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Groups > comp.lang.postscript > #1463

Re: Rainbow printing

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Op woensdag 17 jul 2013 01:34 CEST schreef John Deubert:

> On 2013-07-15 15:40:24 +0000, Cecil Westerhof said:
>
>> I would like to print things with a rainbow stripe. So the top
>> would be red, the bottom would be violet and the other colours
>> would be in between. Is it possible to do this?
>
> I'd be inclined to do this with a level 1 technique, using
> sethsbcolor:
>
> % ========== cut here =============
>
> /center { 300 400 } def
>
> /innerRadius 100 def
> /outerRadius 150 def
>
> /innerColor .8 def	% Purple, close enough
> /outerColor 0 def	% red
>
> /steps 100 def
>
> /deltaR outerRadius innerRadius sub steps div def
> /deltaColor outerColor innerColor sub steps div def
>
>
> /color innerColor def
> deltaR setlinewidth
>
> innerRadius deltaR outerRadius
> {
> 	center 3 -1 roll 0 180 arc
> 	color 1 1 sethsbcolor
> 	stroke
> 	/color color deltaColor add def
> } for
>
> showpage
>
> % ========== cut here =============

This draws an actual rainbow. Nice, but not what I meant. What I want:
I draw the word rainbow and the top of the word is red and the bottom
is violet and between the other colours are used.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-15 17:40 +0200
  Re: Rainbow printing abeddie <abeddie@hotmail.com> - 2013-07-15 09:54 -0700
    Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-15 20:56 +0200
      Re: Rainbow printing Mark Carroll <mtbc@bcs.org> - 2013-07-15 20:19 +0100
        Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-16 01:48 +0200
          Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-17 11:36 +0200
  Re: Rainbow printing Helge Blischke <h.blischke@acm.org> - 2013-07-15 18:56 +0200
  Re: Rainbow printing Michael Unger <spam.to.unger@spamgourmet.com> - 2013-07-15 19:06 +0200
    Re: Rainbow printing Michael Unger <spam.to.unger@spamgourmet.com> - 2013-07-15 22:07 +0200
  Re: Rainbow printing John Deubert <john@acumentraining.com> - 2013-07-16 16:34 -0700
    Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-17 09:10 +0200
  Re: Rainbow printing sjprouty3765@gmail.com - 2013-07-17 15:08 -0700
    Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-18 05:22 +0200
  Re: Rainbow printing luser- -droog <mijoryx@yahoo.com> - 2013-07-17 15:22 -0700
    Re: Rainbow printing luser- -droog <mijoryx@yahoo.com> - 2013-07-17 16:55 -0700
    Re: Rainbow printing Cecil Westerhof <Cecil@decebal.nl> - 2013-07-18 05:22 +0200

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