未设置userData

src/DatabaseServices/Board.ts

@@ -81,6 +81,7 @@ export class Board extends Entity
         };
         let extGeo = new ExtrudeGeometry(this.m_Region.Shape, extrudeSettings);
         let mesh = new Mesh(extGeo);
+        mesh.userData = this;
 
         this.m_DrawEntity.set(renderType, mesh);