Changes

Co-authored-by: Reifonas <211114984+Reifonas@users.noreply.github.com>
2026-05-21 14:51:00 +00:00
parent e2b780e51b
commit adeab0acd1
1 changed files with 18 additions and 0 deletions
@@ -10,6 +10,24 @@ interface ModelViewerProps {
  url?: string; // legacy, ignored — uses store.models
 }

+/** Walk up the parent chain until we find a node tagged as `ifcElement`,
+ *  or the model root. Returns null if neither found. */
+export function findElementRoot(obj: THREE.Object3D | null): THREE.Object3D | null {
+  let cur: THREE.Object3D | null = obj;
+  while (cur) {
+    if (cur.userData?.ifcElement) return cur;
+    cur = cur.parent;
+  }
+  return null;
+}
+
+/** Stable key for an element across reloads: prefers ifcId, falls back to name. */
+export function elementKey(modelId: string, el: THREE.Object3D): string {
+  const id = el.userData?.ifcId ?? el.name ?? el.uuid;
+  return `${modelId}:${id}`;
+}
+
+
 function LoadingFallback() {
  return (
    <Html center>