Fix T94113: Local view + Geometry Nodes is broken for instances

`GeometrySet::compute_boundbox_without_instances` may not initialize min
max in some cases such as meshes without vertices.

This can result in a Bounding Box with impossible dimensions
(min=FLT_MAX, max=-FLT_MAX).

So repeat the same solution seen in `BKE_object_boundbox_calc_from_mesh`
and set boundbox values to zero.

Reviewed By: HooglyBoogly

Differential Revision: https://developer.blender.org/D13664

1 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/object.cc b/source/blender/blenkernel/intern/object.cc
index d08ea74d2c6..5045851d7f9 100644
--- a/source/blender/blenkernel/intern/object.cc
+++ b/source/blender/blenkernel/intern/object.cc
@@ -3918,11 +3918,15 @@ bool BKE_object_boundbox_calc_from_evaluated_geometry(Object *ob)
   INIT_MINMAX(min, max);
 
   if (ob->runtime.geometry_set_eval) {
-    ob->runtime.geometry_set_eval->compute_boundbox_without_instances(&min, &max);
+    if (!ob->runtime.geometry_set_eval->compute_boundbox_without_instances(&min, &max)) {
+      zero_v3(min);
+      zero_v3(max);
+    }
   }
   else if (const Mesh *mesh_eval = BKE_object_get_evaluated_mesh(ob)) {
     if (!BKE_mesh_wrapper_minmax(mesh_eval, min, max)) {
-      return false;
+      zero_v3(min);
+      zero_v3(max);
     }
   }
   else if (ob->runtime.curve_cache) {