RE: [Algorithms] Halo's Lightshafts

[Gary M. <ga...@va...>]

I think that *may* have been fixed in dx8.1?

> -----Original Message-----
> From: Daniel Vogel [mailto:vo...@ep...]
> Sent: Sunday, December 02, 2001 4:07 PM
> To: Garett Bass; gda...@li...
> Subject: RE: [Algorithms] Halo's Lightshafts
> 
> 
> Destination alpha doesn't work on Win2k in windowed mode.
> 
> -- Daniel, Epic Games Inc.
> 
> > -----Original Message-----
> > From: gda...@li...
> > [mailto:gda...@li...]On Behalf Of
> > Garett Bass
> > Sent: Sunday, December 02, 2001 6:54 PM
> > To: gda...@li...
> > Subject: RE: [Algorithms] Halo's Lightshafts
> >
> >
> > How widely is destination alpha supported on consumer 
> hardware?  Is this a
> > console/GF3-only trick?  Thx for the info.
> >
> > Garett
> >
> > -----Original Message-----
> >
> > For a faster approach try using destination alpha.  
> Anything you want to
> > have the filtery effect (bright lights, the sky, etc) write
> > the brightness into desination alpha during normal 
> rendering.  Then at the
> > end, copy the back buffer into an offscreen buffer and
> > blend that back over the back buffer a few times 
> additively, sourcing the
> > destination alpha you wrote earlier so just those pixels
> > that actually drew from the bright objects are used.
> >
> > -Wade
> >
> >
> > _______________________________________________
> > GDAlgorithms-list mailing list
> > GDA...@li...
> > https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
> >
> 
> 
> _______________________________________________
> GDAlgorithms-list mailing list
> GDA...@li...
> https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
>