how to include a circle with gradient fill?

how to include a circle with gradient fill?

[Uwe Koloska]

Hello all!

in de.comp.text.dtp someone posted a test for dtp programs.  They want to
compare the file size of the printing files.

One object that has to be placed on the page is a circle without a border
and with a gradient from white (center) to 100 % cyan.  Is there an easy
way to make this in context (maybe with the help of metapost)?

Thank you
Uwe

-- 
mailto:koloska@rcs.urz.tu-dresden.de
http://rcswww.urz.tu-dresden.de/~koloska/
--                                    --
right now the web page is in german only
but this will change as time goes by ;-)

Re: how to include a circle with gradient fill?

[Hans Hagen]

[-- Attachment #1: Type: text/plain, Size: 964 bytes --]

At 03:02 AM 8/17/00 +0200, Uwe Koloska wrote:
>Hello all!
>
>in de.comp.text.dtp someone posted a test for dtp programs.  They want to
>compare the file size of the printing files.
>
>One object that has to be placed on the page is a circle without a border
>and with a gradient from white (center) to 100 % cyan.  Is there an easy
>way to make this in context (maybe with the help of metapost)?

It happens to be possible using the following code:

% output=pdftex

\setuplayout[width=middle,height=middle]

\setupcolors[state=start]

\starttext

\startstandardmakeup

  \startMPcode
    numeric width ; width := \the\hsize ;
    numeric shade ; shade :=
      define_circular_shade (origin,origin,0,width,white,cyan) ;
    fill fullcircle scaled width withshade shade ;
  \stopMPcode

\stopstandardmakeup

\stoptext

Shading is present for some time, but the method presented here is only
availablein the beta version. [more on this in the metafun manual]

Hans

[-- Attachment #2: circle.pdf --]
[-- Type: application/pdf, Size: 1500 bytes --]

[-- Attachment #3: Type: text/plain, Size: 370 bytes --]

-------------------------------------------------------------------------
                                                  Hans Hagen | PRAGMA ADE
                      Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------

Re: how to include a circle with gradient fill?

[Uwe Koloska]

Hallo Hans!

Hartelijk bedankt voor uw meite!

You wrote on Mon, 21 Aug 2000:
>
>At 03:02 AM 8/17/00 +0200, Uwe Koloska wrote:
>>
>>One object that has to be placed on the page is a circle without a border
>>and with a gradient from white (center) to 100 % cyan.  Is there an easy
>>way to make this in context (maybe with the help of metapost)?
>
>It happens to be possible using the following code:
>
> [Code]
>
>Shading is present for some time, but the method presented here is only
>availablein the beta version. [more on this in the metafun manual]
>

Great!  Where is this marvellous metafun manual?

Now I only have to put this circle at an absolute position and set a box
with some text and then I can show the superior capability of TeX/ConTeXt.

Tot ziens!
Uwe Koloska

-- 
mailto:koloska@rcs.urz.tu-dresden.de
http://rcswww.urz.tu-dresden.de/~koloska/
--                                    --
right now the web page is in german only
but this will change as time goes by ;-)

Re: how to include a circle with gradient fill?

[Hans Hagen]

At 12:05 PM 8/22/00 +0200, Uwe Koloska wrote:

>Great!  Where is this marvellous metafun manual?

under construction [some 180 pages done now] but public soon

>Now I only have to put this circle at an absolute position and set a box
>with some text and then I can show the superior capability of TeX/ConTeXt.

What position? What text? I can define it for you.

groeten, 

Hans
-------------------------------------------------------------------------
                                                  Hans Hagen | PRAGMA ADE
                      Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------