From: Keith McKay via ntg-context <ntg-context@ntg.nl>
To: ntg-context@ntg.nl
Cc: Keith McKay <mckaymeister@gmail.com>
Subject: Problem with a defined colour in MetaFun
Date: Thu, 28 Apr 2022 11:05:18 +0100 [thread overview]
Message-ID: <3fc7c602-d9de-6b68-e771-240eebee4cb8@gmail.com> (raw)
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Hi,
In the MWE below I define an rgb colour, myColor1, using random numbers
for the r, g and b components. I then use it to fill a unitsquare the
size of the page, which works as expected. In the loop that follows I
then use the defined colour, myColor1, along with white and the variable
r to create shades of myColor1 as in the MWE below. However, myColor1 is
not recognised in the loop and seems to be replaced by black, although
if I use a predefined colour, in this case BurntSienna from the crayola
collection, it works as expected. I have tried a number of ways to get
this to work as shown in the code but without success. I would be
grateful for any suggestions.
Best Wishes
Keith McKay
%%%%%%%%%%%%%%%%%%%%MWE%%%%%%%%%%%%%
\setuppapersize[A4,portrait]
\usecolors[crayola]
\starttext
\dorecurse{10}{
\startMPpage
StartPage;
\definecolor[name="myColor1", r = uniformdeviate(1), g =
uniformdeviate(1), b = uniformdeviate(1) ] ;
fill unitsquare xscaled PaperWidth yscaled PaperHeight withcolor "myColor1";
for i =2 step 2 until 10:
r := i/10;
fill unitsquare xscaled 5cm yscaled .5cm shifted (1cm,i*cm)
withcolor(r[\MPcolor{BurntSienna},white]);
fill unitsquare xscaled 5cm yscaled .5cm shifted (7cm,i*cm)
withcolor(r[\MPcolor{myColor1}, white]);
fill unitsquare xscaled 5cm yscaled .5cm shifted (13cm,i*cm)
withcolor(r[\MPcolor{"myColor1"}, white]);
%fill unitsquare xscaled 5cm yscaled .5cm shifted (13cm,i*cm)
withcolor(r[myColor1 , white]); This line causes an error.
endfor;
StopPage;
\stopMPpage
}
\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%end MWE%%%%%%%%%%%
I am running:
system >
system > ConTeXt ver: 2022.04.20 19:18 LMTX fmt: 2022.4.26 int:
english/english
system >
system > 'cont-new.mkxl' loaded
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next reply other threads:[~2022-04-28 10:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-28 10:05 Keith McKay via ntg-context [this message]
2022-04-28 12:41 ` Fabrice L via ntg-context
2022-04-28 12:45 ` Fabrice L via ntg-context
2022-04-29 13:19 ` Keith McKay via ntg-context
2022-04-28 15:04 ` Wolfgang Schuster via ntg-context
2022-04-29 13:19 ` Keith McKay via ntg-context
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