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On 1/16/2017 8:31 PM, Sergey Slyusarev wrote:
the (subtle) difference between the two [*MPinclusions and */MPinitializations/] is not a bug but a feature
If I understood correctly, *MPinitializations affects everything and can't be assigned to a specific instance (or can it?), in some cases (like mine) this difference is not so subtle.
Look at the following example (not so minimal):
\startMPinitializations
picture p;
p := image(
draw fullsquare scaled 1cm;
draw textext("1");
);
\stopMPinitializations
\startMPinitializations
picture s;
s := image(
draw (fullsquare rotated 45) scaled 1cm;
draw textext("2");
);
\stopMPinitializations
\defineMPinstance[foo][initializations=yes]
\startMPcode{foo}
picture q;
q := image(
draw fullcircle scaled 1cm;
draw textext("3");
);
draw q;
\stopMPcode
\startMPcode{foo}
draw p;
draw q shifted (2cm, 0);
draw s shifted (4cm, 0);
\stopMPcode
\defineMPinstance[bar][initializations=yes]
\startMPcode{bar}
picture r;
r := image(
draw fullcircle scaled 1cm;
draw textext("4");
);
draw r;
\stopMPcode
\startMPcode{bar}
draw p;
draw r shifted (2cm, 0);
draw s shifted (4cm, 0);
\stopMPcode
First, it shows why *MPinitializations can't replace *MPinclusions for me (it affects all instances),
and second, it silently produces produces some really unexpected results:
It looks like it should produce (by line)
A circle with "3" inside (yes)
A square with "1" inside (yes); A circle with "3" inside again (no, instead it produces circle with "2" inside); A rhombus with "2" inside (no, instead it produces a rhombus with "1")
and so on.
(tested on http://live.contextgarden.net/)
In fact, I failed to declare picture variable inside with text inside one *MPcode environment and pass it to another safely
(text either disappears or changes to other text, and this time ConTeXt returns no error), that surely is a bug?
no, it's the way it works ... but keep in mind that textexts are something bound to a specific code snippet so you can bets do something like this: \starttext \defineMPinstance[foo][definitions=yes] \defineMPinstance[bar][definitions=yes] \startMPdefinitions{foo} vardef p = image( draw fullsquare scaled 1cm; draw textext("1"); ) enddef ; \stopMPdefinitions \startMPdefinitions{bar} vardef p = image( draw (fullsquare rotated 45) scaled 1cm; draw textext("2"); ) enddef; \stopMPdefinitions \startMPcode{foo} draw p; draw image( draw fullcircle scaled 1cm; draw textext("3"); ); draw p; \stopMPcode \startMPcode{bar} draw p; draw image( draw fullcircle scaled 1cm; draw textext("4"); ); \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 -----------------------------------------------------------------