event systems

packages/core/package.json

@@ -27,6 +27,7 @@
   },
   "dependencies": {
     "dedent": "^1.7.1",
+    "mitt": "^3.0.1",
     "nanoid": "^5.1.6",
     "zod": "^4.3.5",
     "zustand": "^5.0.10"

packages/core/src/events/bus.ts

@@ -0,0 +1,45 @@
+import mitt from "mitt";
+import { ItemNode, WallNode } from "../schema";
+import { AnyNode } from "../schema/types";
+export interface GridEvent {
+  position: [number, number];
+}
+
+export interface NodeEvent {
+  node: AnyNode;
+  position: [number, number, number]; // [x, y, z] world coordinates
+  normal?: [number, number, number]; // [x, y, z] normal vector
+  stopPropagation: () => void;
+}
+
+export interface WallEvent extends NodeEvent {
+  node: WallNode;
+}
+
+export interface ItemEvent extends NodeEvent {
+  node: ItemNode;
+}
+
+type EditorEvents = {
+  "grid:click": GridEvent;
+  "grid:rightclick": GridEvent;
+  "grid:move": GridEvent;
+  "grid:double-click": GridEvent;
+  "grid:enter": GridEvent;
+  "grid:leave": GridEvent;
+  "grid:pointerdown": GridEvent;
+  "grid:pointerup": GridEvent;
+  "wall:click": WallEvent;
+  "wall:move": WallEvent;
+  "wall:enter": WallEvent;
+  "wall:leave": WallEvent;
+  "wall:pointerdown": WallEvent;
+  "wall:pointerup": WallEvent;
+  "item:click": ItemEvent;
+  "item:move": ItemEvent;
+  "item:enter": ItemEvent;
+  "item:leave": ItemEvent;
+  "item:pointerdown": ItemEvent;
+  "item:pointerup": ItemEvent;
+};
+export const emitter = mitt<EditorEvents>();

packages/core/src/index.ts

@@ -2,11 +2,17 @@
 export { default as useScene } from "./store/useScene";
 
 // Hooks
-export { useRegistry } from "./hooks/scene-registry/scene-registry";
+export {
+  sceneRegistry,
+  useRegistry,
+} from "./hooks/scene-registry/scene-registry";
 
 // Systems
 export { LevelSystem } from "./systems/level/level-system";
 export { WallSystem } from "./systems/wall/wall-system";
 
+// Events
+export { emitter } from "./events/bus";
+
 // Schema
 export * from "./schema";

packages/core/src/systems/wall/wall-system.tsx

@@ -43,9 +43,9 @@ function updateWallGeometry(wallId: string) {
   if (!mesh) return;
 
   const childrenIds = node.children || [];
-  const childrenNodes = childrenIds.map(
-    (childId) => useScene.getState().nodes[childId]
-  );
+  const childrenNodes = childrenIds
+    .map((childId) => useScene.getState().nodes[childId])
+    .filter((n): n is AnyNode => n !== undefined);
 
   // Perform the Extrusion with Holes logic we discussed
   const newGeo = generateExtrudedWall(node, childrenNodes);