nx_weather_pattern.nx

nx_weather_pattern.nx -- spatial + temporal weather field. Seventh demonstration of the kind-specific-generator cardinal `feedback-kind-specific-generators-not-broad-noise`. Weather is neither static nor noise -- it has REGIONAL COHERENCE (a single storm cell covers tens of kilometres) and TEMPORAL CYCLES (weeks, seasons). Pure FBM noise gets neither right. Weather-internal logic in v1: - World partitioned into "weather cells" (default 50 km square). All voxels inside one cell share the same weather kind at a given moment. - Time cycles every ~7 game-days: weather changes deterministically per (cell, week) hash. Storms come and go. - 8 sealed-enum weather kinds with characteristic parameters (precipitation, temperature offset, visibility, wind speed, fog density). FULL CAPABILITY (per feedback-maximum-capability-no-simplification cardinal, 2026-05-16): - Smooth spatial transitions via bilinear-blend across the 4 surrounding cell centers (nx_weather_params_smooth) - Per-biome weather distribution (nx_weather_kind_at_biome reweights the kind histogram by biome -- rainforest gets RAIN more often; desert gets HEATWAVE; arctic gets BLIZZARD) - Multi-tick weather evolution: 15% ramp-in + 70% steady + 15% ramp-out within each cycle blends previous, current, next cycle params (nx_weather_evolution_factor + smooth-params) - Wind direction vector (Q14 unit vec dx/dy) per cell+cycle, hashed to one of 16 compass directions; speed from kind params - Lightning discrete events for STORM/BLIZZARD: position + timestamp via deterministic per-cycle hash; composable with nx_world_event Loss audit: cell-based kind discretisation loses sub-cell weather VARIETY (acceptable since real weather IS regionally coherent -- you can't have rain and sun side-by-side in the same valley). PARAMS, by contrast, smooth across cells via bilinear blending so renderer doesn't get sharp transitions.