Re: pfLayer

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Michael Jones (mtj++at++babar)
Mon, 16 Jan 1995 09:05:16 -0800

On Jan 14, 6:52pm, Rejean Chartrand wrote:
> Subject: pfLayer
:
:I would like to know what's the correct way to create multiple layered
:polygons (e.g. for example if I have 5 polygons that are coplanars which
:the first one is the base layer and contains, within is boundaries, all
:other polygons) ?
:
:Thanks in advance !
:
:Rejean Chartrand.
:CAE Electronics Ltd., Montreal CANADA.
>-- End of excerpt from Rejean Chartrand

if they are considered to be numbered from 1 to 5, with 5 "on top"
and 1 "on the bottom", so that #5 is always visible, and #1 may be
masked by any of #2 through #5, then you wany a pfLayer node
with #1 as the base and #2, #3, #4, and #5 as children.

If you are using MultiGen or ModelGen, you'd make #1 be a
face and #2 -> #5 be sub-faces in that order. It works correctly
from all angles and distances using the "HIGH_QUALITY"
style of decals, and from many angles and distances when
employing the "HIGH_SPEED" method.

-- 


Be seeing you,      Phone:415.390.1455  Fax:415.965.2658 M/S:8U-590
Michael T. Jones    Silicon Graphics, Advanced Graphics Division
mtj++at++sgi.com         2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311

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