POV-Ray : Newsgroups : povray.binaries.animations : Totally messed cloth sim (Divx) Server Time
19 Jul 2024 19:23:11 EDT (-0400)
  Totally messed cloth sim (Divx) (Message 1 to 6 of 6)  
From: Kevin Loney
Subject: Totally messed cloth sim (Divx)
Date: 2 Mar 2002 14:48:18
Message: <3c812c82@news.povray.org>
I have no clue whats wrong, but I have a few ideas.

--
Kevin
http://www.geocities.com/qsquared_1999/


Post a reply to this message


Attachments:
Download 'Cloth-DivX.avi.dat' (312 KB)

From: Rick [Kitty5]
Subject: Re: Totally messed cloth sim (Divx)
Date: 2 Mar 2002 19:20:56
Message: <3c816c68$2@news.povray.org>
> I have no clue whats wrong, but I have a few ideas.

you need to reduce the dynamite factor somewhat




--

Rick

Kitty5 WebDesign - http://Kitty5.com
POV-Ray News & Resources - http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037

PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA


Post a reply to this message

From: Martin Magnusson
Subject: Re: Totally messed cloth sim (Divx)
Date: 2 Mar 2002 20:02:45
Message: <3c817635@news.povray.org>
> I have no clue whats wrong, but I have a few ideas.
 What kind of cloth model are you using? Springs? If yes, you're going to
have to use really small time steps and/or less stiff springs.

/ Martin


Post a reply to this message

From: Peter Popov
Subject: Re: Totally messed cloth sim (Divx)
Date: 3 Mar 2002 02:46:46
Message: <k0l38u03r01sk7abe0vkrq6f5u01j7i2vf@4ax.com>
On Sat, 2 Mar 2002 12:42:42 -0700, "Kevin Loney" <klo### [at] pt2mcom>
wrote:

>I have no clue whats wrong, but I have a few ideas.

Typical forward Euler instability. Reduce the integration step, soften
the springs and increase damping, in that order.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg


Post a reply to this message

From: Apache
Subject: Re: Totally messed cloth sim (Divx)
Date: 4 Mar 2002 12:12:27
Message: <3c83aafb@news.povray.org>
If you like the 'rubbery' behaviour, softening the springs is cool. But if
you don't like the rubber sheet effect, you'll have to use VERY SMALL
integration/time steps (especially with forward euler) and very stiff
springs.

--
Apache
http://geitenkaas.dns2go.com/experiments/
apa### [at] yahoocom


Post a reply to this message

From: Peter Popov
Subject: Re: Totally messed cloth sim (Divx)
Date: 5 Mar 2002 01:25:53
Message: <nnl78ucoemru8a3fffidia1o8mdabvmcle@4ax.com>
On Mon, 4 Mar 2002 18:35:27 +0100, "Apache"
<apa### [at] yahoocom> wrote:

>If you like the 'rubbery' behaviour, softening the springs is cool. But if
>you don't like the rubber sheet effect, you'll have to use VERY SMALL
>integration/time steps (especially with forward euler) and very stiff
>springs.

This is not a solution as the forward Euler becomes unstable with the
number of steps, too. I've had a perfectly settled system (i.e. in
static balance) explode in just a few dozen iterations. You have to
use a converging method, and the forward Euler is not one.

Sorry to be the bringer of bad news... please spare me :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.