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# Copyright 2018-2019 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
import typing
from ..com.gltf2_blender_data_path import get_target_object_path, get_target_property_name
from io_scene_gltf2.io.com import gltf2_io
from io_scene_gltf2.io.com import gltf2_io_debug
from io_scene_gltf2.blender.exp.gltf2_blender_gather_cache import cached
from io_scene_gltf2.blender.exp import gltf2_blender_gather_animation_samplers
from io_scene_gltf2.blender.exp import gltf2_blender_gather_animation_channel_target
from io_scene_gltf2.blender.exp import gltf2_blender_get
@cached
def gather_animation_channels(blender_action: bpy.types.Action,
blender_object: bpy.types.Object,
export_settings
) -> typing.List[gltf2_io.AnimationChannel]:
channels = []
if blender_object.type == "ARMATURE" and export_settings['gltf_force_sampling'] is True:
# We have to store sampled animation data for every deformation bones
# First calculate range of animation for baking
bake_range_start = None
bake_range_end = None
groups = __get_channel_groups(blender_action, blender_object, export_settings)
for chans in groups:
ranges = [channel.range() for channel in chans]
if bake_range_start is None:
bake_range_start = min([channel.range()[0] for channel in chans])
else:
bake_range_start = min(bake_range_start, min([channel.range()[0] for channel in chans]))
if bake_range_end is None:
bake_range_end = max([channel.range()[1] for channel in chans])
else:
bake_range_end = max(bake_range_end, max([channel.range()[1] for channel in chans]))
# Then bake all bones
for bone in blender_object.data.bones:
for p in ["location", "rotation_quaternion", "scale"]:
channel = __gather_animation_channel(
(),
blender_object,
export_settings,
bone.name,
p,
bake_range_start,
bake_range_end,
blender_action.name)
channels.append(channel)
else:
for channel_group in __get_channel_groups(blender_action, blender_object, export_settings):
channel = __gather_animation_channel(channel_group, blender_object, export_settings, None, None, None, None, blender_action.name)
if channel is not None:
channels.append(channel)
return channels
def __gather_animation_channel(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings,
bake_bone: typing.Union[str, None],
bake_channel: typing.Union[str, None],
bake_range_start,
bake_range_end,
action_name: str
) -> typing.Union[gltf2_io.AnimationChannel, None]:
if not __filter_animation_channel(channels, blender_object, export_settings):
return None
return gltf2_io.AnimationChannel(
extensions=__gather_extensions(channels, blender_object, export_settings, bake_bone),
extras=__gather_extras(channels, blender_object, export_settings, bake_bone),
sampler=__gather_sampler(channels, blender_object, export_settings, bake_bone, bake_channel, bake_range_start, bake_range_end, action_name),
target=__gather_target(channels, blender_object, export_settings, bake_bone, bake_channel)
)
def __filter_animation_channel(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings
) -> bool:
return True
def __gather_extensions(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings,
bake_bone: typing.Union[str, None]
) -> typing.Any:
return None
def __gather_extras(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings,
bake_bone: typing.Union[str, None]
) -> typing.Any:
return None
def __gather_sampler(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings,
bake_bone: typing.Union[str, None],
bake_channel: typing.Union[str, None],
bake_range_start,
bake_range_end,
action_name
) -> gltf2_io.AnimationSampler:
return gltf2_blender_gather_animation_samplers.gather_animation_sampler(
channels,
blender_object,
bake_bone,
bake_channel,
bake_range_start,
bake_range_end,
action_name,
export_settings
)
def __gather_target(channels: typing.Tuple[bpy.types.FCurve],
blender_object: bpy.types.Object,
export_settings,
bake_bone: typing.Union[str, None],
bake_channel: typing.Union[str, None]
) -> gltf2_io.AnimationChannelTarget:
return gltf2_blender_gather_animation_channel_target.gather_animation_channel_target(
channels, blender_object, bake_bone, bake_channel, export_settings)
def __get_channel_groups(blender_action: bpy.types.Action, blender_object: bpy.types.Object, export_settings):
targets = {}
for fcurve in blender_action.fcurves:
# In some invalid files, channel hasn't any keyframes ... this channel need to be ignored
if len(fcurve.keyframe_points) == 0:
continue
try:
target_property = get_target_property_name(fcurve.data_path)
except:
gltf2_io_debug.print_console("WARNING", "Invalid animation fcurve name on action {}".format(blender_action.name))
continue
object_path = get_target_object_path(fcurve.data_path)
# find the object affected by this action
if not object_path:
target = blender_object
else:
try:
target = gltf2_blender_get.get_object_from_datapath(blender_object, object_path)
except ValueError as e:
# if the object is a mesh and the action target path can not be resolved, we know that this is a morph
# animation.
if blender_object.type == "MESH":
# if you need the specific shape key for some reason, this is it:
# shape_key = blender_object.data.shape_keys.path_resolve(object_path)
target = blender_object.data.shape_keys
else:
gltf2_io_debug.print_console("WARNING", "Animation target {} not found".format(object_path))
continue
# group channels by target object and affected property of the target
target_properties = targets.get(target, {})
channels = target_properties.get(target_property, [])
channels.append(fcurve)
target_properties[target_property] = channels
targets[target] = target_properties
groups = []
for p in targets.values():
groups += list(p.values())
return map(tuple, groups)
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