Re: Z buffer problems drawing solid and wireframe geometry

New Message Reply Date view Thread view Subject view Author view

From: Luis Ignacio Miranda (lmiranda++at++sgi.com)
Date: 08/10/2001 05:50:46

Hi Simon,

You are right. That Z-buffer problem is normal. Using pfDecal you should
fix it.

Best regards,

Nacho

Simon C Mills wrote:

> 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
> _______________________________________________________________________
> -----------------------------------------------------------------------
> List Archives, FAQ, FTP: http://www.sgi.com/software/performer/
> Open Development Project: http://oss.sgi.com/projects/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
> -----------------------------------------------------------------------
> SIGGRAPH 2001 Friends of Performer Meeting: Wed Aug 15, 4:00pm-6:00pm,
> Wilshire Grand Hotel, http://reality.sgi.com/performer/siggraph.html
> ----------------------------------------------------------------------- 

--
NB:  INFORMATION IN THIS MESSAGE IS SGI CONFIDENTIAL.  IT IS INTENDED
SOLELY
FOR THE PERSON(S) TO WHOM IT IS ADDRESSED AND MAY NOT BE COPIED, USED,
DISCLOSED OR DISTRIBUTED TO OTHERS WITHOUT SGI CONSENT.  IF YOU ARE NOT
THE INTENDED RECIPIENT PLEASE WILL YOU NOTIFY ME BY EMAIL OR TELEPHONE,
DELETE THE MESSAGE FROM YOUR SYSTEM IMMEDIATELY AND DESTROY ANY PRINTED
COPIES.

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Fri Aug 10 2001 - 05:46:26 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.