Removed MIT license file

Also added missing `files` permission

.github/workflows/main.yml

@@ -0,0 +1,48 @@
+name: Build Extension
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+    
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      BLENDER_VERSION: blender-4.2.0-beta+v42.d19d23e91f65-linux.x86_64-release
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set derived environment variables
+        run: |
+          echo "BLENDER_FILENAME=${{ env.BLENDER_VERSION }}.tar.xz" >> $GITHUB_ENV
+          echo "BLENDER_URL=https://cdn.builder.blender.org/download/daily/${{ env.BLENDER_VERSION }}.tar.xz" >> $GITHUB_ENV
+      - name: Install Blender Dependencies
+        run: |
+          sudo apt-get install libxxf86vm-dev -y
+          sudo apt-get install libxfixes3 -y
+          sudo apt-get install libxi-dev -y
+          sudo apt-get install libxkbcommon-x11-0 -y
+          sudo apt-get install libgl1-mesa-glx -y
+      - name: Download & Extract Blender
+        run: |
+          wget -q $BLENDER_URL
+          tar -xf $BLENDER_FILENAME
+          rm -rf $BLENDER_FILENAME
+      - name: Add Blender executable to path
+        run: |
+          echo "${{ github.workspace }}/${{ env.BLENDER_VERSION }}/" >> $GITHUB_PATH
+      - name: Build extension
+        run: |
+          pushd ./io_scene_psk_psa
+          blender --command extension build
+          mkdir artifact
+          unzip -q io_scene_psk_psa.zip -d ./artifact
+          popd
+      - name: Archive addon
+        uses: actions/upload-artifact@v4
+        with:
+          name: io_scene_psk_psa-${{ github.ref_name }}-${{ github.sha }}
+          path: |
+            ./io_scene_psk_psa/artifact/*

COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
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+option of following the terms and conditions either of that numbered
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+
+  If the Program specifies that a proxy can decide which future
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+  Later license versions may give you additional or different
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+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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 3 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, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2019 Darklight Games
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

README.md

@@ -1,16 +1,20 @@
 [![Blender](https://img.shields.io/badge/Blender->=2.9-blue?logo=blender&logoColor=white)](https://www.blender.org/download/ "Download Blender")
 [![GitHub release](https://img.shields.io/github/release/DarklightGames/io_scene_psk_psa?include_prereleases=&sort=semver&color=blue)](https://github.com/DarklightGames/io_scene_psk_psa/releases/)
+[![Build Extension](https://github.com/DarklightGames/io_scene_psk_psa/actions/workflows/main.yml/badge.svg)](https://github.com/DarklightGames/io_scene_psk_psa/actions/workflows/main.yml)
 
 [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/L4L3853VR)
 
 This Blender addon allows you to import and export meshes and animations to and from the [PSK and PSA file formats](https://wiki.beyondunreal.com/PSK_%26_PSA_file_formats) used in many versions of the Unreal Engine.
 
-## Compatibility
+This software is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.html) license.
 
-| Blender Version                                              | Addon Version                                                                  | Long Term Support |
+# Compatibility
-|--------------------------------------------------------------|--------------------------------------------------------------------------------|-------------------|
+
-| 4.0+                                                         | [latest](https://github.com/DarklightGames/io_scene_psk_psa/releases/latest)   | TBD               |
+| Blender Version | Addon Version | Long Term Support |
-| [3.4 - 3.6](https://www.blender.org/download/lts/3-6/)       | [5.0.6](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/5.0.6) | ✅️ June 2025      |
+|-|-|-|
+| [4.1](https://www.blender.org/download/releases/4-1/) | [latest](https://github.com/DarklightGames/io_scene_psk_psa/releases/latest)   | TBD |
+| [4.0](https://www.blender.org/download/releases/4-0/) | [6.2.1](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/6.2.1) | TBD |
+| [3.4 - 3.6](https://www.blender.org/download/lts/3-6/) | [5.0.6](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/5.0.6) | ✅️ June 2025 |
 | [2.93 - 3.3](https://www.blender.org/download/releases/3-3/) | [4.3.0](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/4.3.0) | ✅️ September 2024 |
 
 Bug fixes will be issued for legacy addon versions that are under [Blender's LTS maintenance period](https://www.blender.org/download/lts/). Once the LTS period has ended, legacy addon versions will no longer be supported by the maintainers of this repository, although we will accept pull requests for bug fixes. 

build.py

@@ -1,41 +0,0 @@
-import os
-import subprocess
-from fnmatch import fnmatch
-from zipfile import ZipFile, ZIP_DEFLATED
-
-ignore_patterns = [
-    '*/__pycache__/*',
-    '*/.git/*',
-    '*/.github/*',
-    '*/.idea/*',
-    '*/venv/*',
-    '*/.gitignore',
-    '*/.gitattributes',
-    '*/build/*',
-    '*/build.py',
-]
-
-
-def zipdir(path, zip_file: ZipFile):
-    for root, dirs, files in os.walk(path):
-        for file in files:
-            if file != zip_file.filename and not any(fnmatch(os.path.join(root, file), pattern) for pattern in ignore_patterns):
-                zip_file.write(os.path.join(root, file))
-
-# Get the branch name.
-branch = subprocess.check_output(['git', 'rev-parse', '--abbrev-ref', 'HEAD']).decode('utf-8').strip()
-
-# Get the most recent tag.
-tag = subprocess.check_output(['git', 'describe', '--tags', '--abbrev=0']).decode('utf-8').strip()
-
-# Create a zip file of the current directory.
-
-zip_path = f'./build/io_scene_psk_psa-{branch}-{tag}.zip'
-
-# Check that the directory exists, if it doesn't, create it.
-if not os.path.exists('./build'):
-    os.makedirs('./build')
-
-zipf = ZipFile(zip_path, 'w', ZIP_DEFLATED)
-zipdir('.', zipf)
-zipf.close()

io_scene_psk_psa/__init__.py

@@ -1,23 +1,11 @@
 from bpy.app.handlers import persistent
 
-bl_info = {
-    'name': 'PSK/PSA Importer/Exporter',
-    'author': 'Colin Basnett, Yurii Ti',
-    'version': (6, 2, 1),
-    'blender': (4, 0, 0),
-    'description': 'PSK/PSA Import/Export (.psk/.psa)',
-    'warning': '',
-    'doc_url': 'https://github.com/DarklightGames/io_scene_psk_psa',
-    'tracker_url': 'https://github.com/DarklightGames/io_scene_psk_psa/issues',
-    'category': 'Import-Export'
-}
-
 if 'bpy' in locals():
     import importlib
 
-    importlib.reload(psx_data)
+    importlib.reload(shared_data)
-    importlib.reload(psx_helpers)
+    importlib.reload(shared_helpers)
-    importlib.reload(psx_types)
+    importlib.reload(shared_types)
 
     importlib.reload(psk_data)
     importlib.reload(psk_reader)
@@ -44,39 +32,30 @@ if 'bpy' in locals():
     importlib.reload(psa_import_operators)
     importlib.reload(psa_import_ui)
 else:
-    # if i remove this line, it can be enabled just fine
+    from .shared import data as shared_data, types as shared_types, helpers as shared_helpers
-    from . import data as psx_data
+    from .psk import data as psk_data, builder as psk_builder, writer as psk_writer, \
-    from . import helpers as psx_helpers
+    importer as psk_importer, properties as psk_properties
-    from . import types as psx_types
+    from .psk import reader as psk_reader, ui as psk_ui
-    from .psk import data as psk_data
+    from .psk.export import properties as psk_export_properties, ui as psk_export_ui, \
-    from .psk import reader as psk_reader
+        operators as psk_export_operators
-    from .psk import writer as psk_writer
-    from .psk import builder as psk_builder
-    from .psk import importer as psk_importer
-    from .psk import properties as psk_properties
-    from .psk import ui as psk_ui
-    from .psk.export import properties as psk_export_properties
-    from .psk.export import operators as psk_export_operators
-    from .psk.export import ui as psk_export_ui
     from .psk.import_ import operators as psk_import_operators
 
-    from .psa import data as psa_data
+    from .psa import config as psa_config, data as psa_data, writer as psa_writer, reader as psa_reader, \
-    from .psa import config as psa_config
+        builder as psa_builder, importer as psa_importer
-    from .psa import reader as psa_reader
+    from .psa.export import properties as psa_export_properties, ui as psa_export_ui, \
-    from .psa import writer as psa_writer
+        operators as psa_export_operators
-    from .psa import builder as psa_builder
-    from .psa import importer as psa_importer
-    from .psa.export import properties as psa_export_properties
-    from .psa.export import operators as psa_export_operators
-    from .psa.export import ui as psa_export_ui
-    from .psa.import_ import properties as psa_import_properties
     from .psa.import_ import operators as psa_import_operators
-    from .psa.import_ import ui as psa_import_ui
+    from .psa.import_ import ui as psa_import_ui, properties as psa_import_properties
 
 import bpy
 from bpy.props import PointerProperty
 
-classes = psx_types.classes +\
+# TODO: just here so that it's not unreferenced and removed on save.
+if [shared_data, shared_helpers, psk_data, psk_reader, psk_writer, psk_builder, psk_importer, psa_data, psa_config,
+    psa_reader, psa_writer, psa_builder, psa_importer]:
+    pass
+
+classes = shared_types.classes +\
           psk_properties.classes +\
           psk_ui.classes +\
           psk_import_operators.classes +\
@@ -118,7 +97,7 @@ def register():
     bpy.types.Scene.psa_import = PointerProperty(type=psa_import_properties.PSA_PG_import)
     bpy.types.Scene.psa_export = PointerProperty(type=psa_export_properties.PSA_PG_export)
     bpy.types.Scene.psk_export = PointerProperty(type=psk_export_properties.PSK_PG_export)
-    bpy.types.Action.psa_export = PointerProperty(type=psx_types.PSX_PG_action_export)
+    bpy.types.Action.psa_export = PointerProperty(type=shared_types.PSX_PG_action_export)
 
 
 def unregister():

io_scene_psk_psa/blender_manifest.toml

@@ -0,0 +1,27 @@
+schema_version = "1.0.0"
+id = "io_scene_psk_psa"
+version = "7.1.0"
+name = "Unreal PSK/PSA (.psk/.psa)"
+tagline = "Import and export PSK and PSA files used in Unreal Engine"
+maintainer = "Colin Basnett <cmbasnett@gmail.com>"
+type = "add-on"
+website = "https://github.com/DarklightGames/io_scene_psk_psa/"
+tags = ["Game Engine", "Import-Export"]
+blender_version_min = "4.2.0"
+# Optional: maximum supported Blender version
+# blender_version_max = "5.1.0"
+license = [
+  "SPDX:GPL-3.0-or-later",
+]
+
+[build]
+paths_exclude_pattern = [
+  "/.git/",
+  "__pycache__/",
+  "/venv/",
+  "/.github/",
+  ".gitignore",
+]
+
+[permissions]
+files = "Import/export PSK and PSA files from/to disk"

io_scene_psk_psa/psa/builder.py

@@ -3,7 +3,7 @@ from typing import Optional
 from bpy.types import Armature, Bone, Action, PoseBone
 
 from .data import *
-from ..helpers import *
+from ..shared.helpers import *
 
 
 class PsaBuildSequence:

io_scene_psk_psa/psa/config.py

@@ -14,7 +14,7 @@ class PsaConfig:
 
 
 def _load_config_file(file_path: str) -> ConfigParser:
-    '''
+    """
     UEViewer exports a dialect of INI files that is not compatible with Python's ConfigParser.
     Specifically, it allows values in this format:
 
@@ -24,7 +24,7 @@ def _load_config_file(file_path: str) -> ConfigParser:
 
     This is not allowed in Python's ConfigParser, which requires a '=' character after each key name.
     To work around this, we'll modify the file to add the '=' character after each key name if it is missing.
-    '''
+    """
     with open(file_path, 'r') as f:
         lines = f.read().split('\n')
 
@@ -41,7 +41,7 @@ def _load_config_file(file_path: str) -> ConfigParser:
 def _get_bone_flags_from_value(value: str) -> int:
     match value:
         case 'all':
-            return (REMOVE_TRACK_LOCATION | REMOVE_TRACK_ROTATION)
+            return REMOVE_TRACK_LOCATION | REMOVE_TRACK_ROTATION
         case 'trans':
             return REMOVE_TRACK_LOCATION
         case 'rot':

io_scene_psk_psa/psa/data.py

@@ -2,7 +2,7 @@ import typing
 from collections import OrderedDict
 from typing import List
 
-from ..data import *
+from ..shared.data import *
 
 '''
 Note that keys are not stored within the Psa object.

io_scene_psk_psa/psa/export/operators.py

@@ -11,7 +11,7 @@ from bpy_types import Operator
 from .properties import PSA_PG_export, PSA_PG_export_action_list_item, filter_sequences
 from ..builder import build_psa, PsaBuildSequence, PsaBuildOptions
 from ..writer import write_psa
-from ...helpers import populate_bone_collection_list, get_nla_strips_in_frame_range
+from ...shared.helpers import populate_bone_collection_list, get_nla_strips_in_frame_range
 
 
 def is_action_for_armature(armature: Armature, action: Action):
@@ -62,7 +62,7 @@ def update_actions_and_timeline_markers(context: Context, armature: Armature):
         for pose_marker_index, pose_marker in enumerate(pose_markers):
             if pose_marker.name.strip() == '' or pose_marker.name.startswith('#'):
                 continue
-            for (name, frame_start, frame_end) in get_sequences_from_action_pose_marker(action, pose_markers, pose_marker, pose_marker_index):
+            for (name, frame_start, frame_end) in get_sequences_from_action_pose_markers(action, pose_markers, pose_marker, pose_marker_index):
                 item = pg.action_list.add()
                 item.action = action
                 item.name = name
@@ -91,15 +91,16 @@ def update_actions_and_timeline_markers(context: Context, armature: Armature):
 
 
 def get_sequence_fps(context: Context, fps_source: str, fps_custom: float, actions: Iterable[Action]) -> float:
-    if fps_source == 'SCENE':
+    match fps_source:
-        return context.scene.render.fps
+        case 'SCENE':
-    elif fps_source == 'CUSTOM':
+            return context.scene.render.fps
-        return fps_custom
+        case 'CUSTOM':
-    elif fps_source == 'ACTION_METADATA':
+            return fps_custom
-        # Get the minimum value of action metadata FPS values.
+        case 'ACTION_METADATA':
-        return min([action.psa_export.fps for action in actions])
+            # Get the minimum value of action metadata FPS values.
-    else:
+            return min([action.psa_export.fps for action in actions])
-        raise RuntimeError(f'Invalid FPS source "{fps_source}"')
+        case _:
+            raise RuntimeError(f'Invalid FPS source "{fps_source}"')
 
 
 def get_animation_data_object(context: Context) -> Object:
@@ -187,13 +188,18 @@ def get_sequences_from_action(action: Action) -> List[Tuple[str, int, int]]:
     return get_sequences_from_name_and_frame_range(action.name, frame_start, frame_end)
 
 
-def get_sequences_from_action_pose_marker(action: Action, pose_markers: List[TimelineMarker], pose_marker: TimelineMarker, pose_marker_index: int) -> List[Tuple[str, int, int]]:
+def get_sequences_from_action_pose_markers(action: Action, pose_markers: List[TimelineMarker], pose_marker: TimelineMarker, pose_marker_index: int) -> List[Tuple[str, int, int]]:
     frame_start = pose_marker.frame
-    if pose_marker_index + 1 < len(pose_markers):
+    sequence_name = pose_marker.name
+    if pose_marker.name.startswith('!'):
+        # If the pose marker name starts with an exclamation mark, only export the first frame.
+        frame_end = frame_start
+        sequence_name = sequence_name[1:]
+    elif pose_marker_index + 1 < len(pose_markers):
         frame_end = pose_markers[pose_marker_index + 1].frame
     else:
         frame_end = int(action.frame_range[1])
-    return get_sequences_from_name_and_frame_range(pose_marker.name, frame_start, frame_end)
+    return get_sequences_from_name_and_frame_range(sequence_name, frame_start, frame_end)
 
 
 def get_visible_sequences(pg: PSA_PG_export, sequences) -> List[PSA_PG_export_action_list_item]:
@@ -390,6 +396,8 @@ class PSA_OT_export(Operator, ExportHelper):
                 export_sequence.nla_state.frame_start = nla_strip_item.frame_start
                 export_sequence.nla_state.frame_end = nla_strip_item.frame_end
                 export_sequence.fps = get_sequence_fps(context, pg.fps_source, pg.fps_custom, [nla_strip_item.action])
+                export_sequence.compression_ratio = nla_strip_item.action.psa_export.compression_ratio
+                export_sequence.key_quota = nla_strip_item.action.psa_export.key_quota
                 export_sequences.append(export_sequence)
         else:
             raise ValueError(f'Unhandled sequence source: {pg.sequence_source}')

io_scene_psk_psa/psa/export/properties.py

@@ -7,7 +7,7 @@ from bpy.props import BoolProperty, PointerProperty, EnumProperty, FloatProperty
     StringProperty
 from bpy.types import PropertyGroup, Object, Action, AnimData, Context
 
-from ...types import PSX_PG_bone_collection_list_item
+from ...shared.types import PSX_PG_bone_collection_list_item
 
 
 def psa_export_property_group_animation_data_override_poll(_context, obj):
@@ -44,12 +44,13 @@ class PSA_PG_export_nla_strip_list_item(PropertyGroup):
 
 def nla_track_update_cb(self: 'PSA_PG_export', context: Context) -> None:
     self.nla_strip_list.clear()
-    if context.object is None or context.object.animation_data is None:
-        return
     match = re.match(r'^(\d+).+$', self.nla_track)
     self.nla_track_index = int(match.group(1)) if match else -1
     if self.nla_track_index >= 0:
-        nla_track = context.object.animation_data.nla_tracks[self.nla_track_index]
+        animation_data = get_animation_data(self, context)
+        if animation_data is None:
+            return
+        nla_track = animation_data.nla_tracks[self.nla_track_index]
         for nla_strip in nla_track.strips:
             strip: PSA_PG_export_nla_strip_list_item = self.nla_strip_list.add()
             strip.action = nla_strip.action

io_scene_psk_psa/psa/export/ui.py

@@ -32,7 +32,6 @@ class PSA_UL_export_sequences(UIList):
         subrow = row.row(align=True)
         subrow.prop(pg, 'sequence_filter_name', text='')
         subrow.prop(pg, 'sequence_use_filter_invert', text='', icon='ARROW_LEFTRIGHT')
-        # subrow.prop(pg, 'sequence_use_filter_sort_reverse', text='', icon='SORT_ASC')
 
         if pg.sequence_source == 'ACTIONS':
             subrow = row.row(align=True)
@@ -44,7 +43,6 @@ class PSA_UL_export_sequences(UIList):
         pg = getattr(context.scene, 'psa_export')
         actions = getattr(data, prop)
         flt_flags = filter_sequences(pg, actions)
-        # flt_neworder = bpy.types.UI_UL_list.sort_items_by_name(actions, 'name')
         flt_neworder = list(range(len(actions)))
         return flt_flags, flt_neworder
 

io_scene_psk_psa/psa/import_/operators.py

@@ -2,7 +2,7 @@ import os
 from pathlib import Path
 
 from bpy.props import StringProperty
-from bpy.types import Operator, Event, Context
+from bpy.types import Operator, Event, Context, FileHandler
 from bpy_extras.io_utils import ImportHelper
 
 from .properties import get_visible_sequences
@@ -89,23 +89,6 @@ class PSA_OT_import_sequences_deselect_all(Operator):
         return {'FINISHED'}
 
 
-class PSA_OT_import_select_file(Operator):
-    bl_idname = 'psa_import.select_file'
-    bl_label = 'Select'
-    bl_options = {'INTERNAL'}
-    bl_description = 'Select a PSA file from which to import animations'
-    filepath: StringProperty(subtype='FILE_PATH')
-    filter_glob: StringProperty(default='*.psa', options={'HIDDEN'})
-
-    def execute(self, context):
-        getattr(context.scene, 'psa_import').psa_file_path = self.filepath
-        return {'FINISHED'}
-
-    def invoke(self, context, event):
-        context.window_manager.fileselect_add(self)
-        return {'RUNNING_MODAL'}
-
-
 def load_psa_file(context, filepath: str):
     pg = context.scene.psa_import
     pg.sequence_list.clear()
@@ -207,67 +190,82 @@ class PSA_OT_import(Operator, ImportHelper):
         layout = self.layout
         pg = getattr(context.scene, 'psa_import')
 
-        if pg.psa_error:
+        sequences_header, sequences_panel = layout.panel('sequences_panel_id', default_closed=False)
-            row = layout.row()
+        sequences_header.label(text='Sequences')
-            row.label(text='Select a PSA file', icon='ERROR')
-        else:
-            box = layout.box()
 
-            box.label(text=f'Sequences ({len(pg.sequence_list)})', icon='ARMATURE_DATA')
+        if sequences_panel:
+            if pg.psa_error:
+                row = sequences_panel.row()
+                row.label(text='Select a PSA file', icon='ERROR')
+            else:
+                # Select buttons.
+                rows = max(3, min(len(pg.sequence_list), 10))
 
-            # Select buttons.
+                row = sequences_panel.row()
-            rows = max(3, min(len(pg.sequence_list), 10))
+                col = row.column()
 
-            row = box.row()
+                row2 = col.row(align=True)
-            col = row.column()
+                row2.label(text='Select')
+                row2.operator(PSA_OT_import_sequences_from_text.bl_idname, text='', icon='TEXT')
+                row2.operator(PSA_OT_import_sequences_select_all.bl_idname, text='All', icon='CHECKBOX_HLT')
+                row2.operator(PSA_OT_import_sequences_deselect_all.bl_idname, text='None', icon='CHECKBOX_DEHLT')
 
-            row2 = col.row(align=True)
+                col = col.row()
-            row2.label(text='Select')
+                col.template_list('PSA_UL_import_sequences', '', pg, 'sequence_list', pg, 'sequence_list_index', rows=rows)
-            row2.operator(PSA_OT_import_sequences_from_text.bl_idname, text='', icon='TEXT')
-            row2.operator(PSA_OT_import_sequences_select_all.bl_idname, text='All', icon='CHECKBOX_HLT')
-            row2.operator(PSA_OT_import_sequences_deselect_all.bl_idname, text='None', icon='CHECKBOX_DEHLT')
 
-            col = col.row()
+            col = sequences_panel.column(heading='')
-            col.template_list('PSA_UL_import_sequences', '', pg, 'sequence_list', pg, 'sequence_list_index', rows=rows)
-
-        col = layout.column(heading='')
-        col.use_property_split = True
-        col.use_property_decorate = False
-        col.prop(pg, 'should_overwrite')
-
-        col = layout.column(heading='Write')
-        col.use_property_split = True
-        col.use_property_decorate = False
-        col.prop(pg, 'should_write_keyframes')
-        col.prop(pg, 'should_write_metadata')
-
-        col = layout.column()
-        col.use_property_split = True
-        col.use_property_decorate = False
-        col.prop(pg, 'bone_mapping_mode')
-
-        if pg.should_write_keyframes:
-            col = layout.column(heading='Keyframes')
             col.use_property_split = True
             col.use_property_decorate = False
-            col.prop(pg, 'should_convert_to_samples')
-            col.separator()
-            # FPS
             col.prop(pg, 'fps_source')
             if pg.fps_source == 'CUSTOM':
                 col.prop(pg, 'fps_custom')
+            col.prop(pg, 'should_overwrite')
+            col.prop(pg, 'should_use_action_name_prefix')
+            if pg.should_use_action_name_prefix:
+                col.prop(pg, 'action_name_prefix')
 
-        col = layout.column(heading='Options')
+        data_header, data_panel = layout.panel('data_panel_id', default_closed=False)
-        col.use_property_split = True
+        data_header.label(text='Data')
-        col.use_property_decorate = False
-        col.prop(pg, 'should_use_fake_user')
-        col.prop(pg, 'should_stash')
-        col.prop(pg, 'should_use_config_file')
 
-        col.prop(pg, 'should_use_action_name_prefix')
+        if data_panel:
+            col = data_panel.column(heading='Write')
+            col.use_property_split = True
+            col.use_property_decorate = False
+            col.prop(pg, 'should_write_keyframes')
+            col.prop(pg, 'should_write_metadata')
 
-        if pg.should_use_action_name_prefix:
+            if pg.should_write_keyframes:
-            col.prop(pg, 'action_name_prefix')
+                col = col.column(heading='Keyframes')
+                col.use_property_split = True
+                col.use_property_decorate = False
+                col.prop(pg, 'should_convert_to_samples')
+
+        advanced_header, advanced_panel = layout.panel('advanced_panel_id', default_closed=True)
+        advanced_header.label(text='Advanced')
+
+        if advanced_panel:
+            col = advanced_panel.column()
+            col.use_property_split = True
+            col.use_property_decorate = False
+            col.prop(pg, 'bone_mapping_mode')
+
+            col = advanced_panel.column(heading='Options')
+            col.use_property_split = True
+            col.use_property_decorate = False
+            col.prop(pg, 'should_use_fake_user')
+            col.prop(pg, 'should_stash')
+            col.prop(pg, 'should_use_config_file')
+
+
+class PSA_FH_import(FileHandler):
+    bl_idname = 'PSA_FH_import'
+    bl_label = 'File handler for Unreal PSA import'
+    bl_import_operator = 'psa_import.import'
+    bl_file_extensions = '.psa'
+
+    @classmethod
+    def poll_drop(cls, context: Context):
+        return context.area and context.area.type == 'VIEW_3D'
 
 
 classes = (
@@ -275,5 +273,5 @@ classes = (
     PSA_OT_import_sequences_deselect_all,
     PSA_OT_import_sequences_from_text,
     PSA_OT_import,
-    PSA_OT_import_select_file,
+    PSA_FH_import,
 )

io_scene_psk_psa/psa/import_/properties.py

@@ -76,19 +76,33 @@ class PSA_PG_import(PropertyGroup):
     )
     fps_source: EnumProperty(name='FPS Source', items=(
         ('SEQUENCE', 'Sequence', 'The sequence frame rate matches the original frame rate', 'ACTION', 0),
-        ('SCENE', 'Scene', 'The sequence frame rate dilates to match that of the scene', 'SCENE_DATA', 1),
+        ('SCENE', 'Scene', 'The sequence is resampled to the frame rate of the scene', 'SCENE_DATA', 1),
-        ('CUSTOM', 'Custom', 'The sequence frame rate dilates to match a custom frame rate', 2),
+        ('CUSTOM', 'Custom', 'The sequence is resampled to a custom frame rate', 2),
     ))
     fps_custom: FloatProperty(
         default=30.0,
         name='Custom FPS',
-        description='The frame rate to which the imported actions will be converted',
+        description='The frame rate to which the imported sequences will be resampled to',
         options=empty_set,
         min=1.0,
         soft_min=1.0,
         soft_max=60.0,
         step=100,
     )
+    compression_ratio_source: EnumProperty(name='Compression Ratio Source', items=(
+        ('ACTION', 'Action', 'The compression ratio is sourced from the action metadata', 'ACTION', 0),
+        ('CUSTOM', 'Custom', 'The compression ratio is set to a custom value', 1),
+    ))
+    compression_ratio_custom: FloatProperty(
+        default=1.0,
+        name='Custom Compression Ratio',
+        description='The compression ratio to apply to the imported sequences',
+        options=empty_set,
+        min=0.0,
+        soft_min=0.0,
+        soft_max=1.0,
+        step=0.0625,
+    )
 
 
 def filter_sequences(pg: PSA_PG_import, sequences) -> List[int]:

io_scene_psk_psa/psa/import_/ui.py

@@ -4,7 +4,7 @@ from bpy.types import UIList
 from .properties import filter_sequences
 
 
-class PSA_UL_sequences(UIList):
+class PSA_UL_sequences_mixin(UIList):
     def draw_item(self, context, layout, data, item, icon, active_data, active_property, index, flt_flag):
         row = layout.row(align=True)
         split = row.split(align=True, factor=0.75)
@@ -30,11 +30,15 @@ class PSA_UL_sequences(UIList):
         return flt_flags, flt_neworder
 
 
-class PSA_UL_import_sequences(PSA_UL_sequences, UIList):
+class PSA_UL_sequences(PSA_UL_sequences_mixin):
     pass
 
 
-class PSA_UL_import_actions(PSA_UL_sequences, UIList):
+class PSA_UL_import_sequences(PSA_UL_sequences_mixin):
+    pass
+
+
+class PSA_UL_import_actions(PSA_UL_sequences_mixin):
     pass
 
 

io_scene_psk_psa/psa/importer.py

@@ -46,16 +46,16 @@ def _calculate_fcurve_data(import_bone: ImportBone, key_data: typing.Iterable[fl
     key_location = Vector(key_data[4:])
     q = import_bone.post_rotation.copy()
     q.rotate(import_bone.original_rotation)
-    quat = q
+    rotation = q
     q = import_bone.post_rotation.copy()
     if import_bone.parent is None:
         q.rotate(key_rotation.conjugated())
     else:
         q.rotate(key_rotation)
-    quat.rotate(q.conjugated())
+    rotation.rotate(q.conjugated())
-    loc = key_location - import_bone.original_location
+    location = key_location - import_bone.original_location
-    loc.rotate(import_bone.post_rotation.conjugated())
+    location.rotate(import_bone.post_rotation.conjugated())
-    return quat.w, quat.x, quat.y, quat.z, loc.x, loc.y, loc.z
+    return rotation.w, rotation.x, rotation.y, rotation.z, location.x, location.y, location.z
 
 
 class PsaImportResult:
@@ -79,49 +79,48 @@ def _get_armature_bone_index_for_psa_bone(psa_bone_name: str, armature_bone_name
                 return armature_bone_index
     return None
 
+def _get_sample_frame_times(source_frame_count: int, frame_step: float) -> typing.Iterable[float]:
+    # TODO: for correctness, we should also emit the target frame time as well (because the last frame can be a
+    #  fractional frame).
+    time = 0.0
+    while time < source_frame_count - 1:
+        yield time
+        time += frame_step
+    yield source_frame_count - 1
 
-def _resample_sequence_data_matrix(sequence_data_matrix: np.ndarray, time_step: float = 1.0) -> np.ndarray:
+def _resample_sequence_data_matrix(sequence_data_matrix: np.ndarray, frame_step: float = 1.0) -> np.ndarray:
-    '''
+    """
     Resamples the sequence data matrix to the target frame count.
     @param sequence_data_matrix: FxBx7 matrix where F is the number of frames, B is the number of bones, and X is the
     number of data elements per bone.
-    @param target_frame_count: The number of frames to resample to.
+    @param frame_step: The step between frames in the resampled sequence.
     @return: The resampled sequence data matrix, or sequence_data_matrix if no resampling is necessary.
-    '''
+    """
-    def get_sample_times(source_frame_count: int, time_step: float) -> typing.Iterable[float]:
+    if frame_step == 1.0:
-        # TODO: for correctness, we should also emit the target frame time as well (because the last frame can be a
-        #  fractional frame).
-        time = 0.0
-        while time < source_frame_count - 1:
-            yield time
-            time += time_step
-        yield source_frame_count - 1
-
-    if time_step == 1.0:
         # No resampling is necessary.
         return sequence_data_matrix
 
     source_frame_count, bone_count = sequence_data_matrix.shape[:2]
-    sample_times = list(get_sample_times(source_frame_count, time_step))
+    sample_frame_times = list(_get_sample_frame_times(source_frame_count, frame_step))
-    target_frame_count = len(sample_times)
+    target_frame_count = len(sample_frame_times)
     resampled_sequence_data_matrix = np.zeros((target_frame_count, bone_count, 7), dtype=float)
 
-    for sample_index, sample_time in enumerate(sample_times):
+    for sample_frame_index, sample_frame_time in enumerate(sample_frame_times):
-        frame_index = int(sample_time)
+        frame_index = int(sample_frame_time)
-        if sample_time % 1.0 == 0.0:
+        if sample_frame_time % 1.0 == 0.0:
             # Sample time has no fractional part, so just copy the frame.
-            resampled_sequence_data_matrix[sample_index, :, :] = sequence_data_matrix[frame_index, :, :]
+            resampled_sequence_data_matrix[sample_frame_index, :, :] = sequence_data_matrix[frame_index, :, :]
         else:
             # Sample time has a fractional part, so interpolate between two frames.
             next_frame_index = frame_index + 1
             for bone_index in range(bone_count):
                 source_frame_1_data = sequence_data_matrix[frame_index, bone_index, :]
                 source_frame_2_data = sequence_data_matrix[next_frame_index, bone_index, :]
-                factor = sample_time - frame_index
+                factor = sample_frame_time - frame_index
                 q = Quaternion((source_frame_1_data[:4])).slerp(Quaternion((source_frame_2_data[:4])), factor)
                 q.normalize()
                 l = Vector(source_frame_1_data[4:]).lerp(Vector(source_frame_2_data[4:]), factor)
-                resampled_sequence_data_matrix[sample_index, bone_index, :] = q.w, q.x, q.y, q.z, l.x, l.y, l.z
+                resampled_sequence_data_matrix[sample_frame_index, bone_index, :] = q.w, q.x, q.y, q.z, l.x, l.y, l.z
 
     return resampled_sequence_data_matrix
 
@@ -285,7 +284,7 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
             # Resample the sequence data to the target FPS.
             # If the target frame count is the same as the source frame count, this will be a no-op.
             resampled_sequence_data_matrix = _resample_sequence_data_matrix(sequence_data_matrix,
-                                                                            time_step=sequence.fps / target_fps)
+                                                                            frame_step=sequence.fps / target_fps)
 
             # Write the keyframes out.
             # Note that the f-curve data consists of alternating time and value data.

io_scene_psk_psa/psa/reader.py

@@ -23,11 +23,11 @@ def _try_fix_cue4parse_issue_103(sequences) -> bool:
 
 
 class PsaReader(object):
-    '''
+    """
     This class reads the sequences and bone information immediately upon instantiation and holds onto a file handle.
     The keyframe data is not read into memory upon instantiation due to its potentially very large size.
     To read the key data for a particular sequence, call :read_sequence_keys.
-    '''
+    """
 
     def __init__(self, path):
         self.keys_data_offset: int = 0
@@ -43,11 +43,11 @@ class PsaReader(object):
         return self.psa.sequences
 
     def read_sequence_data_matrix(self, sequence_name: str) -> np.ndarray:
-        '''
+        """
         Reads and returns the data matrix for the given sequence.
         @param sequence_name: The name of the sequence.
         @return: An FxBx7 matrix where F is the number of frames, B is the number of bones.
-        '''
+        """
         sequence = self.psa.sequences[sequence_name]
         keys = self.read_sequence_keys(sequence_name)
         bone_count = len(self.bones)
@@ -60,12 +60,12 @@ class PsaReader(object):
         return matrix
 
     def read_sequence_keys(self, sequence_name: str) -> List[Psa.Key]:
-        '''
+        """
         Reads and returns the key data for a sequence.
 
         @param sequence_name: The name of the sequence.
         @return: A list of Psa.Keys.
-        '''
+        """
         # Set the file reader to the beginning of the keys data
         sequence = self.psa.sequences[sequence_name]
         data_size = sizeof(Psa.Key)

io_scene_psk_psa/psa/writer.py

@@ -2,7 +2,7 @@ from ctypes import Structure, sizeof
 from typing import Type
 
 from .data import Psa
-from ..data import Section
+from ..shared.data import Section
 
 
 def write_section(fp, name: bytes, data_type: Type[Structure] = None, data: list = None):

io_scene_psk_psa/psk/builder.py

@@ -7,7 +7,7 @@ from bpy.types import Armature, Material
 
 from .data import *
 from .properties import triangle_type_and_bit_flags_to_poly_flags
-from ..helpers import *
+from ..shared.helpers import *
 
 
 class PskInputObjects(object):
@@ -28,10 +28,8 @@ class PskBuildOptions(object):
 def get_psk_input_objects(context) -> PskInputObjects:
     input_objects = PskInputObjects()
     for selected_object in context.view_layer.objects.selected:
-        if selected_object.type != 'MESH':
+        if selected_object.type == 'MESH':
-            raise RuntimeError(f'Selected object "{selected_object.name}" is not a mesh')
+            input_objects.mesh_objects.append(selected_object)
-
-    input_objects.mesh_objects = context.view_layer.objects.selected
 
     if len(input_objects.mesh_objects) == 0:
         raise RuntimeError('At least one mesh must be selected')

io_scene_psk_psa/psk/data.py

@@ -1,6 +1,6 @@
 from typing import List
 
-from ..data import *
+from ..shared.data import *
 
 
 class Psk(object):

io_scene_psk_psa/psk/export/operators.py

@@ -4,7 +4,7 @@ from bpy_extras.io_utils import ExportHelper
 
 from ..builder import build_psk, PskBuildOptions, get_psk_input_objects
 from ..writer import write_psk
-from ...helpers import populate_bone_collection_list
+from ...shared.helpers import populate_bone_collection_list
 
 
 def is_bone_filter_mode_item_available(context, identifier):
@@ -121,37 +121,40 @@ class PSK_OT_export(Operator, ExportHelper):
         pg = getattr(context.scene, 'psk_export')
 
         # MESH
-        box = layout.box()
+        mesh_header, mesh_panel = layout.panel('01_mesh', default_closed=False)
-        box.label(text='Mesh', icon='MESH_DATA')
+        mesh_header.label(text='Mesh', icon='MESH_DATA')
-        box.prop(pg, 'use_raw_mesh_data')
+        if mesh_panel:
+            mesh_panel.prop(pg, 'use_raw_mesh_data')
 
         # BONES
-        box = layout.box()
+        bones_header, bones_panel = layout.panel('02_bones', default_closed=False)
-        box.label(text='Bones', icon='BONE_DATA')
+        bones_header.label(text='Bones', icon='BONE_DATA')
-        bone_filter_mode_items = pg.bl_rna.properties['bone_filter_mode'].enum_items_static
+        if bones_panel:
-        row = box.row(align=True)
+            bone_filter_mode_items = pg.bl_rna.properties['bone_filter_mode'].enum_items_static
-        for item in bone_filter_mode_items:
+            row = bones_panel.row(align=True)
-            identifier = item.identifier
+            for item in bone_filter_mode_items:
-            item_layout = row.row(align=True)
+                identifier = item.identifier
-            item_layout.prop_enum(pg, 'bone_filter_mode', item.identifier)
+                item_layout = row.row(align=True)
-            item_layout.enabled = is_bone_filter_mode_item_available(context, identifier)
+                item_layout.prop_enum(pg, 'bone_filter_mode', item.identifier)
+                item_layout.enabled = is_bone_filter_mode_item_available(context, identifier)
 
-        if pg.bone_filter_mode == 'BONE_COLLECTIONS':
+            if pg.bone_filter_mode == 'BONE_COLLECTIONS':
-            row = box.row()
+                row = bones_panel.row()
-            rows = max(3, min(len(pg.bone_collection_list), 10))
+                rows = max(3, min(len(pg.bone_collection_list), 10))
-            row.template_list('PSX_UL_bone_collection_list', '', pg, 'bone_collection_list', pg, 'bone_collection_list_index', rows=rows)
+                row.template_list('PSX_UL_bone_collection_list', '', pg, 'bone_collection_list', pg, 'bone_collection_list_index', rows=rows)
 
-        box.prop(pg, 'should_enforce_bone_name_restrictions')
+            bones_panel.prop(pg, 'should_enforce_bone_name_restrictions')
 
         # MATERIALS
-        box = layout.box()
+        materials_header, materials_panel = layout.panel('03_materials', default_closed=False)
-        box.label(text='Materials', icon='MATERIAL')
+        materials_header.label(text='Materials', icon='MATERIAL')
-        row = box.row()
+        if materials_panel:
-        rows = max(3, min(len(pg.bone_collection_list), 10))
+            row = materials_panel.row()
-        row.template_list('PSK_UL_materials', '', pg, 'material_list', pg, 'material_list_index', rows=rows)
+            rows = max(3, min(len(pg.bone_collection_list), 10))
-        col = row.column(align=True)
+            row.template_list('PSK_UL_materials', '', pg, 'material_list', pg, 'material_list_index', rows=rows)
-        col.operator(PSK_OT_material_list_move_up.bl_idname, text='', icon='TRIA_UP')
+            col = row.column(align=True)
-        col.operator(PSK_OT_material_list_move_down.bl_idname, text='', icon='TRIA_DOWN')
+            col.operator(PSK_OT_material_list_move_up.bl_idname, text='', icon='TRIA_UP')
+            col.operator(PSK_OT_material_list_move_down.bl_idname, text='', icon='TRIA_DOWN')
 
     def execute(self, context):
         pg = context.scene.psk_export

io_scene_psk_psa/psk/export/properties.py

@@ -1,8 +1,9 @@
 from bpy.props import EnumProperty, CollectionProperty, IntProperty, BoolProperty, PointerProperty
 from bpy.types import PropertyGroup, Material
 
-from ...types import PSX_PG_bone_collection_list_item
+from ...shared.types import PSX_PG_bone_collection_list_item
 
+empty_set = set()
 
 class PSK_PG_material_list_item(PropertyGroup):
     material: PointerProperty(type=Material)
@@ -12,7 +13,7 @@ class PSK_PG_material_list_item(PropertyGroup):
 class PSK_PG_export(PropertyGroup):
     bone_filter_mode: EnumProperty(
         name='Bone Filter',
-        options=set(),
+        options=empty_set,
         description='',
         items=(
             ('ALL', 'All', 'All bones will be exported'),

io_scene_psk_psa/psk/import_/operators.py

@@ -2,7 +2,7 @@ import os
 import sys
 
 from bpy.props import StringProperty, BoolProperty, EnumProperty, FloatProperty
-from bpy.types import Operator
+from bpy.types import Operator, FileHandler, Context
 from bpy_extras.io_utils import ImportHelper
 
 from ..importer import PskImportOptions, import_psk
@@ -11,6 +11,17 @@ from ..reader import read_psk
 empty_set = set()
 
 
+class PSK_FH_import(FileHandler):
+    bl_idname = 'PSK_FH_import'
+    bl_label = 'File handler for Unreal PSK/PSKX import'
+    bl_import_operator = 'import_scene.psk'
+    bl_file_extensions = '.psk;.pskx'
+
+    @classmethod
+    def poll_drop(cls, context: Context):
+        return context.area and context.area.type == 'VIEW_3D'
+
+
 class PSK_OT_import(Operator, ImportHelper):
     bl_idname = 'import_scene.psk'
     bl_label = 'Import'
@@ -132,10 +143,11 @@ class PSK_OT_import(Operator, ImportHelper):
         col.use_property_decorate = False
         col.prop(self, 'scale')
 
-        layout.prop(self, 'should_import_mesh')
+        mesh_header, mesh_panel = layout.panel('mesh_panel_id', default_closed=False)
+        mesh_header.prop(self, 'should_import_mesh')
 
-        if self.should_import_mesh:
+        if mesh_panel and self.should_import_mesh:
-            row = layout.row()
+            row = mesh_panel.row()
             col = row.column()
             col.use_property_split = True
             col.use_property_decorate = False
@@ -147,9 +159,11 @@ class PSK_OT_import(Operator, ImportHelper):
                 col.prop(self, 'vertex_color_space')
             col.prop(self, 'should_import_shape_keys', text='Shape Keys')
 
-        layout.prop(self, 'should_import_skeleton')
+        skeleton_header, skeleton_panel = layout.panel('skeleton_panel_id', default_closed=False)
-        if self.should_import_skeleton:
+        skeleton_header.prop(self, 'should_import_skeleton')
-            row = layout.row()
+
+        if skeleton_panel and self.should_import_skeleton:
+            row = skeleton_panel.row()
             col = row.column()
             col.use_property_split = True
             col.use_property_decorate = False
@@ -158,4 +172,5 @@ class PSK_OT_import(Operator, ImportHelper):
 
 classes = (
     PSK_OT_import,
+    PSK_FH_import,
 )

io_scene_psk_psa/psk/importer.py

@@ -8,7 +8,7 @@ from mathutils import Quaternion, Vector, Matrix
 
 from .data import Psk
 from .properties import poly_flags_to_triangle_type_and_bit_flags
-from ..helpers import rgb_to_srgb, is_bdk_addon_loaded
+from ..shared.helpers import rgb_to_srgb, is_bdk_addon_loaded
 
 
 class PskImportOptions:
@@ -171,7 +171,7 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
 
         # TEXTURE COORDINATES
         uv_layer_data_index = 0
-        uv_layer = mesh_data.uv_layers.new(name='VTXW0000')
+        uv_layer = mesh_data.uv_layers.new(name='UVMap')
         for face_index, face in enumerate(psk.faces):
             if face_index in invalid_face_indices:
                 continue
@@ -231,8 +231,6 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
             for vertex_normal in psk.vertex_normals:
                 normals.append(tuple(vertex_normal))
             mesh_data.normals_split_custom_set_from_vertices(normals)
-            # TODO: This has been removed in 4.1!
-            mesh_data.use_auto_smooth = True
         else:
             mesh_data.shade_smooth()
 

io_scene_psk_psa/psk/writer.py

@@ -2,7 +2,7 @@ from ctypes import Structure, sizeof
 from typing import Type
 
 from .data import Psk
-from ..data import Section, Vector3
+from ..shared.data import Section, Vector3
 
 MAX_WEDGE_COUNT = 65536
 MAX_POINT_COUNT = 4294967296

io_scene_psk_psa/shared/helpers.py

@@ -30,12 +30,12 @@ def get_nla_strips_in_frame_range(animation_data: AnimData, frame_min: float, fr
 
 
 def populate_bone_collection_list(armature_object: Object, bone_collection_list: bpy.props.CollectionProperty) -> None:
-    '''
+    """
     Updates the bone collections collection.
 
     Bone collection selections are preserved between updates unless none of the groups were previously selected;
     otherwise, all collections are selected by default.
-    '''
+    """
     has_selected_collections = any([g.is_selected for g in bone_collection_list])
     unassigned_collection_is_selected, selected_assigned_collection_names = True, []
 
@@ -84,7 +84,7 @@ def check_bone_names(bone_names: Iterable[str]):
 
 
 def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_collection_indices: List[int]) -> List[str]:
-    '''
+    """
     Returns a sorted list of bone indices that should be exported for the given bone filter mode and bone collections.
 
     Note that the ancestors of bones within the bone collections will also be present in the returned list.
@@ -93,7 +93,7 @@ def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_c
     :param bone_filter_mode: One of ['ALL', 'BONE_COLLECTIONS']
     :param bone_collection_indices: List of bone collection indices to be exported.
     :return: A sorted list of bone indices that should be exported.
-    '''
+    """
     if armature_object is None or armature_object.type != 'ARMATURE':
         raise ValueError('An armature object must be supplied')