OptionalinCubic Bezier tangent handles in world coords. Default undefined = smooth (handles auto-derived from neighbors).
OptionaloutOptionalspiroSpiro continuity class at this anchor. Default 'g2-smooth'.
OptionalweightNURBS rational weight. Default 1 (non-rational B-spline). Clamped ≥ 1e-3 by the UI.
A point in the shared anchor set. Every representation reads only the fields it cares about: cubic Bezier reads inHandle/outHandle; NURBS reads weight; Spiro reads spiroType. Edits to position propagate to every representation; edits to per-rep fields only affect that rep.