Re: Howto Fade Models

New Message Reply Date view Thread view Subject view Author view

Angus Dorbie (dorbie++at++sgi.com)
Fri, 23 Apr 1999 14:17:53 -0700

There's also a multisample mask for this purpose on RE & iR graphics
when you have a multisample buffer.

Performer uses this for the fade LOD effect.

Cheers,Angus.

Brian Furtaw wrote:
>
> You'll need to enable transparency (blending) for the fading models
> pfGeoState's. To do this call pfGeoState::setMode(PFSTATE_TRANSPARENCY,
> PFTR_ON). Also look at the pfTransparency() call to determine what quality of
> transparency you are interested in.
>
> Brian
>
> On Apr 19, 12:29pm, Gary Quinn wrote:
> > Subject: Howto Fade Models
> > Hi all.
> >
> > I'd like to be able to fade models in and out of
> > view, something along the lines of in/decreasing their
> > transparency or alpha values.
> >
> > There doesn't seem to be anything documented, and
> > I've tried changing geometry set alpha values -
> > but that doesn't seem to do anything.
> >
> > A similar question was posted in Feb 1997,
> > but there wasn't enough detail in the answer
> > for me to implement the solution - which I didn't
> > fully understand anyway :-(
> >
> > Can anybody help please.
> >
> > Cheers,
> > Gary.
> >
> >
> > --
> >
> > Gary Quinn, VR Centre Technical Manager
> > University of Teesside SG Network Admin
> > Borough Road, Middlesbrough Go Player
> > Cleveland, TS1 3BA mailto:Gary++at++tees.ac.uk
> > +44 (0)1642 384303 fax 384310 http://vr.tees.ac.uk
> > -----------------------------------------------------------------------
> > List Archives, FAQ, FTP: http://www.sgi.com/software/performer/
> > Submissions: info-performer++at++sgi.com
> > Admin. requests: info-performer-request++at++sgi.com
> >-- End of excerpt from Gary Quinn
>
> --
> o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o
>
> Brian Furtaw (brian++at++sgi.com)
> Graphics Guru
> 12200-G Plum Orchard Drive Office:(301)572-3293 Fax: (301)572-3280
> Silver Spring, Maryland 20904 OPenGL/Performer/Optimizer/Volumizer
> -----------------------------------------------------------------------
> List Archives, FAQ, FTP: http://www.sgi.com/software/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com

-- 
"Microsoft's system was like a forest that hadn't had a controlled
 burn in decades, just waiting for one person with a match to turn
 it into a disaster. Melissa was Microsoft's fault. They left their
 system wide open to this sort of abuse, they knew it could happen
 and did nothing." -- Bruce Perens


For advanced 3D graphics Performer + OpenGL based examples and tutors:
http://www.dorbie.com/

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Fri Apr 23 1999 - 14:17:58 PDT

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