Scale final distribution by nationality population

js/countries.js

-App.Data.World.TravelFrictionExponent = -0.5;
+// The smaller, the more global
+App.Data.World.TravelFrictionExponent = -0.6;
+// The smaller, the more are large nationalities downscaled
+App.Data.World.PopScaleFactor = 23;
 
 /**
  * @typedef {Record<number, number>} gridPoint

src/events/intro/customizeSlaveTrade.js

@@ -410,8 +410,7 @@ App.Intro.CustomSlaveTrade = function() {
 				g.append("circle").attr("cx", lon).attr("cy", lat).attr("r", 0.5).attr("fill", "red");
 			}*/
 
-
-/*
+			/*
 			if (App.Data.World.nationIdAt(p) >= 223) {
 				console.log(p);
 				const [lat, lon] = App.Data.World.gridPointToCoordinate(p);
@@ -427,6 +426,47 @@ App.Intro.CustomSlaveTrade = function() {
 			let lat = ((y / height) * 180 - 90) * -1;
 			console.log(lon, lat);
 			populateFromCoordinates(lat, lon);
+			scalePopulations();
+			refresh();
+		}
+	}
+
+	/**
+	 * Scale final nationalities by their global population.
+	 * This decreases the impact large countries have while increasing the relevance of smaller ones
+	 */
+	function scalePopulations() {
+		// Build pop cache
+		const cache = {};
+		for (const p of App.Data.World.gridPoints()) {
+			const nation = App.Data.World.nationAt(p);
+			const pop = App.Data.World.populationAt(p);
+			if (cache.hasOwnProperty(nation)) {
+				cache[nation] += pop;
+			} else {
+				cache[nation] = pop;
+			}
+		}
+
+		// Build pop scale cache
+		for (const p in cache) {
+			const pop = cache[p];
+			const a = Math.exp(App.Data.World.PopScaleFactor);
+			const scaled = a * Math.log1p(pop / a);
+			cache[p] = scaled / pop;
+		}
+
+		// Apply pop scale
+		for (const n in V.nationalities) {
+			const pop = Math.round(V.nationalities[n] * cache[n]);
+			if (n === "Vatican") {
+				console.log(pop, V.nationalities[n]);
+			}
+			if (pop > 0) {
+				V.nationalities[n] = pop;
+			} else {
+				delete V.nationalities[n];
+			}
 		}
 	}
 
@@ -467,10 +507,10 @@ App.Intro.CustomSlaveTrade = function() {
 					gravity = 1; // always give _some_ population for the grid cell you clicked on, if it's inhabited
 				}
 				const nation = App.Data.World.nationAt(p);
-				addNationality(nation, Math.round(gravity));
+				// console.log(nation, gravity, Math.round(gravity));
+				addNationality(nation, gravity);
 			}
 		}
-		refresh();
 	}
 
 	/**