Re: DOF transformation ordering

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Marcus Barnes (marcus++at++multigen.com)
Tue, 11 Mar 1997 14:55:49 -0800

On Mar 11, 8:41am, Christopher R Volpe wrote:
> Subject: Re: DOF transformation ordering
> Marcus Barnes wrote:
> >
> > Translations and scales are straightforward. The order of rotations in
> > a DOF is identical to Performer's heading, pitch and roll rotations that
> > are encapsulated in a pfCoord (these are referred to as Euler angles).
> > The only difference may be the terminology. Older versions of MultiGen
> > used the terms twist, azimuth and inclination to denote heading, pitch
> > and roll respectively in Performer.
>
> You sure about the "respectively" part? It sounds to me that twist
> probably corresponds to roll (not heading), azimuth corresponds to
> heading (not pitch), and inclination corresponds to pitch (not roll).

Yes I'm very sure about it. The loader's DOFcb data structure still has members
that use those old names: "twist", "azim", and "incl". A brief history of these
confusing terms was posted to info-performer last month.

Regards.

--
+ Marcus Barnes, Technical Staff        mailto:marcus++at++multigen.com +
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