Function slabSystem

examples/scene-graph/room.ts:135–159

(dt: number)

// SlabSystem (priority 1) — generates slab geometry for dirty slabs
function slabSystem(dt: number): void {
  for (const id of dirtyNodes) {
    const node = nodes.get(id);
    if (!node || node.type !== 'slab') continue;

    const handle = ensureSceneNode(id);
    const slab = node as SlabNode;

    // Flatten polygon for extrusion
    const flat: number[] = [];
    for (const [x, z] of slab.polygon) {
      flat.push(x);
      flat.push(z);
    }

    // Extrude polygon to create slab
    extrudePolygon(handle, flat, slab.elevation);

    // Gray floor material
    setSceneNodeColor(handle, 0.75, 0.75, 0.70, 1.0);
    setSceneNodePbr(handle, 0.6, 0.0);

    clearDirty(id);
  }
}

// WallSystem (priority 4) — generates wall geometry with door cutouts
function wallSystem(dt: number): void {