From ca49618fdb729080776528d9b0e96a75d533082e Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Sat, 4 Apr 2026 21:54:26 +0900
Subject: [PATCH] Update engine.ts

---
 packages/frontend/src/utility/room/engine.ts | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/packages/frontend/src/utility/room/engine.ts b/packages/frontend/src/utility/room/engine.ts
index 16f5e9c1d6..312d8c724b 100644
--- a/packages/frontend/src/utility/room/engine.ts
+++ b/packages/frontend/src/utility/room/engine.ts
@@ -378,7 +378,7 @@ export class RoomEngine {
 	private grabbingCtx: {
 		objectId: string;
 		objectType: string;
-		mesh: BABYLON.Mesh;
+		mesh: BABYLON.TransformNode;
 		originalDiffOfPosition: BABYLON.Vector3;
 		originalDiffOfRotationY: number;
 		distance: number;
@@ -1285,14 +1285,16 @@ export class RoomEngine {
 	private createGhost(mesh: BABYLON.Mesh): BABYLON.Mesh {
 		const ghost = mesh.clone('ghost', null, false)!;
 		ghost.metadata = { isGhost: true };
+		ghost.checkCollisions = false;
+		for (const m of ghost.getChildMeshes()) {
+			m.metadata = { isGhost: true };
+			m.checkCollisions = false;
+		}
 
 		/* なんかエラーになる
 		const materials = new WeakMap<BABYLON.Material, BABYLON.Material>();
 
 		for (const m of ghost.getChildMeshes() as BABYLON.Mesh[]) {
-			m.metadata = { isGhost: true };
-			m.checkCollisions = false;
-
 			if (m.material == null) continue;
 
 			if (materials.has(m.material)) {
@@ -1347,6 +1349,11 @@ export class RoomEngine {
 			options,
 		});
 
+		root.unfreezeWorldMatrix();
+		for (const m of root.getChildMeshes()) {
+			m.unfreezeWorldMatrix();
+		}
+
 		const ghost = this.createGhost(root);
 
 		let sticky: string | null;