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, 1 deletions

diff --git a/source/blender/blenkernel/intern/pointcloud.cc b/source/blender/blenkernel/intern/pointcloud.cc
index 82dde79cff6..35043edb3a3 100644
--- a/source/blender/blenkernel/intern/pointcloud.cc
+++ b/source/blender/blenkernel/intern/pointcloud.cc
@@ -261,8 +261,12 @@ PointCloud *BKE_pointcloud_new_nomain(const int totpoint)
   return pointcloud;
 }
 
-void BKE_pointcloud_minmax(const struct PointCloud *pointcloud, float r_min[3], float r_max[3])
+bool BKE_pointcloud_minmax(const struct PointCloud *pointcloud, float r_min[3], float r_max[3])
 {
+  if (!pointcloud->totpoint) {
+    return false;
+  }
+
   float(*pointcloud_co)[3] = pointcloud->co;
   float *pointcloud_radius = pointcloud->radius;
   for (int a = 0; a < pointcloud->totpoint; a++) {
@@ -273,6 +277,7 @@ void BKE_pointcloud_minmax(const struct PointCloud *pointcloud, float r_min[3],
     DO_MIN(co_min, r_min);
     DO_MAX(co_max, r_max);
   }
+  return true;
 }
 
 BoundBox *BKE_pointcloud_boundbox_get(Object *ob)