Re: circular mask

New Message Reply Date view Thread view Subject view Author view

Steve Baker (sbaker++at++link.com)
Fri, 3 Apr 1998 13:18:45 -0600 (CST)

On Thu, 2 Apr 1998 crakrjak++at++xerxesinc.com wrote:

> hi, the output of my program has to give a circular output unlike
> traditional quad viewport. i am wondering what would be best way to mask
> out in black the exterior of my circular viewport. I would really
> appreciate any help on this thanks.

If the circular mask doesn't change shape, you can draw the mask into
the overlay planes to make it look black. Then you might want to consider
using some user defined clip planes to clip the scene to (say) an octagon
in an effort to reduce the polygon count and pixel fill rates.

Steve Baker (817)619-8776 (Vox/Vox-Mail)
Raytheon Systems Inc. (817)619-4028 (Fax)
Work: SBaker++at++link.com http://www.hti.com
Home: SJBaker1++at++airmail.net http://web2.airmail.net/sjbaker1

=======================================================================
List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
            Submissions: info-performer++at++sgi.com
        Admin. requests: info-performer-request++at++sgi.com

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:57:11 PDT

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