From - Wed Dec 12 13:16:41 2007 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.7 (2006-10-05) on di.ens.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.1.7 Received: from mail2.sun.ac.za (mail2.sun.ac.za [146.232.64.14]) by nef2.ens.fr (8.13.6/1.01.28121999) with ESMTP id lBCCGTw6045794 for ; Wed, 12 Dec 2007 13:16:35 +0100 (CET) X-Envelope-To: Received: from gawie.sun.ac.za ([146.232.144.33]) by mail2.sun.ac.za with esmtp (Exim 4.50) id 1J2PWT-0002Qc-Jp for metafont@ens.fr; Wed, 12 Dec 2007 13:13:05 +0200 Received: by gawie.sun.ac.za (Postfix, from userid 1000) id 5316B9B31; Wed, 12 Dec 2007 13:13:04 +0200 (SAST) Date: Wed, 12 Dec 2007 13:13:04 +0200 From: Dirk Laurie To: metafont@ens.fr Subject: NAPOLEON Message-ID: <20071212111304.GB14363@gawie.sun.ac.za> Mail-Followup-To: Dirk Laurie , metafont@ens.fr MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.13 (2006-08-11) X-Greylist: Delayed for 01:03:11 by milter-greylist-3.1.4 (nef2.ens.fr [129.199.96.32]); Wed, 12 Dec 2007 13:16:36 +0100 (CET) NAPOLEON is a MetaPost package for making geometry sketches given a typical mathematical description. For example, part of the NAPOLEON code for the mathematical text Circles $k_1$ and $k_2$ are drawn so that $k_2$ passes through the centre of $k_1.$ The circles cut each other in points $A$ and $B.$ A third circle $k_3$ touches $k_1$ in $C$ and $k_2$ in $D$ so that $k_1$ and $k_2$ are inside $k_3.$ $AB$ is extended to meet $k_3$ in $E$ and $F.$ The lines $DE$ and $DF$ cut $k_2$ respectively in $G$ and $H.$ is k3 = circumcircle (k1,k2,C); A = cut(k2,k1); B = cut(k1,k2); D = cut(k2,O2--O3); E = cut(k3,A--B); F = cut(k3,B--A); G = cut(k2,E--D); H = cut(k2,F--D); To find out more, download the README, documentation and source code from http://dip.sun.ac.za/~laurie/napoleon. Dirk Laurie