splittintting

mapFeatureSettlements.js

@@ -0,0 +1,47 @@
+import { MAP_H, MAP_W, SIZE, clamp, indexOf } from "./mapUtils.js";
+import { influenceFromPoints } from "./mapGeneratorHelpers.js";
+
+export function buildSettlementDemandFields(ctx) {
+  const {
+    sea, agriculture, plain, basinField, coastalLowland, slope, ridgeField,
+    modernCities, markets, commercialPorts, villages,
+  } = ctx;
+
+  const preliminaryUrbanInfluence = influenceFromPoints(modernCities, 18, (c) => clamp((c.population || 60000) / 260000, 0.55, 2.0));
+  const preliminaryTownInfluence = influenceFromPoints([...markets, ...commercialPorts], 10, (p) => p.portClass === "major" ? 1.35 : clamp((p.population || 12000) / 36000, 0.42, 1.1));
+  const preliminaryVillageInfluence = influenceFromPoints(villages, 7, (v) => clamp((v.population || 1800) / 5200, 0.22, 0.9));
+  const settlementDemand = new Float32Array(SIZE);
+  const urbanEdge = new Float32Array(SIZE);
+  const logisticsPreSuitability = new Float32Array(SIZE);
+
+  for (let y = 0; y < MAP_H; y++) {
+    for (let x = 0; x < MAP_W; x++) {
+      const i = indexOf(x, y);
+      if (sea[i]) continue;
+      const density = clamp(preliminaryUrbanInfluence[i] * 0.62 + preliminaryTownInfluence[i] * 0.34 + preliminaryVillageInfluence[i] * 0.16);
+      settlementDemand[i] = density;
+      urbanEdge[i] = clamp(1 - Math.abs(density - 0.46) / 0.32);
+      logisticsPreSuitability[i] = clamp(
+        agriculture[i] * 0.30 +
+        plain[i] * 0.24 +
+        basinField[i] * 0.14 +
+        coastalLowland[i] * 0.12 +
+        preliminaryTownInfluence[i] * 0.18 +
+        urbanEdge[i] * 0.34 -
+        preliminaryUrbanInfluence[i] * 0.20 -
+        slope[i] * 0.50 -
+        ridgeField[i] * 0.32
+      );
+    }
+  }
+
+
+  return {
+    preliminaryUrbanInfluence,
+    preliminaryTownInfluence,
+    preliminaryVillageInfluence,
+    settlementDemand,
+    urbanEdge,
+    logisticsPreSuitability,
+  };
+}