Re: [NTG-context] shading in meta[post/play] & PDF
Hans Hagen wrote:
Mojca Miklavec wrote:
How can I make shading inside metapost(play) to produce exactly what's
in the attached picture (smooth shades). Or more generally: how can I
"hardcode" some PS/PDF code in .mp, not (yet) supported by
metapost(play)?
certain kind of native level 2 shaded can be done with the metafun
macros (circular and linear vector based)
a couple of years ago mathew baker and i played with more advanced
features using functions and such but i need to locate that code;
if you're willing to figure out what (in pdf) functionality is needed i
can extend the current metapost shading handler with a few more
alternatives [the function based ones, since that's what you're looking
for])
I'm not sure if I understood the question correctly (about what should I
figure out).
I would like to draw a sphere (possibly with different colors on
different points of the sphere; which would then be interpolated across
the whole surface).
Problem description:
I have a computer program, which carries the data about the grid points
on a sphere (possibly with different colors defined in these points) and
how the points are connected with each other to form a grid. I would
take these triangles (or quadrilaterals), draw them transformed on the
plane (with curves, not with straight lines) and fill them with the
appropriate shading pattern (colors defined in corners of the triangles
(darker according to normal vector) simply interpolated between the
three points). Yet another possibility would probably be to use
function-based shading and define a function which knows how the points
have to be shaded on the sphere, but the latter seems more complicated
and less universal.
Problem reduction:
Fill a mp closed path with any more complex shading.
So I would probably need Type 6 or 7 shading (Type 4 would be OK as the
picture can be clipped within metapost, so that the resulting sphere
borders are not composed of straight lines; the articles on
http://www.math.ubc.ca/people/faculty/cass/graphics/text/www/ which
inspired me to do something so crazy actually use Type 4 shading). Type
one is probably the most general one, so it should be OK too, just
complicated to do.
However: I'm not sure if, say, a (sampled) function to be passed to PDF
can be specified in metapost elegantly.
Page 746 of PDF Reference, version 1.6 also defines an interesting new
feature: 3D objects (3D Artwork as they call it), but I haven't found
anything else about that.
In dvipdfm there's an example of using:
\special{pdf: bt rotate 90 xscale 2.0 }
These lines are to be used in TeX. MetaPost also knows a "special"
command, I just don't know how to use it. (This is probably the
"communication channel" to PDF when trying to implement some more exotic
shadings.)
I glimpsed the mp-spec.mp file, but I didn't yet understand how the
parameters are passed to PDF.
[more a context mailing list issue than a metapost list issue]
So I left the metapost group out. Actually, 90% on the people here
probably think I posted that to the wrong group anyway (in the sense of
"Are you sure you didn't want to post that question to the 3D studio max
mailing list?" :) The example above is probably not the most descriptive
one, but having the possibility to add some more advanced shading
patterns would be great.
Thank you,
Mojca
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Re: Re[2]: [NTG-context] Greek font in Footnote problem
Guiseppe and Thomas—
A quick run though with my test file indicates that
\def\localgreek#1{\scantokens{\Gf\enablegreek#1}}
will work in the body text, but only if one enters the Greek code using
double braces as follows:
{\localgreek{Greek code}}
With single braces either the Greek turns on and stays on thereafter or
the breathings get messed up with initial spaces.
Still no Greek in the footnotes, though.
Alan
On Jan 19, 2005, at 7:05 AM, Giuseppe Bilotta wrote:
Wednesday, January 19, 2005 Thomas A.Schmitz wrote:
On Jan 17, 2005, at 4:54 PM, Giuseppe Bilotta wrote:
enablegreek relies on catcode changes, so it cannot work inside
commands. It should be redefined to make use of e-TeX's
\scantoken feature so that it can re-parse its input.
Giuseppe,
I'll be too bust the next three weeks to look into this, but would
love
to correct my quick and dirty hack. Can you give me a hint where I can
learn more about \scantoken and how I can implement it for my Greek
stuff?
Ehehehe. The reason why I was so generic in my answer is
precisely the same :)
Something like
\def\localgreek#1{\scantokens{\Gf\enablegreek#1}}
could work.
--
Giuseppe "Oblomov" Bilotta
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Re[2]: [NTG-context] Greek font in Footnote problem
Wednesday, January 19, 2005 Thomas A.Schmitz wrote:
> On Jan 17, 2005, at 4:54 PM, Giuseppe Bilotta wrote:
>> enablegreek relies on catcode changes, so it cannot work inside
>> commands. It should be redefined to make use of e-TeX's
>> \scantoken feature so that it can re-parse its input.
> Giuseppe,
> I'll be too bust the next three weeks to look into this, but would love
> to correct my quick and dirty hack. Can you give me a hint where I can
> learn more about \scantoken and how I can implement it for my Greek
> stuff?
Ehehehe. The reason why I was so generic in my answer is
precisely the same :)
Something like
\def\localgreek#1{\scantokens{\Gf\enablegreek#1}}
could work.
--
Giuseppe "Oblomov" Bilotta
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Re: [NTG-context] french hyphenation after l-apostrophe doesn't work
On Thu, 20 Jan 2005, Steffen Wolfrum wrote:
> when, in a french project, the line ends with e.g. l'int\'{e}r^{e}t
> then context doesn't hyphenate "l'interet" and the line gets stretched.
> (If I wouldn't have the l-apostroph construction then the word is
> hyphenated "in-teret", so its hyphenation is know to TeX.)
Hello Steffen,
perhaps you just need a font with "real" accented characters, such as
Latin-Modern. This works for me:
\enableregime[il1]
\usetypescript[modern][texnansi]
\setupbodyfont[modern]
\starttext
\dorecurse{50}{l'intérêt }
\stoptext
Cheers, Peter
--
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[NTG-context] french hyphenation after l-apostrophe doesn't work
Hi,
when, in a french project, the line ends with e.g. l'int\'{e}r^{e}t
then context doesn't hyphenate "l'interet" and the line gets stretched.
(If I wouldn't have the l-apostroph construction then the word is hyphenated
"in-teret", so its hyphenation is know to TeX.)
But for I have a lot of this "l-apostroph" constructions at line endings in my
document it is impossible to type individually \- at the best breaking points
(here after "in-"). I need to have a global option that re-activates the
hyphenation even if the word starts with l-apostroph.
When I typeset the apostrophe like a slash: l|'|int\'{e}r^{e}t
then the line gets broken, but after "l'" and I was told this is wrong in
french.
So what else could be done to automatically break int\'{e}r^{e}t again but
*not* after l' ?
Thank you for any help,
Steffen
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Re: [NTG-context] UTF-8 XML to IL2
Vit Zyka said this at Thu, 20 Jan 2005 16:06:55 +0100:
>
>please, I have UTF-8 XML file and I want to typeset with IL2 (czech)
>font. What I have to do?
>
>Thank you
>Vit Zyka
>
>P.S. I tried:
> \useregime[utf]
> \defineXMLenvironment[doc] \starttext \stoptext
> \processXMLfile{manaana.xml}
It depends on how your il2 font is defined locally (like in terms of the
typescript), but it should work with something like:
\useregime[utf]
\usetypescript [all] [latin-modern] [il2]
\setupbodyfont[reset]
\setupbodyfont[cmr]
\defineXMLenvironment...(etc.)
>But I guess the Unicode -> IL2 mapping is missing.
There's a Unicode -> ConTeXt named glyph mapping (unic-*),
and a ConTeXt named glyph -> ISO Latin 2 mapping (enco-il2),
so it *should* work!
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Lancaster University, InfoLab21+44(0)1524/510.514
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[NTG-context] UTF-8 XML to IL2
Dear ConTeXters,
please, I have UTF-8 XML file and I want to typeset with IL2 (czech)
font. What I have to do?
Thank you
Vit Zyka
P.S. I tried:
\useregime[utf]
\defineXMLenvironment[doc] \starttext \stoptext
\processXMLfile{manaana.xml}
But I guess the Unicode -> IL2 mapping is missing.
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Re: [NTG-context] ConTeXt tool for enabling comments in PDF ?
h h extern wrote: Vit Zyka wrote: So, to do that, pdfTeX should start to calc document diggest and there should be standard(?) process of signing this value. how is that one calculated, imagine that in the %! fields you fill in placeholders like hereshouldgosomemagiccode, then one can run a script over the pdf, calculate that magic, and replace the string; maybe this can be hooked into xpdflib Hans Yes, I agree, postprocessing is possible. But I did not find any digest computing alg in the range of C/C++ or Perl. Also do not known links to xpdflib. Vit Zyka ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] How to learn ConTeXt?
Hello everyone! My question is as in subject: how to learn ConTeXt? And another ones: How to install ConTeXt? Manually or from, e.g., TeXlive? I would like to typeset in Antykwa Torunska or Antykwa Poltawskiego. Setting \setupbodyfont[...] yields errors about missing ec-ant* fonts (I use the TeXlive 2004 installation, the same thing happened in TeXlive 2003). Greetings -- Marcin Borkowski ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
[NTG-context] Setting up a sombined list ...
Hi,
I am trying to setup a special TOC which should show the version instead
of a pagenumber. My approach was to setup newheads with \definehead[][]
and defining a new combined list.
The struggle is that I can't manage to get the list entries numbered and
the lower level listentries are not indented as intended.
Could some one give me a clue where I am missing the proper options.
Please try the attached minimal file.
Tanks and kind regards
Willi
%test
\def\Version{20-01-2005}
\definehead[Mypart][part]
\setuphead[Mypart][number=yes,placehead=no]
\definehead[Mychapter][chapter]
\definehead[Mysection][section]
\definecombinedlist[Mycontent][Mypart,Mychapter,Mysection]
\setuplist[Mycontent]
[level=Mypart,pagenumber=no]
\setuplist[Mycontent]
[level=Mychapter,distance=4em]
\setuplist[Mychapter][pagenumber=no]
\setuplist[Mysection][pagenumber=no]
\starttext
\completeMycontent[criterium=all]
\expanded{\writetolist[Mypart]{Test Part 1}{}}
\dorecurse{3}{%
\chapter[Ch-Test]{Test}
\expanded{\writetolist[Mychapter]{Test \recurselevel}{\hfill
Version:~ \Version}}
\input ward
}
\section{Problems seen:}
\startitemize[2,packed]
\item With the configuration above, the Mypart has still a
pagenumber in the TOC.
\item In the \type{\completeMycontent} the chapters are not
indented.
\item I would expect that the TOC entries would be numbered.
\stopitemize
\stoptext
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Re: [NTG-context][metapost] shading in meta[post/play] & PDF
On Wed, 19 Jan 2005, Mojca Miklavec wrote: > > How can I make shading inside metapost(play) to produce exactly what's > in the attached picture (smooth shades). Or more generally: how can I > "hardcode" some PS/PDF code in .mp, not (yet) supported by metapost(play)? > This is a very difficult question. For an excellent introduction to shading and other subjects I recommend: Jones, Huw. _Computer Graphics through Key Mathematics_. Springer-Verlag London Limited 2001. ISBN 1-85233-422-3. > > Here's the corresponding PostScript code: > Sorry, I don't know PostScript. > > >>The spheres drawn directly in PostScript as in the examples above still > >>have straight lines (well, I agree that with some mathematics it would > >>be possible to draw them with proper splines as well). > >> To the best of my knowledge, spline curves are drawn by means of calculating short line segments. You can make the "time" parameter as small as you like, but you can't make it 0. I believe plotters can draw genuine curves---and it's a lot more fun to watch them work (it's like magic). They're not so great at filling in regions, though. Much to my regret, the computer center here got rid of the plotter. They're probably as obsolete as the ENIAC now, except perhaps for very high-quality work. > Thank you, My pleasure. Laurence ___ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
