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# Copyright 2019 The glTF-Blender-IO authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import bpy
def simulate_stash(obj, track_name, action, start_frame=None):
# Simulate stash :
# * add a track
# * add an action on track
# * lock & mute the track
# * remove active action from object
tracks = obj.animation_data.nla_tracks
new_track = tracks.new(prev=None)
new_track.name = track_name
if start_frame is None:
start_frame = bpy.context.scene.frame_start
strip = new_track.strips.new(action.name, start_frame, action)
new_track.lock = True
new_track.mute = True
obj.animation_data.action = None
def restore_animation_on_object(obj, anim_name):
if not getattr(obj, 'animation_data', None):
return
for track in obj.animation_data.nla_tracks:
if track.name != anim_name:
continue
if not track.strips:
continue
obj.animation_data.action = track.strips[0].action
return
obj.animation_data.action = None
def make_fcurve(action, co, data_path, index=0, group_name=None, interpolation=None):
try:
fcurve = action.fcurves.new(data_path=data_path, index=index)
except:
# Some non valid files can have multiple target path
return None
if group_name:
if group_name not in action.groups:
action.groups.new(group_name)
group = action.groups[group_name]
fcurve.group = group
fcurve.keyframe_points.add(len(co) // 2)
fcurve.keyframe_points.foreach_set('co', co)
# Setting interpolation
if interpolation == 'CUBICSPLINE':
for kf in fcurve.keyframe_points:
kf.interpolation = 'BEZIER'
kf.handle_right_type = 'AUTO'
kf.handle_left_type = 'AUTO'
else:
if interpolation == 'LINEAR':
blender_interpolation = 'LINEAR'
elif interpolation == 'STEP':
blender_interpolation = 'CONSTANT'
else:
blender_interpolation = 'LINEAR'
for kf in fcurve.keyframe_points:
kf.interpolation = blender_interpolation
fcurve.update() # force updating tangents (this may change when tangent will be managed)
return fcurve
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