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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
class BlenderSkin():
"""Blender Skinning / Armature."""
def __new__(cls, *args, **kwargs):
raise RuntimeError("%s should not be instantiated" % cls)
@staticmethod
def create_vertex_groups(gltf):
"""Create vertex groups for all skinned meshes."""
for vnode in gltf.vnodes.values():
if vnode.mesh_node_idx is None:
continue
pynode = gltf.data.nodes[vnode.mesh_node_idx]
if pynode.skin is None:
continue
pyskin = gltf.data.skins[pynode.skin]
obj = vnode.blender_object
for node_idx in pyskin.joints:
bone = gltf.vnodes[node_idx]
obj.vertex_groups.new(name=bone.blender_bone_name)
@staticmethod
def create_armature_modifiers(gltf):
"""Create Armature modifiers for all skinned meshes."""
for vnode in gltf.vnodes.values():
if vnode.mesh_node_idx is None:
continue
pynode = gltf.data.nodes[vnode.mesh_node_idx]
if pynode.skin is None:
continue
pyskin = gltf.data.skins[pynode.skin]
first_bone = gltf.vnodes[pyskin.joints[0]]
arma = gltf.vnodes[first_bone.bone_arma]
obj = vnode.blender_object
mod = obj.modifiers.new(name="Armature", type="ARMATURE")
mod.object = arma.blender_object
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