From - Tue Sep 9 15:20:34 2003 Return-Path: Received: from sunshine.math.utah.edu (sunshine.math.utah.edu [128.110.198.2]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h89DKPlL075531 for ; Tue, 9 Sep 2003 15:20:29 +0200 (CEST) Received: from psi.math.utah.edu (IDENT:am+6s2XXWEMjSJHNQs8nWhs7D9HZnTB8@psi.math.utah.edu [128.110.198.32]) by sunshine.math.utah.edu (8.9.3p2/8.9.3) with ESMTP id HAA22180; Tue, 9 Sep 2003 07:20:21 -0600 (MDT) Received: (from beebe@localhost) by psi.math.utah.edu (8.9.3p2/8.9.3) id HAA16671; Tue, 9 Sep 2003 07:20:21 -0600 (MDT) Date: Tue, 9 Sep 2003 07:20:21 -0600 (MDT) From: "Nelson H. F. Beebe" To: metafont@ens.fr Cc: beebe@math.utah.edu X-US-Mail: "Center for Scientific Computing, Department of Mathematics, 110 LCB, University of Utah, 155 S 1400 E RM 233, Salt Lake City, UT 84112-0090, USA" X-Telephone: +1 801 581 5254 X-FAX: +1 801 585 1640, +1 801 581 4148 X-URL: http://www.math.utah.edu/~beebe Subject: Fonts needed for minority scripts in the Script Encoding Initiative for Unicode Message-ID: Some readers of this list may be interested in looking at http://www.linguistics.berkeley.edu/~dwanders/ which describes the Script Encoding Initiative, which is working on creating support in Unicode for about 100 minority scripts. It seems to me that this is a case where some useful community service could be carried out by Metafont/Metapost experts in the design of fonts for some of these scripts. I suspect that the Script Encoding Initiative is busy with identifying exactly what glyphs are needed for the minority scripts, but may not have resources to generate fonts to display them. ------------------------------------------------------------------------------- - Nelson H. F. Beebe Tel: +1 801 581 5254 - - Center for Scientific Computing FAX: +1 801 581 4148 - - University of Utah Internet e-mail: beebe@math.utah.edu - - Department of Mathematics, 110 LCB beebe@acm.org beebe@computer.org - - 155 S 1400 E RM 233 - - Salt Lake City, UT 84112-0090, USA URL: http://www.math.utah.edu/~beebe - ------------------------------------------------------------------------------- From - Tue Sep 9 16:02:00 2003 Return-Path: Received: from mes1.mek.dtu.dk (mes1.mek.dtu.dk [130.226.16.6]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h89E1xlL089871 for ; Tue, 9 Sep 2003 16:01:59 +0200 (CEST) Received: from mek.dtu.dk ([130.226.18.82]) by mes1.mek.dtu.dk with Microsoft SMTPSVC(5.0.2195.6713); Tue, 9 Sep 2003 16:01:58 +0200 Message-ID: <3F5DDD56.40807@mek.dtu.dk> Date: Tue, 09 Sep 2003 16:01:58 +0200 From: Brian Elmegaard User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en MIME-Version: 1.0 To: MetaPost , Metafont mailing list Subject: Graph.mp annoyances Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 09 Sep 2003 14:01:58.0795 (UTC) FILETIME=[EF66DDB0:01C376DA] Hi all, I am using the metapost graph macro a lot, but it has a few minor annoyances. Maybe some of you have already solved the following problems: * The direction of arrowheads in gdrawarrow does not follow the curve it is on. * Reading data from a file only works if there is exactly one empty line between data for each curve and the error message is not helpful * Data with exponent as 1e4 cannot have a capital E. * Curves from data are always polygonal, unless one changes the true argument to GMcvi_ in Gdraw_. If this is set to false a very special kind of curve is created. Why does the branch for false have post- and precontrol of the curve, not just .. which makes a nice, smooth curve? * Axes can only be in the llft of the graph, not through the origin. * Frames can only be avoided if the internal variable Gneedfr_ is set to false. An empty argument to frame would be nice. I am very interested in any remedies to these issues. regards, -- Brian Elmegaard (be@mek.dtu.dk) Dept. of Mechanical Engineering, Energy Engineering, Technical University of Denmark, Phone +45 4525 4169 Fax +45 4593 5215 http://www.et.dtu.dk/staff/be From - Tue Sep 9 18:23:22 2003 Return-Path: Received: from smtp1.libero.it (smtp1.libero.it [193.70.192.51]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h89GNHlL037615 for ; Tue, 9 Sep 2003 18:23:17 +0200 (CEST) Received: from a3i3g5 (151.26.57.187) by smtp1.libero.it (7.0.019) id 3F58A1E00010ADA5 for metafont@ens.fr; Tue, 9 Sep 2003 18:23:46 +0200 From: "Rodolfo Medina" To: Subject: Problems running the file calu.mf Date: Tue, 9 Sep 2003 18:24:46 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Disposition-Notification-To: "Rodolfo Medina" Hi, everyone. I'm new to Metafont. From CTAN I downloaded a file called calu.mf, because I wanted to use a calligraphic font. On my PC I have Mandrake Linux 9.0. So: from the linux console I type mf Then, in response to **, I type \mode=localfont; input calu as explained in the Metafontbook on p.39. Then I get the following error message: (calu.mf >> cmchar ! Isolated expression. "Calligraphic A" l.10 cmchar "Calligraphic A" ; ? When I ask for help, it says: I couldn't find an `=' or `:=' after the expression that is shown above this error message, so I guess I'll just ignore it and carry on. I know it's something to do with the cm.base file, which I didn't manage to create in any way, although on my PC there is the file cmbase.mf. Please, could you tell me what I can do? But, since I'm really new to Metafont, I'd need to be explained every step one by one! Thanks in advance, Rodolfo --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.502 / Virus Database: 300 - Release Date: 18/07/03 From - Tue Sep 9 21:38:05 2003 Return-Path: Received: from mailhost.uark.edu (mail.uark.edu [130.184.5.66]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h89JbwlL000830 for ; Tue, 9 Sep 2003 21:37:59 +0200 (CEST) Received: from comp.uark.edu (comp.uark.edu [130.184.5.197]) by mailhost.uark.edu (iPlanet Messaging Server 5.2 HotFix 1.04 (built Oct 21 2002)) with ESMTP id <0HKY00GILP0EQP@mailhost.uark.edu> for metafont@ens.fr; Tue, 09 Sep 2003 14:33:50 -0500 (CDT) Date: Tue, 09 Sep 2003 14:33:50 -0500 (CDT) From: "Daniel H. Luecking" Subject: Re: [metafont] Graph.mp annoyances In-reply-to: <3F5DDD56.40807@mek.dtu.dk> To: MetaPost Cc: Metafont mailing list Message-id: MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Content-transfer-encoding: 7BIT References: <3F5DDD56.40807@mek.dtu.dk> On Tue, 9 Sep 2003, Brian Elmegaard wrote: > Hi all, > > I am using the metapost graph macro a lot, but it has a few minor > annoyances. Maybe some of you have already solved the following problems: > > * The direction of arrowheads in gdrawarrow does not follow the curve it > is on. This may be because the direction is undefined at corners of a path. MP usually uses (postcontrol - precontrol), which doesn't usually match either the in or the out direction. graph.mp uses instead (point - precontrol) as the direction, generally a better choice. However, if the path is rather curved near the head, it may seem to be incorrect, with the edge of the head closer to the path on the inside of the curve. Still, the head does point in the direction of the tangent at the endpoint of the curve. It is really quite difficult to algorithmically choose an arrowhead. (I know, I've tried.) The best looking results can be achieved by putting the *base* of the arrowhead (rather than the tip) at the path's endpoint. But most people don't want to allow that. > > * Reading data from a file only works if there is exactly one empty line > between data for each curve and the error message is not helpful All graphing programs I know of require a particular format for the data file. Some give no error and simply stop at a double blank line. One simply has to know the rquirements for input. > > * Data with exponent as 1e4 cannot have a capital E. > > * Curves from data are always polygonal, unless one changes the true > argument to GMcvi_ in Gdraw_. If this is set to false a very special > kind of curve is created. Why does the branch for false have post- and > precontrol of the curve, not just .. which makes a nice, smooth curve? Because ".." will often not make a *nice* smooth curve. Without selecting the controls, such a connection will often make S-shapes in the graph (where the curve turns in the negative horizontal direction briefly) if the data varies rapidly. In such cases the graph should not be too smooth. Admittedly, I don't know how graph.mp chooses controls, nor whether there might be better choices, but for general purposes, some choice is unavoidable. Regards, -- Dan Luecking Dept. of Mathematical Sciences luecking@uark.edu University of Arkansas http://comp.uark.edu/~luecking/ Fayetteville, AR 72101 From - Tue Sep 9 23:25:53 2003 Return-Path: Received: from smtp0.libero.it (smtp0.libero.it [193.70.192.33]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h89LPXlL031533 for ; Tue, 9 Sep 2003 23:25:33 +0200 (CEST) Received: from a3i3g5 (151.26.54.81) by smtp0.libero.it (7.0.019) id 3F589BB70011F921 for metafont@ens.fr; Tue, 9 Sep 2003 23:25:32 +0200 From: "Rodolfo Medina" To: Subject: Re: [metafont] Problems running the file calu.mf Date: Tue, 9 Sep 2003 23:27:06 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Disposition-Notification-To: "Rodolfo Medina" To Mr Christophe Grandsire: Thank you for your kind reply. >Now, a second problem is that calu.mf belongs to the driver files necessary >to create the Computer Modern fonts families. As such, it is optimised to >create calligraphic letters to use in math environments only. You cannot >use it to create a normal calligraphic font. To use calligraphic letters in math environments only is exactly what I meant to do! As far as you know, are there any parameter files which call calu.mf and can be used? Or, if there aren't, maybe one could think of creating one himself? Would it be difficult? You see, now I'd be curious to see the end of the history. Besides, among all the .mf files for calligraphic letters that I found looking around (and they were a lot), there was just one that I was able to compile by Metafont, that is callig15.mf inputting calligra.mf. For all the others I got error messages. Cheers, Rodolfo --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.502 / Virus Database: 300 - Release Date: 18/07/03 From - Wed Sep 10 08:31:50 2003 Return-Path: Received: from mes1.mek.dtu.dk (mes1.mek.dtu.dk [130.226.16.6]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h8A6VnlL071978 for ; Wed, 10 Sep 2003 08:31:49 +0200 (CEST) Received: from mek.dtu.dk ([130.226.18.82]) by mes1.mek.dtu.dk with Microsoft SMTPSVC(5.0.2195.6713); Wed, 10 Sep 2003 08:31:49 +0200 Message-ID: <3F5EC554.6010907@mek.dtu.dk> Date: Wed, 10 Sep 2003 08:31:48 +0200 From: Brian Elmegaard User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Metafont mailing list , MetaPost Subject: Re: [Metapost] Re: [metafont] Graph.mp annoyances References: <3F5DDD56.40807@mek.dtu.dk> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 10 Sep 2003 06:31:49.0154 (UTC) FILETIME=[36D07820:01C37765] Daniel, I know from experience that the bezier curves very different from what was expected. And, generally I would not want to have make a curved graph from a set of data points. However, if I would like to plot the sine-function, it would be easier to have just a few points on it and still have a curve. One reason for asking was also, that there might be good reasons for the way it was written, so please explain. The following shows up as a polygonal curve in the .1 (and also shows a bad arrowhead): % -90 0 % -70 0.342 % -50 0.6428 % -30 0.866 % -10 0.9848 % 0 1 % 10 0.9848 % 30 0.866 % 50 0.6428 % 70 0.342 % 90 0 beginfig(1); draw begingraph(5cm,5cm); gdraw "mpgraph.mp"; gdrawarrow (10,1)--(12,2); % BTW, this shows that even straigth line % arrowheads looks odd. endgraph; endfig; If instead I change the boolean argument to GMcvi_ in Gdraw_ to false: % Handle the part of a Gdraw command that uses path or data file p. def Gdraw_ expr p = if string p: GMcvi_(false) Mreadpath(p) % argument changed to false elseif path p or pair p: Gucvi_ p else: Gerr_(p,"gdraw argument should be a data file or a path") origin fi withpen currentpen Gwithlist_ _op_ enddef; I get a very (very, very IMHO) strange curve. If in addition, I change the ..controls line in Gscan_ by removing the controls it looks as expected: vardef Gscan_(expr p, c)(suffix tx, ty) = if (str tx="") and (str ty=""): p else: save r_; path r_; forever: Gdidsc_ := false; r_ := Gpp_(point 0 of p, tx, ty) if path p: for t=1 upto length p: if c: -- else: .. % looks better for a simple curve fi Gpp_(point t of p, tx, ty) endfor if cycle p: &cycle fi fi; exitunless Gdidsc_; endfor if pair p: point 0 of fi r_ fi enddef; regards, Brian Daniel H. Luecking wrote: > On Tue, 9 Sep 2003, Brian Elmegaard wrote: > > >>Hi all, >> >>I am using the metapost graph macro a lot, but it has a few minor >>annoyances. Maybe some of you have already solved the following problems: >> >>* The direction of arrowheads in gdrawarrow does not follow the curve it >>is on. > > > This may be because the direction is undefined at corners of a path. MP > usually uses (postcontrol - precontrol), which doesn't usually match > either the in or the out direction. graph.mp uses instead (point - > precontrol) as the direction, generally a better choice. However, if the > path is rather curved near the head, it may seem to be incorrect, with > the edge of the head closer to the path on the inside of the curve. > Still, the head does point in the direction of the tangent at the > endpoint of the curve. > > It is really quite difficult to algorithmically choose an arrowhead. > (I know, I've tried.) The best looking results can be achieved by > putting the *base* of the arrowhead (rather than the tip) at the path's > endpoint. But most people don't want to allow that. > > >>* Reading data from a file only works if there is exactly one empty line >>between data for each curve and the error message is not helpful > > > All graphing programs I know of require a particular format for the data > file. Some give no error and simply stop at a double blank line. One > simply has to know the rquirements for input. > > >>* Data with exponent as 1e4 cannot have a capital E. >> >>* Curves from data are always polygonal, unless one changes the true >>argument to GMcvi_ in Gdraw_. If this is set to false a very special >>kind of curve is created. Why does the branch for false have post- and >>precontrol of the curve, not just .. which makes a nice, smooth curve? > > > Because ".." will often not make a *nice* smooth curve. Without > selecting the controls, such a connection will often make S-shapes in > the graph (where the curve turns in the negative horizontal direction > briefly) if the data varies rapidly. In such cases the graph should not > be too smooth. Admittedly, I don't know how graph.mp chooses controls, > nor whether there might be better choices, but for general purposes, > some choice is unavoidable. > > Regards, > -- Brian Elmegaard (be@mek.dtu.dk) Dept. of Mechanical Engineering, Energy Engineering, Technical University of Denmark, Phone +45 4525 4169 Fax +45 4593 5215 http://www.et.dtu.dk/staff/be From - Wed Sep 10 22:28:19 2003 Return-Path: Received: from smtp2.libero.it (smtp2.libero.it [193.70.192.52]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h8AKSHlL090414 for ; Wed, 10 Sep 2003 22:28:17 +0200 (CEST) Received: from a3i3g5 (151.26.52.41) by smtp2.libero.it (7.0.019) id 3F58A2C3001608F7 for metafont@ens.fr; Wed, 10 Sep 2003 22:28:51 +0200 From: "Rodolfo Medina" To: Subject: Re: [metafont] Problems running the file calu.mf Date: Wed, 10 Sep 2003 22:29:19 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Disposition-Notification-To: "Rodolfo Medina" To Mr. Christophe Grandsire: Your messages taught me a lot, thanks for that. But now a question: maybe do you know and could you suggest a calligraphic font which is not as "rich" as callig*.mf and not as "essential" as cmsy*.mf? Cheers, Rodolfo M. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.502 / Virus Database: 300 - Release Date: 18/07/03 From - Thu Sep 11 17:39:42 2003 Return-Path: Received: from mailhost.uark.edu (mailhost.uark.edu [130.184.5.66]) by nef.ens.fr (8.12.9/1.01.28121999) with ESMTP id h8BFddlL066213 for ; Thu, 11 Sep 2003 17:39:39 +0200 (CEST) Received: from comp.uark.edu (comp.uark.edu [130.184.5.197]) by mailhost.uark.edu (iPlanet Messaging Server 5.2 HotFix 1.04 (built Oct 21 2002)) with ESMTP id <0HL2003TG33SMA@mailhost.uark.edu> for metafont@ens.fr; Thu, 11 Sep 2003 10:31:04 -0500 (CDT) Date: Thu, 11 Sep 2003 10:31:04 -0500 (CDT) From: "Daniel H. Luecking" Subject: Re: [Metapost] Re: [metafont] Graph.mp annoyances In-reply-to: <3F5EC554.6010907@mek.dtu.dk> To: Metafont mailing list Cc: MetaPost Message-id: MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Content-transfer-encoding: 7BIT References: <3F5DDD56.40807@mek.dtu.dk> <3F5EC554.6010907@mek.dtu.dk> On Wed, 10 Sep 2003, Brian Elmegaard wrote: > Daniel, > > The following shows up as a polygonal curve in the .1 (and also shows a > bad arrowhead): > > gdrawarrow (10,1)--(12,2); % BTW, this shows that even straigth line > % arrowheads looks odd. > > I get a very (very, very IMHO) strange curve. I think both problems may be a bug. It would appear (and I'm partly guessing here) that the code is not accounting for the vastly different horizontal and vertical scales in your graph. The arrowhead appears on my screen to have a slope equal to 1/2, and the line above (at first glance) also apears to have the same slope. However, the line is nearly vertical because the horizontal scale and vertical scale differ by a factor of about 100. I guess I've never noticed this because I've never had much difference in scales. I would guess the choice of controls in the "false" case is similarly affected by the different scales. I'll look into it further when I have time. But perhaps some expert could suggest a fix. Dan P.S. Please don't return a full quote in your replies. -- Dan Luecking Dept. of Mathematical Sciences luecking@uark.edu University of Arkansas http://comp.uark.edu/~luecking/ Fayetteville, AR 72101 From - Thu Sep 18 11:37:41 2003 Return-Path: Received: from aria.schoolnet.ir (aria.schoolnet.ir [81.31.175.2]) by nef.ens.fr (8.12.10/1.01.28121999) with ESMTP id h8I9bZmj023702 for ; Thu, 18 Sep 2003 11:37:36 +0200 (CEST) Received: from aria.schoolnet.ir (localhost.localdomain [127.0.0.1]) by aria.schoolnet.ir (8.12.8/8.12.8) with ESMTP id h8I9eDvR032243; Thu, 18 Sep 2003 14:10:13 +0430 Received: from localhost (ziari@localhost) by aria.schoolnet.ir (8.12.8/8.12.8/Submit) with ESMTP id h8I9e7t5032238; Thu, 18 Sep 2003 14:10:10 +0430 Date: Thu, 18 Sep 2003 14:10:07 +0430 (IRST) From: Jafar Ziari To: metafont@ens.fr, Subject: Chemistry's Figures Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-MailScanner-Information: Please contact the ISP for more information X-MailScanner: Found to be clean Dear Friends, I hope that you are fine, I need many chemistry's figures (that drawn by metapost), Would you send me these samples please (or introduce me link of this samples) With Reghards, Jafar Ziari From - Sun Sep 21 17:09:43 2003 Return-Path: Received: from smtp-50v.tesionmail.de (smtp-50v.tesionmail.de [213.182.133.15]) by nef.ens.fr (8.12.10/1.01.28121999) with ESMTP id h8LF9fv1003554 for ; Sun, 21 Sep 2003 17:09:41 +0200 (CEST) Received: from homer.bertram-scharpf ([195.226.103.44]) by smtp-50v.tesionmail.de (Netscape Messaging Server 4.15) with ESMTP id HLKKS400.FV9 for ; Sun, 21 Sep 2003 15:09:40 +0000 Received: from berti by homer.bertram-scharpf with local (Exim 3.35 #1 (Debian)) id 1A15q2-00030M-00 for ; Sun, 21 Sep 2003 17:09:26 +0200 Date: Sun, 21 Sep 2003 17:09:26 +0200 From: Bertram Scharpf To: metafont@ens.fr Subject: Right Angle in logocomplet's K Message-ID: <20030921150926.GA20680@homer.bertram-scharpf> Mail-Followup-To: metafont@ens.fr Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.3.28i Sender: Bertram Scharpf Hi, through this list my attention was attracted onto the book 'METAFONT - Guide pratique' by Bernard Desgraupes. I bought it and I like it very much; thank you, Bernard! Now I have a question about the letter "K" of the font `logocomplet' described on p. 132. The angle z4z5z6 is defined to be 90°, but when I am measuring in the image on page 137, I find that the angle comes out to be 86°. Is the `solve'-algorithm that unexact or did I unterstand something wrong? Thanks in advance, Bertram -- Bertram Scharpf Stuttgart, Deutschland/Germany From - Sun Sep 21 17:40:00 2003 Return-Path: Received: from smarthost1.mail.easynet.fr (smarthost1.mail.easynet.fr [212.180.1.68]) by nef.ens.fr (8.12.10/1.01.28121999) with ESMTP id h8LFdwv1009342 for ; Sun, 21 Sep 2003 17:39:58 +0200 (CEST) Received: from [212.180.17.179] (helo=easyconnect.fr) by smarthost1.mail.easynet.fr with esmtp (Exim 3.35 #1 (Debian)) id 1A16Ja-0000QN-00; Sun, 21 Sep 2003 17:39:58 +0200 Message-ID: <3F6DC64D.9060306@easyconnect.fr> Date: Sun, 21 Sep 2003 17:39:57 +0200 From: Bernard Desgraupes User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Bertram Scharpf CC: metafont@ens.fr Subject: Re: [metafont] Right Angle in logocomplet's K References: <20030921150926.GA20680@homer.bertram-scharpf> In-Reply-To: <20030921150926.GA20680@homer.bertram-scharpf> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Bertram, did you try to set "tolerance" to a smaller value to get a more accurate solution. It is explained on page 104. You could set: tolerance := 0.05; The default value is 0.1. I probably should have done it myself in the code for letter K. It might also be that the Postscript representation is not 100% acurate either. Cheers Bernard >Hi, > >through this list my attention was attracted onto >the book 'METAFONT - Guide pratique' by Bernard >Desgraupes. I bought it and I like it very much; >thank you, Bernard! > >Now I have a question about the letter "K" of >the font `logocomplet' described on p. 132. > >The angle z4z5z6 is defined to be 90°, but >when I am measuring in the image on page 137, >I find that the angle comes out to be 86°. > >Is the `solve'-algorithm that unexact or >did I unterstand something wrong? > >Thanks in advance, > >Bertram > > > From - Fri Sep 26 11:20:48 2003 Return-Path: Received: from web40601.mail.yahoo.com (web40601.mail.yahoo.com [66.218.78.138]) by nef.ens.fr (8.12.10/1.01.28121999) with SMTP id h8Q9Kiv1092019 for ; Fri, 26 Sep 2003 11:20:45 +0200 (CEST) Message-ID: <20030926092044.79911.qmail@web40601.mail.yahoo.com> Received: from [62.44.96.2] by web40601.mail.yahoo.com via HTTP; Fri, 26 Sep 2003 02:20:44 PDT Date: Fri, 26 Sep 2003 02:20:44 -0700 (PDT) From: Ivan Ivanov Subject: MetaPost variables used as labels To: metafont@ens.fr, metapost@ntg.nl In-Reply-To: <3F5EC554.6010907@mek.dtu.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Dear colleagues, I have the following question concerning MetaPost. If I have a numeric variable defined in a MetaPost file is it possible to use its value as a label? For examle: n := 5; pair p; p := (100,100); label(value_of_n, p); or more complex: n := 5; pair p[]; for i=0 upto n-1: p[i] := (i+1)*(100,100); label(value_of_i, p[i]); endfor; I am interesting in it because some of my labels follow some rules that can be described in a for clause and this will save me the manual labeling of each point (I had about 50 labels in my last figure). I read carefully "Integrating Text and Graphics" from John Hobby's manual and other docs too, but didn't fnd it. I will appreciate any help. Regards Ivan Ivanov Department of Mathematcis and Computer Science Sofia University __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com From - Fri Sep 26 13:32:43 2003 Return-Path: Received: from mwinf0503.wanadoo.fr (smtp4.wanadoo.fr [193.252.22.26]) by nef.ens.fr (8.12.10/1.01.28121999) with ESMTP id h8QBWfv1019847 for ; Fri, 26 Sep 2003 13:32:41 +0200 (CEST) Received: from oemcomputer (ABrest-103-1-2-113.w217-128.abo.wanadoo.fr [217.128.51.113]) by mwinf0503.wanadoo.fr (SMTP Server) with SMTP id 925576800121; Fri, 26 Sep 2003 13:32:40 +0200 (CEST) Message-ID: <001b01c38421$efe42780$713380d9@oemcomputer> From: "pth" To: "Ivan Ivanov" , , References: <20030926092044.79911.qmail@web40601.mail.yahoo.com> Subject: Re: [metafont] MetaPost variables used as labels Date: Fri, 26 Sep 2003 13:32:54 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 ----- Original Message ----- From: "Ivan Ivanov" To: ; Sent: Friday, September 26, 2003 11:20 AM Subject: [metafont] MetaPost variables used as labels > Dear colleagues, > > I have the following question concerning MetaPost. If > I have a numeric variable defined in a MetaPost file > is it possible to use its value as a label? For > examle: > n := 5; > pair p; > p := (100,100); > label(value_of_n, p); > > or more complex: > n := 5; > pair p[]; > for i=0 upto n-1: > p[i] := (i+1)*(100,100); > label(value_of_i, p[i]); > endfor; > n := 5; pair p[]; for i=0 upto n-1: p[i] := (i+1)*(100,100); write "label(btex $"&decimal(i)&"$ etex,("&decimal(xpart(p[i]))&","&decimal(ypart(p[i]))&"));" to "mptextmp.mp"; endfor write EOF to "mptextmp.mp"; scantokens "input mptextmp"; pth From - Fri Sep 26 13:52:49 2003 Return-Path: Received: from web40610.mail.yahoo.com (web40610.mail.yahoo.com [66.218.78.147]) by nef.ens.fr (8.12.10/1.01.28121999) with SMTP id h8QBqhv1023545 for ; Fri, 26 Sep 2003 13:52:43 +0200 (CEST) Message-ID: <20030926115242.21540.qmail@web40610.mail.yahoo.com> Received: from [62.44.96.2] by web40610.mail.yahoo.com via HTTP; Fri, 26 Sep 2003 04:52:42 PDT Date: Fri, 26 Sep 2003 04:52:42 -0700 (PDT) From: Ivan Ivanov Subject: Re: [metafont] MetaPost variables used as labels To: metafont@ens.fr In-Reply-To: <001b01c38421$efe42780$713380d9@oemcomputer> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Thank you it works. I understand from your examples what write and scantokens commands do but where one can get more information about them and the other "hidden features" of MetaPost? Greetings Ivan --- pth wrote: > > ----- Original Message ----- > From: "Ivan Ivanov" > To: ; > Sent: Friday, September 26, 2003 11:20 AM > Subject: [metafont] MetaPost variables used as > labels > > > n := 5; > pair p[]; > for i=0 upto n-1: > p[i] := (i+1)*(100,100); > write "label(btex $"&decimal(i)&"$ > etex,("&decimal(xpart(p[i]))&","&decimal(ypart(p[i]))&"));" > to "mptextmp.mp"; > endfor > write EOF to "mptextmp.mp"; > scantokens "input mptextmp"; > > > pth > __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com From - Mon Sep 29 20:18:32 2003 Return-Path: Received: from web40607.mail.yahoo.com (web40607.mail.yahoo.com [66.218.78.144]) by nef.ens.fr (8.12.10/1.01.28121999) with SMTP id h8TIIRjw004786 for ; Mon, 29 Sep 2003 20:18:27 +0200 (CEST) Message-ID: <20030929181826.59428.qmail@web40607.mail.yahoo.com> Received: from [62.44.96.2] by web40607.mail.yahoo.com via HTTP; Mon, 29 Sep 2003 11:18:26 PDT Date: Mon, 29 Sep 2003 11:18:26 -0700 (PDT) From: Ivan Ivanov Subject: Graphics of functions To: metafont@ens.fr, metapost@ntg.nl In-Reply-To: <001b01c38421$efe42780$713380d9@oemcomputer> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Dear List, please help me with what troubles my mind now. I have some functions given analytically like f(x)=x^3-x+1 or f(x)=-(x+1)*exp(x-1) and I want to draw their graphics using MetaPost. Upto to now I found two ways but they are not comfortable for my needs. The first one is the obvious: pair p[]; numeric i; i:=0; for x := a step .01 until b: numeric y; % y := f(x); y := x*x*x-x+1; p[i] := (x*1cm, y*1cm); i := i+1; endfor; for j := 1 upto i; draw p[j-1]..p[j]; endfor; and the second one was to calculate again some values of f(x), write them in file f.d and use this file in this way: draw begingraph(10cm,10cm); gdraw("f.d"); endgraph; Both ways proved to be tedious since I want later to decorate the graphics by contouring parts of the graphics with thicker lines or adding labels to specific points (for example where it crosses the axes). The problem with the labels is that I had to recalculate again the index j of the needed point p[j] so i cannot use intersectionpoint. Furthermore, I am trying to contour a part of the graphics between point p[k] and point p[l] in this way:for t=k+1 upto l: draw ((p[t-1]..p[t]) shifted (0,.2cm)) withcolor red withpen pencircle scaled .2cm endfor; As a result there are some large gaps between the very graphics and the coloured graphics. I fixed some of these misbehaviours manually but it was now easy. These are my pains with my functions. Thank you very much in advance. Kind Regards Ivan Ivanov P.S. I am doing such things because I am preparing some lecture notes in Math Analysis. So I hope someone managed to do it with MetaPost __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com From - Mon Sep 29 21:22:49 2003 Return-Path: Received: from ares.md.kth.se (ares.md.kth.se [130.237.57.10]) by nef.ens.fr (8.12.10/1.01.28121999) with ESMTP id h8TJMkjw028867 for ; Mon, 29 Sep 2003 21:22:47 +0200 (CEST) Received: from localhost (radien.md.kth.se [130.237.57.166]) by localhost.md.kth.se (Postfix) with ESMTP id 9A1FDA7995; Mon, 29 Sep 2003 21:22:45 +0200 (CEST) Received: from ares.md.kth.se ([130.237.57.10]) by localhost (radien.md.kth.se [130.237.57.166]) (amavisd-new, port 10027) with ESMTP id 29124-08; Mon, 29 Sep 2003 21:22:44 +0200 (CEST) Received: from ares.md.kth.se (radien.md.kth.se [130.237.57.166]) by localhost.md.kth.se (Postfix) with ESMTP id 3278CA79A8; Mon, 29 Sep 2003 21:22:45 +0200 (CEST) Received: from dragon.md.kth.se (dragon.md.kth.se [130.237.59.245]) by ares.md.kth.se (Postfix) with ESMTP id ED8AEA7995; Mon, 29 Sep 2003 21:22:44 +0200 (CEST) Date: Mon, 29 Sep 2003 21:22:44 +0200 (CEST) From: Johan Ingvast To: Ivan Ivanov Cc: Metafont list Subject: Re: [Metapost] Graphics of functions In-Reply-To: <20030929181826.59428.qmail@web40607.mail.yahoo.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Hi I hope I understand your problem right, Would it help if you got the function you want to draw in one path? Then you can do it as follows. (maybe a bit more complicated than needed, but on the other hand pretty general) % Define the functions you want to plot % Function one vardef H(expr x) = x*x*x-x+1 enddef; % Function two vardef F(expr x) = -(x+1)*mexp((x-1)*256) enddef; % This function returns a path generated by some function vardef makePath(suffix F)(expr xstart,xstep,xend) = save x; for x = xstart step xstep until (xend-xstep): (x,F(x)) .. endfor (xend,F(xend)) enddef; beginfig(1); path p; p:=makePath(H,0,0.1,1); % Generate the path from fuction H draw p scaled 5cm; draw p scaled 5cm shifted (0.2cm*right) withcolor red; endfig; beginfig(2); path p; p:=makePath(F,0,0.1,1); % Generate the path from fuction F draw p scaled 5cm; draw p scaled 5cm shifted (0.2cm*right) withcolor red; endfig; Hope this can help you /johan On Mon, 29 Sep 2003, Ivan Ivanov wrote: > Dear List, > please help me with what troubles my mind now. I have > some functions given analytically like f(x)=x^3-x+1 or > f(x)=-(x+1)*exp(x-1) and I want to draw their graphics > using MetaPost. Upto to now I found two ways but they > are not comfortable for my needs. The first one is the > obvious: > pair p[]; > numeric i; > i:=0; > for x := a step .01 until b: > numeric y; > % y := f(x); > y := x*x*x-x+1; > p[i] := (x*1cm, y*1cm); > i := i+1; > endfor; > for j := 1 upto i; > draw p[j-1]..p[j]; > endfor; > > and the second one was to calculate again some values > of f(x), write them in file f.d and use this file in > this way: > draw begingraph(10cm,10cm); > gdraw("f.d"); > endgraph; > > Both ways proved to be tedious since I want later to > decorate the graphics by contouring parts of the > graphics with thicker lines or adding labels to > specific points (for example where it crosses the > axes). The problem with the labels is that I had to > recalculate again the index j of the needed point p[j] > so i cannot use intersectionpoint. > Furthermore, I am trying to contour a part of the > graphics between point p[k] and point p[l] in this > way:for t=k+1 upto l: > draw ((p[t-1]..p[t]) shifted (0,.2cm)) withcolor red > withpen pencircle scaled .2cm > endfor; > As a result there are some large gaps between the very > graphics and the coloured graphics. I fixed some of > these misbehaviours manually but it was now easy. > > These are my pains with my functions. Thank you very > much in advance. > Kind Regards > Ivan Ivanov > > P.S. I am doing such things because I am preparing > some lecture notes in Math Analysis. So I hope someone > managed to do it with MetaPost > > __________________________________ > Do you Yahoo!? > The New Yahoo! Shopping - with improved product search > http://shopping.yahoo.com > _______________________________________________ > Metapost mailing list > Metapost@ntg.nl > http://www.ntg.nl/mailman/listinfo/metapost > -- Johan Ingvast, PhD student http://www.md.kth.se/~ingvast Department of Machine Design, Royal Institute of Technology, Sweden http://www.md.kth.se, http://www.md.kth.se/~cas <--- Walking robot proj tel +46 (0)8 790 95 36 mob. +46 (0)70 34 34 498 From - Tue Sep 30 00:11:24 2003 Return-Path: Received: from web40608.mail.yahoo.com (web40608.mail.yahoo.com [66.218.78.145]) by nef.ens.fr (8.12.10/1.01.28121999) with SMTP id h8TMBHjw075214 for ; Tue, 30 Sep 2003 00:11:18 +0200 (CEST) Message-ID: <20030929221115.87336.qmail@web40608.mail.yahoo.com> Received: from [62.44.96.2] by web40608.mail.yahoo.com via HTTP; Mon, 29 Sep 2003 15:11:15 PDT Date: Mon, 29 Sep 2003 15:11:15 -0700 (PDT) From: Ivan Ivanov Subject: Re: [Metapost] Graphics of functions To: metafont@ens.fr, metapost@ntg.nl In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Johan, Thank you very much for your response. I added my remarks in your letter below. --- Johan Ingvast wrote: > Hi > I hope I understand your problem right, Yes, perfectly right. > Would it help if you got the function you want to > draw in one path? > Then you can do it as follows. (maybe a bit more > complicated than > needed, but on the other hand pretty general) I really need this generality. > beginfig(1); > path p; > p:=makePath(H,0,0.1,1); % Generate the path > from fuction H > draw p scaled 5cm; > draw p scaled 5cm shifted (0.2cm*right) > withcolor red; > endfig; If I modify your example as follows: beginfig(2); path p; p:=makePath(F,0,0.1,1); % Generate the path from fuction F draw p scaled 5cm; draw p scaled 5cm shifted (0.2cm*right) withcolor red withpen pencircle scaled .2cm; endfig;, I receieve a white gap between red thick graphics and the real fraphics of F and the gap is at the point of local minimum. This was what I wanted to overcome. So I did the following: beginfig(2); path p; p:=makePath(H,0,0.1,1); % Generate the path from fuction H draw p scaled 5cm; draw p scaled 5cm shifted (0.2cm*down) withcolor red; save cyc, a, b; path cyc; path a, b; a := (0,H(0)) scaled 5cm -- (0,H(0)) scaled 5cm shifted (0.2cm*down); b := (1,H(1)) scaled 5cm -- (1,H(1)) scaled 5cm shifted (0.2cm*down); cyc := buildcycle(p scaled 5cm, a, p scaled 5cm shifted (0.2cm*down), b); fill cyc withcolor red; draw p scaled 5cm; endfig; Thus I can avoid the gap. > Hope this can help you Thank you very much for your help. It really help me to find the correct answer Best Wished Ivan __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com