[NTG-context] Re: MetaFun path joiners && and &&&& do not like single point paths
Hi Hans and Mikael, Thanks for your solutions. I’m happy to discard paths that have no area, so I used: q = for i = 1 upto 3 : if (length(p[i]) > 1): p[i] && fi endfor cycle ; This worked in the MWE, but it didn’t solve my problem in the globes module. Something else must be happening there. I’ll keep looking. Gavin ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: MetaFun path joiners && and &&&& do not like single point paths
On 12/31/2023 8:06 AM, Mikael Sundqvist wrote: \startMPpage path p[], q ; p1 = fullcircle scaled 3cm ; p2 = fullcircle scaled 2cm shifted (3cm,0) ; p3 = (3cm,2cm) ; p4 = fullcircle ; q = p[1] for i = 2 upto 3: if (length(p[i]) == 0): &&& else: && fi p[i] endfor && cycle ; eofill q withcolor 0.9 ; draw p1 withpen pencircle scaled 2pt withcolor .7 ; draw p2 withpen pencircle scaled 2pt withcolor .7 ; draw p3 withpen pencircle scaled 2pt withcolor .7 ; draw q withcolor red ; draw fullcircle scaled 6cm shifted (1.25cm,0) ; \stopMPpage maybe this is a bit more beautiful then q = for i = 1 upto 3 : if length(p[i]) == 0 : % todo: a fast nolength (p[i] -- p[i] shifted 5(eps,eps)) else: p[i] fi && endfor cycle ; (i'm not sure if we should change the implementation, probably not unless we have & -- actually we could have proper keywords which makes it less clumsy. Or 'recycle' that does the ugly eps job when we have a zero length path but we can move that over the year boundary.) Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl - ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: MetaFun path joiners && and &&&& do not like single point paths
Hi On Sun, Dec 31, 2023 at 3:33 AM Gavin via ntg-context wrote: > > Hi MetaFun fans, > > Following a suggestion of Hans, I experimented with && and &&& and for > joining paths in MetaFun. The joiner &&& produces one long path, but && and > seem to produce a disconnected path which includes all the original > paths. However, if one of the paths is a single point, then it connects it. > MWE below. > > I spotted this on my globes module, where we saw an extra line appear for a > very specific orientation of the globe. I guessed that this orientation had > an island right on the horizon, so that only one boundary point was visible, > creating a singe point path for that island. I should probably fix my module > so it doesn’t do that. However, it might be nice to have && and deal > with this situation gracefully. > > Gavin > > > \startMPpage > path p[], q ; > p1 = fullcircle scaled 3cm ; > p2 = fullcircle scaled 2cm shifted (3cm,0) ; > p3 = (3cm,2cm) ; > q = for i = 1 upto 3 : > p[i] && > endfor > cycle ; > draw p1 withpen pencircle scaled 2pt withcolor .7 ; > draw p2 withpen pencircle scaled 2pt withcolor .7 ; > draw p3 withpen pencircle scaled 2pt withcolor .7 ; > draw q withcolor red ; > eofill q withcolor 0.9 ; > draw fullcircle scaled 6cm shifted (1.25cm,0) ; > \stopMPpage Not beautiful, but this seems to do what you want in this particular case: \startMPpage path p[], q ; p1 = fullcircle scaled 3cm ; p2 = fullcircle scaled 2cm shifted (3cm,0) ; p3 = (3cm,2cm) ; p4 = fullcircle ; q = p[1] for i = 2 upto 3: if (length(p[i]) == 0): &&& else: && fi p[i] endfor && cycle ; eofill q withcolor 0.9 ; draw p1 withpen pencircle scaled 2pt withcolor .7 ; draw p2 withpen pencircle scaled 2pt withcolor .7 ; draw p3 withpen pencircle scaled 2pt withcolor .7 ; draw q withcolor red ; draw fullcircle scaled 6cm shifted (1.25cm,0) ; \stopMPpage This gives q = p1 && p2 &&& p3 && cycle ; /Mikael ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: metafun not working
luigi.scarso wrote: hmm, try on ctan: ctan/support/pstoedit/windows It should be an older (3.31) but good version . cited from the webpage: New or changed in 3.32: ... workaround to cope with a change introduced since ghostscript 7.04. Some new operators were added to ghostscript's internal array of operators without increasing the maximum size of the array. This led to the problem, that pstoedit couldn't add further operators. ... I tried it out before reading that paragraph and I can approve: unless you have an ancient GS, it doesn't work at all. 3.40 at least does something even though it crashes. Mojca ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun not working
Mojca Miklavec wrote: I tried it out before reading that paragraph and I can approve: unless you have an ancient GS, it doesn't work at all. 3.40 at least does something even though it crashes. but i have no problems here with gs 8.51 (all 8 versions worked ok) and pstoedit 3.33, so how recent is your gs? Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun not working
luigi.scarso wrote: Hans Hagen wrote: Mojca Miklavec wrote: I tried it out before reading that paragraph and I can approve: unless you have an ancient GS, it doesn't work at all. 3.40 at least does something even though it crashes. but i have no problems here with gs 8.51 (all 8 versions worked ok) and pstoedit 3.33, so how recent is your gs? Confirm : under linux MP.tex works with pstoedit 3.33 , gs 8.51 and even ESP Ghostscript 7.07; pstoedit 3.40 does not works correctly with gs 8.51 and 7.07 luigi I believe that the version 3.33 works, but I can't find it anywhere. Even 3.40 is difficult to download. Usually only some polite bandwidth exceeded message appears. I don't know if the development of the program is stil in progress, but they could switch to sourceforge. The version on CTAN is 3.31 - this is the one which doesn't work even for simple conversions outside ConTeXt. The paragraph I posted to the list was taken from New or changed in 3.32. This means that version 3.31 can't cope with the old GS. pstoedit 3.40 seems to work as well. I can make conversions from postscript to metapost outside ConTeXt without any problem. Also the posted example with metafun trickery works somehow. It crashes the pstoedit program, but obviously pstoedit manages to produce the proper output before crashing. I sent a short email to the email mentioned on the webpage - I hope they will answer. Mojca ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun not working
Mojca Miklavec wrote: I believe that the version 3.33 works, but I can't find it anywhere. i mailed you a copy yesterday (1 meg attachment) but you rmail agent may be to picky on zip files Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun manual
Jojo wrote: Would you plan to release a Chinese version? I am glad to be a volunteer translate for that. could be a challenge, remind me later (once the source code of the manual is stable translation should be no problem) Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun manual
+++ Hans Hagen [31/08/04 10:25 +0200]: Jojo wrote: Would you plan to release a Chinese version? I am glad to be a volunteer translate for that. could be a challenge, remind me later (once the source code of the manual is stable translation should be no problem) Best wishes! Waiting for good news! Rgds, Jojo 2004/09/01 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun manual
+++ Brooks Moses [30/08/04 12:37 -0700]: On Mon, Aug 30, 2004 at 09:21:29PM +0200, Floris van Manen wrote: I'm going to 'finish' the metafun manual, so if you have topics that need to be covered ... That's Great !! If you'd like volunteers to proofread the finished version, I'd be glad to help with that. Would you plan to release a Chinese version? I am glad to be a volunteer translate for that. My main request is the addition of an index, but I presume that was already on the to-do list. the topic as how to define and use user defined functions / macros / procedure could have some more explanation / samples. This might indeed be helpful, if the metafun manual is intended as a complete guide to both metapost and metafun (replacing the old metapost manual). My recollection is that the manual has very little (if any) on how to use suffix variables, and it would be nice to have a good overview of that somewhere other than the metafont (!) manual. also a suggested way as how to handle and use the definition of multiple (different) graphics within a single file could be helpful. e.g. where to put the graphics definitions. how to re-use pieces of graphics for other images (like axis frames). Agreed, although that's actually fairly simple (which is probably an argument _for_ including it, rather than against). - Brooks ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context Best Rgds, Jojo ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun
Hi, try texexec --alone --make metafun and your texexec is (as far as I can judge) far out of date. TeXExec 4.3 - ConTeXt / PRAGMA ADE 1997-2004 is current Patrick -- texshow-web: http://members.ping.de:8061 ConTeXt wiki: http://members.ping.de:8062 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun
you are right...mine is 3.1 but I don't understand...I downloaded cont-tmf.zip yesterday from pragma-ade downloading page... is it not the right place/version? where should I get the lattest? thanks again ! Jose Hi, try texexec --alone --make metafun and your texexec is (as far as I can judge) far out of date. TeXExec 4.3 - ConTeXt / PRAGMA ADE 1997-2004 is current Patrick -- texshow-web: http://members.ping.de:8061 ConTeXt wiki: http://members.ping.de:8062 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun
Hi, but I don't understand...I downloaded cont-tmf.zip yesterday from pragma-ade downloading page... is it not the right place/version? that is the only authorative(spelling?) place to download... There are mirrors, but I don't know how uptodate they are. The output you have sent me (private mail) showed that you use the latest ConTeXt texfiles, but the perl progam texexec was not updated. Did texexec --make --alone metafun work? Patrick -- texshow-web: http://members.ping.de:8061 ConTeXt wiki: http://members.ping.de:8062 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun
yep, it seems to work...it generates metafun.mem in the same directory it was invoked... do I have to invoke texexec --make --alone in a specific directory to perform correct installation of ConTeXt ? I have not seen anything like that mentioned in install document... is lattest version of TexExec in cont-tfm.zip ? Jose Hi, but I don't understand...I downloaded cont-tmf.zip yesterday from pragma-ade downloading page... is it not the right place/version? that is the only authorative(spelling?) place to download... There are mirrors, but I don't know how uptodate they are. The output you have sent me (private mail) showed that you use the latest ConTeXt texfiles, but the perl progam texexec was not updated. Did texexec --make --alone metafun work? Patrick -- texshow-web: http://members.ping.de:8061 ConTeXt wiki: http://members.ping.de:8062 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Re: metafun
Hi Jose, do I have to invoke texexec --make --alone in a specific directory to perform correct installation of ConTeXt ? texexec --make --alone bypasses your distribution's way of installing format files (fmtutil in your case I guess). Put the resulting format files (*.fmt, *efmt, *mem) in texmf/web2c and rerun texhash. I have not seen anything like that mentioned in install document... I guess it is hidden... is lattest version of TexExec in cont-tfm.zip ? Yes. Patrick -- texshow-web: http://members.ping.de:8061 ConTeXt wiki: http://members.ping.de:8062 ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun
Patrick Gundlach wrote: Hi, but I don't understand...I downloaded cont-tmf.zip yesterday from pragma-ade downloading page... is it not the right place/version? that is the only authorative(spelling?) place to download... There are mirrors, but I don't know how uptodate they are. The output you have sent me (private mail) showed that you use the latest ConTeXt texfiles, but the perl progam texexec was not updated. Did texexec --make --alone metafun work? watch out: scripts are now under ../texmf*/scripts/context and no longer under ../texmf/context/ ; normally this should make no difference but ... Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
Re: [NTG-context] Re: metafun
[EMAIL PROTECTED] wrote: yep, it seems to work...it generates metafun.mem in the same directory it was invoked... do I have to invoke texexec --make --alone in a specific directory to perform correct installation of ConTeXt ? I have not seen anything like that mentioned in install document... the problem is that that should be a writable web2c path (maybe i should extend texexec a bit) $TEXFORMATS=path-to-web2c could be set is needed (then you know for sure where things end up) Hans - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl - ___ ntg-context mailing list [EMAIL PROTECTED] http://www.ntg.nl/mailman/listinfo/ntg-context
