Re: [Algorithms] Automatic Texture Atlas generation

[Emanuele S. <in...@fo...>]

I'd suggest Seamster:

http://graphics.cs.uiuc.edu/~jch/papers/seamster.pdf

together with a good parametrization algorithm (suggested in the paper) =
you get as little seams as possible - continuous mapping.
Apparently works on any mesh topology according to Sheffer ... not only =
characters as shown.

Would love to see a plugin for any 3D package based on Seamster...big =
deal! ;)


For the lighting... my 2c:
yes...mixing direct realtime lighting and lightmaps can work =
great...can't show screenshots at this time though.
The big issue here is... if you're talking environments graphics... =
radiosity solution needs to take account for direct-light casted =
shadows. (otherwise you just get some ambient-like radiosity... which is =
worth practically nothing ^_^ )

So, for instance, you can't move the sunlight (the one you used to =
compute lightmaps) this way...
If instead...you just want to add moving lights and shadows on =
environments...works perfect. (i.e. a torch on a moon-lit wall - moon =
light not moving)

Summary:
Global lights stay still...other lights...whatever. ;)



Best,


Emanuele Salvucci
Maya|Lightwave
Game Technical Artist
Lscript developer

www.forwardgames.com
ema...@fo...

"#3. He causes things to look different so it would appear time has =
passed."

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----- Original Message -----=20
From: Ale...@sc...=20
To: gda...@li...=20
Sent: Tuesday, August 17, 2004 5:31 PM
Subject: [Algorithms] Automatic Texture Atlas generation



Hi,=20

Does anyone know if the Least Square Conformal Mapping method is good =
enough to compute a texture atlas for global illumination given=20
a typical next gen game level, or is something more advanced needed? =
(essentially I wonder if warps in the mapping might cause significant=20
disparity in light map resolution)=20

Before I re-invent the wheel, does anyone know if there is source code =
avaliable for any of the atlas generation methods?=20

One other thing, has anyone tried using standard dynamic lights/shadows =
for the first bounce of a light together with a pre-computed=20
radiosity solution for the second and subsequent bounces?  If so what =
where the results like?=20

Thanks,=20

Alex Clarke

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