ceiling holes

packages/core/src/hooks/spatial-grid/spatial-grid-manager.ts

@@ -566,7 +566,7 @@ export class SpatialGridManager {
 
   /**
    * Check if an item can be placed on a ceiling.
-   * Validates that the footprint is within the ceiling polygon and doesn't overlap other ceiling items.
+   * Validates that the footprint is within the ceiling polygon (but not in any holes) and doesn't overlap other ceiling items.
    */
   canPlaceOnCeiling(
     ceilingId: string,
@@ -588,6 +588,15 @@ export class SpatialGridManager {
       }
     }
 
+    // Check if item center is in any hole (if so, it cannot be placed)
+    const [centerX, , centerZ] = position
+    const holes = ceiling.holes || []
+    for (const hole of holes) {
+      if (hole.length >= 3 && pointInPolygon(centerX, centerZ, hole)) {
+        return { valid: false, conflictIds: [] }
+      }
+    }
+
     // Check for overlaps with other ceiling items
     return this.getCeilingGrid(ceilingId).canPlace(position, dimensions, rotation, ignoreIds)
   }