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Hello...
I've been trying to develop some characters and have run into a
block....
I need a way to create (or fake) semi-realistic, long, flowing hair...
furry animals... facial hair, etc... (essential elements of wizard
stories!)
Does anyone have advice on how this can be done, particularly with the
possibility
of later animation in mind? I'm not necessarily going for
photorealism...
Prez Midnite............... out.
pre### [at] hotmail com
http://westwood.fortunecity.com/sander/73/index.html
"The Constitution admittedly has a few defects and blemishes,
but it still seems a hell of a lot better than the system we have now."
-- Robert Anton Wilson
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Prez Midnite wrote:
>
> Hello...
>
> I've been trying to develop some characters and have run into a
> block....
>
> I need a way to create (or fake) semi-realistic, long, flowing hair...
> furry animals... facial hair, etc... (essential elements of wizard
> stories!)
>
> Does anyone have advice on how this can be done, particularly with the
> possibility
> of later animation in mind? I'm not necessarily going for
> photorealism...
>
> Prez Midnite............... out.
> pre### [at] hotmailcom
> http://westwood.fortunecity.com/sander/73/index.html
> "The Constitution admittedly has a few defects and blemishes,
> but it still seems a hell of a lot better than the system we have now."
> -- Robert Anton Wilson
heh, notice how no one touched on this one.. ;) Fur/Hair/etc is pretty
tough to do, and making it animate is even harder.. One idea that had
come to mind was to use the object bender and write a program to say how
much each strand of hair/fur should bend at a given moment. It would be
pretty complex, but not as bad as if you were trying to use balastic
motion equations or anything. Animals will be even tougher, I was
thinking of attempting a kitten for my next irtc entry, but I really
don't know if I'll have time to work on it. Good luck, it won't be
easy, but if you put enough study into it you might be able to get
satisfactory results. Just remember that the guys at pixar that got
paid the most were the ones who figured out how to do the fur movement
on the dog in Toy Story, so if you can't get it, don't feel too bad. :)
Nite_Hawk
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On Sat, 14 Nov 1998 08:24:29 -0600, Mark Nelson <nel### [at] tcumnedu>
wrote:
>One idea that had
>come to mind was to use the object bender and write a program to say how
>much each strand of hair/fur should bend at a given moment.
Ouch! You don't like your computer, do you? Far better to use
something like my torusspline; object bender makes huge, complex
CSGs that are terrible overkill for a simple strand of hair.
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Still, trying to model every strand of hair separately is a definite indication
that you have been raytracing too long (courtesy of twysted.net).
I guess if youre VERY good with media, you could achieve something with that.
Not quite realistic, but a general approximation. I saw sth. like that in
binaries.images some time ago.
Just an idea...
Btw. there is a 3DSMax plugin - Hair&Fur or something - that does hair (motion
and everything). Any ideas as to how this is done?
Margus
Ronald L. Parker wrote:
>
> On Sat, 14 Nov 1998 08:24:29 -0600, Mark Nelson <nel### [at] tcumnedu>
> wrote:
>
> >One idea that had
> >come to mind was to use the object bender and write a program to say how
> >much each strand of hair/fur should bend at a given moment.
>
> Ouch! You don't like your computer, do you? Far better to use
> something like my torusspline; object bender makes huge, complex
> CSGs that are terrible overkill for a simple strand of hair.
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Prez Midnite wrote:
>
> Hello...
>
> I've been trying to develop some characters and have run into a
> block....
>
> I need a way to create (or fake) semi-realistic, long, flowing hair...
> furry animals... facial hair, etc... (essential elements of wizard
> stories!)
>
> Does anyone have advice on how this can be done, particularly with the
> possibility
> of later animation in mind? I'm not necessarily going for
> photorealism...
Well. There is the obvious brute force way. If you're any good at
spline math etc, you could represet each hair strand as a curve. One xyz
fixed on the head, the other xyz dangling, obeying some simple momentum
(swaying). Optimize it down a lot... and write all the motion code in a
c precomputing proggie :) and it might be managable if you have a lot of
patience. ;)
One trick you might try would be to notice that most people's hair
obey's movement in groups called "locks of hair". This would be one
optimization. The idividual strands in locks move a jitter's worth
compared to the movement/distortion of the whole. Also locks are
composed of variable numbers of hair strands -- none are the same either
in strand termination length or component numbers. You could call it
"lock theory". :)
HMm. You could make use of color_map to suggest poor dye jobs or fraying
hair strands as well.
--min
--
Lewis A. Sellers: writer and contract Multimedia Website Developer
mailto:lse### [at] usitnet (The Fourth Millennium Foundation)
http://www.public.usit.net/lsellers/ & http://www.intrafoundation.com
http://brain-of-pooh.tech-soft.com/users/critters/bios/sellers_lewis.html
You can bug the living bejesus out of me live on ICQ @ 491461
(If I don't get back to you within a month, I'm out of prozac in some
dark corner somewhere screaming things quite unintelligable but -- most
curiously -- thick with a sumerian accent.)
"The comedy is over" -i pagliacci
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Mark Nelson wrote:
>
> Prez Midnite wrote:
[snip]
> > I need a way to create (or fake) semi-realistic, long, flowing hair...
> > furry animals... facial hair, etc... (essential elements of wizard
> > stories!)
> >
> > Does anyone have advice on how this can be done, particularly with the
> > possibility
> > of later animation in mind? I'm not necessarily going for
> > photorealism...
[snip]
> heh, notice how no one touched on this one.. ;) Fur/Hair/etc is pretty
> tough to do, and making it animate is even harder.. One idea that had
> come to mind was to use the object bender and write a program to say how
> much each strand of hair/fur should bend at a given moment. It would be
> pretty complex, but not as bad as if you were trying to use balastic
> motion equations or anything. Animals will be even tougher, I was
> thinking of attempting a kitten for my next irtc entry, but I really
> don't know if I'll have time to work on it. Good luck, it won't be
> easy, but if you put enough study into it you might be able to get
> satisfactory results. Just remember that the guys at pixar that got
> paid the most were the ones who figured out how to do the fur movement
> on the dog in Toy Story, so if you can't get it, don't feel too bad. :)
> Nite_Hawk
One thing that my (limited) experience with ray-tracing has done for me
is that I can really appreciate cool CGI work on TV and the Movies.
Freeze-frame on the ads for "Mighty Joe Young" for some excellent fur
textures.
On the other hand, you can also spot shortcomings in some work - "Hey,
those characters aren't casting shadows... that's not a real reflection,
it's just a reflection map... That characters hips look like they're
duct-taped to a SteadiCam, they don't roll at all when they walk..."
etc.
-jr-
**********************************************
* Delete "spamBgone." to get my real address *
**********************************************
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