blender/release/scripts/modules/rigify/finger.py

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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ##### END GPL LICENSE BLOCK #####
import bpy
from rigify import get_bone_data, empty_layer
from rna_prop_ui import rna_idprop_ui_get, rna_idprop_ui_prop_get
from functools import reduce
def main(obj, orig_bone_name):
# *** EDITMODE
# get assosiated data
arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name)
obj.animation_data_create() # needed if its a new armature with no keys
arm.layer[0] = arm.layer[8] = True
children = orig_pbone.children_recursive
tot_len = reduce(lambda f, pbone: f + pbone.bone.length, children, orig_pbone.bone.length)
base_name = orig_pbone.basename
# first make a new bone at the location of the finger
control_ebone = arm.edit_bones.new(base_name)
control_bone_name = control_ebone.name # we dont know if we get the name requested
control_ebone.connected = orig_ebone.connected
control_ebone.parent = orig_ebone.parent
# Place the finger bone
head = orig_ebone.head.copy()
tail = orig_ebone.tail.copy()
control_ebone.head = head
control_ebone.tail = head + ((tail - head).normalize() * tot_len)
control_ebone.roll = orig_ebone.roll
# now add bones inbetween this and its children recursively
# switching modes so store names only!
children = [pbone.name for pbone in children]
# set an alternate layer for driver bones
other_layer = empty_layer[:]
other_layer[8] = True
driver_bone_pairs = []
for child_bone_name in children:
arm, pbone_child, child_ebone = get_bone_data(obj, child_bone_name)
# finger.02 --> finger_driver.02
driver_bone_name = child_bone_name.split('.')
driver_bone_name = driver_bone_name[0] + "_driver." + ".".join(driver_bone_name[1:])
driver_ebone = arm.edit_bones.new(driver_bone_name)
driver_bone_name = driver_ebone.name # cant be too sure!
driver_ebone.layer = other_layer
new_len = pbone_child.bone.length / 2.0
head = child_ebone.head.copy()
tail = child_ebone.tail.copy()
driver_ebone.head = head
driver_ebone.tail = head + ((tail - head).normalize() * new_len)
driver_ebone.roll = child_ebone.roll
# Insert driver_ebone in the chain without connected parents
driver_ebone.connected = False
driver_ebone.parent = child_ebone.parent
child_ebone.connected = False
child_ebone.parent = driver_ebone
# Add the drivers to these when in posemode.
driver_bone_pairs.append((child_bone_name, driver_bone_name))
del control_ebone
# *** POSEMODE
bpy.ops.object.mode_set(mode='OBJECT')
arm, orig_pbone, orig_bone = get_bone_data(obj, orig_bone_name)
arm, control_pbone, control_bone= get_bone_data(obj, control_bone_name)
# only allow Y scale
control_pbone.lock_scale = (True, False, True)
control_pbone["bend_ratio"] = 0.4
prop = rna_idprop_ui_prop_get(control_pbone, "bend_ratio", create=True)
prop["soft_min"] = 0.0
prop["soft_max"] = 1.0
con = orig_pbone.constraints.new('COPY_LOCATION')
con.target = obj
con.subtarget = control_bone_name
con = orig_pbone.constraints.new('COPY_ROTATION')
con.target = obj
con.subtarget = control_bone_name
# setup child drivers on each new smaller bone added. assume 2 for now.
# drives the bones
controller_path = control_pbone.path_to_id() # 'pose.bones["%s"]' % control_bone_name
i = 0
for child_bone_name, driver_bone_name in driver_bone_pairs:
# XXX - todo, any number
if i==2:
break
arm, driver_pbone, driver_bone = get_bone_data(obj, driver_bone_name)
driver_pbone.rotation_mode = 'YZX'
fcurve_driver = driver_pbone.driver_add("rotation_euler", 0)
#obj.driver_add('pose.bones["%s"].scale', 1)
#obj.animation_data.drivers[-1] # XXX, WATCH THIS
driver = fcurve_driver.driver
# scale target
tar = driver.targets.new()
tar.name = "scale"
tar.id_type = 'OBJECT'
tar.id = obj
tar.rna_path = controller_path + '.scale[1]'
# bend target
tar = driver.targets.new()
tar.name = "br"
tar.id_type = 'OBJECT'
tar.id = obj
tar.rna_path = controller_path + '["bend_ratio"]'
# XXX - todo, any number
if i==0:
driver.expression = '(-scale+1.0)*pi*2.0*(1.0-br)'
elif i==1:
driver.expression = '(-scale+1.0)*pi*2.0*br'
arm, child_pbone, child_bone = get_bone_data(obj, child_bone_name)
# only allow X rotation
driver_pbone.lock_rotation = child_pbone.lock_rotation = (False, True, True)
i += 1