272 lines
9.6 KiB
Python
272 lines
9.6 KiB
Python
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# SPDX-License-Identifier: GPL-2.0-or-later
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import bpy
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from ...utils.bones import align_bone_roll, put_bone, copy_bone_position, flip_bone
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from ...utils.naming import make_derived_name
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from ...utils.misc import map_list
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from itertools import count
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from ...base_rig import stage
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from .limb_rigs import BaseLimbRig
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from .paw import Rig as pawRig
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class Rig(pawRig):
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"""Front paw rig with special IK automation."""
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####################################################
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# EXTRA BONES
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#
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# mch:
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# ik2_chain[2]
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# Second IK system (pre-driving heel)
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# heel_track
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# Bone tracking IK2 to rotate heel
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# heel_parent
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# Parent of the heel control
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#
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####################################################
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####################################################
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# IK controls
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def get_middle_ik_controls(self):
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return [self.bones.ctrl.heel]
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def get_ik_fk_position_chains(self):
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ik_chain, tail_chain, fk_chain = super().get_ik_fk_position_chains()
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assert not tail_chain
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if not self.use_heel2:
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return [*ik_chain, ik_chain[-1]], [], [*fk_chain, fk_chain[-1]]
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return ik_chain, tail_chain, fk_chain
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def get_extra_ik_controls(self):
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extra = [self.bones.ctrl.heel2] if self.use_heel2 else []
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return BaseLimbRig.get_extra_ik_controls(self) + extra
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def get_ik_pole_parents(self):
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return [(self.get_ik2_target_bone(), self.bones.ctrl.ik)]
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####################################################
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# Second IK system (pre-driving heel)
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use_mch_ik_base = True
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def get_ik2_target_bone(self):
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return self.bones.mch.ik2_target if self.use_heel2 else self.bones.mch.toe_socket
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@stage.generate_bones
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def make_ik2_mch_chain(self):
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orgs = self.bones.org.main
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chain = map_list(self.make_ik2_mch_bone, count(0), orgs[0:2])
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self.bones.mch.ik2_chain = chain
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if self.use_heel2:
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self.bones.mch.ik2_target = self.make_ik2_mch_target_bone(orgs)
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# Connect the chain end to the target
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self.get_bone(chain[1]).tail = self.get_bone(orgs[2]).tail
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align_bone_roll(self.obj, chain[1], orgs[1])
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def make_ik2_mch_target_bone(self, orgs):
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return self.copy_bone(orgs[3], make_derived_name(orgs[0], 'mch', '_ik2_target'), scale=1/2)
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def make_ik2_mch_bone(self, i, org):
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return self.copy_bone(org, make_derived_name(org, 'mch', '_ik2'))
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@stage.parent_bones
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def parent_ik2_mch_chain(self):
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mch = self.bones.mch
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if self.use_heel2:
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self.set_bone_parent(mch.ik2_target, self.bones.ctrl.heel2)
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self.set_bone_parent(mch.ik2_chain[0], self.bones.ctrl.ik_base, inherit_scale='AVERAGE')
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self.parent_bone_chain(mch.ik2_chain, use_connect=True)
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@stage.configure_bones
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def configure_ik2_mch_chain(self):
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for i, mch in enumerate(self.bones.mch.ik2_chain):
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self.configure_ik2_mch_bone(i, mch)
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def configure_ik2_mch_bone(self, i, mch):
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bone = self.get_bone(mch)
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bone.ik_stretch = 0.1
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if i == 1:
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bone.lock_ik_x = bone.lock_ik_y = bone.lock_ik_z = True
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setattr(bone, 'lock_ik_' + self.main_axis, False)
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@stage.rig_bones
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def rig_ik2_mch_chain(self):
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target_bone = self.get_ik2_target_bone()
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self.rig_ik_mch_end_bone(self.bones.mch.ik2_chain[-1], target_bone, self.bones.ctrl.ik_pole)
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####################################################
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# Heel tracking from IK2
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@stage.generate_bones
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def make_heel_track_bones(self):
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orgs = self.bones.org.main
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mch = self.bones.mch
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mch.heel_track = self.copy_bone(orgs[2], make_derived_name(orgs[2], 'mch', '_track'))
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mch.heel_parent = self.copy_bone(orgs[2], make_derived_name(orgs[2], 'mch', '_parent'))
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# This two bone setup is used to move the damped track singularity out
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# of the way to a forbidden zone of the rig, and thus avoid flipping.
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# The bones are aligned to the center of the valid transformation zone.
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self.align_ik_control_bone(mch.heel_track)
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put_bone(self.obj, mch.heel_track, self.get_bone(orgs[2]).tail, scale=1/3)
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copy_bone_position(self.obj, mch.heel_track, mch.heel_parent, scale=3/4)
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@stage.parent_bones
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def parent_heel_control_bone(self):
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self.set_bone_parent(self.bones.ctrl.heel, self.bones.mch.heel_parent)
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@stage.parent_bones
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def parent_heel_track_bones(self):
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# Parenting heel_parent deferred to apply_bones.
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self.set_bone_parent(self.bones.mch.heel_track, self.get_ik2_target_bone())
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@stage.configure_bones
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def prerig_heel_track_bones(self):
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# Assign the constraint before the apply stage.
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self.make_constraint(
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self.bones.mch.heel_track, 'DAMPED_TRACK', self.bones.mch.ik2_chain[1],
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influence=self.params.front_paw_heel_influence
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)
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@stage.preapply_bones
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def preapply_heel_track_bones(self):
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# Assign local transform negating the effect of the constraint at rest.
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track_bone = self.get_bone(self.bones.mch.heel_track)
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bone = self.get_bone(self.bones.mch.heel_parent)
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bone.matrix_basis = track_bone.matrix.inverted() @ bone.matrix
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@stage.apply_bones
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def apply_heel_track_bones(self):
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# Complete the parent chain.
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self.set_bone_parent(self.bones.mch.heel_parent, self.bones.mch.heel_track)
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####################################################
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# Settings
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@classmethod
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def add_parameters(self, params):
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super().add_parameters(params)
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params.front_paw_heel_influence = bpy.props.FloatProperty(
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name = 'Heel IK Influence',
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default = 0.8,
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min = 0,
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max = 1,
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description = 'Influence of the secondary IK on the heel control rotation'
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)
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@classmethod
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def parameters_ui(self, layout, params):
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r = layout.row()
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r.prop(params, "front_paw_heel_influence", slider=True)
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super().parameters_ui(layout, params)
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def create_sample(obj):
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# generated by rigify.utils.write_metarig
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bpy.ops.object.mode_set(mode='EDIT')
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arm = obj.data
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bones = {}
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bone = arm.edit_bones.new('front_thigh.L')
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bone.head = 0.0000, 0.0000, 0.6902
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bone.tail = 0.0000, 0.0916, 0.4418
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bone.roll = 0.0000
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bone.use_connect = False
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bones['front_thigh.L'] = bone.name
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bone = arm.edit_bones.new('front_shin.L')
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bone.head = 0.0000, 0.0916, 0.4418
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bone.tail = 0.0000, 0.1014, 0.1698
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bone.roll = 0.0000
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bone.use_connect = True
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bone.parent = arm.edit_bones[bones['front_thigh.L']]
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bones['front_shin.L'] = bone.name
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bone = arm.edit_bones.new('front_foot.L')
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bone.head = 0.0000, 0.1014, 0.1698
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bone.tail = 0.0000, 0.0699, 0.0411
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bone.roll = 0.0000
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bone.use_connect = True
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bone.parent = arm.edit_bones[bones['front_shin.L']]
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bones['front_foot.L'] = bone.name
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bone = arm.edit_bones.new('front_toe.L')
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bone.head = 0.0000, 0.0699, 0.0411
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bone.tail = 0.0000, -0.0540, 0.0000
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bone.roll = 3.1416
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bone.use_connect = True
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bone.parent = arm.edit_bones[bones['front_foot.L']]
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bones['front_toe.L'] = bone.name
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bpy.ops.object.mode_set(mode='OBJECT')
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pbone = obj.pose.bones[bones['front_thigh.L']]
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pbone.rigify_type = 'limbs.front_paw'
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pbone.lock_location = (False, False, False)
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pbone.lock_rotation = (False, False, False)
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pbone.lock_rotation_w = False
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pbone.lock_scale = (False, False, False)
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pbone.rotation_mode = 'QUATERNION'
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try:
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pbone.rigify_parameters.limb_type = "paw"
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except AttributeError:
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pass
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try:
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pbone.rigify_parameters.fk_layers = [False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False]
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except AttributeError:
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pass
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try:
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pbone.rigify_parameters.tweak_layers = [False, False, False, False, False, False, False, False, False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False]
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except AttributeError:
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pass
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pbone = obj.pose.bones[bones['front_shin.L']]
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pbone.rigify_type = ''
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pbone.lock_location = (False, False, False)
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pbone.lock_rotation = (False, False, False)
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pbone.lock_rotation_w = False
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pbone.lock_scale = (False, False, False)
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pbone.rotation_mode = 'QUATERNION'
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pbone = obj.pose.bones[bones['front_foot.L']]
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pbone.rigify_type = ''
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pbone.lock_location = (False, False, False)
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pbone.lock_rotation = (False, False, False)
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pbone.lock_rotation_w = False
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pbone.lock_scale = (False, False, False)
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pbone.rotation_mode = 'QUATERNION'
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pbone = obj.pose.bones[bones['front_toe.L']]
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pbone.rigify_type = ''
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pbone.lock_location = (False, False, False)
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pbone.lock_rotation = (False, False, False)
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pbone.lock_rotation_w = False
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pbone.lock_scale = (False, False, False)
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pbone.rotation_mode = 'QUATERNION'
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try:
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pbone.rigify_parameters.limb_type = "paw"
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except AttributeError:
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pass
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bpy.ops.object.mode_set(mode='EDIT')
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for bone in arm.edit_bones:
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bone.select = False
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bone.select_head = False
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bone.select_tail = False
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for b in bones:
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bone = arm.edit_bones[bones[b]]
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bone.select = True
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bone.select_head = True
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bone.select_tail = True
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bone.bbone_x = bone.bbone_z = bone.length * 0.05
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arm.edit_bones.active = bone
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return bones
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