Re: [NTG-context] transparent colors
On 5/19/2016 10:35 PM, Meer, Hans van der wrote:
With \definecolor[colorname][r=,g=,b=] one defines a color of name "colorname"
for use in ConTeXt and in Metapost.
A transparentcolor comes with \definecolor[transparentcolorname][r=,g=,b=,a=,t=]
Problem: how to define a transparent color with
\definetransparentcolor[#1][#2][#3]{...}.
To be called for example as \definetransparentcolor[transparentcolorname][colorname][0.5]
for color "colorname" with transparency 0.5.
I tried to do this by intercepting from \definecolor the vales "r=,g=,b=" in a
macro \colornamergb to be called as \csname..\endcsname for the varying colorname and
feeding that to a definecolor-variant. However, the parsing of r=,g=,b= then goes wrong
(\futurelet balking).
Question: is there a direct way to derive a transparent colorvariant from a
parent one without transparency? The usefulness of this comes from the fact
that for things like \definecolor[lighthoneydew][r=.894117,g=.95,b=.894117] the
numbers need not be feed more than once.
\starttext
\definespotcolor[redA][red][p=1]
\definespotcolor[redB][red][p=.5]
\definespotcolor[redC][redB][t=.5,a=1]
\definespotcolor[redD][redA][t=.25,a=1]
\redA test
\redB test
\redC test
\redD test
\stoptext
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.com | 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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
[NTG-context] transparent colors
With \definecolor[colorname][r=,g=,b=] one defines a color of name "colorname"
for use in ConTeXt and in Metapost.
A transparentcolor comes with \definecolor[transparentcolorname][r=,g=,b=,a=,t=]
Problem: how to define a transparent color with
\definetransparentcolor[#1][#2][#3]{...}.
To be called for example as
\definetransparentcolor[transparentcolorname][colorname][0.5] for color
"colorname" with transparency 0.5.
I tried to do this by intercepting from \definecolor the vales "r=,g=,b=" in a
macro \colornamergb to be called as \csname..\endcsname for the varying
colorname and feeding that to a definecolor-variant. However, the parsing of
r=,g=,b= then goes wrong (\futurelet balking).
Question: is there a direct way to derive a transparent colorvariant from a
parent one without transparency? The usefulness of this comes from the fact
that for things like \definecolor[lighthoneydew][r=.894117,g=.95,b=.894117] the
numbers need not be feed more than once.
Hans van der Meer
___
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
[NTG-context] transparent colors in latest beta
Hi Hans,
the bad news is that transparent colors don't work at all in the latest
beta with mkiv (they worked on and off with the beta before that). The
good
news is that this makes it easier to build a minimal example :-) Here
comes:
\setupcolors[state=start]
\starttext
\startuseMPgraphic{test}
pair a, b, c, d ;
a = (0,0) ; b = (0,5cm) ; c = (5cm,5cm) ; d = (5cm,0) ;
path p ; p = a -- b -- c -- d -- cycle ;
draw a -- c withcolor black ;
fill p withcolor transparent (1,0.25,red) ;
\stopuseMPgraphic
\useMPgraphic{test}
\stoptext
All best
Thomas
___
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://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] transparent colors in latest beta
Thomas A. Schmitz wrote:
Hi Hans,
the bad news is that transparent colors don't work at all in the latest
beta with mkiv (they worked on and off with the beta before that). The good
news is that this makes it easier to build a minimal example :-) Here
comes:
\setupcolors[state=start]
\starttext
\startuseMPgraphic{test}
pair a, b, c, d ;
a = (0,0) ; b = (0,5cm) ; c = (5cm,5cm) ; d = (5cm,0) ;
path p ; p = a -- b -- c -- d -- cycle ;
draw a -- c withcolor black ;
fill p withcolor transparent (1,0.25,red) ;
\stopuseMPgraphic
\useMPgraphic{test}
\stoptext
has to do with a confused page state (side effect of new numbering code)
you can try the beta (maybe other bugs were introduced now)
Hans
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| 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://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] transparent colors in latest beta
Thomas A. Schmitz wrote:
On Apr 15, 2009, at 11:46 AM, Hans Hagen wrote:
has to do with a confused page state (side effect of new numbering code)
you can try the beta (maybe other bugs were introduced now)
Yes, looks like a file was forgotten:
I can't find file `trac-lmx.tex'.
to be read again
\relax
l.77 \loadmkivfile{trac-lmx.tex}
ah, indeed some reshuffing of code ... new beta in 10 min
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| 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://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] transparent colors in latest beta
On Apr 15, 2009, at 11:46 AM, Hans Hagen wrote:
has to do with a confused page state (side effect of new numbering
code)
you can try the beta (maybe other bugs were introduced now)
Yes, looks like a file was forgotten:
I can't find file `trac-lmx.tex'.
to be read again
\relax
l.77 \loadmkivfile{trac-lmx.tex}
All best
Thomas
___
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://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] transparent colors in latest beta
On Apr 15, 2009, at 12:15 PM, Hans Hagen wrote: ah, indeed some reshuffing of code ... new beta in 10 min Great, transparency now works in the 12:17 beta, thanks Hans! All best Thomas ___ 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://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
