Sectioning a texture?

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Jan A. Barglowski (jan++at++archimedes.chinalake.navy.mil)
Tue, 23 Aug 1994 13:33:41 -0700


Hello all!

I've built a rudimentary terrain builder, and I'm texturing it with a
scanned-in image of a map. The image file (rgb) is in one piece, but I've
implemented a terrain sectioning algorithm that breaks down the geometry
recursively and spatially, eg. 1 section into 4, then each of the 4 breaks
down, etc. I can map the texture vertices correctly on the sub-sections,
but the texture file is getting read for each piece, and fills up texture
memory with a lot of redundant imagery!

I've already tried making one big terrain, then using pfuBreakup on it, but
I need to have different LOD's.

Question is, how do I read only one copy of the texture, then split it up
somehow to cover the individual sub-sections? Only was I can figure so far
is to perform my own "Breakup" of the terrain.

Any help or ideas appreciated!

jan.

 Jan Anthony Barglowski Phone: (619) 927-1057
 Computer Dude Internet: jan++at++archimedes.nwc.navy.mil
 Visualization Lab Packet: SYSOP++at++WA6YBN.#SOCA.CA.US.NA
  Naval Air Warfare Center kc6uth++at++kc6uth.ampr.org
  -Weapons Division [44.17.2.6]


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