I've seen very little activity in this newsgroup lately. I recall that
Thanksgiving is celebrated around this dates... maybe most people went to
celebrate.

Anyway, I'm still playing with these quasi-fluids, and thought you may want
to see some of my latest failures :)

If you haven't noticed, the particles never stop going up: still higher than
their initial heights! :D

Good luck,

Fernando.

Post a reply to this message

Attachments:
Download 'bounce8.m1v.mpg' (495 KB)

> 
> I've seen very little activity in this newsgroup lately. I recall that
> Thanksgiving is celebrated around this dates... maybe most people went to
> celebrate.
> 
> Anyway, I'm still playing with these quasi-fluids, and thought you may want
> to see some of my latest failures :)
> 
> If you haven't noticed, the particles never stop going up: still higher than
> their initial heights! :D

What is strange is that they all go to the right, I would have expected
some to also go to the left...
I get the gravity orientation from the direction of the initial fall,
hence I conclude that the recipient was symmetrical and horizontal,
so why does the fluid do not escape also from the left ?

Post a reply to this message

news:3BF### [at] atosorigincom...

> >
> > I've seen very little activity in this newsgroup lately. I recall that
> > Thanksgiving is celebrated around this dates... maybe most people went
to
> > celebrate.
> >
> > Anyway, I'm still playing with these quasi-fluids, and thought you may
want
> > to see some of my latest failures :)
> >
> > If you haven't noticed, the particles never stop going up: still higher
than
> > their initial heights! :D
>
> What is strange is that they all go to the right, I would have expected
> some to also go to the left...
> I get the gravity orientation from the direction of the initial fall,
> hence I conclude that the recipient was symmetrical and horizontal,
> so why does the fluid do not escape also from the left ?



I really don't know for sure! I think the problem is rooted in the function
that returns the new direction of the particle after it has collided with
the surface. I believe it is ignoring the effects of gravity.

Perhaps I'm going to recode everything from scratch, but in C, because
Matlab is a bit too slow, specially because I'm thinking in adding
interaction between particles, and that adds a lot of complexity to the
algorithm. However, I going to miss Matlab's matrices and vectors.

Merci pour votre commentaires!

Fernando.

Post a reply to this message

>

> news:3BF### [at] atosorigincom...
> >
> > What is strange is that they all go to the right, I would have expected
> > some to also go to the left...
> > I get the gravity orientation from the direction of the initial fall,
> > hence I conclude that the recipient was symmetrical and horizontal,
> > so why does the fluid do not escape also from the left ?
>

>
> I really don't know for sure! I think the problem is rooted in the
function
> that returns the new direction of the particle after it has collided with
> the surface. I believe it is ignoring the effects of gravity.

It seems to me that the particles landing on the left side of the bowl would
naturally be mostly deflected to the right side.

>
> Perhaps I'm going to recode everything from scratch, but in C, because
> Matlab is a bit too slow, specially because I'm thinking in adding
> interaction between particles, and that adds a lot of complexity to the
> algorithm. However, I going to miss Matlab's matrices and vectors.

Good luck.
I have some vector and matrix code in C from when I wrote a simple
ray-tracer a few years ago.  It may not be "plug-and-play", but if you
would like a copy of it, let me know.

Tom Bates.

Post a reply to this message

"Tom Bates" <tho### [at] shawca> wrote in message
news:3bfd2b5e$1@news.povray.org...

> Good luck.
> I have some vector and matrix code in C from when I wrote a simple
> ray-tracer a few years ago.  It may not be "plug-and-play", but if you
> would like a copy of it, let me know.
>
> Tom Bates.

Thanks Tom, but I'll already managed to code everything in C. I had to
search for my C book (Kernighan/Ritchie) because I can't believe I've
forgotten so much of C! That happens for using too much Matlab :)

Thanks again,

Fernando.

Post a reply to this message