Can I share METAPOST vardefs over multiple pages?

Can I share METAPOST vardefs over multiple pages?

[Gerben Wierda]

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Suppose I have this code:

\startMPpage

vardef MyShape(expr w, h) =
   save pth; path pth ;
   save pic; picture pic;
   pth = fullsquare xysized (w, h);
   pic := image (
       draw pth;
       % all kind of stuff here
   );
   setbounds pic to pth;
   pic
enddef ;

picture s ; s := MyShape(4cm, 2cm);

draw s;

drawdot center leftboundary  s withpen pencircle scaled 2 withcolor green;
drawdot center rightboundary s withpen pencircle scaled 2 withcolor blue;
drawdot point .25 along topboundary s withpen pencircle scaled 2 withcolor yellow;
drawdot .25[llcorner s, lrcorner s] withpen pencircle scaled 2 withcolor magenta;
drawdot origin  withpen pencircle scaled 2 withcolor red;

\stopMPpage

Can I reuse that varied across follow-up MPPages?

G


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Re: Can I share METAPOST vardefs over multiple pages?

[Taco Hoekwater]

Hi,



> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
> 
> Suppose I have this code:
> 
> 
> Can I reuse that varied across follow-up MPPages?

Sure, put the vardef inside \startMPinclusions:

\startMPinclusions
vardef MyShape(expr w, h) =
   ...
enddef ;
\stopMPinclusions
\startMPpage
picture s ; s := MyShape(4cm, 2cm);

draw s;
 . . .
\stopMPpage

\startMPpage
picture s ; s := MyShape(8cm, 4cm);

draw s;
 . . .
\stopMPpage


Taco

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Re: Can I share METAPOST vardefs over multiple pages?

[Aditya Mahajan]

On Fri, 13 Mar 2020, Taco Hoekwater wrote:

> Hi,
>
>
>
>> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
>> 
>> Suppose I have this code:
>> 
>> 
>> Can I reuse that varied across follow-up MPPages?
>
> Sure, put the vardef inside \startMPinclusions:

or \startMPdefinitions ... \stopMPdefinitions (don't remember what is the 
difference between inclusions and definitions, now).

Aditya
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Re: Can I share METAPOST vardefs over multiple pages?

[Gerben Wierda]

Thank you. And if I want these in a separate file, what is the correct way to include them?

> On 13 Mar 2020, at 13:24, Taco Hoekwater <taco@elvenkind.com> wrote:
> 
> Hi,
> 
> 
> 
>> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
>> 
>> Suppose I have this code:
>> 
>> 
>> Can I reuse that varied across follow-up MPPages?
> 
> Sure, put the vardef inside \startMPinclusions:
> 
> \startMPinclusions
> vardef MyShape(expr w, h) =
>   ...
> enddef ;
> \stopMPinclusions
> \startMPpage
> picture s ; s := MyShape(4cm, 2cm);
> 
> draw s;
> . . .
> \stopMPpage
> 
> \startMPpage
> picture s ; s := MyShape(8cm, 4cm);
> 
> draw s;
> . . .
> \stopMPpage
> 
> 
> Taco
> 
> ___________________________________________________________________________________
> 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
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> ___________________________________________________________________________________

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Re: Can I share METAPOST vardefs over multiple pages?

[Hans Hagen]

On 3/13/2020 2:33 PM, Aditya Mahajan wrote:
> On Fri, 13 Mar 2020, Taco Hoekwater wrote:
> 
>> Hi,
>>
>>
>>
>>> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
>>>
>>> Suppose I have this code:
>>>
>>>
>>> Can I reuse that varied across follow-up MPPages?
>>
>> Sure, put the vardef inside \startMPinclusions:
> 
> or \startMPdefinitions ... \stopMPdefinitions (don't remember what is 
> the difference between inclusions and definitions, now).
definitions: once
inclusions : every time

-----------------------------------------------------------------
                                           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: Can I share METAPOST vardefs over multiple pages?

[Gerben Wierda]

> On 13 Mar 2020, at 14:59, Hans Hagen <j.hagen@xs4all.nl> wrote:
> 
> On 3/13/2020 2:33 PM, Aditya Mahajan wrote:
>> On Fri, 13 Mar 2020, Taco Hoekwater wrote:
>>> Hi,
>>> 
>>> 
>>> 
>>>> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
>>>> 
>>>> Suppose I have this code:
>>>> 
>>>> 
>>>> Can I reuse that varied across follow-up MPPages?
>>> 
>>> Sure, put the vardef inside \startMPinclusions:
>> or \startMPdefinitions ... \stopMPdefinitions (don't remember what is the difference between inclusions and definitions, now).
> definitions: once
> inclusions : every time

That is not quite clear to me (ambiguous because of a lack of experience).

Does ‘once’ mean, valid in just one page or valid in all following pages?

G

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Re: Can I share METAPOST vardefs over multiple pages?

[Gerben Wierda]

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This worked when I was just doing METAPOST. Now, I am using my lua code to produce the METAPOST code that produces the pictures. And the picture itself is put in a file for METAPOST as follows:

File test4-mplib-run-001.mp:

% begin graphic: n=0

; beginfig(1) ; defaultfont:="name:dejavuserif*default"; CurrentLayout:="article"; def OverlayLineColor=black enddef; def OverlayColor =black enddef; ;picture pic; x:=80.000; y:=200.000; w:=133.000; h:=53.000;pic := ApplicationComponentLogo( w, h, typeString) shifted (x, -y); draw pic;picture pic; x:=273.000; y:=253.000; w:=133.000; h:=53.000;pic := Function( w, h, typeString) shifted (x, -y); draw pic;picture pic; x:=380.000; y:=133.000; w:=133.000; h:=53.000;pic := Service( w, h, typeString) shifted (x, -y); draw pic;path p; p := (200.000,-227.000)--(333.000,-227.000)--(333.000,-273.000); draw p;path p; p := (393.000,-253.000)--(393.000,-180.000); draw p;;; endfig ;
% end graphic

This apparently is tried to get run through METAPOST separately and that clearly doesn’t work, because ApplicationComponentLogo isn’t defined. This is the result of the following setup:

\starttext
\startMPdefinitions (or inclusions, no difference)
% ApplicationComponentLogo is defined here with a vardef
\stopMPdefinitions
\ctxlua{foo(“filename”)} 	% produces a series of
				%    context.startMPpage { instance = "doublefun” }
				%    several of:
				%	context( METAPOST statements in a string)
				%    context.stopMPpage()
\stoptext

How do I get my MPdefinitions available in those METAPOST runs?

G

> On 13 Mar 2020, at 14:59, Hans Hagen <j.hagen@xs4all.nl> wrote:
> 
> On 3/13/2020 2:33 PM, Aditya Mahajan wrote:
>> On Fri, 13 Mar 2020, Taco Hoekwater wrote:
>>> Hi,
>>> 
>>> 
>>> 
>>>> On 13 Mar 2020, at 12:53, Gerben Wierda <Gerben.Wierda@rna.nl> wrote:
>>>> 
>>>> Suppose I have this code:
>>>> 
>>>> 
>>>> Can I reuse that varied across follow-up MPPages?
>>> 
>>> Sure, put the vardef inside \startMPinclusions:
>> or \startMPdefinitions ... \stopMPdefinitions (don't remember what is the difference between inclusions and definitions, now).
> definitions: once
> inclusions : every time
> 
> -----------------------------------------------------------------
>                                          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
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> wiki     : http://contextgarden.net
> ___________________________________________________________________________________


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Re: Can I share METAPOST vardefs over multiple pages?

[Aditya Mahajan]

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On Mon, 16 Mar 2020, Gerben Wierda wrote:

> This worked when I was just doing METAPOST. Now, I am using my lua code to produce the METAPOST code that produces the pictures. And the picture itself is put in a file for METAPOST as follows:
>
> File test4-mplib-run-001.mp:
>
> % begin graphic: n=0
>
> ; beginfig(1) ; defaultfont:="name:dejavuserif*default"; CurrentLayout:="article"; def OverlayLineColor=black enddef; def OverlayColor =black enddef; ;picture pic; x:=80.000; y:=200.000; w:=133.000; h:=53.000;pic := ApplicationComponentLogo( w, h, typeString) shifted (x, -y); draw pic;picture pic; x:=273.000; y:=253.000; w:=133.000; h:=53.000;pic := Function( w, h, typeString) shifted (x, -y); draw pic;picture pic; x:=380.000; y:=133.000; w:=133.000; h:=53.000;pic := Service( w, h, typeString) shifted (x, -y); draw pic;path p; p := (200.000,-227.000)--(333.000,-227.000)--(333.000,-273.000); draw p;path p; p := (393.000,-253.000)--(393.000,-180.000); draw p;;; endfig ;
> % end graphic
>
> This apparently is tried to get run through METAPOST separately and that clearly doesn’t work, because ApplicationComponentLogo isn’t defined. This is the result of the following setup:
>
> \starttext
> \startMPdefinitions (or inclusions, no difference)
> % ApplicationComponentLogo is defined here with a vardef
> \stopMPdefinitions
> \ctxlua{foo(“filename”)} 	% produces a series of
> 				%    context.startMPpage { instance = "doublefun” }
> 				%    several of:
> 				%	context( METAPOST statements in a string)
> 				%    context.stopMPpage()
> \stoptext
>
> How do I get my MPdefinitions available in those METAPOST runs?

Since you are using \startMPpage[instace=doublefun], you need to do the 
definitions for doublefun instance: so use

\startMPdefinitions{doublefun}
...
\stopMPdefinitions

Aditya

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