Re: GeoSet data alignment

New Message Reply Date view Thread view Subject view Author view

John Rohlf (jrohlf++at++tubes)
Wed, 22 Mar 95 10:06:57 PST

>
> Hi
>
> On VGXs, better performance was achieved by quadeord-aligning the vertex data
> (vertex, normals, colors, tex-coords). With Performer, it seems, vertex coords
> are always 3 word aligned, tex-coords are 2 word aligned and so on. While this
> is OK for RealityEngine, shouldn't there be a mode for quadword aligned data
> for GeoSets, to be used when running on VGX or VGXT ? Or maybe there is such an
> undocumented mode ?

        1.2 does not support quad-word alignment of goeset data. If
you require this, I suggest you convert your static geosets to
GL objects with pfGSetDrawMode(gset, PFGS_COMPILE_GL, 1). (Note that
immediate-mode geosets are often faster than their corresponding
GL objects on RealityEngine).

        Performer 2.0 supports arbitrary strides for geoset attributes
so you will be able to quad-word align your geoset data.

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:51:06 PDT

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