Um, hello, sir. I notice you use the name "Tony B". Due to the fact that
I've been on these groups since 1998, and this is the first time I've seen
you around, I would like to politely request that you come up with a
slightly different name so people don't confuse us. For a moment, I thought
I'd checked the newsgroups in my sleep and replied to this animation and
didn't remember a thing! :)

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Hi "Tony[B]" <ben### [at] catholicorg>, you wrote in message:
3c49a714@news.povray.org...
> Um, hello, sir. I notice you use the name "Tony B". Due to the fact that
> I've been on these groups since 1998, and this is the first time I've seen
> you around, I would like to politely request that you come up with a
> slightly different name so people don't confuse us. For a moment, I thought
> I'd checked the newsgroups in my sleep and replied to this animation and
> didn't remember a thing! :)

RTFM:
section 6.2.2.3:  "Identifier Name Collisions".

;-D


--
#local j=text{ttf"arial""JRG".2,0}#local J=0;#while(J<10)#local R=0;#while
(R<2)#local G=0;#while(G<1)#if(inside(j<R,G.1>))object{j scale.025translate
<R-1G-J/20J/-40+2>pigment{rgb<9J>}}#debug"O"#else#debug" "#end#local G=G+
.025;#end#local R=R+.05;#debug"\n"#end#local J=J+1;#end// JRG

Home: http://digilander.iol.it/jrgpov  //New: Kitchen scene WIP

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I would have expected it to fold over on itself and stay folded (but not
tightly) in its resting position.

I laid down a face-cloth and folded over the corner to visualize what I was
thinking.

--
Tom Bates
#macro T(B)#local m=mod(B,8);#local B=floor(B/8);m#end#local
C=126981491245202;#
local D=115694168992822;sphere_sweep{b_spline 16#local
i=0;#while(i<16)<T(C)-4,T
(D)-4,10-i/10>.1#local i=i+1;#end pigment{rgb 1}}light_source{-10,1}// Tom
Bates

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It looks like it's afraid to fall onto itself, like it's repelling itself or
something.

- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]

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> Well... I must get some sleep because tomorrow I have to wake up early.
But
> I'll be very happy to receive your comments and suggestions,

*g* I know this problem ;-)

It looks like the cloth gets "sucked" rather than "blown" underneath the
sphere.
Does your simulation take care abouth the thinckness of the cloth? It looks
like it is infintively thin?
regards
SY

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"KalleK" <kal### [at] gmxde> wrote in message news:3c4927ca$1@news.povray.org...
> > What do you think of this new stiffness? Maybe something intermediate
would
> > be much better, I think.
>
> I think it looks better now it's is not melting anymore but, but it should
> have at least some wrinkles in the end of the animation.
> Maybe another object - a little sphere/box, which rests under the cloth.
The
> cloth shouldn't be flat as a plane in the end, IMHO.
>
> cukk

Yes, as you said, the melting is gone, but it looks like an invisible iron
is desperately flattening the cloth!

I already fixed this, I think, because the last run looked very good...
however I mistakingly didn't make enough frames, so I didn't want to post
it. Now, I'm trying a bit more complex algorithm, but I f****d the code and
can't see where is the bug... argghhh...

But I'll post soon my latest results.

Thanks for your comments,

Fernando.

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"Rick [Kitty5]" <ric### [at] kitty5com> wrote in message
news:3c4953e1$1@news.povray.org...
> > I tried to simulate a stiffer cloth, but I believe this time it may have
> > been too stiff! I think everything goes well until the final frames, in
> > which the cloth sort of "springs" quickly, seemingly in order to extend
> the
> > cloth as flat as possible and tries to go under the sphere... which
> > obviously does not happen with ordinary cloths!
> >
> > What do you think of this new stiffness? Maybe something intermediate
> would
> > be much better, I think.
>
> I think something closer to the wrinkly cloth would be better - this like
a
> sheet of rubber, while the other looked quite realistic IMO

Yes, I agree. I would also choose the other one. However I believe an
intermediate level of wrinkliness would look more natural. I'm working hard
in an alternate approach to the simulation and I'll post the results as soon
as they look good :)

Thanks for your comments,

Fernando.

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"Tony B" <ton### [at] sentienchomechoicecoyuk> wrote in message
news:3c49557b@news.povray.org...

> news:3c492407@news.povray.org...
> > I tried to simulate a stiffer cloth, but I believe this time it may have
> > been too stiff! I think everything goes well until the final frames, in
> > which the cloth sort of "springs" quickly, seemingly in order to extend
> the
> > cloth as flat as possible and tries to go under the sphere... which
> > obviously does not happen with ordinary cloths!
>
> I like the 'spring'. I was going to comment on the previous version
because
> it looked like there was too much friction between the sphere and the
cloth
> as the cloth finally falls to the 'ground'
>
> Brilliant!!
>
> T

Thanks Tony! I also believe the other one looked like it had a lot of
friction. As I recall having posted in another reply, I think this is caused
because the sphere was "pushing" the cloth outwards, without really changing
the internal forces, and that's why it looked like it didn't want to fall
down. Now I've changed this, but I haven't been really able to see if it
fixed this particular phenomenon.

Thanks for your comments!

Fernando.

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"Tony[B]" <ben### [at] catholicorg> wrote in message
news:3c49a6a8@news.povray.org...
> It's getting better. Keep trying. You'll find the right mix of parameters
> eventually. :)

I hope so! The problem is that I've now messed up the code while trying to
add new features, so I really have a double problem: fix the current code
and then search for the right mix of parameters!!!

Thanks for your comments,

Fernando.

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"Tom Bates" <tho### [at] shawca> wrote in message
news:3c49d029$1@news.povray.org...
> I would have expected it to fold over on itself and stay folded (but not
> tightly) in its resting position.
>
> I laid down a face-cloth and folded over the corner to visualize what I
was
> thinking.

Hi Tom. I agree with you: it is an unnatural movement. I think it was caused
because I gave too much emphasis to the stiffness of the cloth. I'm now
experimenting with new settings to see if this gets fixed.

Thanks for your suggestions!

Fernando.

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