forked from bartvdbraak/blender
498 lines
16 KiB
Python
498 lines
16 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
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import bpy
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from rna_prop_ui import rna_idprop_ui_prop_get
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from math import pi
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from rigify import RigifyError
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from rigify_utils import bone_class_instance, copy_bone_simple, get_side_name, get_base_name
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from Mathutils import Vector
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METARIG_NAMES = "hips", "thigh", "shin", "foot", "toe"
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def metarig_template():
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# generated by rigify.write_meta_rig
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bpy.ops.object.mode_set(mode='EDIT')
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obj = bpy.context.active_object
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arm = obj.data
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bone = arm.edit_bones.new('body')
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bone.head[:] = -0.0728, -0.2427, 0.0000
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bone.tail[:] = -0.0728, -0.2427, 0.2427
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bone.roll = 0.0000
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bone.connected = False
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bone = arm.edit_bones.new('thigh')
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bone.head[:] = 0.0000, 0.0000, -0.0000
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bone.tail[:] = 0.0813, -0.2109, -0.3374
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bone.roll = -0.4656
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bone.connected = False
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bone.parent = arm.edit_bones['body']
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bone = arm.edit_bones.new('shin')
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bone.head[:] = 0.0813, -0.2109, -0.3374
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bone.tail[:] = 0.0714, -0.0043, -0.5830
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bone.roll = -0.2024
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bone.connected = True
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bone.parent = arm.edit_bones['thigh']
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bone = arm.edit_bones.new('foot')
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bone.head[:] = 0.0714, -0.0043, -0.5830
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bone.tail[:] = 0.0929, -0.0484, -0.7652
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bone.roll = -0.3766
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bone.connected = True
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bone.parent = arm.edit_bones['shin']
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bone = arm.edit_bones.new('toe')
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bone.head[:] = 0.0929, -0.0484, -0.7652
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bone.tail[:] = 0.1146, -0.1244, -0.7652
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bone.roll = -0.0000
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bone.connected = True
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bone.parent = arm.edit_bones['foot']
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bpy.ops.object.mode_set(mode='OBJECT')
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pbone = obj.pose.bones['thigh']
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pbone['type'] = 'leg_quadruped'
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def metarig_definition(obj, orig_bone_name):
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'''
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The bone given is the first in a chain
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Expects a chain of at least 3 children.
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eg.
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thigh -> shin -> foot -> [toe, heel]
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'''
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bone_definition = []
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orig_bone = obj.data.bones[orig_bone_name]
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orig_bone_parent = orig_bone.parent
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if orig_bone_parent is None:
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raise RigifyError("expected the thigh bone to have a parent hip bone")
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bone_definition.append(orig_bone_parent.name)
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bone_definition.append(orig_bone.name)
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bone = orig_bone
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chain = 0
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while chain < 3: # first 2 bones only have 1 child
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children = bone.children
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if len(children) != 1:
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raise RigifyError("expected the thigh bone to have 3 children without a fork")
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bone = children[0]
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bone_definition.append(bone.name) # shin, foot
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chain += 1
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if len(bone_definition) != len(METARIG_NAMES):
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raise RigifyError("internal problem, expected %d bones" % len(METARIG_NAMES))
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return bone_definition
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def ik(obj, bone_definition, base_names, options):
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eb = obj.data.edit_bones
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pb = obj.pose.bones
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arm = obj.data
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bpy.ops.object.mode_set(mode='EDIT')
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# setup the existing bones, use names from METARIG_NAMES
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mt = bone_class_instance(obj, ["hips"])
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mt_chain = bone_class_instance(obj, ["thigh", "shin", "foot", "toe"])
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mt.attr_initialize(METARIG_NAMES, bone_definition)
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mt_chain.attr_initialize(METARIG_NAMES, bone_definition)
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ik_chain = mt_chain.copy(to_fmt="MCH-%s.ik", base_names=base_names)
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ik_chain.thigh_e.connected = False
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ik_chain.thigh_e.parent = mt.hips_e
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ik_chain.foot_e.parent = None
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ik_chain.rename("foot", get_base_name(base_names[bone_definition[3]]) + "_ik" + get_side_name(base_names[bone_definition[3]]))
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ik_chain.rename("toe", get_base_name(base_names[bone_definition[4]]) + "_ik" + get_side_name(base_names[bone_definition[4]]))
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# keep the foot_ik as the parent
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ik_chain.toe_e.connected = False
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# Foot uses pose space, not local space, for translation
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ik_chain.foot_e.local_location = False
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# must be after disconnecting the toe
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ik_chain.foot_e.align_orientation(mt_chain.toe_e)
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# children of ik_foot
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ik = bone_class_instance(obj, ["foot_roll", "foot_roll_01", "foot_roll_02", "foot_target"])
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# knee rotator
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knee_rotator = copy_bone_simple(arm, mt_chain.toe, "knee_rotator" + get_side_name(base_names[mt_chain.foot]), parent=True).name
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eb[knee_rotator].connected = False
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eb[knee_rotator].parent = eb[mt.hips]
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eb[knee_rotator].head = eb[ik_chain.thigh].head
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eb[knee_rotator].tail = eb[knee_rotator].head + eb[mt_chain.toe].vector
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eb[knee_rotator].length = eb[ik_chain.thigh].length / 2
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eb[knee_rotator].roll += pi/2
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# parent ik leg to the knee rotator
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eb[ik_chain.thigh].parent = eb[knee_rotator]
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# foot roll is an interesting one!
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# plot a vector from the toe bones head, bactwards to the length of the foot
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# then align it with the foot but reverse direction.
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ik.foot_roll_e = copy_bone_simple(arm, mt_chain.toe, get_base_name(base_names[mt_chain.foot]) + "_roll" + get_side_name(base_names[mt_chain.foot]))
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ik.foot_roll = ik.foot_roll_e.name
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ik.foot_roll_e.connected = False
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ik.foot_roll_e.parent = ik_chain.foot_e
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ik.foot_roll_e.head -= mt_chain.toe_e.vector.normalize() * mt_chain.foot_e.length
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ik.foot_roll_e.tail = ik.foot_roll_e.head - (mt_chain.foot_e.vector.normalize() * mt_chain.toe_e.length)
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ik.foot_roll_e.align_roll(mt_chain.foot_e.matrix.rotation_part() * Vector(0.0, 0.0, -1.0))
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# MCH-foot
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ik.foot_roll_01_e = copy_bone_simple(arm, mt_chain.foot, "MCH-" + base_names[mt_chain.foot])
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ik.foot_roll_01 = ik.foot_roll_01_e.name
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ik.foot_roll_01_e.parent = ik_chain.foot_e
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ik.foot_roll_01_e.head, ik.foot_roll_01_e.tail = mt_chain.foot_e.tail, mt_chain.foot_e.head
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ik.foot_roll_01_e.roll = ik.foot_roll_e.roll
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# ik_target, child of MCH-foot
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ik.foot_target_e = copy_bone_simple(arm, mt_chain.foot, "MCH-" + base_names[mt_chain.foot] + "_ik_target")
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ik.foot_target = ik.foot_target_e.name
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ik.foot_target_e.parent = ik.foot_roll_01_e
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ik.foot_target_e.align_orientation(ik_chain.foot_e)
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ik.foot_target_e.length = ik_chain.foot_e.length / 2.0
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ik.foot_target_e.connected = True
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# MCH-foot.02 child of MCH-foot
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ik.foot_roll_02_e = copy_bone_simple(arm, mt_chain.foot, "MCH-%s_02" % base_names[mt_chain.foot])
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ik.foot_roll_02 = ik.foot_roll_02_e.name
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ik.foot_roll_02_e.parent = ik.foot_roll_01_e
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bpy.ops.object.mode_set(mode='OBJECT')
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mt.update()
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mt_chain.update()
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ik.update()
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ik_chain.update()
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# Set rotation modes and axis locks
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#pb[knee_rotator].rotation_mode = 'YXZ'
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#pb[knee_rotator].lock_rotation = False, True, False
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pb[knee_rotator].lock_location = True, True, True
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pb[ik.foot_roll].rotation_mode = 'XYZ'
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pb[ik.foot_roll].lock_rotation = False, True, True
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pb[ik_chain.toe].rotation_mode = 'XYZ'
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pb[ik_chain.toe].lock_rotation = False, True, True
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# IK switch property
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prop = rna_idprop_ui_prop_get(pb[ik_chain.foot], "ik", create=True)
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pb[ik_chain.foot]["ik"] = 1.0
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prop["soft_min"] = 0.0
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prop["soft_max"] = 1.0
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prop["min"] = 0.0
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prop["max"] = 1.0
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ik_driver_path = pb[ik_chain.foot].path_from_id() + '["ik"]'
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# simple constraining of orig bones
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con = mt_chain.thigh_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = ik_chain.thigh
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fcurve = con.driver_add("influence", 0)
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driver = fcurve.driver
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var = driver.variables.new()
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driver.type = 'AVERAGE'
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var.name = "var"
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var.targets[0].id_type = 'OBJECT'
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var.targets[0].id = obj
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var.targets[0].data_path = ik_driver_path
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con = mt_chain.shin_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = ik_chain.shin
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fcurve = con.driver_add("influence", 0)
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driver = fcurve.driver
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var = driver.variables.new()
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driver.type = 'AVERAGE'
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var.name = "var"
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var.targets[0].id_type = 'OBJECT'
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var.targets[0].id = obj
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var.targets[0].data_path = ik_driver_path
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con = mt_chain.foot_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = ik.foot_roll_02
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fcurve = con.driver_add("influence", 0)
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driver = fcurve.driver
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var = driver.variables.new()
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driver.type = 'AVERAGE'
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var.name = "var"
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var.targets[0].id_type = 'OBJECT'
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var.targets[0].id = obj
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var.targets[0].data_path = ik_driver_path
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con = mt_chain.toe_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = ik_chain.toe
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fcurve = con.driver_add("influence", 0)
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driver = fcurve.driver
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var = driver.variables.new()
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driver.type = 'AVERAGE'
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var.name = "var"
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var.targets[0].id_type = 'OBJECT'
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var.targets[0].id = obj
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var.targets[0].data_path = ik_driver_path
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# others...
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con = ik.foot_roll_01_p.constraints.new('COPY_ROTATION')
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con.target = obj
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con.subtarget = ik.foot_roll
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con.target_space = 'LOCAL'
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con.owner_space = 'LOCAL'
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# IK
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con = ik_chain.shin_p.constraints.new('IK')
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con.chain_length = 2
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con.iterations = 500
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con.pole_angle = -90.0 # XXX - in deg!
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con.use_tail = True
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con.use_stretch = True
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con.use_target = True
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con.use_rotation = False
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con.weight = 1.0
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con.target = obj
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con.subtarget = ik.foot_target
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con.pole_target = None
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ik.update()
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ik_chain.update()
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# Set layers of the bones.
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if "ik_layer" in options:
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layer = [n==options["ik_layer"] for n in range(0,32)]
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else:
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layer = list(mt_chain.thigh_b.layer)
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for attr in ik_chain.attr_names:
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obj.data.bones[getattr(ik_chain, attr)].layer = layer
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for attr in ik.attr_names:
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obj.data.bones[getattr(ik, attr)].layer = layer
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obj.data.bones[knee_rotator].layer = layer
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return None, ik_chain.thigh, ik_chain.shin, ik_chain.foot, ik_chain.toe
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def fk(obj, bone_definition, base_names, options):
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eb = obj.data.edit_bones
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pb = obj.pose.bones
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arm = obj.data
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bpy.ops.object.mode_set(mode='EDIT')
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# setup the existing bones, use names from METARIG_NAMES
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mt = bone_class_instance(obj, ["hips"])
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mt_chain = bone_class_instance(obj, ["thigh", "shin", "foot", "toe"])
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mt.attr_initialize(METARIG_NAMES, bone_definition)
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mt_chain.attr_initialize(METARIG_NAMES, bone_definition)
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fk_chain = mt_chain.copy(to_fmt="%s", base_names=base_names)
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# Create the socket
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socket = copy_bone_simple(arm, mt_chain.thigh, "MCH-leg_socket").name
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eb[socket].parent = eb[mt.hips]
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eb[socket].length = eb[mt_chain.thigh].length / 4
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# Create the hinge
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hinge = copy_bone_simple(arm, mt.hips, "MCH-leg_hinge").name
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eb[hinge].length = eb[mt.hips].length / 2
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# Make leg child of hinge
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eb[fk_chain.thigh].connected = False
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eb[fk_chain.thigh].parent = eb[hinge]
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bpy.ops.object.mode_set(mode='OBJECT')
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# Set rotation modes and axis locks
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pb[fk_chain.shin].rotation_mode = 'XYZ'
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pb[fk_chain.shin].lock_rotation = False, True, True
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# Constrain original bones to control bones
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con = mt_chain.thigh_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = fk_chain.thigh
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con = mt_chain.shin_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = fk_chain.shin
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con = mt_chain.foot_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = fk_chain.foot
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con = mt_chain.toe_p.constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = fk_chain.toe
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# Socket constraint
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con = pb[fk_chain.thigh].constraints.new('COPY_LOCATION')
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con.target = obj
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con.subtarget = socket
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# Hinge constraint
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con = pb[hinge].constraints.new('COPY_TRANSFORMS')
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con.target = obj
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con.subtarget = mt.hips
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prop = rna_idprop_ui_prop_get(pb[fk_chain.thigh], "hinge", create=True)
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pb[fk_chain.thigh]["hinge"] = 0.0
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prop["soft_min"] = 0.0
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prop["soft_max"] = 1.0
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prop["min"] = 0.0
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prop["max"] = 1.0
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hinge_driver_path = pb[fk_chain.thigh].path_from_id() + '["hinge"]'
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fcurve = con.driver_add("influence", 0)
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driver = fcurve.driver
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var = driver.variables.new()
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driver.type = 'AVERAGE'
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var.name = "var"
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var.targets[0].id_type = 'OBJECT'
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var.targets[0].id = obj
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var.targets[0].data_path = hinge_driver_path
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mod = fcurve.modifiers[0]
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mod.poly_order = 1
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mod.coefficients[0] = 1.0
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mod.coefficients[1] = -1.0
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return None, fk_chain.thigh, fk_chain.shin, fk_chain.foot, fk_chain.toe
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def deform(obj, definitions, base_names, options):
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bpy.ops.object.mode_set(mode='EDIT')
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# Create upper leg bones: two bones, each half of the upper leg.
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uleg1 = copy_bone_simple(obj.data, definitions[1], "DEF-%s.01" % base_names[definitions[1]], parent=True)
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uleg2 = copy_bone_simple(obj.data, definitions[1], "DEF-%s.02" % base_names[definitions[1]], parent=True)
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uleg1.connected = False
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uleg2.connected = False
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uleg2.parent = uleg1
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center = uleg1.center
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uleg1.tail = center
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uleg2.head = center
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# Create lower leg bones: two bones, each half of the lower leg.
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lleg1 = copy_bone_simple(obj.data, definitions[2], "DEF-%s.01" % base_names[definitions[2]], parent=True)
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lleg2 = copy_bone_simple(obj.data, definitions[2], "DEF-%s.02" % base_names[definitions[2]], parent=True)
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lleg1.connected = False
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lleg2.connected = False
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lleg2.parent = lleg1
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center = lleg1.center
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lleg1.tail = center
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lleg2.head = center
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# Create a bone for the second lower leg deform bone to twist with
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twist = copy_bone_simple(obj.data, lleg2.name, "MCH-leg_twist")
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twist.length /= 4
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twist.connected = False
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twist.parent = obj.data.edit_bones[definitions[3]]
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# Create foot bone
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foot = copy_bone_simple(obj.data, definitions[3], "DEF-%s" % base_names[definitions[3]], parent=True)
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# Create toe bone
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toe = copy_bone_simple(obj.data, definitions[4], "DEF-%s" % base_names[definitions[4]], parent=True)
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# Store names before leaving edit mode
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uleg1_name = uleg1.name
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uleg2_name = uleg2.name
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lleg1_name = lleg1.name
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lleg2_name = lleg2.name
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twist_name = twist.name
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foot_name = foot.name
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toe_name = toe.name
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# Leave edit mode
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bpy.ops.object.mode_set(mode='OBJECT')
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# Get the pose bones
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uleg1 = obj.pose.bones[uleg1_name]
|
|
uleg2 = obj.pose.bones[uleg2_name]
|
|
lleg1 = obj.pose.bones[lleg1_name]
|
|
lleg2 = obj.pose.bones[lleg2_name]
|
|
foot = obj.pose.bones[foot_name]
|
|
toe = obj.pose.bones[toe_name]
|
|
|
|
# Upper leg constraints
|
|
con = uleg1.constraints.new('DAMPED_TRACK')
|
|
con.name = "trackto"
|
|
con.target = obj
|
|
con.subtarget = definitions[2]
|
|
|
|
con = uleg2.constraints.new('COPY_ROTATION')
|
|
con.name = "copy_rot"
|
|
con.target = obj
|
|
con.subtarget = definitions[1]
|
|
|
|
# Lower leg constraints
|
|
con = lleg1.constraints.new('COPY_ROTATION')
|
|
con.name = "copy_rot"
|
|
con.target = obj
|
|
con.subtarget = definitions[2]
|
|
|
|
con = lleg2.constraints.new('COPY_ROTATION')
|
|
con.name = "copy_rot"
|
|
con.target = obj
|
|
con.subtarget = twist_name
|
|
|
|
con = lleg2.constraints.new('DAMPED_TRACK')
|
|
con.name = "trackto"
|
|
con.target = obj
|
|
con.subtarget = definitions[3]
|
|
|
|
# Foot constraint
|
|
con = foot.constraints.new('COPY_ROTATION')
|
|
con.name = "copy_rot"
|
|
con.target = obj
|
|
con.subtarget = definitions[3]
|
|
|
|
# Toe constraint
|
|
con = toe.constraints.new('COPY_ROTATION')
|
|
con.name = "copy_rot"
|
|
con.target = obj
|
|
con.subtarget = definitions[4]
|
|
|
|
bpy.ops.object.mode_set(mode='EDIT')
|
|
return (uleg1_name, uleg2_name, lleg1_name, lleg2_name, foot_name, toe_name, None)
|
|
|
|
|
|
|
|
|
|
def main(obj, bone_definition, base_names, options):
|
|
bones_fk = fk(obj, bone_definition, base_names, options)
|
|
bones_ik = ik(obj, bone_definition, base_names, options)
|
|
deform(obj, bone_definition, base_names, options)
|
|
return bones_ik
|