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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 rigify import RigifyError
from rigify_utils import copy_bone_simple
METARIG_NAMES = tuple()
RIG_TYPE = "stretch_twist"
# TODO
#def metarig_template():
# # generated by rigify.write_meta_rig
# bpy.ops.object.mode_set(mode='EDIT')
# obj = bpy.context.active_object
# arm = obj.data
# bone = arm.edit_bones.new('Bone')
# bone.head[:] = 0.0000, 0.0000, 0.0000
# bone.tail[:] = 0.0000, 0.0000, 1.0000
# bone.roll = 0.0000
# bone.use_connect = False
#
# bpy.ops.object.mode_set(mode='OBJECT')
# pbone = obj.pose.bones['Bone']
# pbone['type'] = 'copy'
bool_map = {0:False, 1:True,
0.0:False, 1.0:True,
"false":False, "true":True,
"False":False, "True":True,
"no":False, "yes":True,
"No":False, "Yes":True}
def metarig_definition(obj, orig_bone_name):
return (orig_bone_name,)
def main(obj, bone_definition, base_names, options):
""" A dual-bone stretchy bone setup. Each half follows the twist of the
bone on its side.
Deformation only (no controls).
"""
# Verify required parameter
if "to" not in options:
raise RigifyError("'%s' rig type requires a 'to' parameter (bone: %s)" % (RIG_TYPE, base_names[0]))
if type(options["to"]) is not str:
raise RigifyError("'%s' rig type 'to' parameter must be a string (bone: %s)" % (RIG_TYPE, base_names[0]))
if ("ORG-" + options["to"]) not in obj.data.bones:
raise RigifyError("'%s' rig type 'to' parameter must name a bone in the metarig (bone: %s)" % (RIG_TYPE, base_names[0]))
preserve_volume = None
# Check optional parameter
if "preserve_volume" in options:
try:
preserve_volume = bool_map[options["preserve_volume"]]
except KeyError:
preserve_volume = False
eb = obj.data.edit_bones
bb = obj.data.bones
pb = obj.pose.bones
bpy.ops.object.mode_set(mode='EDIT')
arm = obj.data
mbone1 = bone_definition[0]
mbone2 = "ORG-" + options["to"]
bone_e = copy_bone_simple(obj.data, mbone1, "MCH-%s" % base_names[bone_definition[0]])
bone_e.use_connect = False
bone_e.parent = None
bone_e.head = (eb[mbone1].head + eb[mbone2].head) / 2
bone_e.tail = (bone_e.head[0], bone_e.head[1], bone_e.head[2]+0.1)
mid_bone = bone_e.name
bone_e = copy_bone_simple(obj.data, mbone1, "DEF-%s.01" % base_names[bone_definition[0]])
bone_e.use_connect = False
bone_e.parent = eb[mbone1]
bone_e.tail = eb[mid_bone].head
bone1 = bone_e.name
bone_e = copy_bone_simple(obj.data, mbone2, "DEF-%s.02" % base_names[bone_definition[0]])
bone_e.use_connect = False
bone_e.parent = eb[mbone2]
bone_e.tail = eb[mid_bone].head
bone2 = bone_e.name
bpy.ops.object.mode_set(mode='OBJECT')
# Constraints
# Mid bone
con = pb[mid_bone].constraints.new('COPY_LOCATION')
con.target = obj
con.subtarget = mbone1
con = pb[mid_bone].constraints.new('COPY_LOCATION')
con.target = obj
con.subtarget = mbone2
con.influence = 0.5
# Bone 1
con = pb[bone1].constraints.new('DAMPED_TRACK')
con.target = obj
con.subtarget = mid_bone
con = pb[bone1].constraints.new('STRETCH_TO')
con.target = obj
con.subtarget = mid_bone
con.rest_length = bb[bone1].length
if preserve_volume:
con.volume = 'VOLUME_XZX'
else:
con.volume = 'NO_VOLUME'
# Bone 2
con = pb[bone2].constraints.new('DAMPED_TRACK')
con.target = obj
con.subtarget = mid_bone
con = pb[bone2].constraints.new('STRETCH_TO')
con.target = obj
con.subtarget = mid_bone
con.rest_length = bb[bone2].length
if preserve_volume:
con.volume = 'VOLUME_XZX'
else:
con.volume = 'NO_VOLUME'
return tuple()
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