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# SPDX-License-Identifier: GPL-2.0-or-later
import bpy
from typing import Optional, NamedTuple
from itertools import count
from ...utils.layers import ControlLayersOption
from ...utils.naming import make_derived_name
from ...utils.bones import align_bone_orientation, align_bone_to_axis, put_bone, set_bone_widget_transform
from ...utils.widgets_basic import create_cube_widget
from ...utils.switch_parent import SwitchParentBuilder
from ...utils.components import CustomPivotControl
from ...base_rig import stage
from ..chain_rigs import TweakChainRig, ConnectingChainRig
class BaseSpineRig(TweakChainRig):
"""
Spine rig with tweaks.
"""
bbone_segments = 8
min_chain_length = 3
use_torso_pivot: bool # Generate the custom pivot control
length: float # Total length of the chain bones
def initialize(self):
super().initialize()
self.use_torso_pivot = self.params.make_custom_pivot
self.length = sum([self.get_bone(b).length for b in self.bones.org])
####################################################
# BONES
class CtrlBones(TweakChainRig.CtrlBones):
master: str # Master control
master_pivot: str # Custom pivot under the master control (conditional)
class MchBones(TweakChainRig.MchBones):
master_pivot: str # Final output of the custom pivot (conditional)
bones: TweakChainRig.ToplevelBones[list[str], CtrlBones, MchBones, list[str]]
####################################################
# Master control bone
component_torso_pivot: Optional[CustomPivotControl]
@stage.generate_bones
def make_master_control(self):
self.bones.ctrl.master = name = self.make_master_control_bone(self.bones.org)
self.component_torso_pivot = self.build_master_pivot(name)
self.build_parent_switch(name)
def get_master_control_pos(self, orgs: list[str]):
return self.get_bone(orgs[0]).head
def make_master_control_bone(self, orgs: list[str]):
name = self.copy_bone(orgs[0], 'torso')
put_bone(self.obj, name, self.get_master_control_pos(orgs))
align_bone_to_axis(self.obj, name, 'y', length=self.length * 0.6)
return name
def build_master_pivot(self, master_name: str, **args):
if self.use_torso_pivot:
return CustomPivotControl(
self, 'master_pivot', master_name, parent=master_name, **args
)
def get_master_control_output(self):
if self.component_torso_pivot:
return self.component_torso_pivot.output
else:
return self.bones.ctrl.master
def build_parent_switch(self, master_name: str):
pbuilder = SwitchParentBuilder(self.generator)
org_parent = self.get_bone_parent(self.bones.org[0])
parents = [org_parent] if org_parent else []
pbuilder.register_parent(self, self.get_master_control_output, name='Torso', tags={'torso', 'child'})
pbuilder.build_child(
self, master_name, exclude_self=True,
extra_parents=parents, select_parent=org_parent,
prop_id='torso_parent', prop_name='Torso Parent',
controls=lambda: self.bones.flatten('ctrl'),
)
self.register_parent_bones(pbuilder)
def register_parent_bones(self, pbuilder: SwitchParentBuilder):
pbuilder.register_parent(self, self.bones.org[0], name='Hips', exclude_self=True, tags={'hips'})
pbuilder.register_parent(self, self.bones.org[-1], name='Chest', exclude_self=True, tags={'chest'})
@stage.parent_bones
def parent_master_control(self):
pass
@stage.configure_bones
def configure_master_control(self):
pass
@stage.generate_widgets
def make_master_control_widget(self):
master = self.bones.ctrl.master
set_bone_widget_transform(self.obj, master, self.get_master_control_output())
create_cube_widget(self.obj, master, radius=0.5)
####################################################
# ORG bones
@stage.parent_bones
def parent_org_chain(self):
ctrl = self.bones.ctrl
org = self.bones.org
for tweak, org in zip(ctrl.tweak, org):
self.set_bone_parent(org, tweak)
def rig_org_bone(self, i, org, tweak, next_tweak):
# For spine rigs, these constraints go on the deformation bones. See T74483#902192.
pass
####################################################
# Tweak bones
@stage.configure_bones
def configure_tweak_chain(self):
super().configure_tweak_chain()
ControlLayersOption.TWEAK.assign(self.params, self.obj, self.bones.ctrl.tweak)
####################################################
# Deform bones
@stage.rig_bones
def rig_deform_chain(self):
tweaks = self.bones.ctrl.tweak
for args in zip(count(0), self.bones.deform, tweaks, tweaks[1:]):
self.rig_deform_bone(*args)
# noinspection PyMethodOverriding
def rig_deform_bone(self, i: int, deform: str, tweak: str, next_tweak: Optional[str]):
self.make_constraint(deform, 'COPY_TRANSFORMS', tweak)
if next_tweak:
self.make_constraint(deform, 'STRETCH_TO', next_tweak, keep_axis='SWING_Y')
@stage.configure_bones
def configure_bbone_chain(self):
# noinspection SpellCheckingInspection
self.get_bone(self.bones.deform[0]).bone.bbone_easein = 0.0
####################################################
# SETTINGS
@classmethod
def add_parameters(cls, params):
params.make_custom_pivot = bpy.props.BoolProperty(
name="Custom Pivot Control",
default=False,
description="Create a rotation pivot control that can be repositioned arbitrarily"
)
# Setting up extra layers for the FK and tweak
ControlLayersOption.TWEAK.add_parameters(params)
@classmethod
def parameters_ui(cls, layout, params):
layout.prop(params, 'make_custom_pivot')
ControlLayersOption.TWEAK.parameters_ui(layout, params)
class BaseHeadTailRig(ConnectingChainRig):
""" Base for head and tail rigs. """
class RotationBone(NamedTuple):
org: str
name: str
bone: str
def_val: float # Default value of the follow slider
copy_scale: bool
rotation_bones: list[RotationBone]
follow_bone: str
default_prop_bone: str
prop_bone: str
def initialize(self):
super().initialize()
self.rotation_bones = []
####################################################
# Utilities
def get_parent_master(self, default_bone: str) -> str:
""" Return the parent's master control bone if connecting and found. """
if self.use_connect_chain and 'master' in self.rigify_parent.bones.ctrl:
return self.rigify_parent.bones.ctrl.master
else:
return default_bone
def get_parent_master_panel(self, default_bone: str):
""" Return the parent's master control bone if connecting and found, and script panel. """
controls = self.bones.ctrl.flatten()
prop_bone = self.get_parent_master(default_bone)
if prop_bone != default_bone:
owner = self.rigify_parent
controls += self.rigify_parent.bones.ctrl.flatten()
else:
owner = self
return prop_bone, self.script.panel_with_selected_check(owner, controls)
####################################################
# Rotation follow
def make_mch_follow_bone(self, org: str, name: str, def_val: float, *, copy_scale=False):
bone = self.copy_bone(org, make_derived_name('ROT-'+name, 'mch'), parent=True)
self.rotation_bones.append(self.RotationBone(org, name, bone, def_val, copy_scale))
return bone
@stage.parent_bones
def align_mch_follow_bones(self):
self.follow_bone = self.get_parent_master('root')
for org, name, bone, def_val, copy_scale in self.rotation_bones:
align_bone_orientation(self.obj, bone, self.follow_bone)
@stage.configure_bones
def configure_mch_follow_bones(self):
self.prop_bone, panel = self.get_parent_master_panel(self.default_prop_bone)
for org, name, bone, def_val, copy_scale in self.rotation_bones:
text_name = name.replace('_', ' ').title() + ' Follow'
self.make_property(self.prop_bone, name+'_follow', default=float(def_val))
panel.custom_prop(self.prop_bone, name+'_follow', text=text_name, slider=True)
@stage.rig_bones
def rig_mch_follow_bones(self):
for org, name, bone, def_val, copy_scale in self.rotation_bones:
self.rig_mch_rotation_bone(bone, name+'_follow', copy_scale)
def rig_mch_rotation_bone(self, mch: str, prop_name: str, copy_scale: bool):
con = self.make_constraint(mch, 'COPY_ROTATION', self.follow_bone)
self.make_driver(con, 'influence',
variables=[(self.prop_bone, prop_name)], polynomial=[1, -1])
if copy_scale:
self.make_constraint(mch, 'COPY_SCALE', self.follow_bone)
####################################################
# Tweak chain
@stage.configure_bones
def configure_tweak_chain(self):
super().configure_tweak_chain()
ControlLayersOption.TWEAK.assign(self.params, self.obj, self.bones.ctrl.tweak)
####################################################
# Settings
@classmethod
def add_parameters(cls, params):
super().add_parameters(params)
# Setting up extra layers for the FK and tweak
ControlLayersOption.TWEAK.add_parameters(params)
@classmethod
def parameters_ui(cls, layout, params):
super().parameters_ui(layout, params)
ControlLayersOption.TWEAK.parameters_ui(layout, params)
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