1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
# Copyright 2018 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
from mathutils import Vector
from ..com.gltf2_blender_conversion import loc_gltf_to_blender, quaternion_gltf_to_blender, scale_gltf_to_blender
from ...io.imp.gltf2_io_binary import BinaryData
class BlenderNodeAnim():
"""Blender Object Animation."""
def __new__(cls, *args, **kwargs):
raise RuntimeError("%s should not be instantiated" % cls)
@staticmethod
def set_interpolation(interpolation, kf):
"""Manage interpolation."""
if interpolation == "LINEAR":
kf.interpolation = 'LINEAR'
elif interpolation == "STEP":
kf.interpolation = 'CONSTANT'
elif interpolation == "CUBICSPLINE":
kf.interpolation = 'BEZIER'
else:
kf.interpolation = 'BEZIER'
@staticmethod
def anim(gltf, anim_idx, node_idx):
"""Manage animation."""
node = gltf.data.nodes[node_idx]
obj = bpy.data.objects[node.blender_object]
fps = bpy.context.scene.render.fps
if anim_idx not in node.animations.keys():
return
animation = gltf.data.animations[anim_idx]
if animation.name:
name = animation.name + "_" + obj.name
else:
name = "Animation_" + str(anim_idx) + "_" + obj.name
action = bpy.data.actions.new(name)
# Check if this action has some users.
# If no user (only 1 indeed), that means that this action must be deleted
# (is an action from a deleted action)
if action.users == 1:
bpy.data.actions.remove(action)
action = bpy.data.actions.new(name)
if not obj.animation_data:
obj.animation_data_create()
obj.animation_data.action = bpy.data.actions[action.name]
for channel_idx in node.animations[anim_idx]:
channel = animation.channels[channel_idx]
keys = BinaryData.get_data_from_accessor(gltf, animation.samplers[channel.sampler].input)
values = BinaryData.get_data_from_accessor(gltf, animation.samplers[channel.sampler].output)
if channel.target.path in ['translation', 'rotation', 'scale']:
if channel.target.path == "translation":
blender_path = "location"
for idx, key in enumerate(keys):
if animation.samplers[channel.sampler].interpolation == "CUBICSPLINE":
# TODO manage tangent?
obj.location = Vector(loc_gltf_to_blender(list(values[idx * 3 + 1])))
else:
obj.location = Vector(loc_gltf_to_blender(list(values[idx])))
obj.keyframe_insert(blender_path, frame=key[0] * fps, group='location')
# Setting interpolation
for fcurve in [curve for curve in obj.animation_data.action.fcurves
if curve.group.name == "location"]:
for kf in fcurve.keyframe_points:
BlenderNodeAnim.set_interpolation(animation.samplers[channel.sampler].interpolation, kf)
elif channel.target.path == "rotation":
blender_path = "rotation_quaternion"
for idx, key in enumerate(keys):
if animation.samplers[channel.sampler].interpolation == "CUBICSPLINE":
# TODO manage tangent?
obj.rotation_quaternion = quaternion_gltf_to_blender(values[idx * 3 + 1])
else:
obj.rotation_quaternion = quaternion_gltf_to_blender(values[idx])
obj.keyframe_insert(blender_path, frame=key[0] * fps, group='rotation')
# Setting interpolation
for fcurve in [curve for curve in obj.animation_data.action.fcurves
if curve.group.name == "rotation"]:
for kf in fcurve.keyframe_points:
BlenderNodeAnim.set_interpolation(animation.samplers[channel.sampler].interpolation, kf)
elif channel.target.path == "scale":
blender_path = "scale"
for idx, key in enumerate(keys):
# TODO manage tangent?
if animation.samplers[channel.sampler].interpolation == "CUBICSPLINE":
obj.scale = Vector(scale_gltf_to_blender(list(values[idx * 3 + 1])))
else:
obj.scale = Vector(scale_gltf_to_blender(list(values[idx])))
obj.keyframe_insert(blender_path, frame=key[0] * fps, group='scale')
# Setting interpolation
for fcurve in [curve for curve in obj.animation_data.action.fcurves if curve.group.name == "scale"]:
for kf in fcurve.keyframe_points:
BlenderNodeAnim.set_interpolation(animation.samplers[channel.sampler].interpolation, kf)
elif channel.target.path == 'weights':
# retrieve number of targets
nb_targets = 0
for prim in gltf.data.meshes[gltf.data.nodes[node_idx].mesh].primitives:
if prim.targets:
if len(prim.targets) > nb_targets:
nb_targets = len(prim.targets)
for idx, key in enumerate(keys):
for sk in range(nb_targets):
obj.data.shape_keys.key_blocks[sk + 1].value = values[idx * nb_targets + sk][0]
obj.data.shape_keys.key_blocks[sk + 1].keyframe_insert(
"value",
frame=key[0] * fps,
group='ShapeKeys'
)
|
