bug: colors in TikZ/ConTeXt MKIV

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Mojca Miklavec

26 Nov 2010 26 Nov '10

10:24 p.m.

Dear Till/Christian/Hans, The following is broken in ConTeXt MKIV (assuming the usage of patched TikZ to allow running it under MKIV at all), but works fine in ConTeXt MKII: \usemodule[tikz] \starttext \starttikzpicture \node[circle,ball color=red!10] (a) at (0,0,0) {$p_x$}; \stoptikzpicture \stoptext Mojca

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Vedran Miletić

27 Nov 27 Nov

11:04 a.m.

2010/11/26 Mojca Miklavec

...

Dear Till/Christian/Hans,

The following is broken in ConTeXt MKIV (assuming the usage of patched TikZ to allow running it under MKIV at all), but works fine in ConTeXt MKII:

\usemodule[tikz] \starttext

\starttikzpicture \node[circle,ball color=red!10] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

\stoptext

Mojca

Same here. Regards, Vedran Miletić

Hans Hagen

12:29 p.m.

On 27-11-2010 12:04, Vedran Miletić wrote:

...

2010/11/26 Mojca Miklavec

...
Dear Till/Christian/Hans,

The following is broken in ConTeXt MKIV (assuming the usage of patched TikZ to allow running it under MKIV at all), but works fine in ConTeXt MKII:

\usemodule[tikz] \starttext

\starttikzpicture \node[circle,ball color=red!10] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

\stoptext

Mojca

Same here.

\starttikzpicture \node[circle,ball color=darkred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture \starttikzpicture \node[circle,ball color=red] (a) at (0,0,0) {$p_x$}; \stoptikzpicture \definecolor[myred][r=.1] \starttikzpicture \node[circle,ball color=myred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Mojca Miklavec

1:16 p.m.

On Sat, Nov 27, 2010 at 13:29, Hans Hagen wrote:

...

\starttikzpicture \node[circle,ball color=darkred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

I made a workaround in that way, but it's still a bug ... Mojca

Hans Hagen

1:25 p.m.

On 27-11-2010 2:16, Mojca Miklavec wrote:

...

On Sat, Nov 27, 2010 at 13:29, Hans Hagen wrote:

...
\starttikzpicture \node[circle,ball color=darkred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

I made a workaround in that way, but it's still a bug ...

I have no clue what the ! does apart from defining a color red at 10% but I do know that context ignores it. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Michael Murphy

1 Dec 1 Dec

12:36 p.m.

On Sat, 2010-11-27 at 14:25 +0100, Hans Hagen wrote:

...

On 27-11-2010 2:16, Mojca Miklavec wrote:

...
On Sat, Nov 27, 2010 at 13:29, Hans Hagen wrote:

...
\starttikzpicture \node[circle,ball color=darkred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

I made a workaround in that way, but it's still a bug ...

I have no clue what the ! does apart from defining a color red at 10% but I do know that context ignores it.

Hans

The '!' is actually pretty neat, since it allows you to blend colors. By default, tikz blends colors with white, so red!10 means mix 10% red with 90% white. This has the advantage that I can take any color, say \definecolor[mycolor][r=0.42,g=1.,b=0.2] and lighten it 50% by just using mycolor!50 I can also blend two colors together, using colorA!50!colorB I'm also pretty sure that context didn't always ignore the exclamation mark. Is there a way to reverse this behaviour? PS I've tried using spot colors in context, but that doesn't seem to work: \definespotcolor[mycolor][red][p=.1] -- Michael Murphy MPhys Institute für Quanteninformationsverarbeitung Room N25/4409 Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland tel +49 731 50 22824 fax +49 731 50 22839 www.uni-ulm.de/nawi/nawi-qiv.html

Hans Hagen

12:58 p.m.

On 1-12-2010 1:36, Michael Murphy wrote:

...

On Sat, 2010-11-27 at 14:25 +0100, Hans Hagen wrote:

...
On 27-11-2010 2:16, Mojca Miklavec wrote:

...
On Sat, Nov 27, 2010 at 13:29, Hans Hagen wrote:

...
\starttikzpicture \node[circle,ball color=darkred] (a) at (0,0,0) {$p_x$}; \stoptikzpicture

I made a workaround in that way, but it's still a bug ...

I have no clue what the ! does apart from defining a color red at 10% but I do know that context ignores it.

Hans

The '!' is actually pretty neat, since it allows you to blend colors. By default, tikz blends colors with white, so

red!10

means mix 10% red with 90% white. This has the advantage that I can take any color, say

\definecolor[mycolor][r=0.42,g=1.,b=0.2]

and lighten it 50% by just using

mycolor!50

I can also blend two colors together, using

colorA!50!colorB

I'm also pretty sure that context didn't always ignore the exclamation mark. Is there a way to reverse this behaviour?

I'm pretty sure that I never implemented something using a questionmark. However, we do have: \definecolor[red-t] [r=1,t=0.5,a=1] \definecolor[green-t][g=1,t=0.5,a=1] \defineintermediatecolor[mycolora][0.5,red,green] \defineintermediatecolor[mycolorb][0.5,red-t,green-t] \starttext test {\mycolora OEPS} test test {\mycolorb OEPS} test \stoptext I could probably support \definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)] which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Michael Murphy

5:37 p.m.

...

I'm pretty sure that I never implemented something using a questionmark. However, we do have:

\definecolor[red-t] [r=1,t=0.5,a=1] \definecolor[green-t][g=1,t=0.5,a=1] \defineintermediatecolor[mycolora][0.5,red,green] \defineintermediatecolor[mycolorb][0.5,red-t,green-t]

\starttext test {\mycolora OEPS} test test {\mycolorb OEPS} test \stoptext

I could probably support

\definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)]

which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name.

OK, thanks. Last question then: is there a way to redefine standard colors? Something like: \redefinecolor[red][r=0,g=1,b=0] -- Michael Murphy

Wolfgang Schuster

5:42 p.m.

Am 01.12.2010 um 18:37 schrieb Michael Murphy:

...

OK, thanks. Last question then: is there a way to redefine standard colors? Something like:

\redefinecolor[red][r=0,g=1,b=0]

\starttext \definecolor[test][r=1]\color[test]{red?} \definecolor[test][g=1]\color[test]{red?} \definecolor[test][b=1]\color[test]{red?} \stoptext Wolfgang

Aditya Mahajan

2 Dec 2 Dec

4:02 a.m.

On Wed, Dec 1, 2010 at 7:58 AM, Hans Hagen wrote:

...

I could probably support

\definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)]

which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name.

That will be a nice feature to have (especially, if it can also be used with \definedcolor) Aditya

Hans Hagen

8:01 a.m.

On 2-12-2010 5:02, Aditya Mahajan wrote:

...

On Wed, Dec 1, 2010 at 7:58 AM, Hans Hagen wrote:

...
I could probably support

\definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)]

which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name.

That will be a nice feature to have (especially, if it can also be used with \definedcolor)

You mean \colored[0.5(red)] ? That works ok. ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Aditya Mahajan

11:01 a.m.

On Thu, 2 Dec 2010, Hans Hagen wrote:

...

On 2-12-2010 5:02, Aditya Mahajan wrote:

...
On Wed, Dec 1, 2010 at 7:58 AM, Hans Hagen wrote:

...
I could probably support

\definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)]

which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name.

That will be a nice feature to have (especially, if it can also be used with \definedcolor)

You mean \colored[0.5(red)] ? That works ok.

Indeed. That is what I meant. I did not know that the metapost like syntax worked for \colored. Aditya

Hans Hagen

11:04 a.m.

On 2-12-2010 12:01, Aditya Mahajan wrote:

...

Indeed. That is what I meant. I did not know that the metapost like syntax worked for \colored.

\colored is just a shortcut to \definecolor ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Alan BRASLAU

7:19 a.m.

On Wednesday 01 December 2010 13:58:23 Hans Hagen wrote:

...

I could probably support

\definecolor[xxx][0.5(red,green)] \definecolor[xxx][0.5(red)]

which looks better than this ! and is less likely to conflict with names as abc! is a rather value color name.

Indeed, a favorite color is "surprisepink!" \definecolor [roscolux51] [h=aaacd5] % Touch of color when white light is not desirable. \definecolor [surprisepink!] [roscolux51] The TiKz syntax "red!50!green" is short, sweet and rather strange. But the question remains on how to support full TiKz use under ConTeXt. In Metapost, we have 0.5[red,green] (does this work with colors?). Would \definecolor[xxx][0.5[red,green]] be a better alternative? Is such a syntax possible? Would this be readable? The next step would be to allow \color[0.5[red,green]] (or \color[0.5(red,green)]), i.e. such syntax wherever a color can be used. Alan

Hans Hagen

11:17 a.m.

On 2-12-2010 8:19, Alan BRASLAU wrote:

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The next step would be to allow \color[0.5[red,green]] (or \color[0.5(red,green)]), i.e. such syntax wherever a color can be used.

You can use \definecolor[mycolor][.5(red,green)] in the current beta, but I wonder if \color[0.5(red,green)] makes much sense as that would complicate (and definitely slow down) color switching. But, as Aditya pointer out you can use {\colored[0.5(green)]test} already. I don't want to get away too much from the principle of defining colors using names. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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participants (7)

Aditya Mahajan
Alan BRASLAU
Hans Hagen
Michael Murphy
Mojca Miklavec
Vedran Miletić
Wolfgang Schuster