Elevation Grid and Textures

[Mark Schunder]

Hi,

I have a question regarding elevation grids and texture maps. Does
VRML 2.0 support individual polygon texturing? If I have a grid that
is 20x20 in size, can I apply a different texture to each polygon
(rectangle)?

Is this possible?

Thanks again!

Mark Schunder
schu...@cybernet.com

[Lesley Kalmin]

No, one texture is applied to the entire ElevationGrid.
Since a texture is applied to a given shape, you would have
to use a separate shape for each polygon to get the effect
you are describing.

Lesley

In article <69ja2m$p...@gateway.cybernet.com>, msch...@cybernet.com (Mark Schunder) writes:
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Lesley Kalmin (650)933-3571
Cosmo Software: http://cosmo.sgi.com kal...@sgi.com
Silicon Graphics, Inc.

[Joachim Lous]

Mark Schunder skrev:
: Hi,

: I have a question regarding elevation grids and texture maps. Does
: VRML 2.0 support individual polygon texturing? If I have a grid that
: is 20x20 in size, can I apply a different texture to each polygon
: (rectangle)?

: Is this possible?

No, but you could consolidate all the textures into a single,
properly aligned one. It would have to be pretty big, though,
since tiling wouldn't work for you.
Another trick, if only a few textures are used but many interspersed
polys use the same one: use one elevation grid for each (tiled)
texture. Modify each grids so that all but "its" type of facet
is zeroed out, and then let them intersect.

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Joachim Lous