Fix T65798: Incorrect auto-tex space for Curves

There are several aspects to the fix:

- Always calculate bounding box for meshes and curves from dependency
  graph evaluation function.

  There is a reason why mesh was tagged for geometry update, so can not
  be spare here in attempts to avoid calculation.

- Remove texture space evaluation from RNA accessor.

  Such data is to be evaluated by a dependency graph.

  Don't see a reason to be different here: we never force evaluation of
  any kind from RNA.

- Copy bounding box and texture space to original object for active
  dependency graph.

  This matches object-level bounding box and allows to remove bounding
  box evaluation from RNA.

1 files changed, 13 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/curve.c b/source/blender/blenkernel/intern/curve.c
index 5945fa4bf33..0fb6b8005d4 100644
--- a/source/blender/blenkernel/intern/curve.c
+++ b/source/blender/blenkernel/intern/curve.c
@@ -54,6 +54,7 @@
 #include "BKE_material.h"
 
 #include "DEG_depsgraph.h"
+#include "DEG_depsgraph_query.h"
 
 #include "CLG_log.h"
 
@@ -5431,8 +5432,18 @@ void BKE_curve_rect_from_textbox(const struct Curve *cu,
 void BKE_curve_eval_geometry(Depsgraph *depsgraph, Curve *curve)
 {
   DEG_debug_print_eval(depsgraph, __func__, curve->id.name, curve);
-  if (curve->bb == NULL || (curve->bb->flag & BOUNDBOX_DIRTY)) {
-    BKE_curve_texspace_calc(curve);
+  BKE_curve_texspace_calc(curve);
+  if (DEG_is_active(depsgraph)) {
+    Curve *curve_orig = (Curve *)DEG_get_original_id(&curve->id);
+    BoundBox *bb = curve->bb;
+    if (bb != NULL) {
+      if (curve_orig->bb == NULL) {
+        curve_orig->bb = MEM_mallocN(sizeof(*curve_orig->bb), __func__);
+      }
+      *curve_orig->bb = *bb;
+      copy_v3_v3(curve_orig->loc, curve->loc);
+      copy_v3_v3(curve_orig->size, curve->size);
+    }
   }
 }