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, 2 insertions, 2 deletions

diff --git a/source/blender/editors/object/object_modifier.c b/source/blender/editors/object/object_modifier.c
index 240fb8017f2..913e5893a77 100644
--- a/source/blender/editors/object/object_modifier.c
+++ b/source/blender/editors/object/object_modifier.c
@@ -452,7 +452,7 @@ static int modifier_apply_shape(ReportList *reports, Scene *scene, Object *ob, M
 		Key *key=me->key;
 		KeyBlock *kb;
 		
-		if(!modifier_sameTopology(md)) {
+		if(!modifier_sameTopology(md) || mti->type == eModifierTypeType_NonGeometrical) {
 			BKE_report(reports, RPT_ERROR, "Only deforming modifiers can be applied to Shapes");
 			return 0;
 		}
@@ -500,7 +500,7 @@ static int modifier_apply_obdata(ReportList *reports, Scene *scene, Object *ob,
 		Mesh *me = ob->data;
 		MultiresModifierData *mmd= find_multires_modifier_before(scene, md);
 
-		if( me->key) {
+		if(me->key && mti->type != eModifierTypeType_NonGeometrical) {
 			BKE_report(reports, RPT_ERROR, "Modifier cannot be applied to Mesh with Shape Keys");
 			return 0;
 		}