remove single pixel lakes

src/scripts/TerrainMapGenerator.ts

@@ -60,6 +60,7 @@ export async function loadTerrainMap(): Promise<void> {
         }
     }
 
+    removeSmallLakes(terrain)
     const shorelineWaters = processShore(terrain)
     processDistToLand(shorelineWaters, terrain)
     processOcean(terrain)
@@ -235,6 +236,28 @@ function processOcean(map: Terrain[][]) {
     }
 }
 
+function removeSmallLakes(map: Terrain[][]) {
+    console.log(`removing lakes ${map.length}, ${map[0].length}`)
+
+    for (let x = 0; x < map.length; x++) {
+        for (let y = 0; y < map[0].length; y++) {
+            if (map[x][y].type != TerrainType.Water) {
+                continue
+            }
+            let allLand = true
+            for (const neighbor of neighbors(x, y, map)) {
+                if (neighbor.type != TerrainType.Land) {
+                    allLand = false
+                }
+            }
+            if (allLand) {
+                map[x][y].type = TerrainType.Land
+                map[x][y].magnitude = 0
+            }
+        }
+    }
+}
+
 function logBinaryAsBits(data: Uint8Array, length: number = 8) {
     const bits = Array.from(data.slice(0, length))
         .map(b => b.toString(2).padStart(8, '0'))