Terrain generation

client/systems/world_generation_system.ts

@@ -0,0 +1,43 @@
+import { System } from "$/common/ecs/mod.ts";
+import { ClientWorld } from "../client_world.ts";
+import { Position } from "../../common/components/position.ts";
+import { CHUNK_SIZE } from "../components/dimension.ts";
+import { PlayerComponent } from "$/client/player.ts";
+
+export class WorldGenerationSystem extends System {
+	constructor() {
+		super();
+	}
+
+	update(world: ClientWorld, _delta: number): void {
+		const [player] = world.get_tag("player")!;
+		const position = player.get(Position)!;
+		const player_component = player.get(PlayerComponent)!;
+		const dimension = world.dimension;
+
+		const player_chunk_x = Math.floor(position.x / CHUNK_SIZE);
+		const player_chunk_z = Math.floor(position.z / CHUNK_SIZE);
+
+		const render_distance = player_component.render_distance;
+
+		for (const chunk of dimension.chunks) {
+			if (Math.abs(chunk.x - player_chunk_x) > render_distance) {
+				dimension.unload_chunk(chunk.x, chunk.z);
+			}
+			if (Math.abs(chunk.z - player_chunk_z) > render_distance) {
+				dimension.unload_chunk(chunk.x, chunk.z);
+			}
+		}
+
+		for (let i = player_chunk_x - render_distance; i <= player_chunk_x + render_distance; i += 1) {
+			for (let j = player_chunk_z - render_distance; j <= player_chunk_z + render_distance; j += 1) {
+				const maybe_chunk = dimension.chunks.find((chunk) => chunk.x === i && chunk.z === j);
+				if (!maybe_chunk || !maybe_chunk.generated) {
+					console.log("loading chunk", i, j);
+					dimension.load_chunk(i, j);
+					return;
+				}
+			}
+		}
+	}
+}