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# SPDX-License-Identifier: GPL-2.0-or-later
import bpy
from typing import Optional
from itertools import count
from bpy.types import PoseBone
from ..utils.rig import connected_children_names
from ..utils.naming import strip_org, make_derived_name
from ..utils.bones import (put_bone, flip_bone, flip_bone_chain, is_same_position,
is_connected_position)
from ..utils.bones import copy_bone_position, connect_bbone_chain_handles
from ..utils.widgets_basic import create_bone_widget, create_sphere_widget
from ..utils.misc import map_list
from ..base_rig import BaseRig, stage
class SimpleChainRig(BaseRig):
"""A rig that consists of 3 connected chains of control, org and deform bones."""
def find_org_bones(self, bone: PoseBone):
return [bone.name] + connected_children_names(self.obj, bone.name)
min_chain_length = 2
bbone_segments = None
rig_parent_bone: str # Bone to be used as parent of the whole rig
def initialize(self):
if len(self.bones.org) < self.min_chain_length:
self.raise_error(
"Input to rig type must be a chain of {} or more bones.", self.min_chain_length)
def parent_bones(self):
self.rig_parent_bone = self.get_bone_parent(self.bones.org[0])
##############################
# BONES
class CtrlBones(BaseRig.CtrlBones):
fk: list[str] # FK control chain
class MchBones(BaseRig.MchBones):
pass
bones: BaseRig.ToplevelBones[list[str], CtrlBones, MchBones, list[str]]
##############################
# Control chain
@stage.generate_bones
def make_control_chain(self):
self.bones.ctrl.fk = map_list(self.make_control_bone, count(0), self.bones.org)
def make_control_bone(self, i: int, org: str):
return self.copy_bone(org, make_derived_name(org, 'ctrl'), parent=True)
@stage.parent_bones
def parent_control_chain(self):
self.parent_bone_chain(self.bones.ctrl.fk, use_connect=True)
@stage.configure_bones
def configure_control_chain(self):
for args in zip(count(0), self.bones.ctrl.fk, self.bones.org):
self.configure_control_bone(*args)
def configure_control_bone(self, i: int, ctrl: str, org: str):
self.copy_bone_properties(org, ctrl)
@stage.generate_widgets
def make_control_widgets(self):
for args in zip(count(0), self.bones.ctrl.fk):
self.make_control_widget(*args)
def make_control_widget(self, i: int, ctrl: str):
create_bone_widget(self.obj, ctrl)
##############################
# ORG chain
@stage.parent_bones
def parent_org_chain(self):
pass
@stage.rig_bones
def rig_org_chain(self):
for args in zip(count(0), self.bones.org, self.bones.ctrl.fk):
self.rig_org_bone(*args)
def rig_org_bone(self, i: int, org: str, ctrl: str):
self.make_constraint(org, 'COPY_TRANSFORMS', ctrl)
##############################
# Deform chain
@stage.generate_bones
def make_deform_chain(self):
self.bones.deform = map_list(self.make_deform_bone, count(0), self.bones.org)
def make_deform_bone(self, i: int, org: str):
name = self.copy_bone(org, make_derived_name(org, 'def'), parent=True, bbone=True)
if self.bbone_segments:
self.get_bone(name).bbone_segments = self.bbone_segments
return name
@stage.parent_bones
def parent_deform_chain(self):
self.parent_bone_chain(self.bones.deform, use_connect=True)
@stage.rig_bones
def rig_deform_chain(self):
for args in zip(count(0), self.bones.deform, self.bones.org):
self.rig_deform_bone(*args)
def rig_deform_bone(self, i: int, deform: str, org: str):
self.make_constraint(deform, 'COPY_TRANSFORMS', org)
class TweakChainRig(SimpleChainRig):
"""A rig that adds tweak controls to the triple chain."""
##############################
# BONES
class CtrlBones(SimpleChainRig.CtrlBones):
tweak: list[str] # Tweak control chain
class MchBones(SimpleChainRig.MchBones):
pass
bones: BaseRig.ToplevelBones[list[str], CtrlBones, MchBones, list[str]]
##############################
# Tweak chain
@stage.generate_bones
def make_tweak_chain(self):
orgs = self.bones.org
self.bones.ctrl.tweak = map_list(self.make_tweak_bone, count(0), orgs + orgs[-1:])
def make_tweak_bone(self, i: int, org: str):
name = self.copy_bone(org, 'tweak_' + strip_org(org), parent=False, scale=0.5)
if i == len(self.bones.org):
put_bone(self.obj, name, self.get_bone(org).tail)
return name
@stage.parent_bones
def parent_tweak_chain(self):
ctrl = self.bones.ctrl
for tweak, main in zip(ctrl.tweak, ctrl.fk + ctrl.fk[-1:]):
self.set_bone_parent(tweak, main)
@stage.configure_bones
def configure_tweak_chain(self):
for args in zip(count(0), self.bones.ctrl.tweak):
self.configure_tweak_bone(*args)
def configure_tweak_bone(self, i: int, tweak: str):
tweak_pb = self.get_bone(tweak)
tweak_pb.rotation_mode = 'ZXY'
if i == len(self.bones.org):
tweak_pb.lock_rotation_w = True
tweak_pb.lock_rotation = (True, True, True)
tweak_pb.lock_scale = (True, True, True)
else:
tweak_pb.lock_rotation_w = False
tweak_pb.lock_rotation = (True, False, True)
tweak_pb.lock_scale = (False, True, False)
@stage.generate_widgets
def make_tweak_widgets(self):
for tweak in self.bones.ctrl.tweak:
self.make_tweak_widget(tweak)
def make_tweak_widget(self, tweak: str):
create_sphere_widget(self.obj, tweak)
##############################
# ORG chain
@stage.rig_bones
def rig_org_chain(self):
tweaks = self.bones.ctrl.tweak
for args in zip(count(0), self.bones.org, tweaks, tweaks[1:]):
self.rig_org_bone(*args)
# noinspection PyMethodOverriding
def rig_org_bone(self, i: int, org: str, tweak: str, next_tweak: Optional[str]):
self.make_constraint(org, 'COPY_TRANSFORMS', tweak)
if next_tweak:
self.make_constraint(org, 'STRETCH_TO', next_tweak, keep_axis='SWING_Y')
class ConnectingChainRig(TweakChainRig):
"""Chain rig that can attach to an end of the parent, merging bbone chains."""
bbone_segments = 8
use_connect_reverse = None
use_connect_chain: bool
connected_tweak: Optional[str]
def initialize(self):
super().initialize()
self.use_connect_chain = self.params.connect_chain
self.connected_tweak = None
if self.use_connect_chain:
first_org = self.bones.org[0]
parent = self.rigify_parent
if not isinstance(parent, SimpleChainRig):
self.raise_error("Cannot connect to non-chain parent rig.")
parent_orgs = parent.bones.org
ok_reverse = is_same_position(self.obj, parent_orgs[0], first_org)
ok_direct = is_connected_position(self.obj, parent_orgs[-1], first_org)
if self.use_connect_reverse is None:
self.use_connect_reverse = ok_reverse and not ok_direct
if not (ok_reverse if self.use_connect_reverse else ok_direct):
self.raise_error("Cannot connect chain - bone position is disjoint.")
if isinstance(parent, ConnectingChainRig) and parent.use_connect_reverse:
self.raise_error("Cannot connect chain - parent is reversed.")
def prepare_bones(self):
# Exactly match bone position to parent
if self.use_connect_chain:
first_bone = self.get_bone(self.bones.org[0])
parent_orgs = self.rigify_parent.bones.org
if self.use_connect_reverse:
first_bone.head = self.get_bone(parent_orgs[0]).head
else:
first_bone.head = self.get_bone(parent_orgs[-1]).tail
def parent_bones(self):
# Use the parent of the shared tweak as the rig parent
root = self.connected_tweak or self.bones.org[0]
self.rig_parent_bone = self.get_bone_parent(root)
##############################
# Control chain
@stage.parent_bones
def parent_control_chain(self):
super().parent_control_chain()
self.set_bone_parent(self.bones.ctrl.fk[0], self.rig_parent_bone)
##############################
# Tweak chain
def check_connect_tweak(self, org: str):
""" Check if it is possible to share the last parent tweak control. """
assert self.connected_tweak is None
if self.use_connect_chain and isinstance(self.rigify_parent, TweakChainRig):
# Share the last tweak bone of the parent rig
parent_tweaks = self.rigify_parent.bones.ctrl.tweak
index = 0 if self.use_connect_reverse else -1
name = parent_tweaks[index]
if not is_same_position(self.obj, name, org):
self.raise_error("Cannot connect tweaks - position mismatch.")
if not self.use_connect_reverse:
copy_bone_position(self.obj, org, name, scale=0.5)
name = self.rename_bone(name, 'tweak_' + strip_org(org))
self.connected_tweak = parent_tweaks[index] = name
return name
else:
return None
def make_tweak_bone(self, i: int, org: str):
if i == 0 and self.check_connect_tweak(org):
return self.connected_tweak
else:
return super().make_tweak_bone(i, org)
@stage.parent_bones
def parent_tweak_chain(self):
ctrl = self.bones.ctrl
for i, tweak, main in zip(count(0), ctrl.tweak, ctrl.fk + ctrl.fk[-1:]):
if i > 0 or not (self.connected_tweak and self.use_connect_reverse):
self.set_bone_parent(tweak, main)
def configure_tweak_bone(self, i: int, tweak: str):
super().configure_tweak_bone(i, tweak)
if self.use_connect_chain and self.use_connect_reverse and i == len(self.bones.org):
tweak_pb = self.get_bone(tweak)
tweak_pb.lock_rotation_w = False
tweak_pb.lock_rotation = (True, False, True)
tweak_pb.lock_scale = (False, True, False)
##############################
# ORG chain
@stage.parent_bones
def parent_org_chain(self):
if self.use_connect_chain and self.use_connect_reverse:
flip_bone_chain(self.obj, self.bones.org)
for org, tweak in zip(self.bones.org, self.bones.ctrl.tweak[1:]):
self.set_bone_parent(org, tweak)
else:
self.set_bone_parent(self.bones.org[0], self.rig_parent_bone)
def rig_org_bone(self, i: int, org: str, tweak: str, next_tweak: Optional[str]):
if self.use_connect_chain and self.use_connect_reverse:
self.make_constraint(org, 'STRETCH_TO', tweak, keep_axis='SWING_Y')
else:
super().rig_org_bone(i, org, tweak, next_tweak)
##############################
# Deform chain
def make_deform_bone(self, i: int, org: str):
name = super().make_deform_bone(i, org)
if self.use_connect_chain and self.use_connect_reverse:
self.set_bone_parent(name, None)
flip_bone(self.obj, name)
return name
@stage.parent_bones
def parent_deform_chain(self):
if self.use_connect_chain:
deform = self.bones.deform
parent_deform = self.rigify_parent.bones.deform
if self.use_connect_reverse:
self.set_bone_parent(deform[-1], self.bones.org[-1])
self.parent_bone_chain(reversed(deform), use_connect=True)
connect_bbone_chain_handles(self.obj, [deform[0], parent_deform[0]])
return
else:
self.set_bone_parent(deform[0], parent_deform[-1], use_connect=True)
super().parent_deform_chain()
##############################
# Settings
@classmethod
def add_parameters(cls, params):
params.connect_chain = bpy.props.BoolProperty(
name='Connect chain',
default=False,
description='Connect the B-Bone chain to the parent rig'
)
@classmethod
def parameters_ui(cls, layout, params):
r = layout.row()
r.prop(params, "connect_chain")
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