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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
from math import sqrt
from mathutils import Quaternion
from .gltf2_blender_node import BlenderNode
from .gltf2_blender_skin import BlenderSkin
from .gltf2_blender_animation import BlenderAnimation
from .gltf2_blender_animation_utils import simulate_stash
from .gltf2_blender_vnode import VNode, compute_vnodes
class BlenderScene():
"""Blender Scene."""
def __new__(cls, *args, **kwargs):
raise RuntimeError("%s should not be instantiated" % cls)
@staticmethod
def create(gltf):
"""Scene creation."""
scene = bpy.context.scene
gltf.blender_scene = scene.name
if bpy.context.collection.name in bpy.data.collections: # avoid master collection
gltf.blender_active_collection = bpy.context.collection.name
if scene.render.engine not in ['CYCLES', 'BLENDER_EEVEE']:
scene.render.engine = "BLENDER_EEVEE"
compute_vnodes(gltf)
gltf.display_current_node = 0 # for debugging
BlenderNode.create_vnode(gltf, 'root')
# Now that all mesh / bones are created, create vertex groups on mesh
if gltf.data.skins:
BlenderSkin.create_vertex_groups(gltf)
BlenderSkin.create_armature_modifiers(gltf)
BlenderScene.create_animations(gltf)
if bpy.context.mode != 'OBJECT':
bpy.ops.object.mode_set(mode='OBJECT')
BlenderScene.set_active_object(gltf)
@staticmethod
def create_animations(gltf):
"""Create animations."""
if gltf.data.animations:
for anim_idx, anim in enumerate(gltf.data.animations):
# Caches the action for each object (keyed by object name)
gltf.action_cache = {}
# Things we need to stash when we're done.
gltf.needs_stash = []
BlenderAnimation.anim(gltf, anim_idx, 'root')
for (obj, anim_name, action) in gltf.needs_stash:
simulate_stash(obj, anim_name, action)
# Restore first animation
anim_name = gltf.data.animations[0].track_name
BlenderAnimation.restore_animation(gltf, 'root', anim_name)
@staticmethod
def set_active_object(gltf):
"""Make the first root object from the default glTF scene active.
If no default scene, use the first scene, or just any root object.
"""
if gltf.data.scenes:
pyscene = gltf.data.scenes[gltf.data.scene or 0]
vnode = gltf.vnodes[pyscene.nodes[0]]
if gltf.vnodes[vnode.parent].type != VNode.DummyRoot:
vnode = gltf.vnodes[vnode.parent]
else:
vnode = gltf.vnodes['root']
if vnode.type == VNode.DummyRoot:
if not vnode.children:
return # no nodes
vnode = gltf.vnodes[vnode.children[0]]
bpy.context.view_layer.objects.active = vnode.blender_object
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