Implement main game as a mod

client/workers/chunk_worker.ts

@@ -4,7 +4,8 @@ import type { BlockRegistry } from "$/common/everything_registry.ts";
 import type { SpriteRegion } from "$/common/constants.ts";
 import type { Texture } from "../renderer/types.ts";
 import type { FromChunkWorker, ToChunkWorker } from "./chunk_messages.ts";
-import { generate_raw_chunk } from "$/common/generation.ts";
+import { generate_raw_chunk, WorldgenSetup } from "$/common/generation.ts";
+import { load_worldgen } from "$/common/worldgen_loader.ts";
 
 const pad = 0.5;
 
@@ -266,8 +267,11 @@ let blocks_registry: BlockRegistry[] = [];
 let block_ids: Record<string, number> = {};
 let textures_info: TexturesInfo = {};
 let image: Texture;
+let worldgen: WorldgenSetup | undefined;
+// generating has to wait for mods' worldgen scripts, or this worker's terrain wouldn't match the server's
+let worldgen_ready: Promise<void> = Promise.resolve();
 
-self.onmessage = (event: MessageEvent<ToChunkWorker>) => {
+self.onmessage = async (event: MessageEvent<ToChunkWorker>) => {
 	const message = event.data;
 	switch (message.type) {
 		case "init":
@@ -275,8 +279,12 @@ self.onmessage = (event: MessageEvent<ToChunkWorker>) => {
 			block_ids = message.block_ids;
 			textures_info = message.textures_info;
 			image = message.image as Texture;
+			worldgen_ready = load_worldgen(message.worldgen_scripts, message.ores).then((setup) => {
+				worldgen = setup;
+			});
 			break;
 		case "generate":
+			await worldgen_ready;
 			generate(message.chunk_x, message.chunk_z, message.seed);
 			break;
 		case "mesh": {
@@ -311,7 +319,7 @@ function post(message: FromChunkWorker, transfer: Transferable[]) {
 }
 
 function generate(chunk_x: number, chunk_z: number, seed: string) {
-	const { blocks, spills } = generate_raw_chunk(chunk_x, chunk_z, seed, block_ids);
+	const { blocks, spills } = generate_raw_chunk(chunk_x, chunk_z, seed, block_ids, worldgen);
 	post({ type: "generated", chunk_x, chunk_z, blocks, spills }, [blocks.buffer, spills.buffer]);
 }
 
@@ -353,12 +361,12 @@ function make_chunk_mesh(
 				const block_info = blocks_registry[block_nid];
 
 				const texture_ids = {
-					top: "bworld:missing",
-					bottom: "bworld:missing",
-					front: "bworld:missing",
-					back: "bworld:missing",
-					left: "bworld:missing",
-					right: "bworld:missing",
+					top: "engine:missing",
+					bottom: "engine:missing",
+					front: "engine:missing",
+					back: "engine:missing",
+					left: "engine:missing",
+					right: "engine:missing",
 				};
 
 				const textures = block_info.textures;