Refactor: Move vertex group names to object data

This commit moves the storage of `bDeformGroup` and the active index
to `Mesh`, `Lattice`, and `bGPdata` instead of `Object`. Utility
functions are added to allow easy access to the vertex groups given
an object or an ID.

As explained in T88951, the list of vertex group names is currently
stored separately per object, even though vertex group data is stored
on the geometry. This tends to complicate code and cause bugs,
especially as geometry is created procedurally and tied less closely
to an object.

The "Copy Vertex Groups to Linked" operator is removed, since they
are stored on the geometry anyway.

This patch leaves the object-level python API for vertex groups in
place. Creating a geometry-level RNA API can be a separate step;
the changes in this commit are invasive enough as it is.

Note that opening a file saved in 3.0 in an earlier version means
the vertex groups will not be available.

Differential Revision: https://developer.blender.org/D11689

1 files changed, 0 insertions, 10 deletions

diff --git a/source/blender/blenkernel/BKE_geometry_set.hh b/source/blender/blenkernel/BKE_geometry_set.hh
index 82c9a31dfce..77e827bf6f2 100644
--- a/source/blender/blenkernel/BKE_geometry_set.hh
+++ b/source/blender/blenkernel/BKE_geometry_set.hh
@@ -325,10 +325,6 @@ class MeshComponent : public GeometryComponent {
  private:
   Mesh *mesh_ = nullptr;
   GeometryOwnershipType ownership_ = GeometryOwnershipType::Owned;
-  /* Due to historical design choices, vertex group data is stored in the mesh, but the vertex
-   * group names are stored on an object. Since we don't have an object here, we copy over the
-   * names into this map. */
-  blender::Map<std::string, int> vertex_group_names_;
 
  public:
   MeshComponent();
@@ -338,14 +334,8 @@ class MeshComponent : public GeometryComponent {
   void clear();
   bool has_mesh() const;
   void replace(Mesh *mesh, GeometryOwnershipType ownership = GeometryOwnershipType::Owned);
-  void replace_mesh_but_keep_vertex_group_names(
-      Mesh *mesh, GeometryOwnershipType ownership = GeometryOwnershipType::Owned);
   Mesh *release();
 
-  void copy_vertex_group_names_from_object(const struct Object &object);
-  const blender::Map<std::string, int> &vertex_group_names() const;
-  blender::Map<std::string, int> &vertex_group_names();
-
   const Mesh *get_for_read() const;
   Mesh *get_for_write();