My PhD work at INRIA (France), at
SYNTIM lab, about the marvelous volumetric textures (or texels ).
You can find here images, mpeg animations, my PhD thesis, and my publications.
If you are far from Europe,
here is a sample of the anims.
A small part of my
non-official work at INRIA (mostly in french).
You can find here my short stories, my 'best bugs' gallery, etc.
The
marvellous company where I was working before coming here at DGP,
and particularly its animation gallery .
My postdoctoral work about clouds ,
here at DGP .
Subsequent results .
Relative bibliography .
good jokes sciences related or not.
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Clouds qualitative simulation
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Beyond fluids local equations, that lead to costly 3D systems to solve,
physicists characterize several
structures at various scales
in fluids, and their interactions, such as
bubbles, jets, instabilities, waves, convective cells, vortices, etc.
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The idea is to use directly this knowledge to generate convective phenomena,
like
cumulus clouds and billowing smoke are.
This allowes to separate the scales:
larges bubbles account for large range air motion,
while waves and vortices lying on a bubble surfaces are just
locally advected.
- We indeed work on several scales:
ground air layer, heaten by the sun, producing bubbles (thermals) on hot spots.
bubble rising, up to the dew point where it becomes visible.
bubbles birth and movment inside the cloud, up to the border.
waves, degenerating into vortices, on the top of emerging bubbles,
advected along the surface.
advecting subvortices on the vortices, etc.
advected texture figuring the smaller scales.
- You wonder what is the relation with texels ? There is one. Both a texel and a bubble (primitive to be rendered in both case) introduce complexity in a scene by providing a `dressing' of large simple shapes...
- We indeed work on several scales:
Results
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Early results (see the EWAS'97 paper):
Large scale: cumulus cloud growing (by showing bubbles envelope)
Small scale: convecting bubbles (to be connected to the previous model).
Animated bubble (to be seen at high speed ! colors are for tests.)( images and animations are copyrighted: no public use is allowed without author autorization. )
Bibliography
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Personal Publications
- Texels : check my
INRIA home page.
Clouds :
EWAS'97 firsts steps for a multiscale model.
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Related Publications
- Texels : check my
INRIA home page.
Clouds :
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phenomenes meteorologiques
meteo-france
the marvellous
Jos Stam work on fire, clouds, wind, caustics, etc...
- (a link to follow from Canada to France , then to Finland ...)
Gardner: textured ellipsoids
- (Siggraph 84 pp11-20, Siggraph 85 pp297-303, ...)
Musgrave's work about
clouds
and
explosions
clouds volumetric rendering: a lot !
fluid mecanic: a lot !
wind: few.
fluid with particle systems: severals.
hyper-deformable surface by oriented particles: some.
- E.g.: JC. Lombardo PhD.
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New adress in FRANCE: Email : Fabrice.Neyret@imag.fr
Contact
-
The idea is to use directly this knowledge to generate convective phenomena,
like
cumulus clouds and billowing smoke are.
This allowes to separate the scales:
larges bubbles account for large range air motion,
while waves and vortices lying on a bubble surfaces are just
locally advected.
I now work at
iMAGIS, Grenoble, FRANCE.
(new stuff there!)