Parenting an object to a deformer (armature/curve/lattice) will now attempt to

check if the object is already parented to said deformer before trying to add a
new modifier

This should help reduce the number of cases where users inadvertantly end up
creating multiple deform modifiers pointing to the same object, which has been
known to be a cause of "double-transform" artifacts.

Note that this is only able to detect these cases by checking if the parent
object is selected, so this will only really work for the Ctrl-P shortcut where
you have to select both objects first. However, it shouldn't be a problem either
in the Outliner (drag and drop), as the object probably won't be a child of its
parent already if you're doing this.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_modifier.h b/source/blender/blenkernel/BKE_modifier.h
index 3b675f3b620..7ee1c85d0de 100644
--- a/source/blender/blenkernel/BKE_modifier.h
+++ b/source/blender/blenkernel/BKE_modifier.h
@@ -352,6 +352,7 @@ int           modifiers_isParticleEnabled(struct Object *ob);
 
 struct Object *modifiers_isDeformedByArmature(struct Object *ob);
 struct Object *modifiers_isDeformedByLattice(struct Object *ob);
+struct Object *modifiers_isDeformedByCurve(struct Object *ob);
 int           modifiers_usesArmature(struct Object *ob, struct bArmature *arm);
 int           modifiers_isCorrectableDeformed(struct Object *ob);
 void          modifier_freeTemporaryData(struct ModifierData *md);