Jan Barglowski (jan++at++archimedes.vislab.navy.mil)
Thu, 26 Mar 1998 08:43:23 -0800 (PST)
After working with cliptexures for a week or so, I have a few
questions I can't seem to find a good answer for:
1) I'd really like to have some control over how the detail in
the mipmaps I see. It seems the biasS and biasT controls in
clipfly will degrade the mipmap levels, but they won't sharpen
it!
2) The cliptexture is always centered on my terrain directly below
me. Unfortunately, my flight sim doesn't fly looking down
(for long!) -- it looks pretty much ahead. So I see about
half of the highest detail mipmap when I'd really like to see
more. This would, I'd guess, require the centering algorithm
to take direction into account. Since the texture loading already
does this, is there any alternate centering function that can
shift the clipcenter "in front" of me? Or would this be an
exercise left to the reader ;-)
3) Currently, I see an abrupt change in mipmap levels on my clipmapped
terrain. Playing with all the clipfly controls, I can lessen
this distinction only by causing blurring. What I'd really like
is to "push" my highest detail mipmap border further away from the
eyepoint to make the change less apparent. How can I do this?
4) Lastly, are there any docs detailing the relationship between
clipsize, tilesize, icache size, LODbias, and min/maxLOD (did I
forget any parameters?) and the sharpness of the clipmap?
I can accept the "default" settings I use for performance reasons,
but I sure would like to know that I can control the clipmapping
for better image quality *if* I have the time to do it.
Thanks for any insight!
jan
--
Jan Anthony Barglowski jan++at++chinalake.navy.mil
Real-time Computer Graphics http://www1.ridgecrest.ca.us/~jan
Naval Air Warfare Center, China Lake (760) 927-1057
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This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:57:05 PDT