Corrigiu seleção de chapas e bloqueio

X-Lovable-Edit-ID: edt-1984935b-5500-4f44-84a9-a0d5f5eeb8db
Co-authored-by: Reifonas <211114984+Reifonas@users.noreply.github.com>

src/components/three/ModelViewer.tsx

@@ -10,15 +10,35 @@ interface ModelViewerProps {
   url?: string; // legacy, ignored — uses store.models
 }
 
-/** Walk up the parent chain until we find a node tagged as `ifcElement`,
+function isPickableModelMesh(obj: THREE.Object3D): obj is THREE.Mesh {
- *  or the model root. Returns null if neither found. */
+  if (!(obj instanceof THREE.Mesh)) return false;
+  if (obj.userData.__edgeLine) return false;
+  if (obj.geometry instanceof THREE.SphereGeometry) return false;
+  if (obj.geometry instanceof THREE.RingGeometry) return false;
+  if (obj.geometry instanceof THREE.PlaneGeometry) return false;
+  return true;
+}
+
+/** Walk up the parent chain until we find a node tagged as `ifcElement`.
+ *  Falls back to the clicked mesh so older/demo GLBs without IFC metadata
+ *  still support selection/highlight. */
 export function findElementRoot(obj: THREE.Object3D | null): THREE.Object3D | null {
+  const fallback = isPickableModelMesh(obj as THREE.Object3D) ? obj : null;
   let cur: THREE.Object3D | null = obj;
   while (cur) {
     if (cur.userData?.ifcElement) return cur;
     cur = cur.parent;
   }
-  return null;
+  return fallback;
+}
+
+function hasIfcAncestor(obj: THREE.Object3D): boolean {
+  let cur = obj.parent;
+  while (cur) {
+    if (cur.userData?.ifcElement) return true;
+    cur = cur.parent;
+  }
+  return false;
 }
 
 /** Stable key for an element across reloads: prefers ifcId, falls back to name. */
@@ -703,26 +723,16 @@ function SelectionHandler() {
       mouse.y = -((e.clientY - rect.top) / rect.height) * 2 + 1;
       raycaster.setFromCamera(mouse, camera);
       const intersects = raycaster.intersectObjects(scene.children, true);
-      const hit = intersects.find((i) => {
+      const hit = intersects.find((i) => isPickableModelMesh(i.object));
-        const o = i.object;
-        if (!(o instanceof THREE.Mesh)) return false;
-        if (o.userData.__edgeLine) return false;
-        if (o.geometry instanceof THREE.SphereGeometry) return false;
-        if (o.geometry instanceof THREE.RingGeometry) return false;
-        if (o.geometry instanceof THREE.PlaneGeometry) return false;
-        return true;
-      });
       if (!hit) return;
 
+      const element = findElementRoot(hit.object);
       let cur: THREE.Object3D | null = hit.object;
-      let element: THREE.Object3D | null = null;
       let modelId: string | null = null;
       while (cur) {
-        if (!element && cur.userData?.ifcElement) element = cur;
         if (!modelId && cur.userData?.modelId) modelId = cur.userData.modelId as string;
         cur = cur.parent;
       }
-      if (!element) element = hit.object;
       if (!modelId) modelId = useModelStore.getState().activeModelId;
       if (!modelId || !element) return;
       const key = elementKey(modelId, element);
@@ -759,7 +769,7 @@ function VisibilityApplier() {
       const modelId = root.userData?.modelId as string | undefined;
       if (!modelId) return;
       root.traverse((el) => {
-        if (!el.userData?.ifcElement) return;
+        if (!el.userData?.ifcElement && !(isPickableModelMesh(el) && !hasIfcAncestor(el))) return;
         const key = elementKey(modelId, el);
         const hidden = hiddenElementKeys.has(key);
         const isolated = isolatedElementKeys ? !isolatedElementKeys.has(key) : false;
@@ -1044,7 +1054,7 @@ export function ModelViewerCanvas({ url }: ModelViewerProps) {
         dampingFactor={0.1}
         minDistance={0.05}
         maxDistance={50}
-        enabled={!positionMode && !selectionMode}
+        enabled={!positionMode}
       />
 
     </Canvas>

src/stores/useModelStore.ts

@@ -514,7 +514,7 @@ export const useModelStore = create<ModelStore>((set, get) => ({
   setSelectionMode: (on) => set((s) => ({
     selectionMode: on,
     measureMode: on ? false : s.measureMode,
-    positionMode: on ? false : s.positionMode,
+    positionMode: s.positionMode,
     selectedElementKeys: on ? s.selectedElementKeys : new Set(),
   })),
   selectedElementKeys: new Set<string>(),