Z buffer problems drawing solid and wireframe geometry

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From: Simon C Mills (simon++at++wgs.estec.esa.nl)
Date: 08/10/2001 05:59:49

Hi, maybe someone can help me with this one.

To represent some phyiscal attributes, I'm adding to my scene some
geometry (cones, pyramids, etc) that I want to draw as filled geometry
with transparency and/or a wireframe geometry. OK, when just solid *or*
wireframe - they are pfGeoSets with triangles/quads or lines. When both
are drawn I get Z buffer fighting so the lines "twinkle" and don't look
nice. Can I have the lines drawn on top of the solid but still doing
correct Z buffer with the rest of the scene?

It would seem that some forms of highlighting (pfHighlight) can do this
so I'm looking for a similar method. pfLayers or pfDecal perhaps?

Simon
_______________________________________________________________________

Simon Mills
Modelling & Simulation Section (TOS-EMM) Tel: +31 (0)71 565 3725
European Space Agency (ESA/ESTEC) Fax: +31 (0)71 565 5420
Postbus 299, 2200AG Noordwijk e-mail: Simon.Mills++at++esa.int
The Netherlands http://www.estec.esa.nl/wmwww/EMM
_______________________________________________________________________

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