#Camera spin
>> Quaternion math … is polar-based … which causes a singularity
along the polar axis. As the vector approaches that singularity, its
orientation becomes ambiguous. In order to deal with the ambiguity,
the program maintains continuity of motion (or at least tries to
minimize discontinuities) … keep the gimbles on huge sailing ships
from locking as they traversed their own polar singularities …
Euler's theorem, which states something about how any displacement of
an object with a fixed centroid can be represented by a single
rotation about an arbitrary axis.
Earth to Yost! Earth to Yost! 'Sounds like Data describing the
Ambiguous Temporal Singularity on Star Trek tonite…(did I forget to
turn off the T.V….) <g>