nx_world_event.nx

nx_world_event.nx -- dynamic world events: comets hit, volcanoes erupt, wizards terraform. The DYNAMIC layer that makes procgen worlds feel ALIVE rather than static. Per user 2026-05-15: "comets hitting the earth randomly and volcanoes going off etc our 14 day approach should really drive a real immersion... even if fantasy where a real powerful wizard or god could terraform." Captures the SAME TYPE OF CAUSAL LOGIC that solar-system bodies have (impacts pock the surface; volcanism builds cones; tectonic stress lifts mountains; floods carve channels), generalised so a fantasy world's wizard / god / player can drive the same kinds of mutations. Not solar-system-specific. Static landmarks (Olympus Mons, Caloris Basin) live in nx_anchor_feature + nx_body_anchors. This primitive captures EVENTS THAT HAPPENED IN THE WORLD'S HISTORY -- with a time stamp and a decay model so old impacts gradually erode back toward baseline. Event record (8 i64 fields): rec[0] = kind (NX_WORLD_EVENT_*) rec[1] = time_q14 when the event happened (arbitrary unit; caller defines the time scale) rec[2] = cx_q14 position x in world coords rec[3] = cy_q14 position y in world coords rec[4] = radius_q14 characteristic affected radius rec[5] = intensity_q14_m peak elevation change (positive); the sign is set by the kind (impacts dig down, eruptions build up) rec[6] = decay_age_q14 how long the event takes to erode back to baseline (older than this -> 0 contribution). Setting decay_age to a very large value gives "permanent" features. rec[7] = meta kind-specific extra parameter (orientation, asymmetry seed, biome shift kind, etc.)