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#====================== BEGIN GPL LICENSE BLOCK ======================
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#======================= END GPL LICENSE BLOCK ========================
# <pep8 compliant>
import bpy
from ....utils import copy_bone
from .limb_utils import get_bone_name, make_constraint
from ..super_widgets import create_hand_widget
from .....utils.mechanism import make_property
def create_arm( cls, bones ):
org_bones = cls.org_bones
bpy.ops.object.mode_set(mode='EDIT')
eb = cls.obj.data.edit_bones
ctrl = get_bone_name( org_bones[2], 'ctrl', 'ik' )
# Create IK arm control
ctrl = copy_bone( cls.obj, org_bones[2], ctrl )
# clear parent (so that rigify will parent to root)
eb[ ctrl ].parent = None
eb[ ctrl ].use_connect = False
# Parent
eb[ bones['ik']['mch_target'] ].parent = eb[ ctrl ]
eb[ bones['ik']['mch_target'] ].use_connect = False
# Set up constraints
# Constrain mch target bone to the ik control and mch stretch
make_constraint( cls, bones['ik']['mch_target'], {
'constraint' : 'COPY_LOCATION',
'subtarget' : bones['ik']['mch_str'],
'head_tail' : 1.0
})
# Constrain mch ik stretch bone to the ik control
make_constraint( cls, bones['ik']['mch_str'], {
'constraint' : 'DAMPED_TRACK',
'subtarget' : ctrl,
})
make_constraint( cls, bones['ik']['mch_str'], {
'constraint' : 'STRETCH_TO',
'subtarget' : ctrl,
})
make_constraint( cls, bones['ik']['mch_str'], {
'constraint' : 'LIMIT_SCALE',
'use_min_y' : True,
'use_max_y' : True,
'max_y' : 1.05,
'owner_space' : 'LOCAL'
})
pb = cls.obj.pose.bones
# Modify rotation mode for ik and tweak controls
pb[bones['ik']['ctrl']['limb']].rotation_mode = 'ZXY'
for b in bones['tweak']['ctrl']:
pb[b].rotation_mode = 'ZXY'
# Create ik/fk switch property
pb_parent = pb[ bones['parent'] ]
prop = make_property(pb_parent, 'IK_Strertch', 1.0, description='IK Stretch')
# Add driver to limit scale constraint influence
b = bones['ik']['mch_str']
drv_fcu = pb[b].constraints[-1].driver_add("influence")
drv = drv_fcu.driver
drv.type = 'SUM'
var = drv.variables.new()
var.name = prop.name
var.type = "SINGLE_PROP"
var.targets[0].id = cls.obj
var.targets[0].data_path = \
pb_parent.path_from_id() + '['+ '"' + prop.name + '"' + ']'
drv_modifier = drv_fcu.modifiers[0]
drv_modifier.mode = 'POLYNOMIAL'
drv_modifier.poly_order = 1
drv_modifier.coefficients[0] = 1.0
drv_modifier.coefficients[1] = -1.0
# Create hand widget
create_hand_widget(cls.obj, ctrl, bone_transform_name=None)
bones['ik']['ctrl']['terminal'] = [ ctrl ]
return bones
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