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Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you?

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On Friday, August 24, 2012 12:45:13 AM UTC-5, tlvp wrote:
> On Thu, 23 Aug 2012 13:00:15 -0700 (PDT), luser- -droog wrote:
> 
> 
> 
> > I've made a little progress here. It still generates the points
> 
> > with the O(n^3) brute force algorithm, but it saves the points
> 
> > to a data file called "stein.pts" so subsequent pages are much
> 
> > less agonizing.
> 
> 
> 
> Ah, yes, why carry out the same calculations at every re-run-through?
> 
>  
> 
> > Rotations and projections are applied to each point, and then
> 
> > it draws a little circle to represent the projected point.
> 
> > 
> 
> > %!
> 
> > % Point-field sampling
> 
> > % with data caching (in a file),
> 
> > % point-wise axial rotations,
> 
> > % and perspective projection. ...
> 
> 
> 
> Details suppressed in this reply, as I don't speak to them directly.
> 
> 
> 
> >  ...   showpage
> 
> > } for
> 
> 
> 
> That's neat, luser -drug, many thanks; and the rapid succession of images
> 
> helps fill in some details the imagination requires.
> 
> 
> 
> What are the chances, though, that, in each successive sweeping out of the
> 
> next image, the color used at each given moment can be somehow keyed to
> 
> that moment? By that I mean (dividing the time-parametrization interval for
> 
> each sweeping out into 4 main subintervals [0, 1/4], [1/4, .5], [.5, .3/4],
> 
> and [3/4, 1], to use the colors [rgb] = [FF, (4t)xFF, 0] for t in [0, 1/4],
> 
> the colors [rgb] = [(2 - 4t)xFF, FF, 0] for t in [1/4, .5],
> 
> the colors [rgb] = [0, FF, (4t - 2)xFF] for t in [.5, .3/4], and
> 
> thecolors [rgb] = [0, (4 - 4t]xFF, FF] for t in [3/4, 1],
> 
> thereby swooping through the visible spectrum from red = [FF 0 0] through
> 
> [FF FF 0] through green = [0 FF 0] through [0 FF FF] to blue = [0 0 FF] on
> 
> each "sweep".
> 
> 
> 
> I can't quite isolate that sweep-time parameter in your depiction of the
> 
> routine, or I'd try to see what that coloration-effect achieves, myself.
> 

Yeah, parametrization is the next step. 
And real matrix transformations.
Should be able to radically improve the speed
and clarity. I might scale it back to just 2 cylinders
until I get a better handle on it.

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ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-07-17 04:48 -0400
  Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-07-17 08:16 -0700
    Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-07-17 19:25 -0400
  Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-08-17 23:40 -0700
    Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-08-18 00:14 -0700
      Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-08-18 22:44 -0400
        Moire Madness! Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-08-23 13:00 -0700
          Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-08-24 01:45 -0400
            Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-08-24 01:49 -0400
            Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-08-23 23:11 -0700
              Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? luser- -droog <mijoryx@yahoo.com> - 2012-08-23 23:58 -0700
                Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-08-25 02:17 -0400
                Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? Luser droog <mijoryx@yahoo.com> - 2012-08-29 18:25 -0500
                Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? Luser droog <mijoryx@yahoo.com> - 2012-08-29 21:32 -0500
                Re: Moire Madness! Re: ping luser- -droog: SVG or PS project for you? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-08-30 05:26 -0400
                Hula-Hoop Hullaballoo! Re: ping luser- -droog: SVG or PS project for you? Luser droog <mijoryx@yahoo.com> - 2012-09-02 16:04 -0500
                Re: Hula-Hoop Hullaballoo! Re: ping luser- -droog: SVG or PS project for you? Luser droog <mijoryx@yahoo.com> - 2012-09-03 12:29 -0500
                Re: Hula-Hoop Hullaballoo! Re: ping luser- -droog: SVG or PS project for you? Luser droog <mijoryx@yahoo.com> - 2012-09-04 12:04 -0500
                Re: Hula-Hoop Hullaballoo! Re: ping luser- -droog: SVG or PS project for you? "M. Joshua Ryan" <mijoryx@yahoo.com> - 2012-09-04 12:49 -0500
                A shaded cylinder luser- -droog <mijoryx@yahoo.com> - 2012-09-04 18:11 -0700
                Re: A shaded cylinder luser- -droog <mijoryx@yahoo.com> - 2012-09-11 13:03 -0700
                Spinning Steinmertz Solid (approx.) luser- -droog <mijoryx@yahoo.com> - 2012-09-11 21:29 -0700
                Mulligan (again) luser- -droog <mijoryx@yahoo.com> - 2012-09-13 19:07 -0700
                Re: Mulligan (again) tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-09-14 05:05 -0400
                Heineken time "luser.droog" <luser.droog@gmail.com> - 2012-09-15 16:50 -0500
                Bigger and Badderer "luser.droog" <luser.droog@gmail.com> - 2012-09-16 23:33 -0500
                Re: Bigger and Badderer "luser.droog" <luser.droog@gmail.com> - 2012-09-16 23:37 -0500
                QapplaH! "luser.droog" <luser.droog@gmail.com> - 2012-09-17 11:34 -0500
                Re: QapplaH! (appendix: updated mat.ps) "luser.droog" <luser.droog@gmail.com> - 2012-09-17 13:05 -0500
                one more cup of coffee for the road. "luser.droog" <luser.droog@gmail.com> - 2012-09-18 02:51 -0500
                Re: Bigger and Badderer tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-09-18 21:52 -0400
                Re: Bigger and Badderer "luser.droog" <luser.droog@gmail.com> - 2012-09-18 22:30 -0500
                Re: Bigger and Badderer tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2012-09-19 00:59 -0400
                Re: Bigger and Badderer "luser.droog" <luser.droog@gmail.com> - 2012-09-19 00:48 -0500
                Revolving Camera prototype "luser.droog" <luser.droog@gmail.com> - 2012-09-23 22:30 -0500
                Steinmetz with Revolving Camera "luser.droog" <luser.droog@gmail.com> - 2012-09-24 09:30 -0500

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