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From: GrimDude
Subject: Nested blur?
Date: 26 Jun 2000 05:35:26
Message: <395723de@news.povray.org>
Before I try this, is it possible to nest motion blur? I desire nesting
blurs, so that I can set a propellor into motion, snap a wing off my plane,
and then blur the resulting roll. Somehow, I don't think separate blurs
without the nesting operation, will bring about the desired result. Add to
that separate object blurs and chaos in motion and I will soon have one very
big headache to go along with the high render time.

Grim


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From: Nathan Kopp
Subject: Re: Nested blur?
Date: 26 Jun 2000 08:35:46
Message: <39574e22@news.povray.org>
GrimDude <vos### [at] yahoocom> wrote...
> Before I try this, is it possible to nest motion blur? I desire nesting
> blurs, so that I can set a propellor into motion, snap a wing off my
plane,
> and then blur the resulting roll. Somehow, I don't think separate blurs
> without the nesting operation, will bring about the desired result. Add to
> that separate object blurs and chaos in motion and I will soon have one
very
> big headache to go along with the high render time.

No, you cannot nest motion_blur objects.  You can, however, put all of you
action into one single motion blur object without much difficulty.

motion_blur{
  union{
    object{myObj1 rotate 0.5*x*clock} // myObj1 rotates
    object{myObj2 translate 0.5*y*clock } // myObj2 moves
    scale .1*clock // the whole union scales
  }
}

-Nathan


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From: GrimDude
Subject: Re: Nested blur?
Date: 26 Jun 2000 16:31:26
Message: <3957bd9e@news.povray.org>
Thank you, Nathan. :)

Grim


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From: Warp
Subject: Re: Nested blur?
Date: 27 Jun 2000 04:33:47
Message: <395866ea@news.povray.org>
Nathan Kopp <Nat### [at] koppcom> wrote:
: No, you cannot nest motion_blur objects.

  Should this option be supported?

  It can be sometimes useful. For example suppose that you #declare an
object which is motion blurred or which has motion blurred parts. Then you
use this identifier as part of a bigger object, which is then motion blurred
itself.

  Of course the render times will explode, but at least it would be
consistent with everything else.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/


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From: Nathan Kopp
Subject: Re: Nested blur?
Date: 27 Jun 2000 09:16:30
Message: <3958a92e$1@news.povray.org>
Warp <war### [at] tagpovrayorg> wrote...
> Nathan Kopp <Nat### [at] koppcom> wrote:
> : No, you cannot nest motion_blur objects.
>
>   Should this option be supported?

Probably.

>   Of course the render times will explode, but at least it would be
> consistent with everything else.

Render times wouldn't have to explode.  Instead, POV would just split apart
the child motion_blur object and put it into the various pieces of the
parent motion_blur, applying transformations and other modifications as
necessary.

-Nathan


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From: Warp
Subject: Re: Nested blur?
Date: 27 Jun 2000 12:11:23
Message: <3958d22b@news.povray.org>
Nathan Kopp <Nat### [at] koppcom> wrote:
: Render times wouldn't have to explode.  Instead, POV would just split apart
: the child motion_blur object and put it into the various pieces of the
: parent motion_blur, applying transformations and other modifications as
: necessary.

  So you mean that if the child motion blur created 10 objects and it's
unioned with a parent object which is motion-blurred with 10 objects, it
will not create 10*10 = 100 child objects but instead it will create 10
child objects with the combined transformation of the child object and
the parent object (matrix multiplication?).
  Yes, that would be a lot better and clever solution.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/


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From: GrimDude
Subject: Re: Nested blur?
Date: 28 Jun 2000 03:51:57
Message: <3959ae9d@news.povray.org>
I'm all for it! :)

Grim


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