nx_body_anchors.nx

nx_body_anchors.nx -- per-body anchor-feature data (Olympus Mons, Hellas Basin, Caloris Basin, Maxwell Montes, Mt Everest, etc.). The "Olympus Mons pops out" data layer. Composes: - nx_solar_system_catalog (body ids, body kinds) - nx_anchor_feature (shape functions for DOME/BASIN/RIDGE) Reads per-body anchor lists and sums their height contributions at any (px, py) query point. Consumed by per-body surface generators (nx_terrestrial_surface in nishi-engine/nx) which add the anchor sum to base FBM noise to produce signature landmarks. V1 ships anchors for the 4 terrestrial planets only. Future slices extend to moons (Tycho crater on Luna; Pavonis on Mars already in Mars list; Mons Huygens on Luna), dwarf planets, etc. Coordinate convention: world coords in arbitrary Q14 units. V1 uses "flat-projected metres at body-scale" -- a body's surface is modelled as a 2D plane in Q14 metres. V2 will project from (latitude, longitude) onto the sphere using nx_camera_q14 sin/cos. Anchor record layout (6 i64 per anchor; matches nx_anchor_feature dispatch signature): out[0] = kind (NX_ANCHOR_*) out[1] = cx_q14 (world x of feature centre) out[2] = cy_q14 out[3] = scale_q14 (characteristic radius / length) out[4] = magnitude_q14_m (peak height or depression depth) out[5] = orient (NX_ANCHOR_ORIENT_*; ignored for radial kinds) Real-world reference values from NASA JPL / USGS / Wikipedia planetary topography. Per cardinal feedback-no-third-party-trust: numbers absorbed from public-domain scientific data (NASA / USGS are US federal civil-service work, TIER_0_UNENCUMBERED). genealogy_id: nasa_mars_global_surveyor_topography + nasa_messenger_mercury_topography + magellan_venus_radar_topography + usgs_earth_dem_canon lineage_id: nx_body_anchors_flat_q14_v1