POV-Ray: Newsgroups: povray.animations: High speed / slow motion mixture?

POV-Ray : Newsgroups : povray.animations : High speed / slow motion mixture?		Server Time 5 Jul 2024 12:49:55 EDT (-0400)

From: Gleb
Subject: High speed / slow motion mixture?
Date: 20 Nov 2002 16:34:03
Message: <3ddbffcb@news.povray.org>

There are some tests of rotating fan blades,
nothing special, the same set of 45 frames of the fan
rotating with constant speed, only difference is in fps:

DivX5:
http://www.freelocus.com/ani/fan45frsDivX502.ZIP   (~106K)
http://www.freelocus.com/ani/fan90fpsDivX502.ZIP   (~106K)
http://www.freelocus.com/ani/fan180fpsDivX502.ZIP  (~106K)

and Mpeg1:
http://www.freelocus.com/ani/fan30fpsmpeg1.ZIP    (~325K)

Is there any easy/cheap way to mix high speed and slow motion
in the same scene?
Would it be better e.g. to render slow motion with normal frame rate,
while high speed events with higher(say, doubled) frame rate and then
average
pairs of the last?  Or are there other better solution(s)?

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From: Mike White
Subject: Re: High speed / slow motion mixture?
Date: 21 Nov 2002 14:01:03
Message: <3ddd2d6f$1@news.povray.org>

Gleb <gk### [at] freelocuscom> wrote in message news:3ddbffcb@news.povray.org...
> There are some tests of rotating fan blades,
> nothing special, the same set of 45 frames of the fan
> rotating with constant speed, only difference is in fps:
>
> DivX5:
> http://www.freelocus.com/ani/fan45frsDivX502.ZIP   (~106K)
> http://www.freelocus.com/ani/fan90fpsDivX502.ZIP   (~106K)
> http://www.freelocus.com/ani/fan180fpsDivX502.ZIP  (~106K)
>
> and Mpeg1:
> http://www.freelocus.com/ani/fan30fpsmpeg1.ZIP    (~325K)
>
> Is there any easy/cheap way to mix high speed and slow motion
> in the same scene?
> Would it be better e.g. to render slow motion with normal frame rate,
> while high speed events with higher(say, doubled) frame rate and then
> average
> pairs of the last?  Or are there other better solution(s)?
>

Do you wish to show 3 blades at the same time, each rotating at a different
rate?

Or do you wish to show one blade that changes it's rate of rotation?

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From: Gleb
Subject: Re: High speed / slow motion mixture?
Date: 22 Nov 2002 02:43:16
Message: <3ddde014@news.povray.org>

"Mike White" <mik### [at] mindspringcom>:

> Do you wish to show 3 blades at the same time, each rotating at a
different
> rate?
> Or do you wish to show one blade that changes it's rate of rotation?
>
Sounds like a nice joke to me,  let me some time to think about it :)
Seriously, when we look at a rotating fan, at some rate the only a blurred
(semitransparent) spot can be seen instead of individual blades.
The goal is to get a bit more realism for animated fan, imho
it would be a useful addition to the popular cloth/water + wind modelling.

Gleb

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From: hughes, b
Subject: Re: High speed / slow motion mixture?
Date: 22 Nov 2002 03:16:23
Message: <3ddde7d7$1@news.povray.org>

"Gleb" <gk### [at] freelocuscom> wrote in message news:3ddde014@news.povray.org...
> Seriously, when we look at a rotating fan, at some rate the only a blurred
> (semitransparent) spot can be seen instead of individual blades.
> The goal is to get a bit more realism for animated fan, imho
> it would be a useful addition to the popular cloth/water + wind modelling.

There is, if using MegaPOV and its motion blur feature. I don't think you
could ever get a blending of the fan blades by high speed of animation
frames alone.

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