"clipka" <nomail@nomail> wrote:

> > Perhaps there's some subtle code missing from the macro, I don't know.
>
> No, it's perfectly fine as it is. If you need more control over left/right
> issues, you'll need to use a series of VCross operations instead.

Ugh. VCross, vdot...my head spins.  I'm still having trouble wrapping my poor
little mind around the transform.inc stuff in general; just spent (another!)
hour or two poring over it all. I try mightily to use some of those macros in
my code, only to find that my understanding of their workings is just plain
wrong, or else I'm not setting them up correctly. Someday it all *will* infuse
my brain cells...

An example (which I'm trying to figure out at the moment): making my translated
camera rotate or 'roll' (like the 'rolling' of an airplane, if I have the
analogy correct), around the axis defined by/between the arbitrary camera
position and its look_at point. (So that the rolling axis is 'centered' in the
camera lens, so to speak.)  I *know* it should be simple to do, but right now
it's a mystery wrapped in an enigma.
>
> > Luckily, when using a rather amorphous shape for the traced-on object--like a
> > blob--these rotation anomalies don't show themselves too badly.
>
> Even in such cases it is probably wise to do a random rotation about the y axis
> first, to kill off any remaining subtle patterns due to orientation.

Good idea.

KW

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