Collections and groups unification

OVERVIEW

* In 2.7 terminology, all layers and groups are now collection datablocks.
* These collections are nestable, linkable, instanceable, overrideable, ..
  which opens up new ways to set up scenes and link + override data.
* Viewport/render visibility and selectability are now a part of the collection
  and shared across all view layers and linkable.
* View layers define which subset of the scene collection hierarchy is excluded
  for each. For many workflows one view layer can be used, these are more of an
  advanced feature now.

OUTLINER

* The outliner now has a "View Layer" display mode instead of "Collections",
  which can display the collections and/or objects in the view layer.
* In this display mode, collections can be excluded with the right click menu.
  These will then be greyed out and their objects will be excluded.
* To view collections not linked to any scene, the "Blender File" display mode
  can be used, with the new filtering option to just see Colleciton datablocks.
* The outliner right click menus for collections and objects were reorganized.
* Drag and drop still needs to be improved. Like before, dragging the icon or
  text gives different results, we'll unify this later.

LINKING AND OVERRIDES

* Collections can now be linked into the scene without creating an instance,
  with the link/append operator or from the collections view in the outliner.
* Collections can get static overrides with the right click menu in the outliner,
  but this is rather unreliable and not clearly communicated at the moment.
* We still need to improve the make override operator to turn collection instances
  into collections with overrides directly in the scene.

PERFORMANCE

* We tried to make performance not worse than before and improve it in some
  cases. The main thing that's still a bit slower is multiple scenes, we have to
  change the layer syncing to only updated affected scenes.
* Collections keep a list of their parent collections for faster incremental
  updates in syncing and caching.
* View layer bases are now in a object -> base hash to avoid quadratic time
  lookups internally and in API functions like visible_get().

VERSIONING

* Compatibility with 2.7 files should be improved due to the new visibility
  controls. Of course users may not want to set up their scenes differently
  now to avoid having separate layers and groups.
* Compatibility with 2.8 is mostly there, and was tested on Eevee demo and Hero
  files. There's a few things which are know to be not quite compatible, like
  nested layer collections inside groups.
* The versioning code for 2.8 files is quite complicated, and isolated behind
  #ifdef so it can be removed at the end of the release cycle.

KNOWN ISSUES

* The G-key group operators in the 3D viewport were left mostly as is, they
  need to be modified still to fit better.
* Same for the groups panel in the object properties. This needs to be updated
  still, or perhaps replaced by something better.
* Collections must all have a unique name. Less restrictive namespacing is to
  be done later, we'll have to see how important this is as all objects within
  the collections must also have a unique name anyway.
* Full scene copy and delete scene are exactly doing the right thing yet.

Differential Revision: https://developer.blender.org/D3383

https://code.blender.org/2018/05/collections-and-groups/

1 files changed, 0 insertions, 85 deletions

diff --git a/source/blender/blenkernel/BKE_group.h b/source/blender/blenkernel/BKE_group.h
deleted file mode 100644
index 0195d1f1243..00000000000
--- a/source/blender/blenkernel/BKE_group.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * ***** BEGIN GPL LICENSE BLOCK *****
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
- * All rights reserved.
- *
- * The Original Code is: all of this file.
- *
- * Contributor(s): none yet.
- *
- * ***** END GPL LICENSE BLOCK *****
- */
-#ifndef __BKE_GROUP_H__
-#define __BKE_GROUP_H__
-
-/** \file BKE_group.h
- *  \ingroup bke
- *  \since March 2001
- *  \author nzc
- */
-
-struct Base;
-struct Depsgraph;
-struct Group;
-struct Main;
-struct Object;
-struct Scene;
-
-void          BKE_group_free(struct Group *group);
-void          BKE_group_init(struct Group *group);
-struct Group *BKE_group_add(struct Main *bmain, const char *name);
-void          BKE_group_copy_data(struct Main *bmain, struct Group *group_dst, const struct Group *group_src, const int flag);
-struct Group *BKE_group_copy(struct Main *bmain, const struct Group *group);
-void          BKE_group_make_local(struct Main *bmain, struct Group *group, const bool lib_local);
-bool          BKE_group_object_add(struct Group *group, struct Object *ob);
-bool          BKE_group_object_unlink(struct Group *group, struct Object *ob);
-struct Group *BKE_group_object_find(struct Group *group, struct Object *ob);
-bool          BKE_group_object_exists(struct Group *group, struct Object *ob);
-bool          BKE_group_object_cyclic_check(struct Main *bmain, struct Object *object, struct Group *group);
-bool          BKE_group_is_animated(struct Group *group, struct Object *parent);
-
-void          BKE_group_handle_recalc_and_update(struct Depsgraph *depsgraph, struct Scene *scene, struct Object *parent, struct Group *group);
-
-/* Dependency graph evaluation. */
-
-void BKE_group_eval_view_layers(struct Depsgraph *depsgraph,
-                                struct Group *group);
-
-/* Helper macros. */
-
-#define FOREACH_GROUP_BASE_BEGIN(_group, _base)                   \
-	for (Base *_base = (Base *)(_group)->view_layer->object_bases.first; \
-	     _base;                                                   \
-	     _base = _base->next)                                     \
-	{
-
-#define FOREACH_GROUP_BASE_END                                    \
-	}
-
-#define FOREACH_GROUP_OBJECT_BEGIN(_group, _object)               \
-	for (Base *_base = (Base *)(_group)->view_layer->object_bases.first; \
-	     _base;                                                   \
-	     _base = _base->next)                                     \
-	{                                                             \
-		Object *_object = _base->object;                          \
-		BLI_assert(_object != NULL);
-
-#define FOREACH_GROUP_OBJECT_END                                  \
-	} ((void)0)
-
-#endif  /* __BKE_GROUP_H__ */