Re: Transparency (Metapost)

[Fabrice Couvreur <fabrice1.couvreur@gmail.com>]

[-- Attachment #1.1: Type: text/plain, Size: 4594 bytes --]

Hi Hans,
I updated lmtx, but your code does not compile except that the output is a
pdf file where it is written ERROR.
Fabrice

tex error       > tex error on line 1 in file ./blond.tex: ?


\font_helpers_low_level_define ...\scaledfontmode
                                                  \relax \ifcase
\scaledfont...
\font_helpers_trigger_define ..._identifier_class
                                                  \csname
\v_font_identifier...
\applyfontclassstrategies ...to_size \lastnamedcs
                                                  \else \expandafter
\font_h...
\font_helpers_synchronize_font ...classstrategies
                                                  \fi \setfalse
\c_font_auto...
\rm ->\ifmmode \mathrm \else \normalrm
                                       \fi
\font_basics_switch_style ...dcsname \lastnamedcs
                                                  \edef \fontstyle
{#1}\ifmm...
...
l.1 \starttext


 1 >>  \starttext
 2
 3     \startMPcode
 4         defaultfont  := "texgyrepagella-regular*default" ;
 5         defaultscale := 0.8 ;
 6
 7         definecolor [ name = "mp:red",   b = 1 ] ;
 8         definecolor [ name = "mp:green", y = 1 ] ;
 9
10         path twos, threes ;
11         twos   := fullcircle xscaled 4cm yscaled 2cm rotated 180 shifted
42

mtx-context     | fatal error: return code: 256

Le dim. 1 déc. 2019 à 13:09, Hans Hagen <j.hagen@xs4all.nl> a écrit :

> On 12/1/2019 11:32 AM, Fabrice Couvreur wrote:
> > Hello
> > Thank you for your suggestion. However, it works with context and not
> > with lmtx.
> > Fabrice
> >
> > \starttext
> > \startMPcode
> >     defaultfont := "texgyrepagella-regular*default" ;
> >     defaultscale :=0.8;
> >
> >     color brown;
> >     brown = (0.128,0.00,0.00);
> >
> >     path twos, threes, sixes;
> >     twos = fullcircle xscaled 4cm yscaled 2cm rotated 180
> >            shifted 42 left;
> >     threes = fullcircle xscaled 4cm yscaled 2cm shifted 42 right;
> >     sixes = buildcycle(twos, threes);
> >
> >     fill twos   withcolor brown withtransparency(1,0.75);
> >     fill threes withcolor yellow withtransparency(1,0.75);
> >     fill sixes withcolor yellow + brown withtransparency(1,0.75);
> >
> >     draw twos;
> >     draw threes;
> >
> >     label("...",(1.5cm,0));
> >     label("...",(0,0));
> >     label("...",(-1.5cm,0));
> >     label.top("yeux marron",(-1.5cm,1.25cm));
> >     label.top("cheveux blonds",(1.5cm,1.25cm));
> > \stopMPcode
> > \stoptext
> >
> > tex error       > tex error on line 1 in file ./blond.tex: ?
> Looks ok here ... but isn't the transparacy used instead of the sizes?
> Anyway, you can use named colors
>
> \starttext
>
> \startMPcode
>     defaultfont  := "texgyrepagella-regular*default" ;
>     defaultscale := 0.8 ;
>
>     definecolor [ name = "mp:red",   b = 1 ] ;
>     definecolor [ name = "mp:green", y = 1 ] ;
>
>     path twos, threes ;
>     twos   := fullcircle xscaled 4cm yscaled 2cm rotated 180 shifted 42
> left ;
>     threes := fullcircle xscaled 4cm yscaled 2cm             shifted 42
> right ;
>
>     fill twos   withcolor "mp:red"   withtransparency(1,0.5) ;
>     fill threes withcolor "mp:green" withtransparency(1,0.5) ;
>
>     draw twos ;
>     draw threes ;
>
>     label("...",( 1.5cm,0));
>     label("...",( 0,    0));
>     label("...",(-1.5cm,0));
>     label.top("\strut yeux marron",   (-1.5cm,1.25cm));
>     label.top("\strut cheveux blonds",( 1.5cm,1.25cm));
> \stopMPcode
>
> \stoptext
>
> (you cannot overload colors at the tex level in mp but use them in order
> to be consistent)
>
> 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
>
> ___________________________________________________________________________________
>

[-- Attachment #1.2: Type: text/html, Size: 6808 bytes --]

[-- Attachment #2: Type: text/plain, Size: 493 bytes --]

___________________________________________________________________________________
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
___________________________________________________________________________________