A continent used to always seed exactly one culture at the dawn
(seedCultures(), grouped by regionId), which -- combined with the existing
border-conversion/backfill dynamics -- tended to erode into one
super-dominant culture covering the entire world over a long simulated run.
seedCultures() now splits each continent into 1..cultDawnMaxPerContinent
initial peoples via deterministic farthest-point seeding (a settlement is
assigned to its nearest seed point, giving geographically coherent,
Voronoi-like cultural regions instead of a checkerboard). The target count
scales with the continent's settlement population via the new
cultDawnSettlementsPerCulture config knob, capped by cultDawnMaxPerContinent.
Per-culture ethos/faith/name hashes now fold in Culture.id so multiple
cultures sharing a continent (and therefore the same regionId/bank) get
distinct identities instead of colliding.
This surfaced a real, previously-latent ordering bug: computeTerritory()
(realm/vassalage grouping, which prefers matching by actual culture and only
falls back to same-continent when culture data doesn't exist yet) ran BEFORE
computeCultures() populated per-settlement culture, so on every fresh
recompute realms formed by continent for one full pass before the next
recompute split them correctly. Harmless before this change (one culture per
continent made the two equivalent), but would have left temporarily
multi-cultural realms now. Fixed at the root: split computeCultures() into
refreshSettlementCultures() (the settlement-level seed/backfill/tally slice,
no dependency on `nations`) and had computeTerritory() call it internally
before grouping -- every caller (production and the dozens of existing test
call sites) gets correct behaviour automatically, no call-site changes needed
beyond the two tests whose assertions encoded the old exact one-per-continent
invariant.
test_culture.cpp and test_cultevo.cpp updated to assert the new bounded
(1..cultDawnMaxPerContinent) invariant instead of exact equality, plus that a
single culture never itself spans two continents (still enforced).
Verified live: a single continent now shows six distinct peoples ("the
Thisur", "the Bomebro", "the Draordaes", etc.) instead of one dominant
culture, while realms remain correctly mono-cultural.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TMfyZv91tonDnPJqbaTVJE
1. Realm names no longer literally reuse the capital settlement's own name
("Kingdom of X" where X == the city). Kingdoms/empires now get an
independently generated "place name" (namegen::makeName, keyed on the
capital settlement's permanent id + its own language bank, deterministic
and stable across yearly recomputes) so a realm and the city it's ruled
from read as two distinct places, same as any real one.
2. stepColonization() now skips a realm with no assigned culture
(nat.cultureId < 0) -- nothing to pass on to a new colony, and it stops a
culture-less realm from propagating that gap to its colonies.
3. Realm labels (3D, 2D, and the atlas export) now always show a culture
line -- either the real "(the Velmar)" or an explicit "(cultureless)" in
a muted colour, instead of silently omitting the line when
Nation.cultureId is unset. Makes a genuinely culture-less realm (can
still arise from conquest/schism edge cases) a readable, intentional-
looking state rather than a gap that looks like a rendering bug.
test_culture.cpp updated to rebuild the new independent name deterministically
(mirroring PlanetCulture.cpp's private name-generation formula) instead of
asserting the old capital-name-based format, plus a new assertion that a
realm's place name differs from its capital's own name.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TMfyZv91tonDnPJqbaTVJE
Give the world peoples and faiths on top of Step 3's realms. All derived
deterministically from the (saved) settlement set + geography (pure hashes,
no RNG, recomputed each sim year -> no save-version bump, step-back free).
- PlanetCulture.{hpp,cpp}: computeCultures() groups living settlements into one
culture per inhabited continent, each with a generated people name, a dominant
ethos picked from its cells' environment (Seafaring/Highland/Nomadic/Agrarian,
else a hashed Mercantile/Warlike), and a religion (a Faith focus biased by the
dominant biome + a generated faith name). Runs after computeTerritory().
- Governments: each realm (Nation) gets a GovType from its tier + a deterministic
pick, folded into its name ("Republic of X", "Duchy of X", "X Theocracy", "X
Confederation", "X Dominion", ...) -- culture-driven renaming.
- Culture-driven grouping: realm vassalage is now restricted to the same
continent, so every kingdom/empire is mono-cultural.
- Render: a Culture colour mode (cultureColor, cultural blocs) + pale
buildCultureBorders lines + a Cultures tab + a cell-info culture/faith line +
government-aware realm labels, all under key X. Cultures recompute with
territory in rebuildTerritory().
- test_culture.cpp: one culture per continent, valid ethos/faith, governments per
tier reflected in names, mono-cultural realms, determinism, RNG isolation,
save->load->recompute parity. All 12 suites green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
