemented.
  
positive.code: (defgeneric region-intersection (region1 region2))
  (defgeneric region-difference (region1 region2))
  
  ;;; ---- 2.5.2 CLIM Point Objects --------------------------------------------------------
  
  (defclass standard-point (point)
    ((x :type coordinate :initarg :x)
  
negative.code: ;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: CLIM-INTERNALS; -*-
  ;;; ----------------------------------------------------------------------------
  ;;;     Title: The CLIM Region Datatype
  ;;;   Created: 1998-12-02 19:26
  ;;;    Author: Gilbert Baumann <unk6@rz.uni-karlsruhe.de>
  ;;;   License: LGPL (See file COPYING for details).
  ;;;       $Id: regions.lisp,v 1.39 2009/06/03 20:33:16 ahefner Exp $
  ;;; ----------------------------------------------------------------------------
  ;;;  (c) copyright 1998,1999,2001 by Gilbert Baumann
  ;;;  (c) copyright 2001 by Arnaud Rouanet (rouanet@emi.u-bordeaux.fr)
  
  