New modifier type: eModifierTypeType_NonGeometrical, for modifiers affecting CustomData layers only (e.g. UVProject and WeightVG ones).

Also, allow applying to obdata those modifiers, even with shapekeys, but do not allow applying them *as* shapekey (as shapekeys do not have CD layers).

Fix [#29636] Vertex Weight Mix modifier "apply" button don't work.

Note: applying whit shape keys currently always uses base shape, not current one (for apply to obdata as well as apply to shapekey), but this is another topic...

1 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/modifier.c b/source/blender/blenkernel/intern/modifier.c
index f09be8c34ad..5a389019519 100644
--- a/source/blender/blenkernel/intern/modifier.c
+++ b/source/blender/blenkernel/intern/modifier.c
@@ -239,7 +239,14 @@ int modifier_couldBeCage(struct Scene *scene, ModifierData *md)
 int modifier_sameTopology(ModifierData *md)
 {
 	ModifierTypeInfo *mti = modifierType_getInfo(md->type);
-	return ( mti->type == eModifierTypeType_OnlyDeform || mti->type == eModifierTypeType_Nonconstructive);
+	return ELEM3(mti->type, eModifierTypeType_OnlyDeform, eModifierTypeType_Nonconstructive,
+	             eModifierTypeType_NonGeometrical);
+}
+
+int modifier_nonGeometrical(ModifierData *md)
+{
+	ModifierTypeInfo *mti = modifierType_getInfo(md->type);
+	return (mti->type == eModifierTypeType_NonGeometrical);
 }
 
 void modifier_setError(ModifierData *md, const char *format, ...)