polygon layers
WILLIAM_MARINELLI++at++ntsc.navy.mil
Tue, 22 Oct 96 07:11:15 EST
I notice that if I model coplanar polygons in multigen with the
following hierarchy ....
g1
|
|
o1
|___________
| | | | |
p1 p2 p3 p4 p5
then I run into the typical z buffer resolution problems that one
would expect with coplanar when I diplay the geometry in perfly.
OTOH if I model the same geometry in with this hierarchy....
g1
|
|
o1
|
|
p1 (ground)
|
|
p2 (airstrip)
|_____
| | |
p3 p4 p5 (stripes)
...then the problem simply goes away. Hence we don't have to model the
roads 6 feet above the ground (MTJ might still get a little passionate
when he hears about this) or play with the near/far clip. The
performer scene graph seems to indicate that this modeling technique
generates some sort of layer in perfly.
Question - is the reason for this because the loader recognizes the
"parent/daughter" polygons and invokes pfLayer or is it some other
sort of magic?
Regards,
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Bill Marinelli _______ |;;;;/~\\\|
electronic engineer / \ (|(0)-(0)|)
My ancestors swung by their necks, not their tails. | Hello! > | , |
I suport publick skools \________/ \ - /
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