ManifoldGeometryOps.precompute
==============================

.. py:method:: t3toolbox.backend.geometry.ManifoldGeometryOps.precompute(frame)

   .. code-block:: python

      def precompute(
              self,
              frame:  typ.Tuple,   # (U, O, P, Q)
      ) -> typ.Any:                # the per-frame geometry companion, or None when there is none


   The per-frame companion ``project`` / ``retract`` reuse -- the SF-T3 shared-frame data when
   tied, ``None`` otherwise. Computed ONCE per local model (the ``sweep`` pattern) rather than once
   per matvec; see ``docs/contributor/precompute_and_caching.md``.