* colors in MetaPost
@ 2019-09-11 11:46 Henning Hraban Ramm
2019-09-11 12:18 ` Henning Hraban Ramm
0 siblings, 1 reply; 3+ messages in thread
From: Henning Hraban Ramm @ 2019-09-11 11:46 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi,
I’m trying to get a linear shade in the background of my presentation.
But it seems like MetaPost can’t handle my self-defined colors:
\definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
\definecolor[VerlaufNach][c=88,m=95,y=5,k=60]
\startuniqueMPgraphic{Verlauf}
% old method, also doesn’t work
% path p ;
% p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
% linear_shade(p,6,\MPcolor{VerlaufVon},\MPcolor{VerlaufNach}) ;
fill fullsquare xyscaled (\overlaywidth,\overlayheight)
withshademethod "linear"
withshadevector (0.5,2.5)
%withshadedirection shadedup
withshadecolors ("VerlaufVon", "VerlaufNach")
;
\stopuniqueMPgraphic
\defineoverlay[verlaufen][\useMPgraphic{Verlauf}]
\setupbackgrounds[paper][background={verlaufen}]
\starttext
\strut
\stoptext
The background consists of a blue and a green area instead of a shade. While testing I sometimes got a few more stripes in the top and bottom area, can’t reproduce any more.
I also tried RGB and hex (HTML) definitions. Predefined colors work.
According to the MetaFun manual, either \MPcolor{name} or just "name" should work.
What’s wrong?
Greetlings, Hraban
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: colors in MetaPost
2019-09-11 11:46 colors in MetaPost Henning Hraban Ramm
@ 2019-09-11 12:18 ` Henning Hraban Ramm
2019-09-11 12:31 ` Hans Hagen
0 siblings, 1 reply; 3+ messages in thread
From: Henning Hraban Ramm @ 2019-09-11 12:18 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 2019-09-11 um 13:46 schrieb Henning Hraban Ramm <texml@fiee.net>:
> \definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
> \definecolor[VerlaufNach][c=88,m=95,y=5,k=60]
Of course I need values between 0 and 1.
Sorry for the noise.
I think I’m too tired...
Greetlings, Hraban
---
https://www.fiee.net
http://wiki.contextgarden.net
https://www.dreiviertelhaus.de
GPG Key ID 1C9B22FD
___________________________________________________________________________________
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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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: colors in MetaPost
2019-09-11 12:18 ` Henning Hraban Ramm
@ 2019-09-11 12:31 ` Hans Hagen
0 siblings, 0 replies; 3+ messages in thread
From: Hans Hagen @ 2019-09-11 12:31 UTC (permalink / raw)
To: Henning Hraban Ramm, mailing list for ConTeXt users
On 9/11/2019 2:18 PM, Henning Hraban Ramm wrote:
> Am 2019-09-11 um 13:46 schrieb Henning Hraban Ramm <texml@fiee.net>:
>> \definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
>> \definecolor[VerlaufNach][c=88,m=95,y=5,k=60]
>
> Of course I need values between 0 and 1.
> Sorry for the noise.
> I think I’m too tired...
there is an alternative interface on top of the existing one (coming) ...
% maybe handy:
definecolor [ name = "MyColor3", r = 0.22, g = 0.44, b = 0.66 ] ;
definecolor [ name = "MyColor4", r = 0.66, g = 0.44, b = 0.22 ] ;
% parameter driven:
draw lmt_shade [
path = fullcircle scaled 4cm,
direction = "right",
domain = { 0, 2 },
colors = { "MyColor3", "MyColor4" },
] ;
but tweaking shades will never be easy
Hans
(working in the metafun xl manual, more soon)
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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2019-09-11 12:31 ` Hans Hagen
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