Circled text in metapost

Gerhard Kugler

29 Mar 2018 29 Mar '18

11:28 a.m.

Hi, in documentations I can find various examples of circled text. But copying them I had no success till now. I want to place text in half circles of various radiuses. Is there anywhere a simple example? My greatest problems seem to be in the embedding code. Gerhard -- Gerhard Kugler Bensheim

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Henri Menke

29 Mar 29 Mar

11:52 a.m.

On 03/29/2018 10:28 PM, Gerhard Kugler wrote:

...

Hi,

in documentations I can find various examples of circled text. But copying them I had no success till now.

I want to place text in half circles of various radiuses. Is there anywhere a simple example?

The Metafun experts would probably tear this apart... \startuniqueMPgraphic{half circle} path p, q ; p := fullcircle scaled OverlayWidth; q := (p cutafter (point .5 along p)) shifted (0,-.5BodyFontSize) ; fill q -- cycle withcolor lightgray ; draw q withpen pencircle scaled 2pt withcolor darkred ; setbounds currentpicture to boundingbox p ; \stopuniqueMPgraphic \defineoverlay[half circle][\uniqueMPgraphic{half circle}] \starttext \framed[background=half circle,frame=off]{Text width half circle.} \stoptext

...

My greatest problems seem to be in the embedding code.

Gerhard

Hans Hagen

12:17 p.m.

On 3/29/2018 11:52 AM, Henri Menke wrote:

...

On 03/29/2018 10:28 PM, Gerhard Kugler wrote:

...
Hi,

in documentations I can find various examples of circled text. But copying them I had no success till now.

I want to place text in half circles of various radiuses. Is there anywhere a simple example?

The Metafun experts would probably tear this apart...

\startuniqueMPgraphic{half circle} path p, q ; p := fullcircle scaled OverlayWidth; q := (p cutafter (point .5 along p)) shifted (0,-.5BodyFontSize) ; fill q -- cycle withcolor lightgray ; draw q withpen pencircle scaled 2pt withcolor darkred ; setbounds currentpicture to boundingbox p ; \stopuniqueMPgraphic

\defineoverlay[half circle][\uniqueMPgraphic{half circle}]

\starttext

\framed[background=half circle,frame=off]{Text width half circle.}

\stoptext

Well, if you really want a tear down ... \startuniqueMPgraphic{half circle} path p ; p := halfcircle scaled OverlayWidth shifted center OverlayBox ; path q ; q := p shifted (0,-StrutDepth) ; draw image ( fill q -- cycle withcolor OverlayColor ; draw q withcolor OverlayLineColor ; ) withpen pencircle scaled 2pt ; setbounds currentpicture to boundingbox OverlayBox ; \stopuniqueMPgraphic \defineoverlay[half circle][\uniqueMPgraphic{half circle}] \starttext \framed [background=half circle, frame=off, framecolor=red, backgroundcolor=lightgray] {Text width half circle.} \framed [background=half circle, frame=off, framecolor=red, backgroundcolor=lightgray] {Text width half circle and more.} \stoptext

...

...
My greatest problems seem to be in the embedding code.

Gerhard

___________________________________________________________________________________ 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 ___________________________________________________________________________________

-- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

Gerhard Kugler

12:43 p.m.

Thank you very much for these examples. The most important hints are given now. Perhaps I am able to apply them. One misunderstanding made by my post: I want to write the text curved as a (half-)circle. Gerhard -- Gerhard Kugler Bensheim

Alan Braslau

3:11 p.m.

On Thu, 29 Mar 2018 12:43:56 +0200 Gerhard Kugler wrote:

...

One misunderstanding made by my post: I want to write the text curved as a (half-)circle.

Take a look at the Metafun manual. Alan

Gerhard Kugler

6:05 p.m.

On Thu, Mar 29, 2018 at 07:11:50AM -0600, Alan Braslau wrote:

...

On Thu, 29 Mar 2018 12:43:56 +0200 Gerhard Kugler wrote:

...
One misunderstanding made by my post: I want to write the text curved as a (half-)circle.

Take a look at the Metafun manual.

In the manual is an example on page 233 with the following content: ----- \def\rotatetokens#1#2#3#4% delta extra radius tokens {\vbox\bgroup \MPtoks\emptytoks \resetMPdrawing \startMPdrawing picture pic[] ; numeric wid, len[], rot ; numeric delta, extra, radius, n, r ; len[0] := n := 0 ; delta := #1 ; extra := #2 ; radius := #3 ; \stopMPdrawing \handletokens#4\with\processrotationtoken \startMPdrawing r := len[n]/Pi ; for i=1 upto n : wid := abs(xpart lrcorner pic[i] - xpart llcorner pic[i]) ; rot := extra + delta - ((len[i]-.5wid)/len[n]) * (180+2delta) ; draw pic[i] rotatedaround (origin,-270) shifted (-r-radius, ypart -.5[ulcorner pic[i], llcorner pic[i]]) rotatedaround (origin,rot) ; endfor ; \stopMPdrawing \MPdrawingdonetrue \getMPdrawing \resetMPdrawing \egroup} \startcombination[3*1] {\rotatetokens {0} {0}{0}{Does it work ok?}} {A} {\rotatetokens{20} {0}{0}{Does it work ok?}} {B} {\rotatetokens{20}{30}{0}{Does it work ok?}} {C} \stopcombination ----- But I cannot see what part calls what parts and how they can be embedded. Gerhard -- Gerhard Kugler Bensheim

Gerhard Kugler

30 Mar 30 Mar

1:31 p.m.

Hello, my problem is that in other programming langguages there is a main procedure which calls others. In metapost in the context of ConteXt I can use \starttext ... \stoptext or \startMPpage ... \stopMPpage or \beginfig ... \endfig And it seems not to be transparent how procedures are called. Gerhard -- Gerhard Kugler Bensheim

Alan Braslau

4:44 p.m.

Hello, luatex includes the MetaPost library MPlib, so MetaPost code is called and then injected into the output stream. As a user, it is useful to know that MP is in fact called in two passes, thus twice, and this can have some unexpected consequences when not programmed cleanly. Global variable storage, for example, can reflect the multiple passes. Take the following (silly) example: \starttext \startMPcode if unknown n : n := 0 ; fi n := n + 1 ; draw textext(decimal n) ; \stopMPcode \startMPcode n := n + 1 ; draw textext(decimal n) ; \stopMPcode \stoptext yielding: 1 3 (perhaps Hans or Taco can explain why one does not get 2 4) This side effect is somewhat handled by the fact that each call to MP is treated as a group : begingroup ... endgroup so \startMPcode save n ; n := 0 ; ... \stopMPcode works as expected, but n is then local and becomes unknown (or keeps its global value) for subsequent calls to MP. What should be understood is that calls to MP returns a bounding box to TeX, and space is reserved for this bounding box. Likewise, calls within MP to TeX, for example textext() or label(), or btex ... etex returns a bounding box to MP, and this (picture) object is placed in the graphic. Mechanisms exist allowing the passing of values of variables via lua (as strings, in fact). This is a more advanced subject. Now, there are a number of ways of calling MP from TeX, directly as above, but also as unique MP graphics or as reusable MP graphics, ... This is another subject all together. Hopefully this helps some. Alan On Fri, 30 Mar 2018 13:31:30 +0200 Gerhard Kugler wrote:

...

Hello,

my problem is that in other programming langguages there is a main procedure which calls others. In metapost in the context of ConteXt I can use \starttext ... \stoptext or \startMPpage ... \stopMPpage or \beginfig ... \endfig

And it seems not to be transparent how procedures are called.

Gerhard

Gerhard Kugler

5:51 p.m.

Thank you, this seems a very informative explanation for me, and now I will try to transpose it for my intention. Gerhard On Fri, Mar 30, 2018 at 08:44:23AM -0600, Alan Braslau wrote:

...

Hello,

luatex includes the MetaPost library MPlib, so MetaPost code is called and then injected into the output stream...

-- Gerhard Kugler Bensheim

Henri Menke

31 Mar 31 Mar

1:22 a.m.

On Thu, 2018-03-29 at 18:05 +0200, Gerhard Kugler wrote:

...

On Thu, Mar 29, 2018 at 07:11:50AM -0600, Alan Braslau wrote:

...
On Thu, 29 Mar 2018 12:43:56 +0200 Gerhard Kugler wrote:

...
One misunderstanding made by my post: I want to write the text curved as a (half-)circle.

Take a look at the Metafun manual.

In the manual is an example on page 233 with the following content:

Nah! Don't use those macros. They are only for demonstration. Use the builtin \followtokens instead: \loadmarkfile{meta-imp-txt} % is this supposed to be loaded like that? \starttext \startuseMPgraphic{followtokens} path RotPath ; RotPath := reverse halfcircle ; \stopuseMPgraphic \followtokens{Text on a half circle} \stoptext

...

-----

\def\rotatetokens#1#2#3#4% delta extra radius tokens {\vbox\bgroup \MPtoks\emptytoks \resetMPdrawing \startMPdrawing picture pic[] ; numeric wid, len[], rot ; numeric delta, extra, radius, n, r ; len[0] := n := 0 ; delta := #1 ; extra := #2 ; radius := #3 ; \stopMPdrawing \handletokens#4\with\processrotationtoken \startMPdrawing r := len[n]/Pi ; for i=1 upto n : wid := abs(xpart lrcorner pic[i] - xpart llcorner pic[i]) ; rot := extra + delta - ((len[i]-.5wid)/len[n]) * (180+2delta) ; draw pic[i] rotatedaround (origin,-270) shifted (-r-radius, ypart -.5[ulcorner pic[i], llcorner pic[i]]) rotatedaround (origin,rot) ; endfor ; \stopMPdrawing \MPdrawingdonetrue \getMPdrawing \resetMPdrawing \egroup}

\startcombination[3*1] {\rotatetokens {0} {0}{0}{Does it work ok?}} {A} {\rotatetokens{20} {0}{0}{Does it work ok?}} {B} {\rotatetokens{20}{30}{0}{Does it work ok?}} {C} \stopcombination

-----

But I cannot see what part calls what parts and how they can be embedded.

Gerhard

Henri Menke

1:25 a.m.

On Sat, 2018-03-31 at 12:22 +1300, Henri Menke wrote:

...

On Thu, 2018-03-29 at 18:05 +0200, Gerhard Kugler wrote:

...
On Thu, Mar 29, 2018 at 07:11:50AM -0600, Alan Braslau wrote:

...
On Thu, 29 Mar 2018 12:43:56 +0200 Gerhard Kugler wrote:

...
One misunderstanding made by my post: I want to write the text curved as a (half-)circle.

Take a look at the Metafun manual.

In the manual is an example on page 233 with the following content:

Nah! Don't use those macros. They are only for demonstration. Use the builtin \followtokens instead:

\loadmarkfile{meta-imp-txt} % is this supposed to be loaded like that?

\loadmarkfile{meta-imp-txt} is the wrong way. It's supposed to be \useMPlibrary[txt]

...

\starttext

\startuseMPgraphic{followtokens} path RotPath ; RotPath := reverse halfcircle ; \stopuseMPgraphic \followtokens{Text on a half circle}

\stoptext

...
-----

\def\rotatetokens#1#2#3#4% delta extra radius tokens {\vbox\bgroup \MPtoks\emptytoks \resetMPdrawing \startMPdrawing picture pic[] ; numeric wid, len[], rot ; numeric delta, extra, radius, n, r ; len[0] := n := 0 ; delta := #1 ; extra := #2 ; radius := #3 ; \stopMPdrawing \handletokens#4\with\processrotationtoken \startMPdrawing r := len[n]/Pi ; for i=1 upto n : wid := abs(xpart lrcorner pic[i] - xpart llcorner pic[i]) ; rot := extra + delta - ((len[i]-.5wid)/len[n]) * (180+2delta) ; draw pic[i] rotatedaround (origin,-270) shifted (-r-radius, ypart -.5[ulcorner pic[i], llcorner pic[i]]) rotatedaround (origin,rot) ; endfor ; \stopMPdrawing \MPdrawingdonetrue \getMPdrawing \resetMPdrawing \egroup}

\startcombination[3*1] {\rotatetokens {0} {0}{0}{Does it work ok?}} {A} {\rotatetokens{20} {0}{0}{Does it work ok?}} {B} {\rotatetokens{20}{30}{0}{Does it work ok?}} {C} \stopcombination

-----

But I cannot see what part calls what parts and how they can be embedded.

Gerhard

Gerhard Kugler

7:22 p.m.

Hi, my very slow proceedings are here: -------- \useMPlibrary[txt] \starttext \setupbodyfont[pp1] \setupcolors[state=start] \setuplayout [topspace=192pt, backspace=48pt, cutspace=12pt, width=400pt, margin=0cm, rightedge=88pt, rightedgedistance=48pt, header=0cm, footer=0cm, height=400pt] \startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; \stopuseMPgraphic \followtokens{Dies ist ein anderer Text} \startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 14cm rotated 180 ; \stopuseMPgraphic \followtokens{Dies ist ein selbst geschriebener Text} -------- But I want to place the round lines concentrically in a circle (more than two). And I want to place all the lines on colored circled background. In the nice children programming language "logo" it is easy, but yealds pixle grapics only. Gerhard -- Gerhard Kugler Bensheim

Hans Hagen

2 Apr 2 Apr

3:16 p.m.

On 3/31/2018 7:22 PM, Gerhard Kugler wrote:

...

Hi,

my very slow proceedings are here:

--------

\useMPlibrary[txt]

\starttext

\setupbodyfont[pp1]

\setupcolors[state=start]

\setuplayout [topspace=192pt, backspace=48pt, cutspace=12pt, width=400pt, margin=0cm, rightedge=88pt, rightedgedistance=48pt, header=0cm, footer=0cm, height=400pt]

\startuseMPgraphic{followtokens} path RotPath ;

RotPath := halfcircle scaled 7cm rotated 180 ;

\stopuseMPgraphic

\followtokens{Dies ist ein anderer Text}

\startuseMPgraphic{followtokens} path RotPath ;

RotPath := halfcircle scaled 14cm rotated 180 ;

\stopuseMPgraphic

\followtokens{Dies ist ein selbst geschriebener Text}

--------

But I want to place the round lines concentrically in a circle (more than two). And I want to place all the lines on colored circled background. \useMPlibrary[txt]

\starttext \startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; \stopuseMPgraphic \followtokens{Dies ist ein anderer Text} \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 -----------------------------------------------------------------

Alan Braslau

4:51 p.m.

On Mon, 2 Apr 2018 15:16:11 +0200 Hans Hagen wrote:

...

\useMPlibrary[txt]

\starttext

\startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; \stopuseMPgraphic

\followtokens{Dies ist ein anderer Text}

\stoptext

or, perhaps (a question of taste): for i=1 upto 6 : draw RotPath scaled (i/7) ; endfor ; Alan

Gerhard Kugler

5:52 p.m.

Thank you very much! And if I want to place different text between the (half-)circles? Gerhard On Mon, Apr 02, 2018 at 03:16:11PM +0200, Hans Hagen wrote:

...

\useMPlibrary[txt]

\starttext

\startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; \stopuseMPgraphic

\followtokens{Dies ist ein anderer Text}

\stoptext

-- Gerhard Kugler Bensheim

Hans Hagen

6:08 p.m.

On 4/2/2018 5:52 PM, Gerhard Kugler wrote:

...

Thank you very much!

And if I want to place different text between the (half-)circles?

\startuseMPgraphic{followtokens-1} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; setbounds currentpicture to boundingbox halfcircle scaled 7cm rotated 180 ; \stopuseMPgraphic \startuseMPgraphic{followtokens-2} path RotPath ; RotPath := halfcircle scaled 6cm rotated 180 ; setbounds currentpicture to boundingbox halfcircle scaled 7cm rotated 180 ; \stopuseMPgraphic \startoverlay {\startuseMPgraphic{followtokens}\includeMPgraphic{followtokens-1}\stopuseMPgraphic \followtokens{\strut Dies ist ein anderer Text\strut}} {\startuseMPgraphic{followtokens}\includeMPgraphic{followtokens-2}\stopuseMPgraphic \followtokens{\strut Less text than before\strut}} \stopoverlay

...

On Mon, Apr 02, 2018 at 03:16:11PM +0200, Hans Hagen wrote:

...
\useMPlibrary[txt]

\starttext

\startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; \stopuseMPgraphic

\followtokens{Dies ist ein anderer Text}

\stoptext

Gerhard Kugler

6:34 p.m.

Finally I want to place 8 (halfcircled) texts within 8 colores (full)rings. Your proposal places the second text outside of the circles. Gerhard On Mon, Apr 02, 2018 at 06:08:56PM +0200, Hans Hagen wrote:

...

On 4/2/2018 5:52 PM, Gerhard Kugler wrote:

...
Thank you very much!

And if I want to place different text between the (half-)circles?

\startuseMPgraphic{followtokens-1} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; setbounds currentpicture to boundingbox halfcircle scaled 7cm rotated 180 ; \stopuseMPgraphic

\startuseMPgraphic{followtokens-2} path RotPath ; RotPath := halfcircle scaled 6cm rotated 180 ; setbounds currentpicture to boundingbox halfcircle scaled 7cm rotated 180 ; \stopuseMPgraphic

\startoverlay

{\startuseMPgraphic{followtokens}\includeMPgraphic{followtokens-1}\stopuseMPgraphic \followtokens{\strut Dies ist ein anderer Text\strut}}

{\startuseMPgraphic{followtokens}\includeMPgraphic{followtokens-2}\stopuseMPgraphic \followtokens{\strut Less text than before\strut}} \stopoverlay

...
On Mon, Apr 02, 2018 at 03:16:11PM +0200, Hans Hagen wrote:

...
\useMPlibrary[txt]

\starttext

\startuseMPgraphic{followtokens} path RotPath ; RotPath := halfcircle scaled 7cm rotated 180 ; for i=1 upto 6 : draw halfcircle scaled (i*cm) rotated 180 ; endfor ; \stopuseMPgraphic

\followtokens{Dies ist ein anderer Text}

\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 ___________________________________________________________________________________

-- Gerhard Kugler Bensheim

Gerhard Kugler

7:21 p.m.

Perhaps it is better if I send the final graphic which I have prorammed with the programming langguage "logo". See attachment! The problem: it is pixel graphic. Gerhard On Mon, Apr 02, 2018 at 06:34:42PM +0200, Gerhard Kugler wrote:

...

Finally I want to place 8 (halfcircled) texts within 8 colores (full)rings. Your proposal places the second text outside of the circles.

-- Gerhard Kugler Bensheim

Alan Braslau

7:30 p.m.

This is very easy to do in MetaPost, but you should not expect the mailing list to design your graphic for you. Alan On Mon, 2 Apr 2018 19:21:05 +0200 Gerhard Kugler wrote:

...

Perhaps it is better if I send the final graphic which I have prorammed with the programming langguage "logo". See attachment!

The problem: it is pixel graphic.

Gerhard

On Mon, Apr 02, 2018 at 06:34:42PM +0200, Gerhard Kugler wrote:

...
Finally I want to place 8 (halfcircled) texts within 8 colores (full)rings. Your proposal places the second text outside of the circles.

Gerhard Kugler

7:48 p.m.

On Mon, Apr 02, 2018 at 11:30:05AM -0600, Alan Braslau wrote:

...

This is very easy to do in MetaPost, but you should not expect the mailing list to design your graphic for you.

You are right totally. It is not my expectation. I succeeded in programming several graphics in metapost in the past. But in the present I am a blockhead. Gerhard -- Gerhard Kugler Bensheim

Gerhard Kugler

5 Apr 5 Apr

7:32 a.m.

One question: How can I give the several half circle text lines the same origin (that of the circles)? Gerhard -- Gerhard Kugler Bensheim

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Alan Braslau
Gerhard Kugler
Hans Hagen
Henri Menke