forked from bartvdbraak/blender
502 lines
17 KiB
Python
502 lines
17 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 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, blend_bone_list, get_side_name, get_base_name
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from rna_prop_ui import rna_idprop_ui_prop_get
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METARIG_NAMES = "hips", "thigh", "shin", "foot", "toe", "heel"
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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('hips')
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bone.head[:] = 0.0000, 0.0000, 0.0000
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bone.tail[:] = 0.0000, 0.0000, 0.2506
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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[:] = 0.1253, 0.0000, -0.0000
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bone.tail[:] = 0.0752, -0.0251, -0.4260
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bone.roll = 0.1171
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bone.connected = False
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bone.parent = arm.edit_bones['hips']
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bone = arm.edit_bones.new('shin')
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bone.head[:] = 0.0752, -0.0251, -0.4260
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bone.tail[:] = 0.0752, 0.0000, -0.8771
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bone.roll = 0.0000
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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[:] = 0.0752, 0.0000, -0.8771
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bone.tail[:] = 0.1013, -0.1481, -0.9773
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bone.roll = -0.4662
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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[:] = 0.1013, -0.1481, -0.9773
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bone.tail[:] = 0.1100, -0.2479, -0.9773
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bone.roll = 3.1416
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bone.connected = True
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bone.parent = arm.edit_bones['foot']
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bone = arm.edit_bones.new('heel')
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bone.head[:] = 0.0652, 0.0501, -1.0024
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bone.tail[:] = 0.0927, -0.1002, -1.0024
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bone.roll = 0.0000
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bone.connected = False
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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_biped'
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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 < 2: # 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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children = bone.children
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# Now there must be 2 children, only one connected
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if len(children) != 2:
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raise RigifyError("expected the foot bone:'%s' to have 2 children" % bone.name)
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if children[0].connected == children[1].connected:
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raise RigifyError("expected one bone to be connected")
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toe, heel = children
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if heel.connected:
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toe, heel = heel, toe
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bone_definition.append(toe.name)
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bone_definition.append(heel.name)
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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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arm = obj.data
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# setup the existing bones, use names from METARIG_NAMES
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mt_chain = bone_class_instance(obj, ["thigh", "shin", "foot", "toe"])
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mt = bone_class_instance(obj, ["hips", "heel"])
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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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# children of ik_foot
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ik = bone_class_instance(obj, ["foot", "foot_roll", "foot_roll_01", "foot_roll_02", "knee_target"])
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# Make a new chain
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ik_chain = mt_chain.copy(to_fmt="MCH-%s", base_names=base_names)
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# simple rename
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ik_chain.rename("thigh", ik_chain.thigh + "_ik")
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ik_chain.rename("shin", ik_chain.shin + "_ik")
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# make sure leg is child of hips
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ik_chain.thigh_e.parent = mt.hips_e
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# ik foot: no parents
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base_foot_name = get_base_name(base_names[mt_chain.foot])
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ik.foot_e = copy_bone_simple(arm, mt.heel, base_foot_name + "_ik" + get_side_name(base_names[mt_chain.foot]))
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ik.foot = ik.foot_e.name
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ik.foot_e.translate(mt_chain.foot_e.head - ik.foot_e.head)
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ik.foot_e.local_location = False
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# foot roll: heel pointing backwards, half length
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ik.foot_roll_e = copy_bone_simple(arm, mt.heel, base_foot_name + "_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.tail = ik.foot_roll_e.head - ik.foot_roll_e.vector / 2.0
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ik.foot_roll_e.parent = ik.foot_e # heel is disconnected
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# heel pointing forwards to the toe base, parent of the following 2 bones
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ik.foot_roll_01_e = copy_bone_simple(arm, mt.heel, "MCH-%s_roll.01" % base_foot_name)
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ik.foot_roll_01 = ik.foot_roll_01_e.name
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ik.foot_roll_01_e.tail = mt_chain.foot_e.tail
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ik.foot_roll_01_e.parent = ik.foot_e # heel is disconnected
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# same as above but reverse direction
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ik.foot_roll_02_e = copy_bone_simple(arm, mt.heel, "MCH-%s_roll.02" % base_foot_name)
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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 # heel is disconnected
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ik.foot_roll_02_e.head = mt_chain.foot_e.tail
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ik.foot_roll_02_e.tail = mt.heel_e.head
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del base_foot_name
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# rename 'MCH-toe' --> to 'toe_ik' and make the child of ik.foot_roll_01
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# ------------------ FK or IK?
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ik_chain.rename("toe", get_base_name(base_names[mt_chain.toe]) + "_ik" + get_side_name(base_names[mt_chain.toe]))
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ik_chain.toe_e.connected = False
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ik_chain.toe_e.parent = ik.foot_roll_01_e
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# re-parent ik_chain.foot to the
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ik_chain.foot_e.connected = False
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ik_chain.foot_e.parent = ik.foot_roll_02_e
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# knee target is the heel moved up and forward on its local axis
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ik.knee_target_e = copy_bone_simple(arm, mt.heel, "knee_target" + get_side_name(mt.heel))
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ik.knee_target = ik.knee_target_e.name
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offset = ik.knee_target_e.tail - ik.knee_target_e.head
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offset.z = 0
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offset.length = mt_chain.shin_e.head.z - mt.heel_e.head.z
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offset.z += offset.length
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ik.knee_target_e.translate(offset)
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ik.knee_target_e.length *= 0.5
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ik.knee_target_e.parent = ik.foot_e
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ik.knee_target_e.local_location = False
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# roll the bone to point up... could also point in the same direction as ik.foot_roll
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# ik.foot_roll_02_e.matrix * Vector(0.0, 0.0, 1.0) # ACK!, no rest matrix in editmode
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ik.foot_roll_01_e.align_roll((0.0, 0.0, -1.0))
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bpy.ops.object.mode_set(mode='OBJECT')
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ik.update()
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mt_chain.update()
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ik_chain.update()
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# Set IK dof
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ik_chain.shin_p.ik_dof_x = True
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ik_chain.shin_p.ik_dof_y = False
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ik_chain.shin_p.ik_dof_z = False
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# Set rotation modes and axis locks
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ik.foot_roll_p.rotation_mode = 'XYZ'
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ik.foot_roll_p.lock_rotation = False, True, True
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ik_chain.toe_p.rotation_mode = 'YXZ'
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ik_chain.toe_p.lock_rotation = False, True, True
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ik_chain.toe_p.lock_location = True, True, True
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ik.foot_roll_p.lock_location = True, True, True
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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 = -pi / 2.0
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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_chain.foot
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con.pole_target = obj
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con.pole_subtarget = ik.knee_target
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# foot roll
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cons = [ \
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(ik.foot_roll_01_p.constraints.new('COPY_ROTATION'), ik.foot_roll_01_p.constraints.new('LIMIT_ROTATION')), \
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(ik.foot_roll_02_p.constraints.new('COPY_ROTATION'), ik.foot_roll_02_p.constraints.new('LIMIT_ROTATION'))]
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for con, con_l in cons:
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con.target = obj
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con.subtarget = ik.foot_roll
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con.use_x, con.use_y, con.use_z = True, False, False
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con.target_space = con.owner_space = 'LOCAL'
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con = con_l
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con.use_limit_x, con.use_limit_y, con.use_limit_z = True, False, False
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con.owner_space = 'LOCAL'
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if con_l is cons[-1][-1]:
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con.minimum_x = 0.0
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con.maximum_x = 180.0 # XXX -deg
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else:
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con.minimum_x = -180.0 # XXX -deg
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con.maximum_x = 0.0
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# last step setup layers
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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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getattr(ik_chain, attr + "_b").layer = layer
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for attr in ik.attr_names:
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getattr(ik, attr + "_b").layer = layer
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bpy.ops.object.mode_set(mode='EDIT')
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return (None, ik_chain.thigh, ik_chain.shin, ik_chain.foot, ik_chain.toe, None, ik.foot)
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def fk(obj, bone_definition, base_names, options):
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from Mathutils import Vector
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arm = obj.data
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# these account for all bones in METARIG_NAMES
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mt_chain = bone_class_instance(obj, ["thigh", "shin", "foot", "toe"])
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mt = bone_class_instance(obj, ["hips", "heel"])
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# new bones
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ex = bone_class_instance(obj, ["thigh_socket", "thigh_hinge"])
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for bone_class in (mt, mt_chain):
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for attr in bone_class.attr_names:
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i = METARIG_NAMES.index(attr)
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ebone = arm.edit_bones[bone_definition[i]]
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setattr(bone_class, attr, ebone.name)
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bone_class.update()
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ex.thigh_socket_e = copy_bone_simple(arm, mt_chain.thigh, "MCH-%s_socket" % base_names[mt_chain.thigh], parent=True)
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ex.thigh_socket = ex.thigh_socket_e.name
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ex.thigh_socket_e.tail = ex.thigh_socket_e.head + Vector(0.0, 0.0, ex.thigh_socket_e.length / 4.0)
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ex.thigh_hinge_e = copy_bone_simple(arm, mt.hips, "MCH-%s_hinge" % base_names[mt_chain.thigh], parent=False)
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ex.thigh_hinge = ex.thigh_hinge_e.name
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fk_chain = mt_chain.copy(base_names=base_names) # fk has no prefix!
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fk_chain.foot_e.name = "MCH-" + fk_chain.foot
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fk_chain.foot = fk_chain.foot_e.name
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# Set up fk foot control
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foot_e = copy_bone_simple(arm, mt.heel, base_names[mt_chain.foot])
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foot = foot_e.name
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foot_e.translate(mt_chain.foot_e.head - foot_e.head)
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foot_e.parent = fk_chain.shin_e
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foot_e.connected = fk_chain.foot_e.connected
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fk_chain.foot_e.connected = False
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fk_chain.foot_e.parent = foot_e
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fk_chain.thigh_e.connected = False
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fk_chain.thigh_e.parent = ex.thigh_hinge_e
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bpy.ops.object.mode_set(mode='OBJECT')
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ex.update()
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mt_chain.update()
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fk_chain.update()
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foot_p = obj.pose.bones[foot]
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# Set rotation modes and axis locks
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fk_chain.shin_p.rotation_mode = 'XYZ'
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fk_chain.shin_p.lock_rotation = False, True, True
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foot_p.rotation_mode = 'YXZ'
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fk_chain.toe_p.rotation_mode = 'YXZ'
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fk_chain.toe_p.lock_rotation = False, True, True
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fk_chain.thigh_p.lock_location = True, True, True
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con = fk_chain.thigh_p.constraints.new('COPY_LOCATION')
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con.target = obj
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con.subtarget = ex.thigh_socket
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# hinge
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prop = rna_idprop_ui_prop_get(fk_chain.thigh_p, "hinge", create=True)
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fk_chain.thigh_p["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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con = ex.thigh_hinge_p.constraints.new('COPY_ROTATION')
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con.target = obj
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con.subtarget = mt.hips
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# add driver
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hinge_driver_path = fk_chain.thigh_p.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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# last step setup layers
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if "fk_layer" in options:
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layer = [n == options["fk_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 fk_chain.attr_names:
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getattr(fk_chain, attr + "_b").layer = layer
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for attr in ex.attr_names:
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getattr(ex, attr + "_b").layer = layer
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arm.bones[foot].layer = layer
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bpy.ops.object.mode_set(mode='EDIT')
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# dont blend the hips or heel
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return (None, fk_chain.thigh, fk_chain.shin, fk_chain.foot, fk_chain.toe, None, None)
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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]
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uleg2 = obj.pose.bones[uleg2_name]
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lleg1 = obj.pose.bones[lleg1_name]
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lleg2 = obj.pose.bones[lleg2_name]
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foot = obj.pose.bones[foot_name]
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toe = obj.pose.bones[toe_name]
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|
|
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# Upper leg constraints
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|
con = uleg1.constraints.new('DAMPED_TRACK')
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con.name = "trackto"
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con.target = obj
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|
con.subtarget = definitions[2]
|
|
|
|
con = uleg1.constraints.new('COPY_SCALE')
|
|
con.name = "scale"
|
|
con.target = obj
|
|
con.subtarget = definitions[1]
|
|
|
|
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 = lleg1.constraints.new('COPY_SCALE')
|
|
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)
|
|
|
|
bpy.ops.object.mode_set(mode='OBJECT')
|
|
blend_bone_list(obj, bone_definition + [None], bones_fk, bones_ik, target_bone=bones_ik[6], target_prop="ik", blend_default=1.0)
|