Now I tried to experiment not just with air resistance, but with a bit of
wind. I didn't make the mesh very fine (just 25x25) so you may see some
strange dark triangles in the edges of the mesh. Next time I'll try to make
it finer, but the problem is basically that the complexity is quadratic, so
if I make it 50x50 it will take approximately 4 times longer to simulate!

I didn't time very accurately this simulation, but I think it took about 2
to 3 hours to simulate, and about 30 minutes to render. (250 frames approx).

It still doesn't have cloth-cloth collision detection.

I hope you'll like it and I'll be happy to receive any comment or
suggestion.

Fernando.

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Attachments:
Download 'newcloth27.m1v.mpg' (649 KB)

Wow.  That is one of the best ones I've seen as of yet..


news:3c6865a9@news.povray.org...
> Now I tried to experiment not just with air resistance, but with a bit of
> wind. I didn't make the mesh very fine (just 25x25) so you may see some
> strange dark triangles in the edges of the mesh. Next time I'll try to
make
> it finer, but the problem is basically that the complexity is quadratic,
so
> if I make it 50x50 it will take approximately 4 times longer to simulate!

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VERY cool!

The realism has increased dramatically!

I think this is the first time where the capabilities of your simulation
come out. I like this movie very much. Especially the part where the cloth
kicks the sphere's ass ;-) (if a sphere can have a thing like an ass)

Just one note:

change the texture of the cloth .. i still prefer the semi-transparent one
:-)))

Congratulations!

regards

SY

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Sweet... Me gusta...

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"Thomas Charron" <tch### [at] ductapenet> wrote in message
news:3c686c12$1@news.povray.org...
>     Wow.  That is one of the best ones I've seen as of yet..

Thanks Thomas!!!

I'm glad you liked it. I think that so many hours of work have finally begun
to pay off!!!

Fernando.

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Thanks! Actually I never thought the cloth would touch for a second time the
sphere, but I'm glad it did so!

I just changed the texture of the cloth, but I believe the MPEG compression
will not like it. Let me see if I can post it, and you'll tell me if you
like it better, ok?

Vielen Dank!

Fernando.


news:3c6942af@news.povray.org...
> VERY cool!
>
> The realism has increased dramatically!
>
> I think this is the first time where the capabilities of your simulation
> come out. I like this movie very much. Especially the part where the cloth
> kicks the sphere's ass ;-) (if a sphere can have a thing like an ass)
>
> Just one note:
>
> change the texture of the cloth .. i still prefer the semi-transparent one
> :-)))

Post a reply to this message

"Tony[B]" <ben### [at] catholicorg> wrote in message
news:3c694521@news.povray.org...
> Sweet... Me gusta...

Thanks!!!

Fernando.

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At first I'd like to make you a great compliment for this and the other
cloth animations. They really look great.

But something I'm missing in the behaviour of the cloth: It always looks
like a thin sheet of something like rubber. It has always the capability to
fold itself perfectly to the origin position. I think real cloth does not
behave like this. It doesn't have that much ripples and waves and it folds
slowlier.

I don't know if I expressed myself exactly enough. I mean theres something
like a minimal energy to fold two "cells" of cloth and a stronger damping on
the movement of the cloth is needed.

But that are just some suggestions of a unexpierenced "cloth" programmer.
You're work looks really great.

Yours sincerely

      Simon Meier

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news:3c69499a@news.povray.org...
> "Thomas Charron" <tch### [at] ductapenet> wrote in message
> news:3c686c12$1@news.povray.org...
> >     Wow.  That is one of the best ones I've seen as of yet..
> Thanks Thomas!!!
> I'm glad you liked it. I think that so many hours of work have finally
begun
> to pay off!!!

    DEFINATLY..  Now, when ya gonna share with the rest of the world?
*snickers*

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> I hope you'll like it and I'll be happy to receive any
> comment or suggestion.

Wow, this is really impressive!

I don't recall in what program you make the simulation. Ultimately I hope it
can be implemented in POV-Ray as a patch, if that isn't what you're already
doing.

Now, I know it's very ambiguous, but IMO to make the cloth simulations
really useful for a wide variety of animations, three things are needed:

* Any points on the cloth can be "control points", i.e. points that you can
control and attach to things in scene. For example, in this animation it
seemed like the two upper corners were control points, or maybe the entire
upper edge of the cloth (it was a bit difficult to see). But I hope it can
be possible to make any point a control point. This is probably not too
difficult; maybe your system can already do this.

* Collision detection with any object in POV-Ray. And the objects should be
described in normal POV-Ray syntax. This of course is only possible if the
cloth simulation is made as a patch. This would increase the possibilities a
lot!

* And the most difficult: Instead of the cloth always being a square piece,
it should be able to be any form. I don't just mean any flat form, but
really any form. The most extreme form of this would be if the simulation
could take any mesh as basis for the shape. I know it will be extremely
difficult creating a system that will automatically figure out where to
place all the strings, and just to keep track on them when there's no real
order in the grid. However, if this or something similar is done, the system
could be used to simulate real clothes. Clothes, and not cloth, is in my
opinion one of the ultimate goals for a simulation system like this.

I don't expect you to do any of this, it's just a few long-term visions that
I think could be cool... ;)

Rune
--
3D images and anims, include files, tutorials and more:
Rune's World:    http://rsj.mobilixnet.dk (updated Jan 20)
POV-Ray Users:   http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk

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