Fix T63252: Bind in Mesh Deform Modifier fails

A regression since 64c8d72ef1ad.

The solution is to force modifier evaluation for an evaluated
object, and let it to copy binding data back to original when
is being evaluated for binding.

Reviewers: brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D4642

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/modifier.c b/source/blender/blenkernel/intern/modifier.c
index fe955ced5f5..8f52e579a91 100644
--- a/source/blender/blenkernel/intern/modifier.c
+++ b/source/blender/blenkernel/intern/modifier.c
@@ -885,3 +885,23 @@ Mesh *BKE_modifier_get_evaluated_mesh_from_evaluated_object(Object *ob_eval, con
 
 	return me;
 }
+
+ModifierData *modifier_get_original(ModifierData *md)
+{
+	if (md->orig_modifier_data == NULL) {
+		return md;
+	}
+	return md->orig_modifier_data;
+}
+
+struct ModifierData *modifier_get_evaluated(
+        Depsgraph* depsgraph,
+        Object *object,
+        ModifierData *md)
+{
+	Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
+	if (object_eval == object) {
+		return md;
+	}
+	return modifiers_findByName(object_eval, md->name);
+}