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constraints.py
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constraints.py
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from itertools import product
import bpy
from .util import unique_constraint, get_pose_bone
ik_config = {
'LowerArm_L': {
'chain_count': 2,
'lock_ik_y': True,
'lock_ik_x': True,
'use_ik_limit_z': True,
'ik_max_z': 0,
'ik_min_z': -2.61799
},
'LowerArm_R': {
'chain_count': 2,
'lock_ik_y': True,
'lock_ik_x': True,
'use_ik_limit_z': True,
'ik_max_z': 2.61799,
'ik_min_z': 0
},
'LowerLeg_L': {
'chain_count': 2,
'lock_ik_y': True,
'lock_ik_z': True,
'use_ik_limit_x': True,
'ik_max_x': 0,
'ik_min_x': -2.61799
},
'LowerLeg_R': {
'chain_count': 2,
'lock_ik_y': True,
'lock_ik_z': True,
'use_ik_limit_x': True,
'ik_max_x': 0,
'ik_min_x': -2.61799
}
}
rotation_limits = {
'UpperLeg_L': {
'min_x': -0.698132,
'max_x': 1.91986,
'min_y': -0.436332,
'max_y': 0.436332,
'min_z': -0.785398,
'max_z': 1.39626
},
'UpperLeg_R': {
'min_x': -0.698132,
'max_x': 1.91986,
'min_y': -0.436332,
'max_y': 0.436332,
'min_z': -0.785398,
'max_z': 1.39626
},
'UpperArm_L': {
'min_x': -2.0944,
'max_x': 0.436332,
'min_y': -0.872665,
'max_y': 0.872665,
'min_z': -2.26893,
'max_z': 1.5708
},
'UpperArm_R': {
'min_x': -2.0944,
'max_x': 0.436332,
'min_y': -0.872665,
'max_y': 0.872665,
'min_z': -1.5708,
'max_z': 2.26893
},
'Spine': {
'min_x': -0.523599,
'max_x': 0.523599,
'min_y': -0.523599,
'max_y': 0.523599,
'min_z': -0.523599,
'max_z': 0.523599
},
'Chest': {
'min_x': -0.2617995,
'max_x': 0.2617995,
'min_y': -0.2617995,
'max_y': 0.2617995,
'min_z': -0.2617995,
'max_z': 0.2617995
},
'UpperChest': {
'min_x': -0.174533,
'max_x': 0.174533,
'min_y': -0.174533,
'max_y': 0.174533,
'min_z': -0.174533,
'max_z': 0.174533
},
'Neck': {
'min_x': -0.523599,
'max_x': 0.523599,
'min_y': -0.523599,
'max_y': 0.523599,
'min_z': -0.523599,
'max_z': 0.523599
},
'Head': {
'min_x': -0.523599,
'max_x': 0.523599,
'min_y': -0.523599,
'max_y': 0.523599,
'min_z': -0.523599,
'max_z': 0.523599
},
'<fingers>':{
'min_x': -1.5708,
'max_x': 0.139626,
'min_y': 0,
'max_y': 0,
'min_z': -0.349066,
'max_z': 0.349066
},
'Thumb1_L':{
'min_x': -0.994838,
'max_x': 0.349066,
'min_y': 0,
'max_y': 0,
'min_z': -0.349066,
'max_z': 0.523599
},
'Thumb1_R':{
'min_x': -0.994838,
'max_x': 0.349066,
'min_y': 0,
'max_y': 0,
'min_z': -0.523599,
'max_z': 0.349066
},
'Shoulder_L':{
'min_x': -0.349066,
'max_x': 0.349066,
'min_y': -0.0872665,
'max_y': 0.349066,
'min_z': -0.349066,
'max_z': 0.349066
},
'Shoulder_R':{
'min_x': -0.349066,
'max_x': 0.349066,
'min_y': -0.349066,
'max_y': 0.0872665,
'min_z': -0.349066,
'max_z': 0.349066
},
'Foot_L':{
'min_x': -0.837758,
'max_x': 0.645772,
'min_y': -0.0523599,
'max_y': 0.0523599,
'min_z': -0.261799,
'max_z': 0.261799
},
'Foot_R':{
'min_x': -0.837758,
'max_x': 0.645772,
'min_y': -0.0523599,
'max_y': 0.0523599,
'min_z': -0.261799,
'max_z': 0.261799
}
}
fingers = [
'Thumb',
'Index',
'Middle',
'Ring',
'Little'
]
def apply_edit_bones():
bpy.ops.object.posemode_toggle() # This lines needed to "apply" bones from edit mode
bpy.ops.object.editmode_toggle() # or else constraints won't appear for some reason
def setup_ik():
apply_edit_bones()
pose_bones = bpy.context.object.pose.bones
for bone_name, params in ik_config.items():
bone = get_pose_bone(bone_name)
if bone is None: continue
constraint = unique_constraint(bone, 'IK')
constraint.chain_count = params.get('chain_count', 0)
bone.lock_ik_x = params.get('lock_ik_x', False)
bone.lock_ik_y = params.get('lock_ik_y', False)
bone.lock_ik_z = params.get('lock_ik_z', False)
bone.use_ik_limit_x = params.get('use_ik_limit_x', False)
bone.use_ik_limit_y = params.get('use_ik_limit_y', False)
bone.use_ik_limit_z = params.get('use_ik_limit_z', False)
bone.ik_max_x = params.get('ik_max_x', 3.14159)
bone.ik_min_x = params.get('ik_min_x', -3.14159)
bone.ik_max_y = params.get('ik_max_y', 3.14159)
bone.ik_min_y = params.get('ik_min_y', -3.14159)
bone.ik_max_z = params.get('ik_max_z', 3.14159)
bone.ik_min_z = params.get('ik_min_z', -3.14159)
def add_finger_constraitns():
apply_edit_bones()
for finger, num, side in product(fingers, [2, 3], ['L', 'R']):
bone = get_pose_bone(f'{finger}{num}_{side}')
if bone is None: continue
constraint = unique_constraint(bone, 'COPY_ROTATION')
constraint.target = bpy.context.object
constraint.subtarget = bone.parent.name
constraint.mix_mode = 'ADD'
constraint.target_space = 'LOCAL'
constraint.owner_space = 'LOCAL'
constraint.use_y = False
if finger == 'Thumb':
constraint.use_x = False
else:
constraint.use_z = False
def add_rotation_limits():
apply_edit_bones()
for bone_name, params in rotation_limits.items():
if bone_name == '<fingers>':
for finger, num, side in product(fingers, [1], ['L', 'R']):
if finger == 'Thumb': continue
bone = get_pose_bone(f'{finger}{num}_{side}')
if bone is None: continue
constraint = unique_constraint(bone, 'LIMIT_ROTATION')
constraint.owner_space = 'LOCAL'
constraint.use_transform_limit = True
for p_name, p_value in params.items():
setattr(constraint, p_name, p_value)
axis = p_name.split('_')[1]
setattr(constraint, f'use_limit_{axis}', True)
bone = get_pose_bone(bone_name)
if bone is None: continue
constraint = unique_constraint(bone, 'LIMIT_ROTATION')
constraint.owner_space = 'LOCAL'
constraint.use_transform_limit = True
for p_name, p_value in params.items():
setattr(constraint, p_name, p_value)
axis = p_name.split('_')[1]
setattr(constraint, f'use_limit_{axis}', True)