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# SPDX-License-Identifier: GPL-2.0-or-later
"""
Pose Library - Conversion of old pose libraries.
"""
from typing import Optional
from collections.abc import Collection
if "pose_creation" not in locals():
from . import pose_creation
else:
import importlib
pose_creation = importlib.reload(pose_creation)
import bpy
from bpy.types import (
Action,
TimelineMarker,
)
def convert_old_poselib(old_poselib: Action) -> Collection[Action]:
"""Convert an old-style pose library to a set of pose Actions.
Old pose libraries were one Action with multiple pose markers. Each pose
marker will be converted to an Action by itself and marked as asset.
"""
pose_assets = [
action
for marker in old_poselib.pose_markers
if (action := convert_old_pose(old_poselib, marker))
]
# Mark all Actions as assets in one go. Ideally this would be done on an
# appropriate frame in the scene (to set up things like the background
# colour), but the old-style poselib doesn't contain such information. All
# we can do is just render on the current frame.
bpy.ops.asset.mark({'selected_ids': pose_assets})
return pose_assets
def convert_old_pose(old_poselib: Action, marker: TimelineMarker) -> Optional[Action]:
"""Convert an old-style pose library pose to a pose action."""
frame: int = marker.frame
action: Optional[Action] = None
for fcurve in old_poselib.fcurves:
key = pose_creation.find_keyframe(fcurve, frame)
if not key:
continue
if action is None:
action = bpy.data.actions.new(marker.name)
pose_creation.create_single_key_fcurve(action, fcurve, key)
return action
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