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)
   }

packages/core/src/schema/nodes/ceiling.ts

@@ -10,11 +10,13 @@ export const CeilingNode = BaseNode.extend({
   // Specific props
   // Polygon boundary - array of [x, z] coordinates defining the ceiling
   polygon: z.array(z.tuple([z.number(), z.number()])),
+  holes: z.array(z.array(z.tuple([z.number(), z.number()]))).default([]),
   height: z.number().default(2.5), // Height in meters
 }).describe(
   dedent`
   Ceiling node - used to represent a ceiling in the building
   - polygon: array of [x, z] points defining the ceiling boundary
+  - holes: array of polygons representing holes in the ceiling
   `,
 )
 

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

@@ -70,6 +70,24 @@ export function generateCeilingGeometry(ceilingNode: CeilingNode): THREE.BufferG
   }
   shape.closePath()
 
+  // Add holes to the shape
+  const holes = ceilingNode.holes || []
+  for (const holePolygon of holes) {
+    if (holePolygon.length < 3) continue
+
+    const holePath = new THREE.Path()
+    const holeFirstPt = holePolygon[0]!
+    holePath.moveTo(holeFirstPt[0], -holeFirstPt[1])
+
+    for (let i = 1; i < holePolygon.length; i++) {
+      const pt = holePolygon[i]!
+      holePath.lineTo(pt[0], -pt[1])
+    }
+    holePath.closePath()
+
+    shape.holes.push(holePath)
+  }
+
   // Create flat shape geometry (no extrusion)
   const geometry = new THREE.ShapeGeometry(shape)