bug: colors in TikZ/ConTeXt MKIV

bug: colors in TikZ/ConTeXt MKIV

[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
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Re: bug: colors in TikZ/ConTeXt MKIV

[Vedran Miletić]

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2010/11/26 Mojca Miklavec <mojca.miklavec.lists@gmail.com>

> 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

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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

On 27-11-2010 12:04, Vedran Miletić wrote:
> 2010/11/26 Mojca Miklavec<mojca.miklavec.lists@gmail.com>
>
>> 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


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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___________________________________________________________________________________

Re: bug: colors in TikZ/ConTeXt MKIV

[Mojca Miklavec]

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
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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

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

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                                              | www.pragma-pod.nl
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Re: bug: colors in TikZ/ConTeXt MKIV

[Michael Murphy]

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 <michael.murphy@uni-ulm.de>

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

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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

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

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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Re: bug: colors in TikZ/ConTeXt MKIV

[Michael Murphy]

> 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

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Re: bug: colors in TikZ/ConTeXt MKIV

[Wolfgang Schuster]

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

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Re: bug: colors in TikZ/ConTeXt MKIV

[Aditya Mahajan]

On Wed, Dec 1, 2010 at 7:58 AM, Hans Hagen <pragma@wxs.nl> 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
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Re: bug: colors in TikZ/ConTeXt MKIV

[Alan BRASLAU]

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
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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

On 2-12-2010 5:02, Aditya Mahajan wrote:
> On Wed, Dec 1, 2010 at 7:58 AM, Hans Hagen<pragma@wxs.nl>  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.

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                                           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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Re: bug: colors in TikZ/ConTeXt MKIV

[Aditya Mahajan]

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<pragma@wxs.nl>  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
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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

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

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                                           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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Re: bug: colors in TikZ/ConTeXt MKIV

[Hans Hagen]

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

> 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

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                                           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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