Initial commit for handling the PSA config

# Conflicts:
#	io_scene_psk_psa/__init__.py
#	io_scene_psk_psa/helpers.py

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,34 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Versions**
+Blender: (example: 3.6.2)
+io_scene_psk_psa: (example: 5.0.0)
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Files**
+Please post attachments of the PSK and/or PSA files that you are using to encounter the bug, if any.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

README.md

@@ -1,24 +1,32 @@
-[![Blender](https://img.shields.io/badge/Blender->=3.4-blue?logo=blender&logoColor=white)](https://www.blender.org/download/ "Download Blender")
+[![Blender](https://img.shields.io/badge/Blender->=4.0-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/)
 
 [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/L4L3853VR)
 
 This Blender add-on 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.
 
-> **NOTE**: This addon requires Blender 3.4+. If this is not available to you, install version [4.3.0](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/4.3.0), as it has a minimum Blender version of 2.9, but is no longer receiving new features.
-
 # Features
 * Full PSK/PSA import and export capabilities.
 * Non-standard file section data is supported for import only (vertex normals, extra UV channels, vertex colors, shape keys).
 * Fine-grained PSA sequence importing for efficient workflow when working with large PSA files.
 * PSA sequence metadata (e.g., frame rate, sequence name) is preserved on import, allowing this data to be reused on export.
-* Specific [bone groups](https://docs.blender.org/manual/en/latest/animation/armatures/properties/bone_groups.html) can be excluded from PSK/PSA export (useful for excluding non-contributing bones such as IK controllers).
-* PSA sequences can be exported directly from actions or delineated using a scene's [timeline markers](https://docs.blender.org/manual/en/latest/animation/markers.html), allowing direct use of the [NLA](https://docs.blender.org/manual/en/latest/editors/nla/index.html) when creating sequences.
+* Specific bone collections can be excluded from PSK/PSA export (useful for excluding non-contributing bones such as IK controllers).
+* PSA sequences can be exported directly from actions or delineated using a scene's [timeline markers](https://docs.blender.org/manual/en/latest/animation/markers.html) or NLA track strips, allowing direct use of the [NLA](https://docs.blender.org/manual/en/latest/editors/nla/index.html) when creating sequences.
 * Manual re-ordering of material slots when exporting multiple mesh objects.
 
+## Compatibility
+
+| Blender Version                                              | Addon Version                                                                  | LTS Support       |
+|--------------------------------------------------------------|--------------------------------------------------------------------------------|-------------------|
+| 4.0+                                                         | [latest](https://github.com/DarklightGames/io_scene_psk_psa/releases/latest)   | TBD               |
+| [3.4 - 3.6](https://www.blender.org/download/lts/3-6/)       | [5.0.5](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/5.0.5) | ✅️ 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-on versions will no longer be supported by the maintainers of this repository, although we will accept pull requests for bug fixes. 
+
 # Installation
 1. Download the zip file for the latest version from the [releases](https://github.com/DarklightGames/io_export_psk_psa/releases) page.
-2. Open Blender 3.4.0 or later.
+2. Open Blender 4.0.0 or later.
 3. Navigate to the Blender Preferences (`Edit` > `Preferences`).
 4. Select the `Add-ons` tab.
 5. Click the `Install...` button.

io_scene_psk_psa/__init__.py

@@ -1,8 +1,10 @@
+from bpy.app.handlers import persistent
+
 bl_info = {
     "name": "PSK/PSA Importer/Exporter",
     "author": "Colin Basnett, Yurii Ti",
-    "version": (5, 0, 5),
-    "blender": (3, 4, 0),
+    "version": (6, 0, 0),
+    "blender": (4, 0, 0),
     "description": "PSK/PSA Import/Export (.psk/.psa)",
     "warning": "",
     "doc_url": "https://github.com/DarklightGames/io_scene_psk_psa",
@@ -28,6 +30,7 @@ if 'bpy' in locals():
     importlib.reload(psk_import_operators)
 
     importlib.reload(psa_data)
+    importlib.reload(psa_config)
     importlib.reload(psa_reader)
     importlib.reload(psa_writer)
     importlib.reload(psa_builder)
@@ -53,6 +56,7 @@ else:
     from .psk.import_ import operators as psk_import_operators
 
     from .psa import data as psa_data
+    from .psa import config as psa_config
     from .psa import reader as psa_reader
     from .psa import writer as psa_writer
     from .psa import builder as psa_builder
@@ -124,3 +128,16 @@ def unregister():
 
 if __name__ == '__main__':
     register()
+
+
+@persistent
+def load_handler(dummy):
+    # Convert old `psa_sequence_fps` property to new `psa_export.fps` property.
+    # This is only needed for backwards compatibility with files that may have used older versions of the addon.
+    for action in bpy.data.actions:
+        if 'psa_sequence_fps' in action:
+            action.psa_export.fps = action['psa_sequence_fps']
+            del action['psa_sequence_fps']
+
+
+bpy.app.handlers.load_post.append(load_handler)

io_scene_psk_psa/helpers.py

@@ -1,7 +1,5 @@
-import datetime
 import re
 import typing
-from collections import Counter
 from typing import List, Iterable
 
 import addon_utils
@@ -9,24 +7,6 @@ import bpy.types
 from bpy.types import NlaStrip, Object, AnimData
 
 
-class Timer:
-    def __enter__(self):
-        self.start = datetime.datetime.now()
-        self.interval = None
-        return self
-
-    def __exit__(self, *args):
-        self.end = datetime.datetime.now()
-        self.interval = self.end - self.start
-
-    @property
-    def duration(self):
-        if self.interval is not None:
-            return self.interval
-        else:
-            return datetime.datetime.now() - self.start
-
-
 def rgb_to_srgb(c: float):
     if c > 0.0031308:
         return 1.055 * (pow(c, (1.0 / 2.4))) - 0.055
@@ -34,7 +14,7 @@ def rgb_to_srgb(c: float):
         return 12.92 * c
 
 
-def get_nla_strips_in_timeframe(animation_data: AnimData, frame_min: float, frame_max: float) -> List[NlaStrip]:
+def get_nla_strips_in_frame_range(animation_data: AnimData, frame_min: float, frame_max: float) -> List[NlaStrip]:
     if animation_data is None:
         return []
     strips = []
@@ -49,43 +29,49 @@ def get_nla_strips_in_timeframe(animation_data: AnimData, frame_min: float, fram
     return strips
 
 
-def populate_bone_group_list(armature_object: Object, bone_group_list: bpy.props.CollectionProperty) -> None:
+def populate_bone_collection_list(armature_object: Object, bone_collection_list: bpy.props.CollectionProperty) -> None:
     """
-    Updates the bone group collection.
+    Updates the bone collections collection.
 
-    Bone group selections are preserved between updates unless none of the groups were previously selected;
-    otherwise, all groups are selected by default.
+    Bone collection selections are preserved between updates unless none of the groups were previously selected;
+    otherwise, all collections are selected by default.
     """
-    has_selected_groups = any([g.is_selected for g in bone_group_list])
-    unassigned_group_is_selected, selected_assigned_group_names = True, []
+    has_selected_collections = any([g.is_selected for g in bone_collection_list])
+    unassigned_collection_is_selected, selected_assigned_collection_names = True, []
 
-    if has_selected_groups:
+    if armature_object is None:
+        return
+
+    if has_selected_collections:
         # Preserve group selections before clearing the list.
         # We handle selections for the unassigned group separately to cover the edge case
         # where there might be an actual group with 'Unassigned' as its name.
-        unassigned_group_idx, unassigned_group_is_selected = next(iter([
-            (i, g.is_selected) for i, g in enumerate(bone_group_list) if g.index == -1]), (-1, False))
+        unassigned_collection_idx, unassigned_collection_is_selected = next(iter([
+            (i, g.is_selected) for i, g in enumerate(bone_collection_list) if g.index == -1]), (-1, False))
 
-        selected_assigned_group_names = [
-            g.name for i, g in enumerate(bone_group_list) if i != unassigned_group_idx and g.is_selected]
+        selected_assigned_collection_names = [
+            g.name for i, g in enumerate(bone_collection_list) if i != unassigned_collection_idx and g.is_selected]
 
-    bone_group_list.clear()
+    bone_collection_list.clear()
 
-    if armature_object and armature_object.pose:
-        bone_group_counts = Counter(map(lambda x: x.bone_group, armature_object.pose.bones))
+    armature = armature_object.data
 
-        item = bone_group_list.add()
-        item.name = 'Unassigned'
-        item.index = -1
-        item.count = 0 if None not in bone_group_counts else bone_group_counts[None]
-        item.is_selected = unassigned_group_is_selected
+    if armature is None:
+        return
 
-        for bone_group_index, bone_group in enumerate(armature_object.pose.bone_groups):
-            item = bone_group_list.add()
-            item.name = bone_group.name
-            item.index = bone_group_index
-            item.count = 0 if bone_group not in bone_group_counts else bone_group_counts[bone_group]
-            item.is_selected = bone_group.name in selected_assigned_group_names if has_selected_groups else True
+    item = bone_collection_list.add()
+    item.name = 'Unassigned'
+    item.index = -1
+    # Count the number of bones without an assigned bone collection
+    item.count = sum(map(lambda bone: 1 if len(bone.collections) == 0 else 0, armature.bones))
+    item.is_selected = unassigned_collection_is_selected
+
+    for bone_collection_index, bone_collection in enumerate(armature.collections):
+        item = bone_collection_list.add()
+        item.name = bone_collection.name
+        item.index = bone_collection_index
+        item.count = len(bone_collection.bones)
+        item.is_selected = bone_collection.name in selected_assigned_collection_names if has_selected_collections else True
 
 
 def check_bone_names(bone_names: Iterable[str]):
@@ -97,15 +83,15 @@ def check_bone_names(bone_names: Iterable[str]):
                            f'You can bypass this by disabling "Enforce Bone Name Restrictions" in the export settings.')
 
 
-def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_group_indices: List[int]) -> List[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 groups.
+    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 groups will also be present in the returned list.
+    Note that the ancestors of bones within the bone collections will also be present in the returned list.
 
     :param armature_object: Blender object with type 'ARMATURE'
-    :param bone_filter_mode: One of ['ALL', 'BONE_GROUPS']
-    :param bone_group_indices: List of bone group indices to be exported.
+    :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':
@@ -113,16 +99,21 @@ def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_g
 
     armature_data = typing.cast(bpy.types.Armature, armature_object.data)
     bones = armature_data.bones
-    pose_bones = armature_object.pose.bones
     bone_names = [x.name for x in bones]
 
     # Get a list of the bone indices that we are explicitly including.
     bone_index_stack = []
-    is_exporting_none_bone_groups = -1 in bone_group_indices
-    for bone_index, pose_bone in enumerate(pose_bones):
+    is_exporting_unassigned_bone_collections = -1 in bone_collection_indices
+    bone_collections = list(armature_data.collections)
+
+    for bone_index, bone in enumerate(bones):
+        # Check if this bone is in any of the collections in the bone collection indices list.
+        this_bone_collection_indices = set(bone_collections.index(x) for x in bone.collections)
+        is_in_exported_bone_collections = len(set(bone_collection_indices).intersection(this_bone_collection_indices)) > 0
+
         if bone_filter_mode == 'ALL' or \
-                (pose_bone.bone_group is None and is_exporting_none_bone_groups) or \
-                (pose_bone.bone_group is not None and pose_bone.bone_group_index in bone_group_indices):
+                (len(bone.collections) == 0 and is_exporting_unassigned_bone_collections) or \
+                is_in_exported_bone_collections:
             bone_index_stack.append((bone_index, None))
 
     # For each bone that is explicitly being added, recursively walk up the hierarchy and ensure that all of
@@ -143,7 +134,7 @@ def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_g
 
     # Split out the bone indices and the instigator bone names into separate lists.
     # We use the bone names for the return values because the bone name is a more universal way of referencing them.
-    # For example, users of this function may modify bone lists, which would invalidate the indices and require a
+    # For example, users of this function may modify bone lists, which would invalidate the indices and require an
     # index mapping scheme to resolve it. Using strings is more comfy and results in less code downstream.
     instigator_bone_names = [bones[x[1]].name if x[1] is not None else None for x in bone_indices]
     bone_names = [bones[x[0]].name for x in bone_indices]

io_scene_psk_psa/psa/builder.py

@@ -26,7 +26,7 @@ class PsaBuildOptions:
         self.animation_data: Optional[AnimData] = None
         self.sequences: List[PsaBuildSequence] = []
         self.bone_filter_mode: str = 'ALL'
-        self.bone_group_indices: List[int] = []
+        self.bone_collection_indices: List[int] = []
         self.should_enforce_bone_name_restrictions: bool = False
         self.sequence_name_prefix: str = ''
         self.sequence_name_suffix: str = ''
@@ -73,7 +73,7 @@ def build_psa(context: bpy.types.Context, options: PsaBuildOptions) -> Psa:
     pose_bones = [x[1] for x in pose_bones]
 
     # Get a list of all the bone indices and instigator bones for the bone filter settings.
-    export_bone_names = get_export_bone_names(armature_object, options.bone_filter_mode, options.bone_group_indices)
+    export_bone_names = get_export_bone_names(armature_object, options.bone_filter_mode, options.bone_collection_indices)
     bone_indices = [bone_names.index(x) for x in export_bone_names]
 
     # Make the bone lists contain only the bones that are going to be exported.
@@ -91,7 +91,11 @@ def build_psa(context: bpy.types.Context, options: PsaBuildOptions) -> Psa:
     # Build list of PSA bones.
     for bone in bones:
         psa_bone = Psa.Bone()
-        psa_bone.name = bytes(bone.name, encoding='windows-1252')
+
+        try:
+            psa_bone.name = bytes(bone.name, encoding='windows-1252')
+        except UnicodeEncodeError:
+            raise RuntimeError(f'Bone name "{bone.name}" contains characters that cannot be encoded in the Windows-1252 codepage')
 
         try:
             parent_index = bones.index(bone.parent)
@@ -165,7 +169,10 @@ def build_psa(context: bpy.types.Context, options: PsaBuildOptions) -> Psa:
             frame_step = -frame_step
 
         psa_sequence = Psa.Sequence()
-        psa_sequence.name = bytes(export_sequence.name, encoding='windows-1252')
+        try:
+            psa_sequence.name = bytes(export_sequence.name, encoding='windows-1252')
+        except UnicodeEncodeError:
+            raise RuntimeError(f'Sequence name "{export_sequence.name}" contains characters that cannot be encoded in the Windows-1252 codepage')
         psa_sequence.frame_count = frame_count
         psa_sequence.frame_start_index = frame_start_index
         psa_sequence.fps = frame_count / sequence_duration

io_scene_psk_psa/psa/config.py

@@ -0,0 +1,48 @@
+import re
+from configparser import ConfigParser
+from typing import Dict
+
+from .reader import PsaReader
+
+REMOVE_TRACK_LOCATION = (1 << 0)
+REMOVE_TRACK_ROTATION = (1 << 1)
+
+
+class PsaConfig:
+    def __init__(self):
+        self.sequence_bone_flags: Dict[str, Dict[int, int]] = dict()
+
+
+def read_psa_config(psa_reader: PsaReader, file_path: str) -> PsaConfig:
+    psa_config = PsaConfig()
+
+    config = ConfigParser()
+    config.read(file_path)
+
+    psa_sequence_names = list(psa_reader.sequences.keys())
+    lowercase_sequence_names = [sequence_name.lower() for sequence_name in psa_sequence_names]
+
+    if config.has_section('RemoveTracks'):
+        for key, value in config.items('RemoveTracks'):
+            match = re.match(f'^(.+)\.(\d+)$', key)
+            sequence_name = match.group(1)
+            bone_index = int(match.group(2))
+
+            # Map the sequence name onto the actual sequence name in the PSA file.
+            try:
+                sequence_name = psa_sequence_names[lowercase_sequence_names.index(sequence_name.lower())]
+            except ValueError:
+                pass
+
+            if sequence_name not in psa_config.sequence_bone_flags:
+                psa_config.sequence_bone_flags[sequence_name] = dict()
+
+            match value:
+                case 'all':
+                    psa_config.sequence_bone_flags[sequence_name][bone_index] = (REMOVE_TRACK_LOCATION | REMOVE_TRACK_ROTATION)
+                case 'trans':
+                    psa_config.sequence_bone_flags[sequence_name][bone_index] = REMOVE_TRACK_LOCATION
+                case 'rot':
+                    psa_config.sequence_bone_flags[sequence_name][bone_index] = REMOVE_TRACK_ROTATION
+
+    return psa_config

io_scene_psk_psa/psa/export/operators.py

@@ -8,10 +8,10 @@ from bpy.types import Context, Armature, Action, Object, AnimData, TimelineMarke
 from bpy_extras.io_utils import ExportHelper
 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 ..export.properties import PSA_PG_export, PSA_PG_export_action_list_item, filter_sequences
 from ..writer import write_psa
-from ...helpers import populate_bone_group_list, get_nla_strips_in_timeframe
+from ...helpers import populate_bone_collection_list, get_nla_strips_in_frame_range
 
 
 def is_action_for_armature(armature: Armature, action: Action):
@@ -80,12 +80,14 @@ def update_actions_and_timeline_markers(context: Context, armature: Armature):
             continue
         if marker_name.startswith('#'):
             continue
-        item = pg.marker_list.add()
-        item.name = marker_name
-        item.is_selected = False
         frame_start, frame_end = sequence_frame_ranges[marker_name]
-        item.frame_start = frame_start
-        item.frame_end = frame_end
+        sequences = get_sequences_from_name_and_frame_range(marker_name, frame_start, frame_end)
+        for (sequence_name, frame_start, frame_end) in sequences:
+            item = pg.marker_list.add()
+            item.name = sequence_name
+            item.is_selected = False
+            item.frame_start = frame_start
+            item.frame_end = frame_end
 
 
 def get_sequence_fps(context: Context, fps_source: str, fps_custom: float, actions: Iterable[Action]) -> float:
@@ -95,16 +97,7 @@ def get_sequence_fps(context: Context, fps_source: str, fps_custom: float, actio
         return fps_custom
     elif fps_source == 'ACTION_METADATA':
         # Get the minimum value of action metadata FPS values.
-        fps_list = []
-        for action in filter(lambda x: 'psa_sequence_fps' in x, actions):
-            fps = action['psa_sequence_fps']
-            if type(fps) == int or type(fps) == float:
-                fps_list.append(fps)
-        if len(fps_list) > 0:
-            return min(fps_list)
-        else:
-            # No valid action metadata to use, fallback to scene FPS
-            return context.scene.render.fps
+        return min([action.psa_export.fps for action in actions])
     else:
         raise RuntimeError(f'Invalid FPS source "{fps_source}"')
 
@@ -126,9 +119,9 @@ def get_animation_data_object(context: Context) -> Object:
 
 
 def is_bone_filter_mode_item_available(context, identifier):
-    if identifier == 'BONE_GROUPS':
-        obj = context.active_object
-        if not obj.pose or not obj.pose.bone_groups:
+    if identifier == 'BONE_COLLECTIONS':
+        armature = context.active_object.data
+        if len(armature.collections) == 0:
             return False
     return True
 
@@ -150,7 +143,7 @@ def get_timeline_marker_sequence_frame_ranges(animation_data: AnimData, context:
         if next_marker_index < len(sorted_timeline_markers):
             # There is a next marker. Use that next marker's frame position as the last frame of this sequence.
             frame_end = sorted_timeline_markers[next_marker_index].frame
-            nla_strips = get_nla_strips_in_timeframe(animation_data, marker.frame, frame_end)
+            nla_strips = get_nla_strips_in_frame_range(animation_data, marker.frame, frame_end)
             if len(nla_strips) > 0:
                 frame_end = min(frame_end, max(map(lambda nla_strip: nla_strip.frame_end, nla_strips)))
                 frame_start = max(frame_start, min(map(lambda nla_strip: nla_strip.frame_start, nla_strips)))
@@ -174,11 +167,9 @@ def get_timeline_marker_sequence_frame_ranges(animation_data: AnimData, context:
     return sequence_frame_ranges
 
 
-def get_sequences_from_action(action: Action) -> List[Tuple[str, int, int]]:
-    frame_start = int(action.frame_range[0])
-    frame_end = int(action.frame_range[1])
+def get_sequences_from_name_and_frame_range(name: str, frame_start: int, frame_end: int) -> List[Tuple[str, int, int]]:
     reversed_pattern = r'(.+)/(.+)'
-    reversed_match = re.match(reversed_pattern, action.name)
+    reversed_match = re.match(reversed_pattern, name)
     if reversed_match:
         forward_name = reversed_match.group(1)
         backwards_name = reversed_match.group(2)
@@ -187,7 +178,13 @@ def get_sequences_from_action(action: Action) -> List[Tuple[str, int, int]]:
             (backwards_name, frame_end, frame_start)
         ]
     else:
-        return [(action.name, frame_start, frame_end)]
+        return [(name, frame_start, frame_end)]
+
+
+def get_sequences_from_action(action: Action) -> List[Tuple[str, int, int]]:
+    frame_start = int(action.frame_range[0])
+    frame_end = int(action.frame_range[1])
+    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]]:
@@ -196,17 +193,7 @@ def get_sequences_from_action_pose_marker(action: Action, pose_markers: List[Tim
         frame_end = pose_markers[pose_marker_index + 1].frame
     else:
         frame_end = int(action.frame_range[1])
-    reversed_pattern = r'(.+)/(.+)'
-    reversed_match = re.match(reversed_pattern, pose_marker.name)
-    if reversed_match:
-        forward_name = reversed_match.group(1)
-        backwards_name = reversed_match.group(2)
-        return [
-            (forward_name, frame_start, frame_end),
-            (backwards_name, frame_end, frame_start)
-        ]
-    else:
-        return [(pose_marker.name, frame_start, frame_end)]
+    return get_sequences_from_name_and_frame_range(pose_marker.name, frame_start, frame_end)
 
 
 def get_visible_sequences(pg: PSA_PG_export, sequences) -> List[PSA_PG_export_action_list_item]:
@@ -254,12 +241,18 @@ class PSA_OT_export(Operator, ExportHelper):
         # SOURCE
         layout.prop(pg, 'sequence_source', text='Source')
 
-        if pg.sequence_source == 'TIMELINE_MARKERS':
+        if pg.sequence_source in {'TIMELINE_MARKERS', 'NLA_TRACK_STRIPS'}:
             # ANIMDATA SOURCE
             layout.prop(pg, 'should_override_animation_data')
             if pg.should_override_animation_data:
                 layout.prop(pg, 'animation_data_override', text='')
 
+        if pg.sequence_source == 'NLA_TRACK_STRIPS':
+            flow = layout.grid_flow()
+            flow.use_property_split = True
+            flow.use_property_decorate = False
+            flow.prop(pg, 'nla_track')
+
         # SELECT ALL/NONE
         row = layout.row(align=True)
         row.label(text='Select')
@@ -269,25 +262,19 @@ class PSA_OT_export(Operator, ExportHelper):
         # ACTIONS
         if pg.sequence_source == 'ACTIONS':
             rows = max(3, min(len(pg.action_list), 10))
-
             layout.template_list('PSA_UL_export_sequences', '', pg, 'action_list', pg, 'action_list_index', rows=rows)
-
-            col = layout.column()
-            col.use_property_split = True
-            col.use_property_decorate = False
-            col.prop(pg, 'sequence_name_prefix')
-            col.prop(pg, 'sequence_name_suffix')
-
         elif pg.sequence_source == 'TIMELINE_MARKERS':
             rows = max(3, min(len(pg.marker_list), 10))
-            layout.template_list('PSA_UL_export_sequences', '', pg, 'marker_list', pg, 'marker_list_index',
-                                 rows=rows)
+            layout.template_list('PSA_UL_export_sequences', '', pg, 'marker_list', pg, 'marker_list_index', rows=rows)
+        elif pg.sequence_source == 'NLA_TRACK_STRIPS':
+            rows = max(3, min(len(pg.nla_strip_list), 10))
+            layout.template_list('PSA_UL_export_sequences', '', pg, 'nla_strip_list', pg, 'nla_strip_list_index', rows=rows)
 
-            col = layout.column()
-            col.use_property_split = True
-            col.use_property_decorate = False
-            col.prop(pg, 'sequence_name_prefix')
-            col.prop(pg, 'sequence_name_suffix')
+        col = layout.column()
+        col.use_property_split = True
+        col.use_property_decorate = False
+        col.prop(pg, 'sequence_name_prefix')
+        col.prop(pg, 'sequence_name_suffix')
 
         # Determine if there is going to be a naming conflict and display an error, if so.
         selected_items = [x for x in pg.action_list if x.is_selected]
@@ -304,13 +291,13 @@ class PSA_OT_export(Operator, ExportHelper):
         row = layout.row(align=True)
         row.prop(pg, 'bone_filter_mode', text='Bones')
 
-        if pg.bone_filter_mode == 'BONE_GROUPS':
+        if pg.bone_filter_mode == 'BONE_COLLECTIONS':
             row = layout.row(align=True)
             row.label(text='Select')
-            row.operator(PSA_OT_export_bone_groups_select_all.bl_idname, text='All', icon='CHECKBOX_HLT')
-            row.operator(PSA_OT_export_bone_groups_deselect_all.bl_idname, text='None', icon='CHECKBOX_DEHLT')
-            rows = max(3, min(len(pg.bone_group_list), 10))
-            layout.template_list('PSX_UL_bone_group_list', '', pg, 'bone_group_list', pg, 'bone_group_list_index',
+            row.operator(PSA_OT_export_bone_collections_select_all.bl_idname, text='All', icon='CHECKBOX_HLT')
+            row.operator(PSA_OT_export_bone_collections_deselect_all.bl_idname, text='None', icon='CHECKBOX_DEHLT')
+            rows = max(3, min(len(pg.bone_collection_list), 10))
+            layout.template_list('PSX_UL_bone_collection_list', '', pg, 'bone_collection_list', pg, 'bone_collection_list_index',
                                  rows=rows)
 
         layout.prop(pg, 'should_enforce_bone_name_restrictions')
@@ -345,8 +332,7 @@ class PSA_OT_export(Operator, ExportHelper):
 
         update_actions_and_timeline_markers(context, self.armature_object.data)
 
-        # Populate bone groups list.
-        populate_bone_group_list(self.armature_object, pg.bone_group_list)
+        populate_bone_collection_list(self.armature_object, pg.bone_collection_list)
 
         context.window_manager.fileselect_add(self)
 
@@ -360,6 +346,8 @@ class PSA_OT_export(Operator, ExportHelper):
             raise RuntimeError('No actions were selected for export')
         elif pg.sequence_source == 'TIMELINE_MARKERS' and len(pg.marker_list) == 0:
             raise RuntimeError('No timeline markers were selected for export')
+        elif pg.sequence_source == 'NLA_TRACK_STRIPS' and len(pg.nla_strip_list) == 0:
+            raise RuntimeError('No NLA track strips were selected for export')
 
         # Populate the export sequence list.
         animation_data_object = get_animation_data_object(context)
@@ -371,29 +359,38 @@ class PSA_OT_export(Operator, ExportHelper):
         export_sequences: List[PsaBuildSequence] = []
 
         if pg.sequence_source == 'ACTIONS':
-            for action in filter(lambda x: x.is_selected, pg.action_list):
-                if len(action.action.fcurves) == 0:
+            for action_item in filter(lambda x: x.is_selected, pg.action_list):
+                if len(action_item.action.fcurves) == 0:
                     continue
                 export_sequence = PsaBuildSequence()
-                export_sequence.nla_state.action = action.action
-                export_sequence.name = action.name
-                export_sequence.nla_state.frame_start = action.frame_start
-                export_sequence.nla_state.frame_end = action.frame_end
-                export_sequence.fps = get_sequence_fps(context, pg.fps_source, pg.fps_custom, [action.action])
-                export_sequence.compression_ratio = action.action.psa_export.compression_ratio
-                export_sequence.key_quota = action.action.psa_export.key_quota
+                export_sequence.nla_state.action = action_item.action
+                export_sequence.name = action_item.name
+                export_sequence.nla_state.frame_start = action_item.frame_start
+                export_sequence.nla_state.frame_end = action_item.frame_end
+                export_sequence.fps = get_sequence_fps(context, pg.fps_source, pg.fps_custom, [action_item.action])
+                export_sequence.compression_ratio = action_item.action.psa_export.compression_ratio
+                export_sequence.key_quota = action_item.action.psa_export.key_quota
                 export_sequences.append(export_sequence)
         elif pg.sequence_source == 'TIMELINE_MARKERS':
-            for marker in pg.marker_list:
+            for marker_item in filter(lambda x: x.is_selected, pg.marker_list):
                 export_sequence = PsaBuildSequence()
-                export_sequence.name = marker.name
+                export_sequence.name = marker_item.name
                 export_sequence.nla_state.action = None
-                export_sequence.nla_state.frame_start = marker.frame_start
-                export_sequence.nla_state.frame_end = marker.frame_end
+                export_sequence.nla_state.frame_start = marker_item.frame_start
+                export_sequence.nla_state.frame_end = marker_item.frame_end
                 nla_strips_actions = set(
-                    map(lambda x: x.action, get_nla_strips_in_timeframe(animation_data, marker.frame_start, marker.frame_end)))
+                    map(lambda x: x.action, get_nla_strips_in_frame_range(animation_data, marker_item.frame_start, marker_item.frame_end)))
                 export_sequence.fps = get_sequence_fps(context, pg.fps_source, pg.fps_custom, nla_strips_actions)
                 export_sequences.append(export_sequence)
+        elif pg.sequence_source == 'NLA_TRACK_STRIPS':
+            for nla_strip_item in filter(lambda x: x.is_selected, pg.nla_strip_list):
+                export_sequence = PsaBuildSequence()
+                export_sequence.name = nla_strip_item.name
+                export_sequence.nla_state.action = None
+                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_sequences.append(export_sequence)
         else:
             raise ValueError(f'Unhandled sequence source: {pg.sequence_source}')
 
@@ -401,7 +398,7 @@ class PSA_OT_export(Operator, ExportHelper):
         options.animation_data = animation_data
         options.sequences = export_sequences
         options.bone_filter_mode = pg.bone_filter_mode
-        options.bone_group_indices = [x.index for x in pg.bone_group_list if x.is_selected]
+        options.bone_collection_indices = [x.index for x in pg.bone_collection_list if x.is_selected]
         options.should_ignore_bone_name_restrictions = pg.should_enforce_bone_name_restrictions
         options.sequence_name_prefix = pg.sequence_name_prefix
         options.sequence_name_suffix = pg.sequence_name_suffix
@@ -432,6 +429,8 @@ class PSA_OT_export_actions_select_all(Operator):
             return pg.action_list
         elif pg.sequence_source == 'TIMELINE_MARKERS':
             return pg.marker_list
+        elif pg.sequence_source == 'NLA_TRACK_STRIPS':
+            return pg.nla_strip_list
         return None
 
     @classmethod
@@ -463,6 +462,8 @@ class PSA_OT_export_actions_deselect_all(Operator):
             return pg.action_list
         elif pg.sequence_source == 'TIMELINE_MARKERS':
             return pg.marker_list
+        elif pg.sequence_source == 'NLA_TRACK_STRIPS':
+            return pg.nla_strip_list
         return None
 
     @classmethod
@@ -479,42 +480,42 @@ class PSA_OT_export_actions_deselect_all(Operator):
         return {'FINISHED'}
 
 
-class PSA_OT_export_bone_groups_select_all(Operator):
-    bl_idname = 'psa_export.bone_groups_select_all'
+class PSA_OT_export_bone_collections_select_all(Operator):
+    bl_idname = 'psa_export.bone_collections_select_all'
     bl_label = 'Select All'
-    bl_description = 'Select all bone groups'
+    bl_description = 'Select all bone collections'
     bl_options = {'INTERNAL'}
 
     @classmethod
     def poll(cls, context):
         pg = getattr(context.scene, 'psa_export')
-        item_list = pg.bone_group_list
+        item_list = pg.bone_collection_list
         has_unselected_items = any(map(lambda action: not action.is_selected, item_list))
         return len(item_list) > 0 and has_unselected_items
 
     def execute(self, context):
         pg = getattr(context.scene, 'psa_export')
-        for item in pg.bone_group_list:
+        for item in pg.bone_collection_list:
             item.is_selected = True
         return {'FINISHED'}
 
 
-class PSA_OT_export_bone_groups_deselect_all(Operator):
-    bl_idname = 'psa_export.bone_groups_deselect_all'
+class PSA_OT_export_bone_collections_deselect_all(Operator):
+    bl_idname = 'psa_export.bone_collections_deselect_all'
     bl_label = 'Deselect All'
-    bl_description = 'Deselect all bone groups'
+    bl_description = 'Deselect all bone collections'
     bl_options = {'INTERNAL'}
 
     @classmethod
     def poll(cls, context):
         pg = getattr(context.scene, 'psa_export')
-        item_list = pg.bone_group_list
+        item_list = pg.bone_collection_list
         has_selected_actions = any(map(lambda action: action.is_selected, item_list))
         return len(item_list) > 0 and has_selected_actions
 
     def execute(self, context):
         pg = getattr(context.scene, 'psa_export')
-        for action in pg.bone_group_list:
+        for action in pg.bone_collection_list:
             action.is_selected = False
         return {'FINISHED'}
 
@@ -523,6 +524,6 @@ classes = (
     PSA_OT_export,
     PSA_OT_export_actions_select_all,
     PSA_OT_export_actions_deselect_all,
-    PSA_OT_export_bone_groups_select_all,
-    PSA_OT_export_bone_groups_deselect_all,
+    PSA_OT_export_bone_collections_select_all,
+    PSA_OT_export_bone_collections_deselect_all,
 )

io_scene_psk_psa/psa/export/properties.py

@@ -1,12 +1,13 @@
+import re
 import sys
 from fnmatch import fnmatch
-from typing import List
+from typing import List, Optional
 
 from bpy.props import BoolProperty, PointerProperty, EnumProperty, FloatProperty, CollectionProperty, IntProperty, \
     StringProperty
-from bpy.types import PropertyGroup, Object, Action
+from bpy.types import PropertyGroup, Object, Action, AnimData, Context
 
-from ...types import PSX_PG_bone_group_list_item
+from ...types import PSX_PG_bone_collection_list_item
 
 
 def psa_export_property_group_animation_data_override_poll(_context, obj):
@@ -19,13 +20,13 @@ empty_set = set()
 class PSA_PG_export_action_list_item(PropertyGroup):
     action: PointerProperty(type=Action)
     name: StringProperty()
-    is_selected: BoolProperty(default=False)
+    is_selected: BoolProperty(default=True)
     frame_start: IntProperty(options={'HIDDEN'})
     frame_end: IntProperty(options={'HIDDEN'})
     is_pose_marker: BoolProperty(options={'HIDDEN'})
 
 
-class PSA_PG_export_timeline_markers(PropertyGroup):
+class PSA_PG_export_timeline_markers(PropertyGroup):  # TODO: rename this to singular
     marker_index: IntProperty()
     name: StringProperty()
     is_selected: BoolProperty(default=True)
@@ -33,6 +34,51 @@ class PSA_PG_export_timeline_markers(PropertyGroup):
     frame_end: IntProperty(options={'HIDDEN'})
 
 
+class PSA_PG_export_nla_strip_list_item(PropertyGroup):
+    name: StringProperty()
+    action: PointerProperty(type=Action)
+    frame_start: FloatProperty()
+    frame_end: FloatProperty()
+    is_selected: BoolProperty(default=True)
+
+
+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]
+        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
+            strip.name = nla_strip.name
+            strip.frame_start = nla_strip.frame_start
+            strip.frame_end = nla_strip.frame_end
+
+
+def get_animation_data(pg: 'PSA_PG_export', context: Context) -> Optional[AnimData]:
+    animation_data_object = context.object
+    if pg.should_override_animation_data:
+        animation_data_object = pg.animation_data_override
+    return animation_data_object.animation_data if animation_data_object else None
+
+
+def nla_track_search_cb(self, context: Context, edit_text: str):
+    pg = getattr(context.scene, 'psa_export')
+    animation_data = get_animation_data(pg, context)
+    if animation_data is None:
+        return
+    for index, nla_track in enumerate(animation_data.nla_tracks):
+        yield f'{index} - {nla_track.name}'
+
+
+def animation_data_override_update_cb(self: 'PSA_PG_export', context: Context):
+    # Reset NLA track selection
+    self.nla_track = ''
+
+
 class PSA_PG_export(PropertyGroup):
     root_motion: BoolProperty(
         name='Root Motion',
@@ -46,10 +92,12 @@ class PSA_PG_export(PropertyGroup):
         name='Override Animation Data',
         options=empty_set,
         default=False,
-        description='Use the animation data from a different object instead of the selected object'
+        description='Use the animation data from a different object instead of the selected object',
+        update=animation_data_override_update_cb,
     )
     animation_data_override: PointerProperty(
         type=Object,
+        update=animation_data_override_update_cb,
         poll=psa_export_property_group_animation_data_override_poll
     )
     sequence_source: EnumProperty(
@@ -58,19 +106,25 @@ class PSA_PG_export(PropertyGroup):
         description='',
         items=(
             ('ACTIONS', 'Actions', 'Sequences will be exported using actions', 'ACTION', 0),
-            ('TIMELINE_MARKERS', 'Timeline Markers', 'Sequences will be exported using timeline markers', 'MARKER_HLT',
-             1),
+            ('TIMELINE_MARKERS', 'Timeline Markers', 'Sequences are delineated by scene timeline markers', 'MARKER_HLT', 1),
+            ('NLA_TRACK_STRIPS', 'NLA Track Strips', 'Sequences are delineated by the start & end times of strips on the selected NLA track', 'NLA', 2)
         )
     )
+    nla_track: StringProperty(
+        name='NLA Track',
+        options=empty_set,
+        description='',
+        search=nla_track_search_cb,
+        update=nla_track_update_cb
+    )
+    nla_track_index: IntProperty(name='NLA Track Index', default=-1)
     fps_source: EnumProperty(
         name='FPS Source',
         options=empty_set,
         description='',
         items=(
             ('SCENE', 'Scene', '', 'SCENE_DATA', 0),
-            ('ACTION_METADATA', 'Action Metadata',
-             'The frame rate will be determined by action\'s "psa_sequence_fps" custom property, if it exists. If the Sequence Source is Timeline Markers, the lowest value of all contributing actions will be used. If no metadata is available, the scene\'s frame rate will be used.',
-             'PROPERTIES', 1),
+            ('ACTION_METADATA', 'Action Metadata', 'The frame rate will be determined by action\'s FPS property found in the PSA Export panel.\n\nIf the Sequence Source is Timeline Markers, the lowest value of all contributing actions will be used', 'PROPERTIES', 1),
             ('CUSTOM', 'Custom', '', 2)
         )
     )
@@ -80,18 +134,20 @@ class PSA_PG_export(PropertyGroup):
     action_list_index: IntProperty(default=0)
     marker_list: CollectionProperty(type=PSA_PG_export_timeline_markers)
     marker_list_index: IntProperty(default=0)
+    nla_strip_list: CollectionProperty(type=PSA_PG_export_nla_strip_list_item)
+    nla_strip_list_index: IntProperty(default=0)
     bone_filter_mode: EnumProperty(
         name='Bone Filter',
         options=empty_set,
         description='',
         items=(
             ('ALL', 'All', 'All bones will be exported.'),
-            ('BONE_GROUPS', 'Bone Groups', 'Only bones belonging to the selected bone groups and their ancestors will '
-                                           'be exported.'),
+            ('BONE_COLLECTIONS', 'Bone Collections', 'Only bones belonging to the selected bone collections and their '
+             'ancestors will be exported.'),
         )
     )
-    bone_group_list: CollectionProperty(type=PSX_PG_bone_group_list_item)
-    bone_group_list_index: IntProperty(default=0, name='', description='')
+    bone_collection_list: CollectionProperty(type=PSX_PG_bone_collection_list_item)
+    bone_collection_list_index: IntProperty(default=0, name='', description='')
     should_enforce_bone_name_restrictions: BoolProperty(
         default=False,
         name='Enforce Bone Name Restrictions',
@@ -145,7 +201,7 @@ def filter_sequences(pg: PSA_PG_export, sequences) -> List[int]:
 
     if not pg.sequence_filter_asset:
         for i, sequence in enumerate(sequences):
-            if hasattr(sequence, 'action') and sequence.action.asset_data is not None:
+            if hasattr(sequence, 'action') and sequence.action is not None and sequence.action.asset_data is not None:
                 flt_flags[i] &= ~bitflag_filter_item
 
     if not pg.sequence_filter_pose_marker:
@@ -164,5 +220,6 @@ def filter_sequences(pg: PSA_PG_export, sequences) -> List[int]:
 classes = (
     PSA_PG_export_action_list_item,
     PSA_PG_export_timeline_markers,
+    PSA_PG_export_nla_strip_list_item,
     PSA_PG_export,
 )

io_scene_psk_psa/psa/export/ui.py

@@ -16,7 +16,7 @@ class PSA_UL_export_sequences(UIList):
         item = cast(PSA_PG_export_action_list_item, item)
         is_pose_marker = hasattr(item, 'is_pose_marker') and item.is_pose_marker
         layout.prop(item, 'is_selected', icon_only=True, text=item.name)
-        if hasattr(item, 'action') and item.action.asset_data is not None:
+        if hasattr(item, 'action') and item.action is not None and item.action.asset_data is not None:
             layout.label(text='', icon='ASSET_MANAGER')
 
         row = layout.row(align=True)

io_scene_psk_psa/psa/import_/operators.py

@@ -1,10 +1,12 @@
 import os
+from pathlib import Path
 
 from bpy.props import StringProperty
 from bpy.types import Operator, Event, Context
 from bpy_extras.io_utils import ImportHelper
 
 from .properties import get_visible_sequences
+from ..config import read_psa_config
 from ..importer import import_psa, PsaImportOptions
 from ..reader import PsaReader
 
@@ -166,6 +168,13 @@ class PSA_OT_import(Operator, ImportHelper):
         options.should_write_keyframes = pg.should_write_keyframes
         options.should_convert_to_samples = pg.should_convert_to_samples
         options.bone_mapping_mode = pg.bone_mapping_mode
+        options.fps_source = pg.fps_source
+        options.fps_custom = pg.fps_custom
+
+        # Read the PSA config file if it exists.
+        config_path = Path(self.filepath).with_suffix('.config')
+        if config_path.exists():
+            options.psa_config = read_psa_config(psa_reader, str(config_path))
 
         if len(sequence_names) == 0:
             self.report({'ERROR_INVALID_CONTEXT'}, 'No sequences selected')
@@ -239,6 +248,10 @@ class PSA_OT_import(Operator, ImportHelper):
             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 = layout.column(heading='Options')
         col.use_property_split = True

io_scene_psk_psa/psa/import_/properties.py

@@ -2,7 +2,8 @@ import re
 from fnmatch import fnmatch
 from typing import List
 
-from bpy.props import StringProperty, BoolProperty, CollectionProperty, IntProperty, PointerProperty, EnumProperty
+from bpy.props import StringProperty, BoolProperty, CollectionProperty, IntProperty, PointerProperty, EnumProperty, \
+    FloatProperty
 from bpy.types import PropertyGroup, Text
 
 empty_set = set()
@@ -10,7 +11,7 @@ empty_set = set()
 
 class PSA_PG_import_action_list_item(PropertyGroup):
     action_name: StringProperty(options=empty_set)
-    is_selected: BoolProperty(default=False, options=empty_set)
+    is_selected: BoolProperty(default=True, options=empty_set)
 
 
 class PSA_PG_bone(PropertyGroup):
@@ -66,6 +67,21 @@ class PSA_PG_import(PropertyGroup):
              '\'root\' can be mapped to the armature bone \'Root\')', 'CASE_INSENSITIVE', 1),
         )
     )
+    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),
+        ('CUSTOM', 'Custom', 'The sequence frame rate dilates to match 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',
+        options=empty_set,
+        min=1.0,
+        soft_min=1.0,
+        soft_max=60.0,
+        step=100,
+    )
 
 
 def filter_sequences(pg: PSA_PG_import, sequences) -> List[int]:

io_scene_psk_psa/psa/importer.py

@@ -6,6 +6,7 @@ import numpy
 from bpy.types import FCurve, Object, Context
 from mathutils import Vector, Quaternion
 
+from .config import PsaConfig, REMOVE_TRACK_LOCATION, REMOVE_TRACK_ROTATION
 from .data import Psa
 from .reader import PsaReader
 
@@ -21,6 +22,9 @@ class PsaImportOptions(object):
         self.action_name_prefix = ''
         self.should_convert_to_samples = False
         self.bone_mapping_mode = 'CASE_INSENSITIVE'
+        self.fps_source = 'SEQUENCE'
+        self.fps_custom: float = 30.0
+        self.psa_config: PsaConfig = PsaConfig()
 
 
 class ImportBone(object):
@@ -29,9 +33,9 @@ class ImportBone(object):
         self.parent: Optional[ImportBone] = None
         self.armature_bone = None
         self.pose_bone = None
-        self.orig_loc: Vector = Vector()
-        self.orig_quat: Quaternion = Quaternion()
-        self.post_quat: Quaternion = Quaternion()
+        self.original_location: Vector = Vector()
+        self.original_rotation: Quaternion = Quaternion()
+        self.post_rotation: Quaternion = Quaternion()
         self.fcurves: List[FCurve] = []
 
 
@@ -39,17 +43,17 @@ def _calculate_fcurve_data(import_bone: ImportBone, key_data: typing.Iterable[fl
     # Convert world-space transforms to local-space transforms.
     key_rotation = Quaternion(key_data[0:4])
     key_location = Vector(key_data[4:])
-    q = import_bone.post_quat.copy()
-    q.rotate(import_bone.orig_quat)
+    q = import_bone.post_rotation.copy()
+    q.rotate(import_bone.original_rotation)
     quat = q
-    q = import_bone.post_quat.copy()
+    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())
-    loc = key_location - import_bone.orig_loc
-    loc.rotate(import_bone.post_quat.conjugated())
+    loc = key_location - import_bone.original_location
+    loc.rotate(import_bone.post_rotation.conjugated())
     return quat.w, quat.x, quat.y, quat.z, loc.x, loc.y, loc.z
 
 
@@ -140,23 +144,16 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
         if armature_bone.parent is not None and armature_bone.parent.name in psa_bone_names:
             import_bone.parent = import_bones_dict[armature_bone.parent.name]
         # Calculate the original location & rotation of each bone (in world-space maybe?)
-        if armature_bone.get('orig_quat') is not None:
-            # TODO: ideally we don't rely on bone auxiliary data like this, the non-aux data path is incorrect
-            # (animations are flipped 180 around Z)
-            import_bone.orig_quat = Quaternion(armature_bone['orig_quat'])
-            import_bone.orig_loc = Vector(armature_bone['orig_loc'])
-            import_bone.post_quat = Quaternion(armature_bone['post_quat'])
+        if import_bone.parent is not None:
+            import_bone.original_location = armature_bone.matrix_local.translation - armature_bone.parent.matrix_local.translation
+            import_bone.original_location.rotate(armature_bone.parent.matrix_local.to_quaternion().conjugated())
+            import_bone.original_rotation = armature_bone.matrix_local.to_quaternion()
+            import_bone.original_rotation.rotate(armature_bone.parent.matrix_local.to_quaternion().conjugated())
+            import_bone.original_rotation.conjugate()
         else:
-            if import_bone.parent is not None:
-                import_bone.orig_loc = armature_bone.matrix_local.translation - armature_bone.parent.matrix_local.translation
-                import_bone.orig_loc.rotate(armature_bone.parent.matrix_local.to_quaternion().conjugated())
-                import_bone.orig_quat = armature_bone.matrix_local.to_quaternion()
-                import_bone.orig_quat.rotate(armature_bone.parent.matrix_local.to_quaternion().conjugated())
-                import_bone.orig_quat.conjugate()
-            else:
-                import_bone.orig_loc = armature_bone.matrix_local.translation.copy()
-                import_bone.orig_quat = armature_bone.matrix_local.to_quaternion()
-            import_bone.post_quat = import_bone.orig_quat.conjugated()
+            import_bone.original_location = armature_bone.matrix_local.translation.copy()
+            import_bone.original_rotation = armature_bone.matrix_local.to_quaternion()
+        import_bone.post_rotation = import_bone.original_rotation.conjugated()
 
     context.window_manager.progress_begin(0, len(sequences))
 
@@ -167,11 +164,29 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
         sequence_name = sequence.name.decode('windows-1252')
         action_name = options.action_name_prefix + sequence_name
 
+        # Get the bone track flags for this sequence, or an empty dictionary if none exist.
+        sequence_bone_track_flags = dict()
+        if sequence_name in options.psa_config.sequence_bone_flags.keys():
+            sequence_bone_track_flags = options.psa_config.sequence_bone_flags[sequence_name]
+
         if options.should_overwrite and action_name in bpy.data.actions:
             action = bpy.data.actions[action_name]
         else:
             action = bpy.data.actions.new(name=action_name)
 
+        # Calculate the target FPS.
+        target_fps = sequence.fps
+        if options.fps_source == 'CUSTOM':
+            target_fps = options.fps_custom
+        elif options.fps_source == 'SCENE':
+            target_fps = context.scene.render.fps
+        elif options.fps_source == 'SEQUENCE':
+            target_fps = sequence.fps
+        else:
+            raise ValueError(f'Unknown FPS source: {options.fps_source}')
+
+        keyframe_time_dilation = target_fps / sequence.fps
+
         if options.should_write_keyframes:
             # Remove existing f-curves (replace with action.fcurves.clear() in Blender 3.2)
             while len(action.fcurves) > 0:
@@ -179,18 +194,21 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
 
             # Create f-curves for the rotation and location of each bone.
             for psa_bone_index, armature_bone_index in psa_to_armature_bone_indices.items():
+                bone_track_flags = sequence_bone_track_flags.get(psa_bone_index, 0)
                 import_bone = import_bones[psa_bone_index]
                 pose_bone = import_bone.pose_bone
                 rotation_data_path = pose_bone.path_from_id('rotation_quaternion')
                 location_data_path = pose_bone.path_from_id('location')
+                add_rotation_fcurves = (bone_track_flags & REMOVE_TRACK_ROTATION) == 0
+                add_location_fcurves = (bone_track_flags & REMOVE_TRACK_LOCATION) == 0
                 import_bone.fcurves = [
-                    action.fcurves.new(rotation_data_path, index=0, action_group=pose_bone.name),  # Qw
-                    action.fcurves.new(rotation_data_path, index=1, action_group=pose_bone.name),  # Qx
-                    action.fcurves.new(rotation_data_path, index=2, action_group=pose_bone.name),  # Qy
-                    action.fcurves.new(rotation_data_path, index=3, action_group=pose_bone.name),  # Qz
-                    action.fcurves.new(location_data_path, index=0, action_group=pose_bone.name),  # Lx
-                    action.fcurves.new(location_data_path, index=1, action_group=pose_bone.name),  # Ly
-                    action.fcurves.new(location_data_path, index=2, action_group=pose_bone.name),  # Lz
+                    action.fcurves.new(rotation_data_path, index=0, action_group=pose_bone.name) if add_rotation_fcurves else None,  # Qw
+                    action.fcurves.new(rotation_data_path, index=1, action_group=pose_bone.name) if add_rotation_fcurves else None,  # Qx
+                    action.fcurves.new(rotation_data_path, index=2, action_group=pose_bone.name) if add_rotation_fcurves else None,  # Qy
+                    action.fcurves.new(rotation_data_path, index=3, action_group=pose_bone.name) if add_rotation_fcurves else None,  # Qz
+                    action.fcurves.new(location_data_path, index=0, action_group=pose_bone.name) if add_location_fcurves else None,  # Lx
+                    action.fcurves.new(location_data_path, index=1, action_group=pose_bone.name) if add_location_fcurves else None,  # Ly
+                    action.fcurves.new(location_data_path, index=2, action_group=pose_bone.name) if add_location_fcurves else None,  # Lz
                 ]
 
             # Read the sequence data matrix from the PSA.
@@ -208,14 +226,20 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
 
             # Write the keyframes out.
             fcurve_data = numpy.zeros(2 * sequence.frame_count, dtype=float)
-            fcurve_data[0::2] = range(sequence.frame_count)
+
+            # Populate the keyframe time data.
+            fcurve_data[0::2] = [x * keyframe_time_dilation for x in range(sequence.frame_count)]
             for bone_index, import_bone in enumerate(import_bones):
                 if import_bone is None:
                     continue
                 for fcurve_index, fcurve in enumerate(import_bone.fcurves):
+                    if fcurve is None:
+                        continue
                     fcurve_data[1::2] = sequence_data_matrix[:, bone_index, fcurve_index]
                     fcurve.keyframe_points.add(sequence.frame_count)
                     fcurve.keyframe_points.foreach_set('co', fcurve_data)
+                    for fcurve_keyframe in fcurve.keyframe_points:
+                        fcurve_keyframe.interpolation = 'LINEAR'
 
             if options.should_convert_to_samples:
                 # Bake the curve to samples.
@@ -224,7 +248,7 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
 
         # Write meta-data.
         if options.should_write_metadata:
-            action['psa_sequence_fps'] = sequence.fps
+            action.psa_export.fps = target_fps
 
         action.use_fake_user = options.should_use_fake_user
 

io_scene_psk_psa/psk/builder.py

@@ -15,7 +15,7 @@ class PskInputObjects(object):
 class PskBuildOptions(object):
     def __init__(self):
         self.bone_filter_mode = 'ALL'
-        self.bone_group_indices: List[int] = []
+        self.bone_collection_indices: List[int] = []
         self.use_raw_mesh_data = True
         self.material_names: List[str] = []
         self.should_enforce_bone_name_restrictions = False
@@ -58,11 +58,17 @@ def get_psk_input_objects(context) -> PskInputObjects:
     return input_objects
 
 
-def build_psk(context, options: PskBuildOptions) -> Psk:
-    input_objects = get_psk_input_objects(context)
+class PskBuildResult(object):
+    def __init__(self):
+        self.psk = None
+        self.warnings = []
 
+
+def build_psk(context, options: PskBuildOptions) -> PskBuildResult:
+    input_objects = get_psk_input_objects(context)
     armature_object: bpy.types.Object = input_objects.armature_object
 
+    result = PskBuildResult()
     psk = Psk()
     bones = []
 
@@ -78,7 +84,7 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
         psk_bone.rotation = Quaternion.identity()
         psk.bones.append(psk_bone)
     else:
-        bone_names = get_export_bone_names(armature_object, options.bone_filter_mode, options.bone_group_indices)
+        bone_names = get_export_bone_names(armature_object, options.bone_filter_mode, options.bone_collection_indices)
         armature_data = typing.cast(Armature, armature_object.data)
         bones = [armature_data.bones[bone_name] for bone_name in bone_names]
 
@@ -88,7 +94,11 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
 
         for bone in bones:
             psk_bone = Psk.Bone()
-            psk_bone.name = bytes(bone.name, encoding='windows-1252')
+            try:
+                psk_bone.name = bytes(bone.name, encoding='windows-1252')
+            except UnicodeEncodeError:
+                raise RuntimeError(
+                    f'Bone name "{bone.name}" contains characters that cannot be encoded in the Windows-1252 codepage')
             psk_bone.flags = 0
             psk_bone.children_count = 0
 
@@ -129,14 +139,17 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
 
     for material_name in material_names:
         psk_material = Psk.Material()
-        psk_material.name = bytes(material_name, encoding='windows-1252')
+        try:
+            psk_material.name = bytes(material_name, encoding='windows-1252')
+        except UnicodeEncodeError:
+            raise RuntimeError(f'Material name "{material_name}" contains characters that cannot be encoded in the Windows-1252 codepage')
         psk_material.texture_index = len(psk.materials)
         psk.materials.append(psk_material)
 
     for input_mesh_object in input_objects.mesh_objects:
 
         # MATERIALS
-        material_indices = [material_names.index(material.name) for material in input_mesh_object.data.materials]
+        material_indices = [material_names.index(material_slot.material.name) for material_slot in input_mesh_object.material_slots]
 
         # MESH DATA
         if options.use_raw_mesh_data:
@@ -161,6 +174,10 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
             mesh_object = bpy.data.objects.new('', mesh_data)
             mesh_object.matrix_world = input_mesh_object.matrix_world
 
+            scale = (input_mesh_object.scale.x, input_mesh_object.scale.y, input_mesh_object.scale.z)
+            if any(map(lambda x: x < 0, scale)):
+                result.warnings.append(f'Mesh "{input_mesh_object.name}" has negative scaling which may result in inverted normals.')
+
             # Copy the vertex groups
             for vertex_group in input_mesh_object.vertex_groups:
                 mesh_object.vertex_groups.new(name=vertex_group.name)
@@ -271,4 +288,6 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
             bpy.data.meshes.remove(mesh_data)
             del mesh_data
 
-    return psk
+    result.psk = psk
+
+    return result

io_scene_psk_psa/psk/export/operators.py

@@ -4,14 +4,14 @@ 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_group_list
+from ...helpers import populate_bone_collection_list
 
 
 def is_bone_filter_mode_item_available(context, identifier):
     input_objects = get_psk_input_objects(context)
     armature_object = input_objects.armature_object
-    if identifier == 'BONE_GROUPS':
-        if not armature_object or not armature_object.pose or not armature_object.pose.bone_groups:
+    if identifier == 'BONE_COLLECTIONS':
+        if armature_object is None or armature_object.data is None or len(armature_object.data.collections) == 0:
             return False
     # else if... you can set up other conditions if you add more options
     return True
@@ -22,10 +22,11 @@ def populate_material_list(mesh_objects, material_list):
 
     material_names = []
     for mesh_object in mesh_objects:
-        for i, material in enumerate(mesh_object.data.materials):
+        for i, material_slot in enumerate(mesh_object.material_slots):
+            material = material_slot.material
             # TODO: put this in the poll arg?
             if material is None:
-                raise RuntimeError('Material cannot be empty (index ' + str(i) + ')')
+                raise RuntimeError('Material slot cannot be empty (index ' + str(i) + ')')
             if material.name not in material_names:
                 material_names.append(material.name)
 
@@ -94,8 +95,7 @@ class PSK_OT_export(Operator, ExportHelper):
 
         pg = getattr(context.scene, 'psk_export')
 
-        # Populate bone groups list.
-        populate_bone_group_list(input_objects.armature_object, pg.bone_group_list)
+        populate_bone_collection_list(input_objects.armature_object, pg.bone_collection_list)
 
         try:
             populate_material_list(input_objects.mesh_objects, pg.material_list)
@@ -136,10 +136,10 @@ class PSK_OT_export(Operator, ExportHelper):
             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_GROUPS':
+        if pg.bone_filter_mode == 'BONE_COLLECTIONS':
             row = box.row()
-            rows = max(3, min(len(pg.bone_group_list), 10))
-            row.template_list('PSX_UL_bone_group_list', '', pg, 'bone_group_list', pg, 'bone_group_list_index', rows=rows)
+            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)
 
         box.prop(pg, 'should_enforce_bone_name_restrictions')
 
@@ -147,7 +147,7 @@ class PSK_OT_export(Operator, ExportHelper):
         box = layout.box()
         box.label(text='Materials', icon='MATERIAL')
         row = box.row()
-        rows = max(3, min(len(pg.bone_group_list), 10))
+        rows = max(3, min(len(pg.bone_collection_list), 10))
         row.template_list('PSK_UL_materials', '', pg, 'material_list', pg, 'material_list_index', rows=rows)
         col = row.column(align=True)
         col.operator(PSK_OT_material_list_move_up.bl_idname, text='', icon='TRIA_UP')
@@ -157,18 +157,24 @@ class PSK_OT_export(Operator, ExportHelper):
         pg = context.scene.psk_export
         options = PskBuildOptions()
         options.bone_filter_mode = pg.bone_filter_mode
-        options.bone_group_indices = [x.index for x in pg.bone_group_list if x.is_selected]
+        options.bone_collection_indices = [x.index for x in pg.bone_collection_list if x.is_selected]
         options.use_raw_mesh_data = pg.use_raw_mesh_data
         options.material_names = [m.material_name for m in pg.material_list]
         options.should_enforce_bone_name_restrictions = pg.should_enforce_bone_name_restrictions
 
         try:
-            psk = build_psk(context, options)
-            write_psk(psk, self.filepath)
-            self.report({'INFO'}, f'PSK export successful')
+            result = build_psk(context, options)
+            for warning in result.warnings:
+                self.report({'WARNING'}, warning)
+            write_psk(result.psk, self.filepath)
+            if len(result.warnings) > 0:
+                self.report({'WARNING'}, f'PSK export successful with {len(result.warnings)} warnings')
+            else:
+                self.report({'INFO'}, f'PSK export successful')
         except RuntimeError as e:
             self.report({'ERROR_INVALID_CONTEXT'}, str(e))
             return {'CANCELLED'}
+    
         return {'FINISHED'}
 
 

io_scene_psk_psa/psk/export/properties.py

@@ -1,7 +1,7 @@
 from bpy.props import EnumProperty, CollectionProperty, IntProperty, BoolProperty, StringProperty
 from bpy.types import PropertyGroup
 
-from ...types import PSX_PG_bone_group_list_item
+from ...types import PSX_PG_bone_collection_list_item
 
 
 class PSK_PG_material_list_item(PropertyGroup):
@@ -16,12 +16,12 @@ class PSK_PG_export(PropertyGroup):
         description='',
         items=(
             ('ALL', 'All', 'All bones will be exported'),
-            ('BONE_GROUPS', 'Bone Groups',
-             'Only bones belonging to the selected bone groups and their ancestors will be exported')
+            ('BONE_COLLECTIONS', 'Bone Collections',
+             'Only bones belonging to the selected bone collections and their ancestors will be exported')
         )
     )
-    bone_group_list: CollectionProperty(type=PSX_PG_bone_group_list_item)
-    bone_group_list_index: IntProperty(default=0)
+    bone_collection_list: CollectionProperty(type=PSX_PG_bone_collection_list_item)
+    bone_collection_list_index: IntProperty(default=0)
     use_raw_mesh_data: BoolProperty(default=False, name='Raw Mesh Data', description='No modifiers will be evaluated as part of the exported mesh')
     material_list: CollectionProperty(type=PSK_PG_material_list_item)
     material_list_index: IntProperty(default=0)

io_scene_psk_psa/psk/importer.py

@@ -39,9 +39,9 @@ class ImportBone:
         self.world_rotation_matrix: Matrix = Matrix()
         self.world_matrix: Matrix = Matrix()
         self.vertex_group = None
-        self.orig_quat: Quaternion = Quaternion()
-        self.orig_loc: Vector = Vector()
-        self.post_quat: Quaternion = Quaternion()
+        self.original_rotation: Quaternion = Quaternion()
+        self.original_location: Vector = Vector()
+        self.post_rotation: Quaternion = Quaternion()
 
 
 class PskImportResult:
@@ -111,12 +111,6 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
             edit_bone_matrix.translation = import_bone.world_matrix.translation
             edit_bone.matrix = edit_bone_matrix
 
-            # Store bind pose information in the bone's custom properties.
-            # This information is used when importing animations from PSA files.
-            edit_bone['orig_quat'] = import_bone.local_rotation
-            edit_bone['orig_loc'] = import_bone.local_translation
-            edit_bone['post_quat'] = import_bone.local_rotation.conjugated()
-
     # MESH
     if options.should_import_mesh:
         mesh_data = bpy.data.meshes.new(options.name)
@@ -131,7 +125,7 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
                     # Material already exists, just re-use it.
                     material = bpy.data.materials[material_name]
                 elif is_bdk_addon_loaded() and psk.has_material_references:
-                    # Material does not yet exist and we have the BDK addon installed.
+                    # Material does not yet exist, and we have the BDK addon installed.
                     # Attempt to load it using BDK addon's operator.
                     material_reference = psk.material_references[material_index]
                     if material_reference and bpy.ops.bdk.link_material(reference=material_reference) == {'FINISHED'}:

io_scene_psk_psa/types.py

@@ -2,7 +2,7 @@ from bpy.props import StringProperty, IntProperty, BoolProperty, FloatProperty
 from bpy.types import PropertyGroup, UIList, UILayout, Context, AnyType, Panel
 
 
-class PSX_UL_bone_group_list(UIList):
+class PSX_UL_bone_collection_list(UIList):
 
     def draw_item(self, context: Context, layout: UILayout, data: AnyType, item: AnyType, icon: int,
                   active_data: AnyType, active_property: str, index: int = 0, flt_flag: int = 0):
@@ -11,7 +11,7 @@ class PSX_UL_bone_group_list(UIList):
         row.label(text=str(getattr(item, 'count')), icon='BONE_DATA')
 
 
-class PSX_PG_bone_group_list_item(PropertyGroup):
+class PSX_PG_bone_collection_list_item(PropertyGroup):
     name: StringProperty()
     index: IntProperty()
     count: IntProperty()
@@ -21,6 +21,7 @@ class PSX_PG_bone_group_list_item(PropertyGroup):
 class PSX_PG_action_export(PropertyGroup):
     compression_ratio: FloatProperty(name='Compression Ratio', default=1.0, min=0.0, max=1.0, subtype='FACTOR', description='The key sampling ratio of the exported sequence.\n\nA compression ratio of 1.0 will export all frames, while a compression ratio of 0.5 will export half of the frames')
     key_quota: IntProperty(name='Key Quota', default=0, min=1, description='The minimum number of frames to be exported')
+    fps: FloatProperty(name='FPS', default=30.0, min=0.0, description='The frame rate of the exported sequence')
 
 
 class PSX_PT_action(Panel):
@@ -38,13 +39,17 @@ class PSX_PT_action(Panel):
     def draw(self, context: 'Context'):
         action = context.active_action
         layout = self.layout
-        layout.prop(action.psa_export, 'compression_ratio')
-        layout.prop(action.psa_export, 'key_quota')
+        flow = layout.grid_flow(columns=1)
+        flow.use_property_split = True
+        flow.use_property_decorate = False
+        flow.prop(action.psa_export, 'compression_ratio')
+        flow.prop(action.psa_export, 'key_quota')
+        flow.prop(action.psa_export, 'fps')
 
 
 classes = (
     PSX_PG_action_export,
-    PSX_PG_bone_group_list_item,
-    PSX_UL_bone_group_list,
+    PSX_PG_bone_collection_list_item,
+    PSX_UL_bone_collection_list,
     PSX_PT_action
 )