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From: JPGargoyle
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 18:51:13
Message: <3c4ca971$1@news.povray.org>
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WOW!
Really amazing :))
Best regards.
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From: Artis
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 20:20:28
Message: <3c4cbe5c@news.povray.org>
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What happened to the two middle wrinkles?
--
#local a=.1sphere_sweep{catmull_rom_spline 18<3,3>a<1,3>a<0,0>a<1,3>a,x*2a
y,a<2.5,1.5>a<3,3>a,x*3a<3,3>a<4.5,2>a<3,1>a,x*4.5a<5.5,3>a,x*6a<4.5,2.5>a
<7,3>a<8,3>a scale a translate<-.35,-a,1>}background{rgb 1} // Artis
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 22:17:32
Message: <3c4cd9cc@news.povray.org>
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"Rick [Kitty5]" <ric### [at] kitty5 com> wrote in message
news:3c4bf133@news.povray.org...
> > I discarded my "explicit velocity" idea, which didn't give anything
better
> > than a very energetic and vigorous sheet of rubber.
>
> booooo - if it wasn't for the energetic ending that was your best
Today I woke up with another idea, maybe I can recover what you liked from
that animation.
Thanks for your comments :)
Fernando.
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 22:17:45
Message: <3c4cd9d9@news.povray.org>
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"Thomas Lake" <tla### [at] homecom> wrote in message
news:3c4c1205@news.povray.org...
> If this cloth of yours infinetly thin in your simulation? Cause one of the
> problems with these animation has been that at the end the cloth seems to
> fall far too flat to me. During the animation you have a beautiful
> simulation, but at the end it comes to rest almost all in a plane.
Yes, I would like also to have some wrinkles at the end, but I still don't
know if the gravity is too strong.... or maybe there's too little friction
in the floor!!! let me try that...
Thank you, you've inspired a new idea. Let me see if it works.
Fernando.
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 22:17:52
Message: <3c4cd9e0@news.povray.org>
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"Jim Kress" <dea### [at] kressworkscom> wrote in message
news:3c4c67c9$1@news.povray.org...
> Why doesn't the sphere reflect the falling part of the cloth?
>
> Jim
If I'm not mistaken, I think the cloth is so thin and so close to the sphere
that the camera doesn't get any reflection from the cloth.
Fernando.
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 21 Jan 2002 22:18:11
Message: <3c4cd9f3@news.povray.org>
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"Artis" <art### [at] aaaapollolv> wrote in message
news:3c4cbe5c@news.povray.org...
> What happened to the two middle wrinkles?
I think that the mesh is not thin enough, and those wrinkles are not folding
very realistically... If I have enough time, I'll try to test with a finer
mesh to see if this gets fixed.
Fernando.
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 22 Jan 2002 01:59:22
Message: <3c4d0dca@news.povray.org>
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"JPGargoyle" <jpg### [at] clixpt> wrote in message
news:3c4ca971$1@news.povray.org...
> WOW!
>
> Really amazing :))
>
>
> Best regards.
Thanks!!! I'm very glad you liked it!
Fernando.
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From: Michael McKnight
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 22 Jan 2002 14:11:14
Message: <3c4db952$1@news.povray.org>
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i think you're right about the mesh - i looked at the anim full screened,
and i could really see the triangles popping out when the wrinkles got too
fine.
i'm eager to see your idea about retaining the good properties of the rubber
sheet.
news:3c4cd9f3@news.povray.org...
> "Artis" <art### [at] aaaapollolv> wrote in message
> news:3c4cbe5c@news.povray.org...
> > What happened to the two middle wrinkles?
>
> I think that the mesh is not thin enough, and those wrinkles are not
folding
> very realistically... If I have enough time, I'll try to test with a finer
> mesh to see if this gets fixed.
>
> Fernando.
>
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From: Martin Magnusson
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 26 Jan 2002 05:15:04
Message: <3c5281a8@news.povray.org>
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You definitely should read David Baraff's paper on cloth simulation. He
describes an algorithm that is both realistic, stable and reasonably fast,
and includes self-collisions. Look at
http://www-2.cs.cmu.edu/afs/cs/user/baraff/www/papers/
It's pretty heavy reading, but I think I have a pretty good idea of how it's
supposed to work. I haven't gotten my hands dirty and implemented it, but
I've thought about it for quite some time. So if there's something you
wonder about I'd be glad to try to help.
/ Martin Magnusson
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From: Fernando González del Cueto
Subject: Re: The cloth falls again on his friend, the chromed sphere (MPEG1)
Date: 27 Jan 2002 18:18:50
Message: <3c548ada@news.povray.org>
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Hi Martin,
I already had Baraff's "Large Steps in Cloth Simulation" paper, but I
definetely will give look at the other papers.
Thanks for your recommendation!
Fernando.
"Martin Magnusson" <lov### [at] frustratedhousewiveszzncom> wrote in message
news:3c5281a8@news.povray.org...
> You definitely should read David Baraff's paper on cloth simulation. He
> describes an algorithm that is both realistic, stable and reasonably fast,
> and includes self-collisions. Look at
> http://www-2.cs.cmu.edu/afs/cs/user/baraff/www/papers/
>
> It's pretty heavy reading, but I think I have a pretty good idea of how
it's
> supposed to work. I haven't gotten my hands dirty and implemented it, but
> I've thought about it for quite some time. So if there's something you
> wonder about I'd be glad to try to help.
>
> / Martin Magnusson
>
>
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