Re: [NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
On 12/10/2020 8:37 PM, Aditya Mahajan wrote:
On Thu, 10 Dec 2020, Hans Hagen wrote:
dotlabel uses a pen to draw the dot, and I am not sure why it uses that rather
than a path. Here is a (to me) simpler definition, where you can change the
shape:
just look in the pdf ... in your case the dot is a n point path while otherwise
it uses the default postscript pen (which is a dot)
Ah, that makes sense.
it surprised me that a math guru like you doesn't do this:
vardef dotlabel@#(expr s,z) text t_ =
% draw textext("$\bullet$") scaled (1/2) shifted z ;
% draw textext("$\blacktriangle$") scaled (1/4) shifted z ;
draw textext("$\blacksquare$") scaled (1/4) shifted z ;
label@#(s,z) t_ ;
enddef ;
\stopMPdefinitions
Ha! I know that you said this as a joke, but as someone who did try to use the old
font-based picture environment in LaTeX back in the day, I would never try to use fonts
for "drawing". Especially, math fonts, where every designer has a different
idea of what the shape should look like.
ah pictex memories ... drawing lines with cmr5 periods ...
but actually, we can define a stable font with symbols in metafun and
use that (quite efficient too) and then one can even cut'n'paste those
tiny symbols (don't worry ... not much of a challenge so low on my list)
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
-
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Re: [NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
On Thu, 10 Dec 2020, Hans Hagen wrote:
> > dotlabel uses a pen to draw the dot, and I am not sure why it uses that
> > rather
> > than a path. Here is a (to me) simpler definition, where you can change the
> > shape:
>
> just look in the pdf ... in your case the dot is a n point path while
> otherwise
> it uses the default postscript pen (which is a dot)
Ah, that makes sense.
> it surprised me that a math guru like you doesn't do this:
>
> vardef dotlabel@#(expr s,z) text t_ =
> % draw textext("$\bullet$") scaled (1/2) shifted z ;
> % draw textext("$\blacktriangle$") scaled (1/4) shifted z ;
> draw textext("$\blacksquare$") scaled (1/4) shifted z ;
> label@#(s,z) t_ ;
> enddef ;
> \stopMPdefinitions
Ha! I know that you said this as a joke, but as someone who did try to use the
old font-based picture environment in LaTeX back in the day, I would never try
to use fonts for "drawing". Especially, math fonts, where every designer has a
different idea of what the shape should look like.
Aditya
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Re: [NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
On 12/10/2020 7:04 PM, Aditya Mahajan wrote: On Thu, 10 Dec 2020, Otared Kavian wrote: Hi Aditya, Thank you very much ! That's great indeed, you gave me an elegant solution. One more question, in order for me to understand a little more: when defining a new dotlabel as you do, might it not conflict with the internal definitions of dotlabel in Metafun in some other place? Maybe it is safer for me to call it something like « dotshapelabel » ? In general, I agree. Redefining internal macros has the advantage that your code doesn't have to change. See, for example: it depends a bit ... redefing dotlabel in a compatible way is kind of ok, but using/redefining \foo_bar_something_internal is a real bad idea as that is not part of the interface (okay, i know that there are macro packages out there where it's part of the concept to redefine low level stuff for styles but in context we should try to avoid it ... we should then adapt the high level interface to suport something) it also depends who does it ... i know that aditya knows the internals well enough to deal with it (one of my concerns is always that while we try to come up with efficient solutions it's easy to make things inefficient but that's not the case here ... unless of course we want to nurture the 'context is slow' meme) 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] Metafun: is it possible to redefine dotlabel to draw a square ?
On 12/10/2020 6:44 PM, Aditya Mahajan wrote:
On Thu, 10 Dec 2020, Otared Kavian wrote:
Hi all,
In Metafun when representing a point I woul dlike to have some dots represented
by a square (or even by another scalable symbol): for instance in the following
I would like the dot at the point B to be a square:
\starttext
\startMPcode
draw (2cm,3cm) -- (3cm,5cm) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), (2cm,3cm))
withpen pencircle scaled 12pt
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), (3cm,5cm))
withpen pencircle scaled 12pt
withcolor transparent("exclusion",.5,red) ;
\stopMPcode
\stoptext
I wonder whether it is possible to define something like « drawsquaredot » or «
squaredotlabel » in order to do this.
dotlabel uses a pen to draw the dot, and I am not sure why it uses that rather
than a path. Here is a (to me) simpler definition, where you can change the
shape:
just look in the pdf ... in your case the dot is a n point path while
otherwise it uses the default postscript pen (which is a dot)
actually fullcircle is pencircle so you can ponder why that is the case -)
\startMPdefinitions
newpath dotlabelshape;
dotlabelshape := fullcircle;
vardef dotlabel@#(expr s,z) text t_ =
label@#(s,z) t_ ;
fill (dotlabelshape scaled 2dotlabeldiam) shifted z t_;
enddef ;
\stopMPdefinitions
\starttext
\startMPcode
newpath p ;
p := (2cm, 3cm) -- (3cm, 5cm);
dotlabeldiam := 12pt;
% Default
draw p;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
withcolor transparent("exclusion",.5,red) ;
% Using a square "dot"
p := p shifted (5cm, 0);
dotlabelshape := fullsquare;
draw p;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
withcolor transparent("exclusion",.5,red) ;
\stopMPcode
\stoptext
These types of macros are also a good candidate for the new LMTX syntax, where
we can make all components configurable via a key-value interface
(labeldistance etc. as well).
it surprised me that a math guru like you doesn't do this:
vardef dotlabel@#(expr s,z) text t_ =
% draw textext("$\bullet$") scaled (1/2) shifted z ;
% draw textext("$\blacktriangle$") scaled (1/4) shifted z ;
draw textext("$\blacksquare$") scaled (1/4) shifted z ;
label@#(s,z) t_ ;
enddef ;
\stopMPdefinitions
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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Re: [NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
On Thu, 10 Dec 2020, Otared Kavian wrote: > Hi Aditya, > Thank you very much ! > That's great indeed, you gave me an elegant solution. > > One more question, in order for me to understand a little more: when defining > a new dotlabel as you do, might it not conflict with the internal definitions > of dotlabel in Metafun in some other place? > Maybe it is safer for me to call it something like « dotshapelabel » ? In general, I agree. Redefining internal macros has the advantage that your code doesn't have to change. See, for example: https://github.com/adityam/mp-sketch/blob/master/mp-sketch.mp Aditya___ 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] Metafun: is it possible to redefine dotlabel to draw a square ?
Hi Aditya,
Thank you very much !
That's great indeed, you gave me an elegant solution.
One more question, in order for me to understand a little more: when defining a
new dotlabel as you do, might it not conflict with the internal definitions of
dotlabel in Metafun in some other place?
Maybe it is safer for me to call it something like « dotshapelabel » ?
Best regards and agin many thanks: Otared
> On 10 Dec 2020, at 18:44, Aditya Mahajan wrote:
>
> On Thu, 10 Dec 2020, Otared Kavian wrote:
>
>> Hi all,
>>
>> In Metafun when representing a point I woul dlike to have some dots
>> represented by a square (or even by another scalable symbol): for instance
>> in the following I would like the dot at the point B to be a square:
>>
>> \starttext
>> \startMPcode
>> draw (2cm,3cm) -- (3cm,5cm) ;
>> dotlabel(textext("\switchtobodyfont[8pt]" & "A"), (2cm,3cm))
>> withpen pencircle scaled 12pt
>> withcolor transparent("exclusion",.5,red) ;
>>
>> dotlabel(textext("\switchtobodyfont[8pt]" & "B"), (3cm,5cm))
>> withpen pencircle scaled 12pt
>> withcolor transparent("exclusion",.5,red) ;
>> \stopMPcode
>> \stoptext
>>
>> I wonder whether it is possible to define something like « drawsquaredot »
>> or « squaredotlabel » in order to do this.
>
> dotlabel uses a pen to draw the dot, and I am not sure why it uses that
> rather than a path. Here is a (to me) simpler definition, where you can
> change the shape:
>
> \startMPdefinitions
> newpath dotlabelshape;
>
> dotlabelshape := fullcircle;
>
> vardef dotlabel@#(expr s,z) text t_ =
>label@#(s,z) t_ ;
>fill (dotlabelshape scaled 2dotlabeldiam) shifted z t_;
> enddef ;
> \stopMPdefinitions
>
> \starttext
> \startMPcode
> newpath p ;
> p := (2cm, 3cm) -- (3cm, 5cm);
> dotlabeldiam := 12pt;
>
> % Default
> draw p;
> dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
>withcolor transparent("exclusion",.5,red) ;
>
> dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
>withcolor transparent("exclusion",.5,red) ;
>
> % Using a square "dot"
> p := p shifted (5cm, 0);
> dotlabelshape := fullsquare;
>
> draw p;
> dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
>withcolor transparent("exclusion",.5,red) ;
>
> dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
>withcolor transparent("exclusion",.5,red) ;
> \stopMPcode
> \stoptext
>
> These types of macros are also a good candidate for the new LMTX syntax,
> where we can make all components configurable via a key-value interface
> (labeldistance etc. as well).
>
> Aditya
>
> ___
> 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
> ___
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Re: [NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
On Thu, 10 Dec 2020, Otared Kavian wrote:
> Hi all,
>
> In Metafun when representing a point I woul dlike to have some dots
> represented by a square (or even by another scalable symbol): for instance in
> the following I would like the dot at the point B to be a square:
>
> \starttext
> \startMPcode
> draw (2cm,3cm) -- (3cm,5cm) ;
> dotlabel(textext("\switchtobodyfont[8pt]" & "A"), (2cm,3cm))
> withpen pencircle scaled 12pt
> withcolor transparent("exclusion",.5,red) ;
>
> dotlabel(textext("\switchtobodyfont[8pt]" & "B"), (3cm,5cm))
> withpen pencircle scaled 12pt
> withcolor transparent("exclusion",.5,red) ;
> \stopMPcode
> \stoptext
>
> I wonder whether it is possible to define something like « drawsquaredot » or
> « squaredotlabel » in order to do this.
dotlabel uses a pen to draw the dot, and I am not sure why it uses that rather
than a path. Here is a (to me) simpler definition, where you can change the
shape:
\startMPdefinitions
newpath dotlabelshape;
dotlabelshape := fullcircle;
vardef dotlabel@#(expr s,z) text t_ =
label@#(s,z) t_ ;
fill (dotlabelshape scaled 2dotlabeldiam) shifted z t_;
enddef ;
\stopMPdefinitions
\starttext
\startMPcode
newpath p ;
p := (2cm, 3cm) -- (3cm, 5cm);
dotlabeldiam := 12pt;
% Default
draw p;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
withcolor transparent("exclusion",.5,red) ;
% Using a square "dot"
p := p shifted (5cm, 0);
dotlabelshape := fullsquare;
draw p;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), point 0 of p)
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), point 1 of p)
withcolor transparent("exclusion",.5,red) ;
\stopMPcode
\stoptext
These types of macros are also a good candidate for the new LMTX syntax, where
we can make all components configurable via a key-value interface
(labeldistance etc. as well).
Aditya
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[NTG-context] Metafun: is it possible to redefine dotlabel to draw a square ?
Hi all,
In Metafun when representing a point I woul dlike to have some dots represented
by a square (or even by another scalable symbol): for instance in the following
I would like the dot at the point B to be a square:
\starttext
\startMPcode
draw (2cm,3cm) -- (3cm,5cm) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "A"), (2cm,3cm))
withpen pencircle scaled 12pt
withcolor transparent("exclusion",.5,red) ;
dotlabel(textext("\switchtobodyfont[8pt]" & "B"), (3cm,5cm))
withpen pencircle scaled 12pt
withcolor transparent("exclusion",.5,red) ;
\stopMPcode
\stoptext
I wonder whether it is possible to define something like « drawsquaredot » or «
squaredotlabel » in order to do this.
If I use for B the command
withpen pensquare scaled 12pt
then the dot is a square, but the label B is drawn in a strange way.
Thanks for any help: Otared
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Re: [NTG-context] LMTX, repeated caption
On 12/10/2020 10:58 AM, Jean-Philippe Rey wrote:
Dear list,
In some unclear circumstances, a figure caption is repeated above the figure,
as with the following example.
==
\starttext
\placefigure
{This caption shouldn't be repeated}
{\hbox{anything here}}
\stoptext
==
The caption is not repeated for all figures. With a longer caption or a wider
figure, the bug disappears. My guess is that it is triggered by a certain ratio
between caption length and figure width!
I hope this helps.
fixed in next upload
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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Re: [NTG-context] LMTX, repeated caption
Hello
I have the same problem.
I noticed that it depends on the length of the caption.
Best regards.
Le 10/12/2020 à 10:58, Jean-Philippe Rey a écrit :
Dear list,
In some unclear circumstances, a figure caption is repeated above the figure,
as with the following example.
==
\starttext
\placefigure
{This caption shouldn't be repeated}
{\hbox{anything here}}
\stoptext
==
The caption is not repeated for all figures. With a longer caption or a wider
figure, the bug disappears. My guess is that it is triggered by a certain ratio
between caption length and figure width!
I hope this helps.
Best regards,
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[NTG-context] LMTX, repeated caption
Dear list,
In some unclear circumstances, a figure caption is repeated above the figure,
as with the following example.
==
\starttext
\placefigure
{This caption shouldn't be repeated}
{\hbox{anything here}}
\stoptext
==
The caption is not repeated for all figures. With a longer caption or a wider
figure, the bug disappears. My guess is that it is triggered by a certain ratio
between caption length and figure width!
I hope this helps.
Best regards,
--
Jean-Philippe Rey
jean-philippe@centralesupelec.fr
91192 Gif-sur-Yvette Cedex - France
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