def traverse_animation_curves(fbx_scene, fbx_node, fbx_layer, egg_parent):
for i in range(fbx_node.GetChildCount()):
fbx_child = fbx_node.GetChild(i)
if fbx_child.GetSkeleton() is None:
continue
xform_new = EggXfmSAnim("xform")
xform_new.setOrder(EggXfmSAnim.getStandardOrder())
# xform_new.setOrder("shprt")
xform_new.setFps(30)
for transform in get_transforms(fbx_child, fbx_layer):
xform_new.addData(transform)
egg_table = EggTable(fbx_child.GetName())
egg_table.addChild(xform_new)
egg_parent.addChild(egg_table)
traverse_animation_curves(fbx_scene, fbx_child, fbx_layer, egg_table)
def fbx2egg_animation(fbx_path, egg_path):
manager, scene = FbxCommon.InitializeSdkObjects()
FbxCommon.LoadScene(manager, scene, fbx_path)
prepare_scene(scene)
data = EggData()
data.addChild(EggCoordinateSystem(CSYupRight))
skeleton = EggTable("<skeleton>")
walking = EggTable("walking") # TODO: get name from animation layer
walking.setTableType(EggTable.stringTableType("bundle"))
walking.addChild(skeleton)
table = EggTable()
table.addChild(walking)
for layer in get_anim_layers(scene):
traverse_animation_curves(scene, scene.GetRootNode(), layer, skeleton)
data.addChild(table)
data.writeEgg(egg_path)
def make_action(self, node, armature):
# <-- root table
egg_root_table = EggTable('')
# <-- animation bundle
egg_animation = EggTable('Armature')
egg_animation.set_table_type(EggTable.TT_bundle)
# <-- skeleton table
egg_skeleton = EggTable('<skeleton>')
# setup bones
egg_joints = {}
egg_joints_anims = {}
for bone_name, bone in armature.data.bones.items():
# <-- joint table
egg_joint = EggTable(bone_name)
# <-- xfm_anim_s
egg_xfm_anim_s = EggXfmSAnim('xform', CS_zup_right)
# set order from glTF
# i, j, k - scale -> s
# h, p, r - rotation
# x, y, z - location -> ?
# egg_xfm_anim_s.set_order('shprxyz')
egg_xfm_anim_s.set_fps(bpy.context.scene.render.fps /
bpy.context.scene.render.fps_base)
egg_joint.add_child(egg_xfm_anim_s)
egg_joints_anims[bone_name] = egg_xfm_anim_s
# xfm_anim_s -->
if bone.parent:
egg_joints[bone.parent.name].add_child(egg_joint)
else: # root bone
egg_skeleton.add_child(egg_joint)
egg_joints[bone_name] = egg_joint
# joint table -->
# set animation data
frame_start = bpy.context.scene.frame_start
frame_end = bpy.context.scene.frame_end
if self._action and self._action in bpy.data.actions:
action = bpy.data.actions[self._action]
armature.animation_data.action = action
frame_start, frame_end = action.frame_range
frame = float(frame_start)
frame_int = None
while frame <= frame_end:
# switch frame
if frame_int != math.floor(frame):
frame_int = math.floor(frame)
bpy.context.scene.frame_current = frame_int
bpy.context.scene.frame_set(frame_int)
if isinstance(self._speed_scale, collections.Callable):
speed_scale = self._speed_scale(frame_int)
else:
speed_scale = self._speed_scale
# switch subframe
if speed_scale != 1:
bpy.context.scene.frame_subframe = frame - frame_int
# save bone matrices
for bone_name, bone in armature.pose.bones.items():
s_anim = egg_joints_anims[bone_name]
bone_matrix = get_bone_matrix(bone, armature)
# egg_joints_anims[bone_name].add_data(matrix_to_panda(bone_matrix))
i, j, k = bone_matrix.to_scale()
s_anim.add_component_data('i', i)
s_anim.add_component_data('j', j)
s_anim.add_component_data('k', k)
# if bone.parent:
# p, r, h = tuple(map(math.degrees, bone_matrix.to_euler())) # YABEE
# s_anim.add_component_data('h', h)
# s_anim.add_component_data('p', p)
# s_anim.add_component_data('r', r)
# else:
# h, r, p = tuple(map(math.degrees, bone_matrix.to_euler('XZY')))
# s_anim.add_component_data('h', -h)
# s_anim.add_component_data('p', p)
# s_anim.add_component_data('r', r)
# hpr == zxy ?
p, r, h = tuple(map(math.degrees, bone_matrix.to_euler('YXZ')))
s_anim.add_component_data('h', h)
s_anim.add_component_data('p', p)
s_anim.add_component_data('r', r)
x, y, z = bone_matrix.to_translation()
s_anim.add_component_data('x', x)
s_anim.add_component_data('y', y)
s_anim.add_component_data('z', z)
# advance to the next frame
frame += speed_scale
egg_animation.add_child(egg_skeleton)
# skeleton table -->
egg_root_table.add_child(egg_animation)
# animation bundle -->
# root table -->
node.add_child(egg_root_table)