Re: [NTG-context] Some macros (Metafun)
On 8/12/2019 12:40 AM, Fabrice Couvreur wrote: Hi Hans, Sorry but I did not see your email. What is the default color used to draw the path p ? drawlineoptions (withpen pencircle scaled 1.0 drawoptionsfactor withcolor .5white) ; drawpointoptions (withpen pencircle scaled 4.0 drawoptionsfactor withcolor black) ; drawcontroloptions(withpen pencircle scaled 2.5 drawoptionsfactor withcolor black) ; drawpathoptions (withpen pencircle scaled 5.0 drawoptionsfactor withcolor .8white) ; - 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 / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Some macros (Metafun)
Hi Hans, Sorry but I did not see your email. What is the default color used to draw the path p ? Thank you. Le ven. 9 août 2019 à 13:12, Hans Hagen a écrit : > On 8/9/2019 10:57 AM, Fabrice Couvreur wrote: > > Hello, > > In the Metafun manual, Hans uses macros like drawpath p ; > > drawcontrollines p ; drawpoints p ; drawcontrolpoints p ... > > How to use them in a document ? > > Where to find source codes ? > > For example, the following code does not work : > > > > \starttext > > \startuseMPgraphic{path} > > path p ; p := (1cm,1cm)--(1.5cm,1.5cm)..(2cm,0cm)..cycle ; > > \stopuseMPgraphic > > > > \startMPcode > >p := p .. cycle ; swappointlabels := true ; > >drawpath p ; > > \stopMPcode > > \stoptext > \starttext > > \startMPcode > path p ; p := (1cm,1cm)--(1.5cm,1.5cm)..(2cm,0cm)..cycle ; > drawpath p ; > drawpoints p ; > drawpointlabels p ; > drawcontrolpoints p ; > drawcontrollines p ; > \stopMPcode > > \stoptext > > > - >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 / > http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://context.aanhet.net > archive : https://bitbucket.org/phg/context-mirror/commits/ > wiki : http://contextgarden.net > > ___ > ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Wrong MetaPost text output
On Sun, 11 Aug 2019 11:12:55 -0700 Henri Menke wrote: > Thank you for the quick repsonse. This looks good to me. However, > could you tell me a way to get the correct baseline with textext? When > I use > > \startMPpage > draw btex dummy etex shifted (0,0); > draw btex foo etex shifted (1.5cm,0); > \stopMPpage > > the baseline is the one that I would expect from TeX, i.e. at the depth > of the “y” is removed or otherwise correctly accounted for. In contrast > when I use > > \startMPpage > draw textext("dummy") shifted (0,0); > draw textext("foo") shifted (1.5cm,0); > \stopMPpage > > the baseline will be below the depth of the “y” which is sometimes > unwanted. textext() is actually textext@#() so you can use textext.top() for example to put the *bottom* of the text bounding box at y=0. Without any @# suffix, the text bounding box gets centered at y=0. Metafun has a few *new* suffixes defined, so you can use textext.d(), textext.dlft(), textext.drt(), I BELIEVE, to position with respect to the tex baseline. (you need to check this). Alan ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Wrong MetaPost text output
On 8/11/19 10:51 AM, Hans Hagen wrote: > I'll do this (lmtx): > > metapost> use 'textext(.)' instead of 'btex . etex' > metapost> rewrapping btex ... etex at the outer level [[dummy]] > metapost> rewrapping btex ... etex at the outer level [["foo"]] > metapost> rewrapping btex ... etex at the outer level [[bar]] > > when this is seen > > def drawtest = > draw btex dummy etex shifted (0,0); > draw btex "foo" etex shifted (1.5cm,0); > draw btex bar etex shifted (3cm,0); > enddef; > > rewrapping can work kind of ok, but it is still more fragile than textext > (which can also be used with variables and concatinated strings and such, > which probably is what one wants to do in macros) Thank you for the quick repsonse. This looks good to me. However, could you tell me a way to get the correct baseline with textext? When I use \startMPpage draw btex dummy etex shifted (0,0); draw btex foo etex shifted (1.5cm,0); \stopMPpage the baseline is the one that I would expect from TeX, i.e. at the depth of the “y” is removed or otherwise correctly accounted for. In contrast when I use \startMPpage draw textext("dummy") shifted (0,0); draw textext("foo") shifted (1.5cm,0); \stopMPpage the baseline will be below the depth of the “y” which is sometimes unwanted. > > 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 / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Wrong MetaPost text output
On 8/11/2019 6:09 PM, Henri Menke wrote: Dear devs, There seems to be a bug in the MetaPost integration of ConTeXt. The MWE below should produce three different labels “dummy foo bar” but instead produces “bar bar bar”. The same example works correctly in plain MetaPost. Originally reported on https://tex.stackexchange.com/questions/503773/strange-behaviour-of-the-btex-etex-construct Cheers, Henri --- \starttext \startMPpage def drawtest(expr i) = %i is not used here draw btex dummy etex shifted (0,0); draw btex foo etex shifted (1.5cm,0); draw btex bar etex shifted (3cm,0); enddef; drawtest(5); \stopMPpage \stoptext It's not a really bug but a side effect. When metapost parses btex .. etex it immediately replaces its content. In mpost the program that is hardcoded as 'call out to tex and convert the dvi result into a picture'. This parsing is not 'delayed' by wrapping in macro. So in this case, what happens is that where normally there is some interplay between context and the library, this kind of gets messed up. Using btex inside a macro body is just a bad idea. def drawtest(expr i) = %i is not used here draw textext("dummy") shifted (0,0); draw textext("foo") shifted (1.5cm,0); draw textext("bar") shifted (3cm,0); enddef; works fine because it is not replaced in the macro body when parsed. In context lmtx I will give a warning when "btex .. etex" is used inside a macro definition. Actually btex/etex is just supported in context as a kind of 'service' (we could just drop it). Anyway, you can advice not to use "btex .. etex" but textext instead. As with all things tex (and mp) with some hasty programming much can be solved but in this case it's not worth the effort and for sure it will bring up other side effects. (In a similar fashion it's not a good idea to have global textexts because there are local stored for them but in that case one can enforce a persistent textext if needed.) 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 / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
[NTG-context] Wrong MetaPost text output
Dear devs, There seems to be a bug in the MetaPost integration of ConTeXt. The MWE below should produce three different labels “dummy foo bar” but instead produces “bar bar bar”. The same example works correctly in plain MetaPost. Originally reported on https://tex.stackexchange.com/questions/503773/strange-behaviour-of-the-btex-etex-construct Cheers, Henri --- \starttext \startMPpage def drawtest(expr i) = %i is not used here draw btex dummy etex shifted (0,0); draw btex foo etex shifted (1.5cm,0); draw btex bar etex shifted (3cm,0); enddef; drawtest(5); \stopMPpage \stoptext ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___