slab holes

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

@@ -8,6 +8,7 @@ export const SlabNode = BaseNode.extend({
   // Specific props
   // Polygon boundary - array of [x, z] coordinates defining the slab
   polygon: z.array(z.tuple([z.number(), z.number()])),
+  holes: z.array(z.array(z.tuple([z.number(), z.number()]))).default([]),
   elevation: z.number().default(0.05), // Elevation in meters
 }).describe(
   dedent`

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

@@ -123,6 +123,25 @@ export function generateSlabGeometry(slabNode: SlabNode): THREE.BufferGeometry {
   }
   shape.closePath()
 
+  // Add holes to the shape
+  if (slabNode.holes && slabNode.holes.length > 0) {
+    for (const holePolygon of slabNode.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)
+    }
+  }
+
   // Extrude the shape by elevation
   const geometry = new THREE.ExtrudeGeometry(shape, {
     depth: elevation,