POV-Ray : Newsgroups : povray.general : Help on blobs: speediest way for opening? Server Time
2 Nov 2024 00:23:05 EDT (-0400)
  Help on blobs: speediest way for opening? (Message 1 to 8 of 8)  
From: Greg M  Johnson
Subject: Help on blobs: speediest way for opening?
Date: 5 Apr 2000 13:17:16
Message: <38EB7419.51B18DD8@my-dejanews.com>
I have developed a blob figure of a human.  I made a mouth by flattening
a sphere and giving it a big negative strength.

The problem is that this technique gives a ridiculously long render
time.  Most of the render time is spent on the mouth, where perhpaps a
dozen components (spheres) overlap.

What is the quickest-rendering ways to make a simple mouth on a blob
character?
a) negative blob components?
b) CSG?
c) Make a different-textured region show up (and is there a quick way to
do this)?
d) ?


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From: Ken
Subject: Re: Help on blobs: speediest way for opening?
Date: 5 Apr 2000 16:04:01
Message: <38EB9BA6.FE8D6181@pacbell.net>
"Greg M. Johnson" wrote:

> What is the quickest-rendering ways to make a simple mouth on a blob
> character?
> a) negative blob components?
> b) CSG?
> c) Make a different-textured region show up (and is there a quick way to
> do this)?

 d) H.E. Day uses manual bounding in all of his major Blob projects
    to help speed up rendering.

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


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From: Greg M  Johnson
Subject: Re: Help on blobs: speediest way for opening?
Date: 5 Apr 2000 16:38:29
Message: <38EBA340.DB6AE935@my-dejanews.com>
What the heck is that?

I've tried code like this before ages ago and gotten insulting messages from
pov that say things like:
  "I removed your unnecessary bounding box."
  "I removed your unnecessary bounding box."
  "I removed your unnecessary bounding box."

If you're familiar with the concept, what would I bound and with what:
    a) spheres just barely larger than every one of my 150+ components?
    b) a big cube larger than the arms will ever reach?

?

Ken wrote:

> "Greg M. Johnson" wrote:
>
> > What is the quickest-rendering ways to make a simple mouth on a blob
> > character?
> > a) negative blob components?
> > b) CSG?
> > c) Make a different-textured region show up (and is there a quick way to
> > do this)?
>
>  d) H.E. Day uses manual bounding in all of his major Blob projects
>     to help speed up rendering.
>
> --
> Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


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From: Ken
Subject: Re: Help on blobs: speediest way for opening?
Date: 5 Apr 2000 21:34:59
Message: <38EBE915.966CC9C2@pacbell.net>
"Greg M. Johnson" wrote:
> 
> What the heck is that?
> 
> I've tried code like this before ages ago and gotten insulting messages from
> pov that say things like:
>   "I removed your unnecessary bounding box."

You will have to use a switch -MB to turn automatic bounding off. If
you don't POV-Ray will ignore your attempts at manual bounding and
supply it's own which are not always optimized in complex operations.

> If you're familiar with the concept, what would I bound and with what:
>     a) spheres just barely larger than every one of my 150+ components?
>     b) a big cube larger than the arms will ever reach?

I would be lying if I said I knew what the optimum scenario is or which
method Mr. Day uses. Since he is the recognized blob master around here
you might wish to ask him yourself - Pov### [at] aolcom

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


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From: Margus Ramst
Subject: Re: Help on blobs: speediest way for opening?
Date: 6 Apr 2000 17:23:11
Message: <38ECF290.3A82ED49@peak.edu.ee>
Ken wrote:
> 
> You will have to use a switch -MB to turn automatic bounding off.

Actually, I'd use the -UR switch to disable unnecessary bounds removal (which is
what the 'insulting message' is referring to). If you use -MB you either have to
bound each and every object manually or suffer a severe speed penalty.

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg


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From: Greg M  Johnson
Subject: Re: Help on blobs: speediest way for opening?
Date: 6 Apr 2000 17:37:56
Message: <38ED02A0.389A5673@my-dejanews.com>
And for us mortals using Win98, how are the equivalents of these switches being
done?

Margus Ramst wrote:

> Ken wrote:
> >
> > You will have to use a switch -MB to turn automatic bounding off.
>
> Actually, I'd use the -UR switch to disable unnecessary bounds removal (which is
> what the 'insulting message' is referring to). If you use -MB you either have to
> bound each and every object manually or suffer a severe speed penalty.
>
> --
> Margus Ramst
>
> Personal e-mail: mar### [at] peakeduee
> TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg


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From: Margus Ramst
Subject: Re: Help on blobs: speediest way for opening?
Date: 6 Apr 2000 17:46:21
Message: <38ECF7FD.BF320AF5@peak.edu.ee>
"Greg M. Johnson" wrote:
> 
> And for us mortals using Win98, how are the equivalents of these switches being
> done?
> 

Well, you can give command-line switches in the Windows version, too - from the
'Ini' button menu.
The equivalent ini options are:

Bounding=on/off equals +/-MB
Remove_Bounds=on/off equals +/-UR

See also the documentation about automatic bounding control.

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg


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From: Frits van Bommel
Subject: Re: Help on blobs: speediest way for opening?
Date: 3 Jul 2000 08:55:19
Message: <39608d37$1@news.povray.org>
Margus Ramst <mar### [at] peakeduee> schreef in berichtnieuws
38ECF7FD.BF320AF5@peak.edu.ee...
> "Greg M. Johnson" wrote:
> >
> > And for us mortals using Win98, how are the equivalents of these
switches being
> > done?
> >
>
> Well, you can give command-line switches in the Windows version, too -
from the
> 'Ini' button menu.
> The equivalent ini options are:
>
> Bounding=on/off equals +/-MB
> Remove_Bounds=on/off equals +/-UR
<snip>

Or, you could press Alt-C and put them in the text box labeled command line
options. This way you don't have to switch to the INI to start a render.

--
     Frits van Bommel

"In the beginning the Universe was created. This has
made a lot of people very angry and been widely
regarded as a bad move."


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