nx_geom.nx

nx_geom.nx -- geometric primitives (V4 of vision rollout). Hough transform line detection (Hough 1962, Duda+Hart 1972) and circle detection (Ballard 1981 gradient method). Pure i64. What this unlocks: + room geometry (walls, doors, window frames as line peaks) + architectural analysis (vanishing points via line intersection) + vehicle/animal anatomy (wheels, eyes as circles) + table-top objects (plates, cups, bottles as circles) + rule-of-thirds + leading-line aesthetics (line-angle histogram) All trig is Q10 fixed-point. cos/sin tables hardcoded for 36 angles (5 degree resolution) -- sufficient for major-line detection; finer-grained vision would interpolate or use larger tables. genealogy_id: hough_1962_patent + duda_hart_1972_generalized + ballard_1981_generalized_circle lineage_id: voting_accumulator + gradient_direction_voting axioms: NX_AX_GEOM_LINE_HOMOGENEOUS (rho = x cos t + y sin t)