Groups > comp.graphics.algorithms > #912

Re: decorative random colors algorithm

From	JohnF <john@please.see.sig.for.email.com>
Newsgroups	comp.graphics.algorithms
Subject	Re: decorative random colors algorithm
Date	2012-07-03 10:27 +0000
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<jsuhe3$psm$1@reader1.panix.com> (permalink)
References	<jspf0f$moq$1@reader1.panix.com> <e184d664-6546-40fa-a99a-9254ac9a4b7e@googlegroups.com>

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gernot.hoffmann@hs-emden-leer.de wrote:
> John, thanks for the feedback.
No problem at all. Thanks so very much for
the information and advice to feedback on.

> Sorry I've lost the overview.
Also no problem.
The internet will keep it forever,
whether it's worth keeping or not.

> Also, too many questions!

Sorry about that. Since the last post,
I've settled by trial-and-error on what
seems to my eye like the best-looking ranges,
  0<=h<360,  0.1<=l<=0.5,  0.6<=s<=1.0
with values selected randomly by drand48()
within those ranges (I haven't tried your
prng algorithm yet).
Anyway, that's what looks best to me so far
(your kiolmeterage may vary).

You (and similarly "nobody@nowhere") were
right that the hls color model (about which
I knew nothing when first posting) is what's
needed to do this properly. And your hlstorgb
code in hlscone...pdf was by far the simplest
implementation of any I subsequently googled.
I'm surprised your algorithm doesn't seem to
have become the standard way to do it.

> Perhaps this Swatch Book can give you an impression about
> the relation between numbers and appearance, here - for RGB -
> only the last(!) page:
> http://www.fho-emden.de/~hoffmann/swatch22112002.pdf

Thanks, that looks great! And rather than the original
decorative.ps design I was looking at, I ran hls-parameter-range
tests against the design at http://www.forkosh.com/decorative0.ps
which displays the individual color lines better.
-- 
John Forkosh  ( mailto:  j@f.com  where j=john and f=forkosh )

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decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-01 12:15 +0000
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-01 07:59 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-02 07:58 +0000
      Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-02 12:29 +0000
  Re: decorative random colors algorithm Nobody <nobody@nowhere.com> - 2012-07-01 16:25 +0100
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-02 08:28 +0000
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-03 01:17 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-03 10:27 +0000
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-03 21:50 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 05:15 +0000
      Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 08:01 +0000
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-04 02:20 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 09:51 +0000
      Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 10:59 +0000
        Re: decorative random colors algorithm Wally W. <ww84wa@aim.com> - 2012-07-04 09:03 -0400
          Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 13:46 +0000
            Re: decorative random colors algorithm Wally W. <ww84wa@aim.com> - 2012-07-04 12:39 -0400
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-04 07:10 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-04 15:05 +0000
  Re: decorative random colors algorithm gernot.hoffmann@hs-emden-leer.de - 2012-07-04 09:12 -0700
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-05 03:18 +0000
      Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-05 05:54 +0000
        Re: decorative random colors algorithm John Forkosh <forkosh@panix.com> - 2012-07-05 12:23 +0000
  Re: decorative random colors algorithm "Skybuck Flying" <Windows7IsOK@DreamPC2006.com> - 2012-07-05 07:48 +0200
    Re: decorative random colors algorithm JohnF <john@please.see.sig.for.email.com> - 2012-07-05 06:14 +0000
    Re: decorative random colors algorithm Wally W. <ww84wa@aim.com> - 2012-07-05 07:30 -0400

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