Re: alpha PFTR_HIGH_QUALITY with pf 1.1?

New Message Reply Date view Thread view Subject view Author view

John Rohlf (jrohlf++at++tubes)
Tue, 18 Jan 94 11:14:11 -0800

>1. Why do INTA or RGBA textures look as if they were quantised to 4 levels with
>4-sample multisampling and to 8 levels with 8-sample multisampling?????
>( Onyx RE2 with 2RM, Performer 1.1, IRIX 5.0.1 )

        Performer's default transparency mechanism uses msalpha() when
        multisampling is enabled. This is the fastest but will quantize
        the transparency levels.

>2. Apparently PFTR_HIGH_QUALITY must be set with pfGStateMode or pfTransparency
>in order to avoid this "quantised" alpha. Is there a way to set
>this in Performer 1.1? This token does not exist in PF1.1.
>I also looked for a similar method in gl but could not find it.
>Can someone help me out here?

        The PFTR_HIGH_QUALITY token is not exposed in 1.1
        but it does exist. In 1.1 its value is 2:

        pfTransparency(2); or pfGStateMode(gs, PFSTATE_TRANSPARENCY, 2);

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:50:09 PDT

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