1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#====================== 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.
#
#======================= END GPL LICENSE BLOCK ========================
# <pep8 compliant>
import bpy
#=============================================
# Collection management
#=============================================
def find_layer_collection_by_collection(layer_collection, collection):
if collection == layer_collection.collection:
return layer_collection
# go recursive
for child in layer_collection.children:
layer_collection = find_layer_collection_by_collection(child, collection)
if layer_collection:
return layer_collection
def list_layer_collections(layer_collection, visible=False, selectable=False):
"""Returns a list of the collection and its children, with optional filtering by settings."""
if layer_collection.exclude:
return []
collection = layer_collection.collection
is_visible = not (layer_collection.hide_viewport or collection.hide_viewport)
is_selectable = is_visible and not collection.hide_select
if (selectable and not is_selectable) or (visible and not is_visible):
return []
found = [layer_collection]
for child in layer_collection.children:
found += list_layer_collections(child, visible, selectable)
return found
def filter_layer_collections_by_object(layer_collections, obj):
"""Returns a subset of collections that contain the given object."""
return [lc for lc in layer_collections if obj in lc.collection.objects.values()]
def ensure_collection(context, collection_name, hidden=False) -> bpy.types.Collection:
"""Check if a collection with a certain name exists.
If yes, return it, if not, create it in the scene root collection.
"""
view_layer = context.view_layer
active_layer_coll = bpy.context.layer_collection
active_collection = active_layer_coll.collection
collection = bpy.data.collections.get(collection_name)
if not collection:
# Create the collection
collection = bpy.data.collections.new(collection_name)
collection.hide_viewport = hidden
collection.hide_render = hidden
layer_collection = None
else:
layer_collection = find_layer_collection_by_collection(view_layer.layer_collection, collection)
if not layer_collection:
# Let the new collection be a child of the active one.
active_collection.children.link(collection)
layer_collection = [c for c in active_layer_coll.children if c.collection == collection][0]
layer_collection.exclude = True
# Make the new collection active.
view_layer.active_layer_collection = layer_collection
return collection
|
