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glTF exporter: remove some channel animation if bone is not animated 

Check is done after sampling: if animated is constant and bone has no fcurve, we remove the channel
This commit is contained in:
Julien Duroure 2021-08-23 19:16:18 +02:00
parent 760b5d3a46
commit 1757ec91e5
4 changed files with 71 additions and 11 deletions
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2
io_scene_gltf2/__init__.py
View File

@ -15,7 +15,7 @@
bl_info = {
'name': 'glTF 2.0 format',
'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
"version": (1, 7, 21),
"version": (1, 7, 22),
'blender': (2, 91, 0),
'location': 'File > Import-Export',
'description': 'Import-Export as glTF 2.0',

44
io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_channels.py
View File

@ -69,6 +69,11 @@ def gather_animation_channels(blender_action: bpy.types.Action,
bones_to_be_animated, _, _ = gltf2_blender_gather_skins.get_bone_tree(None, blender_object)
bones_to_be_animated = [blender_object.pose.bones[b.name] for b in bones_to_be_animated]
list_of_animated_bone_channels = []
for channel_group in __get_channel_groups(blender_action, blender_object, export_settings):
channel_group_sorted = __get_channel_group_sorted(channel_group, blender_object)
list_of_animated_bone_channels.extend([(gltf2_blender_get.get_object_from_datapath(blender_object, get_target_object_path(i.data_path)).name, get_target_property_name(i.data_path)) for i in channel_group])
for bone in bones_to_be_animated:
for p in ["location", "rotation_quaternion", "scale"]:
channel = __gather_animation_channel(
@ -80,8 +85,10 @@ def gather_animation_channels(blender_action: bpy.types.Action,
bake_range_start,
bake_range_end,
blender_action.name,
None)
channels.append(channel)
None,
(bone.name, p) in list_of_animated_bone_channels)
if channel is not None:
channels.append(channel)
# Retrieve animation on armature object itself, if any
@ -91,7 +98,7 @@ def gather_animation_channels(blender_action: bpy.types.Action,
if len(channel_group) == 0:
# Only errors on channels, ignoring
continue
channel = __gather_animation_channel(channel_group, blender_object, export_settings, None, None, bake_range_start, bake_range_end, blender_action.name, None)
channel = __gather_animation_channel(channel_group, blender_object, export_settings, None, None, bake_range_start, bake_range_end, blender_action.name, None, False)
if channel is not None:
channels.append(channel)
@ -109,7 +116,8 @@ def gather_animation_channels(blender_action: bpy.types.Action,
bake_range_start,
bake_range_end,
blender_action.name,
obj)
obj,
False)
channels.append(channel)
else:
@ -118,7 +126,17 @@ def gather_animation_channels(blender_action: bpy.types.Action,
if len(channel_group_sorted) == 0:
# Only errors on channels, ignoring
continue
channel = __gather_animation_channel(channel_group_sorted, blender_object, export_settings, None, None, bake_range_start, bake_range_end, blender_action.name, None)
channel = __gather_animation_channel(
channel_group_sorted,
blender_object,
export_settings,
None,
None,
bake_range_start,
bake_range_end,
blender_action.name,
None,
False)
if channel is not None:
channels.append(channel)
@ -189,17 +207,25 @@ def __gather_animation_channel(channels: typing.Tuple[bpy.types.FCurve],
bake_range_start,
bake_range_end,
action_name: str,
driver_obj
driver_obj,
node_channel_is_animated: bool
) -> typing.Union[gltf2_io.AnimationChannel, None]:
if not __filter_animation_channel(channels, blender_object, export_settings):
return None
__target= __gather_target(channels, blender_object, export_settings, bake_bone, bake_channel, driver_obj)
if __target.path is not None:
sampler = __gather_sampler(channels, blender_object, export_settings, bake_bone, bake_channel, bake_range_start, bake_range_end, action_name, driver_obj, node_channel_is_animated)
if sampler is None:
# After check, no need to animate this node for this channel
return None
animation_channel = 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, driver_obj),
sampler=sampler,
target=__target
)
@ -249,7 +275,8 @@ def __gather_sampler(channels: typing.Tuple[bpy.types.FCurve],
bake_range_start,
bake_range_end,
action_name,
driver_obj
driver_obj,
node_channel_is_animated: bool
) -> gltf2_io.AnimationSampler:
return gltf2_blender_gather_animation_samplers.gather_animation_sampler(
channels,
@ -260,6 +287,7 @@ def __gather_sampler(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated,
export_settings
)

17
io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_sampler_keyframes.py
View File

@ -22,6 +22,7 @@ from io_scene_gltf2.blender.exp import gltf2_blender_get
from io_scene_gltf2.blender.exp.gltf2_blender_gather_drivers import get_sk_drivers, get_sk_driver_values
from . import gltf2_blender_export_keys
from io_scene_gltf2.io.com import gltf2_io_debug
import numpy as np
class Keyframe:
@ -193,6 +194,7 @@ def gather_keyframes(blender_object_if_armature: typing.Optional[bpy.types.Objec
bake_range_end,
action_name: str,
driver_obj,
node_channel_is_animated: bool,
export_settings
) -> typing.List[Keyframe]:
"""Convert the blender action groups' fcurves to keyframes for use in glTF."""
@ -309,6 +311,21 @@ def gather_keyframes(blender_object_if_armature: typing.Optional[bpy.types.Objec
keyframes.append(key)
# For armature only
# Check if all values are the same
# In that case, if there is no real keyframe on this channel for this given bone,
# We can ignore this keyframes
# if there are some fcurve, we can keep only 2 keyframes, first and last
if blender_object_if_armature is not None:
std = np.ptp(np.ptp([[k.value[i] for i in range(len(keyframes[0].value))] for k in keyframes], axis=0))
if node_channel_is_animated is True: # fcurve on this bone for this property
# Keep animation, but keep only 2 keyframes if data are not changing
return [keyframes[0], keyframes[-1]] if std < 0.0001 and len(keyframes) >= 2 else keyframes
else: # bone is not animated (no fcurve)
# Not keeping if not changing property
return None if std < 0.0001 else keyframes
return keyframes

19
io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_samplers.py
View File

@ -39,6 +39,7 @@ def gather_animation_sampler(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name: str,
driver_obj,
node_channel_is_animated: bool,
export_settings
) -> gltf2_io.AnimationSampler:
@ -61,11 +62,17 @@ def gather_animation_sampler(channels: typing.Tuple[bpy.types.FCurve],
else:
matrix_parent_inverse = mathutils.Matrix.Identity(4).freeze()
input = __gather_input(channels, blender_object_if_armature, non_keyed_values,
bake_bone, bake_channel, bake_range_start, bake_range_end, action_name, driver_obj, node_channel_is_animated, export_settings)
if input is None:
# After check, no need to animate this node for this channel
return None
sampler = gltf2_io.AnimationSampler(
extensions=__gather_extensions(channels, blender_object_if_armature, export_settings, bake_bone, bake_channel),
extras=__gather_extras(channels, blender_object_if_armature, export_settings, bake_bone, bake_channel),
input=__gather_input(channels, blender_object_if_armature, non_keyed_values,
bake_bone, bake_channel, bake_range_start, bake_range_end, action_name, driver_obj, export_settings),
input=input,
interpolation=__gather_interpolation(channels, blender_object_if_armature, export_settings, bake_bone, bake_channel),
output=__gather_output(channels,
matrix_parent_inverse,
@ -77,6 +84,7 @@ def gather_animation_sampler(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated,
export_settings)
)
@ -229,6 +237,7 @@ def __gather_input(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated: bool,
export_settings
) -> gltf2_io.Accessor:
"""Gather the key time codes."""
@ -241,7 +250,11 @@ def __gather_input(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated,
export_settings)
if keyframes is None:
# After check, no need to animation this node
return None
times = [k.seconds for k in keyframes]
return gltf2_blender_gather_accessors.gather_accessor(
@ -306,6 +319,7 @@ def __gather_output(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated: bool,
export_settings
) -> gltf2_io.Accessor:
"""Gather the data of the keyframes."""
@ -318,6 +332,7 @@ def __gather_output(channels: typing.Tuple[bpy.types.FCurve],
bake_range_end,
action_name,
driver_obj,
node_channel_is_animated,
export_settings)
if bake_bone is not None:
target_datapath = "pose.bones['" + bake_bone + "']." + bake_channel