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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 #####
# <pep8 compliant>
# rigify its self does not depend on this module, however some of the
# rigify templates use these utility functions.
#
# So even though this can be for general purpose use, this module was created
# for rigify so in some cases seemingly generic functions make assumptions
# that a generic function would need to check for.
import bpy
from Mathutils import Vector
from rna_prop_ui import rna_idprop_ui_prop_get
DELIMITER = '-._'
EMPTY_LAYER = [False] * 32
def add_stretch_to(obj, from_name, to_name, name):
'''
Adds a bone that stretches from one to another
'''
mode_orig = obj.mode
bpy.ops.object.mode_set(mode='EDIT')
arm = obj.data
stretch_ebone = arm.edit_bones.new(name)
stretch_name = stretch_ebone.name
del name
head = stretch_ebone.head = arm.edit_bones[from_name].head.copy()
#tail = stretch_ebone.tail = arm.edit_bones[to_name].head.copy()
# annoying exception for zero length bones, since its using stretch_to the rest pose doesnt really matter
#if (head - tail).length < 0.1:
if 1:
tail = stretch_ebone.tail = arm.edit_bones[from_name].tail.copy()
# Now for the constraint
bpy.ops.object.mode_set(mode='OBJECT')
stretch_pbone = obj.pose.bones[stretch_name]
con = stretch_pbone.constraints.new('COPY_LOCATION')
con.target = obj
con.subtarget = from_name
con = stretch_pbone.constraints.new('STRETCH_TO')
con.target = obj
con.subtarget = to_name
con.original_length = (head - tail).length
con.keep_axis = 'PLANE_X'
con.volume = 'NO_VOLUME'
bpy.ops.object.mode_set(mode=mode_orig)
return stretch_name
def copy_bone_simple(arm, from_bone, name, parent=False):
ebone = arm.edit_bones[from_bone]
ebone_new = arm.edit_bones.new(name)
if parent:
ebone_new.connected = ebone.connected
ebone_new.parent = ebone.parent
ebone_new.head = ebone.head
ebone_new.tail = ebone.tail
ebone_new.roll = ebone.roll
ebone_new.layer = list(ebone.layer)
return ebone_new
def copy_bone_simple_list(arm, from_bones, to_bones, parent=False):
if len(from_bones) != len(to_bones):
raise Exception("bone list sizes must match")
copy_bones = [copy_bone_simple(arm, bone_name, to_bones[i], True) for i, bone_name in enumerate(from_bones)]
# now we need to re-parent
for ebone in copy_bones:
parent = ebone.parent
if parent:
try:
i = from_bones.index(parent.name)
except:
i = -1
if i == -1:
ebone.parent = None
else:
ebone.parent = copy_bones[i]
return copy_bones
def blend_bone_list(obj, apply_bones, from_bones, to_bones, target_bone=None, target_prop="blend", blend_default=0.5):
if obj.mode == 'EDIT':
raise Exception("blending cant be called in editmode")
if len(apply_bones) != len(from_bones):
raise Exception("lists differ in length (from -> apply): \n\t%s\n\t%s" % (from_bones, apply_bones))
if len(apply_bones) != len(to_bones):
raise Exception("lists differ in length (to -> apply): \n\t%s\n\t%s" % (to_bones, apply_bones))
# setup the blend property
if target_bone is None:
target_bone = apply_bones[-1] # default to the last bone
prop_pbone = obj.pose.bones[target_bone]
if prop_pbone.get(target_bone) is None:
prop = rna_idprop_ui_prop_get(prop_pbone, target_prop, create=True)
prop_pbone[target_prop] = blend_default
prop["soft_min"] = 0.0
prop["soft_max"] = 1.0
driver_path = prop_pbone.path_to_id() + ('["%s"]' % target_prop)
def blend_target(driver):
var = driver.variables.new()
var.name = target_bone
var.targets[0].id_type = 'OBJECT'
var.targets[0].id = obj
var.targets[0].data_path = driver_path
def blend_transforms(new_pbone, from_bone_name, to_bone_name):
con = new_pbone.constraints.new('COPY_TRANSFORMS')
con.target = obj
con.subtarget = from_bone_name
con = new_pbone.constraints.new('COPY_TRANSFORMS')
con.target = obj
con.subtarget = to_bone_name
fcurve = con.driver_add("influence", 0)
driver = fcurve.driver
driver.type = 'AVERAGE'
fcurve.modifiers.remove(0) # grr dont need a modifier
blend_target(driver)
for i, new_bone_name in enumerate(apply_bones):
from_bone_name = from_bones[i]
to_bone_name = to_bones[i]
# allow skipping some bones by having None in the list
if None in (new_bone_name, from_bone_name, to_bone_name):
continue
new_pbone = obj.pose.bones[new_bone_name]
blend_transforms(new_pbone, from_bone_name, to_bone_name)
def add_pole_target_bone(obj, base_bone_name, name, mode='CROSS'):
'''
Does not actually create a poll target, just the bone to use as a poll target
'''
mode_orig = obj.mode
bpy.ops.object.mode_set(mode='EDIT')
arm = obj.data
poll_ebone = arm.edit_bones.new(name)
base_ebone = arm.edit_bones[base_bone_name]
poll_name = poll_ebone.name
parent_ebone = base_ebone.parent
base_head = base_ebone.head.copy()
base_tail = base_ebone.tail.copy()
base_dir = base_head - base_tail
parent_head = parent_ebone.head.copy()
parent_tail = parent_ebone.tail.copy()
parent_dir = parent_head - parent_tail
distance = (base_dir.length + parent_dir.length)
if mode == 'CROSS':
# direction from the angle of the joint
offset = base_dir.copy().normalize() - parent_dir.copy().normalize()
offset.length = distance
elif mode == 'ZAVERAGE':
# between both bones Z axis
z_axis_a = base_ebone.matrix.copy().rotation_part() * Vector(0.0, 0.0, -1.0)
z_axis_b = parent_ebone.matrix.copy().rotation_part() * Vector(0.0, 0.0, -1.0)
offset = (z_axis_a + z_axis_b).normalize() * distance
else:
# preset axis
offset = Vector(0, 0, 0)
if mode[0] == "+":
val = distance
else:
val = - distance
setattr(offset, mode[1].lower(), val)
poll_ebone.head = base_head + offset
poll_ebone.tail = base_head + (offset * (1.0 - (1.0 / 4.0)))
bpy.ops.object.mode_set(mode=mode_orig)
return poll_name
def get_side_name(name):
'''
Returns the last part of a string (typically a bone's name) indicating
whether it is a a left or right (or center, or whatever) bone.
Returns an empty string if nothing is found.
'''
if name[-2] in DELIMITER:
return name[-2:]
else:
return ""
def get_base_name(name):
'''
Returns the part of a string (typically a bone's name) corresponding to it's
base name (no sidedness, no ORG prefix).
'''
if name[-2] in DELIMITER:
return name[:-2]
else:
return name
def write_meta_rig(obj, func_name="metarig_template"):
'''
Write a metarig as a python script, this rig is to have all info needed for
generating the real rig with rigify.
'''
code = []
code.append("def %s():" % func_name)
code.append(" # generated by rigify.write_meta_rig")
bpy.ops.object.mode_set(mode='EDIT')
code.append(" bpy.ops.object.mode_set(mode='EDIT')")
code.append(" obj = bpy.context.active_object")
code.append(" arm = obj.data")
arm = obj.data
# write parents first
bones = [(len(bone.parent_recursive), bone.name) for bone in arm.edit_bones]
bones.sort(key=lambda item: item[0])
bones = [item[1] for item in bones]
for bone_name in bones:
bone = arm.edit_bones[bone_name]
code.append(" bone = arm.edit_bones.new('%s')" % bone.name)
code.append(" bone.head[:] = %.4f, %.4f, %.4f" % bone.head.to_tuple(4))
code.append(" bone.tail[:] = %.4f, %.4f, %.4f" % bone.tail.to_tuple(4))
code.append(" bone.roll = %.4f" % bone.roll)
code.append(" bone.connected = %s" % str(bone.connected))
if bone.parent:
code.append(" bone.parent = arm.edit_bones['%s']" % bone.parent.name)
bpy.ops.object.mode_set(mode='OBJECT')
code.append("")
code.append(" bpy.ops.object.mode_set(mode='OBJECT')")
for bone_name in bones:
pbone = obj.pose.bones[bone_name]
pbone_written = False
# Only 1 level of props, simple types supported
for key, value in pbone.items():
if key.startswith("_"):
continue
if type(value) not in (float, str, int):
print("Unsupported ID Prop:", str((key, value)))
continue
if type(value) == str:
value = "'" + value + "'"
if not pbone_written: # only write bones we need
code.append(" pbone = obj.pose.bones['%s']" % bone_name)
code.append(" pbone['%s'] = %s" % (key, value))
return "\n".join(code)
# *** bone class collection ***
def bone_class_instance(obj, slots, name="BoneContainer"):
'''
bone collection utility class to help manage cases with
edit/pose/bone bones where switching modes can invalidate some of the members.
there are also utility functions for manipulating all members.
'''
if len(slots) != len(set(slots)):
raise Exception("duplicate entries found %s" % attr_names)
attr_names = tuple(slots) # dont modify the original
slots = list(slots) # dont modify the original
for i in range(len(slots)):
member = slots[i]
slots.append(member + "_b") # bone bone
slots.append(member + "_p") # pose bone
slots.append(member + "_e") # edit bone
class_dict = { \
"obj": obj, \
"attr_names": attr_names, \
"attr_initialize": _bone_class_instance_attr_initialize, \
"update": _bone_class_instance_update, \
"rename": _bone_class_instance_rename, \
"names": _bone_class_instance_names, \
"copy": _bone_class_instance_copy, \
"blend": _bone_class_instance_blend, \
}
instance = auto_class_instance(slots, name, class_dict)
return instance
def auto_class(slots, name="ContainerClass", class_dict=None):
if class_dict:
class_dict = class_dict.copy()
else:
class_dict = {}
class_dict["__slots__"] = tuple(slots)
return type(name, (object,), class_dict)
def auto_class_instance(slots, name="ContainerClass", class_dict=None):
return auto_class(slots, name, class_dict)()
def _bone_class_instance_attr_initialize(self, attr_names, bone_names):
''' Initializes attributes, both lists must be aligned
'''
for attr in self.attr_names:
i = attr_names.index(attr)
setattr(self, attr, bone_names[i])
self.update()
def _bone_class_instance_update(self):
''' Re-Assigns bones from the blender data
'''
arm = self.obj.data
bbones = arm.bones
pbones = self.obj.pose.bones
ebones = arm.edit_bones
for member in self.attr_names:
name = getattr(self, member, None)
if name is not None:
setattr(self, member + "_b", bbones.get(name))
setattr(self, member + "_p", pbones.get(name))
setattr(self, member + "_e", ebones.get(name))
def _bone_class_instance_rename(self, attr, new_name):
''' Rename bones, editmode only
'''
if self.obj.mode != 'EDIT':
raise Exception("Only rename in editmode supported")
ebone = getattr(self, attr + "_e")
ebone.name = new_name
# we may not get what is asked for so get the name from the editbone
setattr(self, attr, ebone.name)
def _bone_class_instance_copy(self, from_fmt="%s", to_fmt="%s", exclude_attrs=(), base_names=None):
from_name_ls = []
new_name_ls = []
new_slot_ls = []
for attr in self.attr_names:
if attr in exclude_attrs:
continue
bone_name_orig = getattr(self, attr)
ebone = getattr(self, attr + "_e")
# orig_names[attr] = bone_name_orig
# insert formatting
if from_fmt != "%s":
bone_name = from_fmt % bone_name_orig
ebone.name = bone_name
bone_name = ebone.name # cant be sure we get what we ask for
else:
bone_name = bone_name_orig
setattr(self, attr, bone_name)
new_slot_ls.append(attr)
from_name_ls.append(bone_name)
if base_names:
bone_name_orig = base_names[bone_name_orig]
new_name_ls.append(to_fmt % bone_name_orig)
new_bones = copy_bone_simple_list(self.obj.data, from_name_ls, new_name_ls, True)
new_bc = bone_class_instance(self.obj, new_slot_ls)
for i, attr in enumerate(new_slot_ls):
ebone = new_bones[i]
setattr(new_bc, attr + "_e", ebone)
setattr(new_bc, attr, ebone.name)
return new_bc
def _bone_class_instance_names(self):
return [getattr(self, attr) for attr in self.attr_names]
def _bone_class_instance_blend(self, from_bc, to_bc, target_bone=None, target_prop="blend"):
'''
Use for blending bone chains.
blend_target = (bone_name, bone_property)
default to the last bone, blend prop
XXX - toggles editmode, need to re-validate all editbones :(
'''
if self.attr_names != from_bc.attr_names or self.attr_names != to_bc.attr_names:
raise Exception("can only blend between matching chains")
apply_bones = [getattr(self, attr) for attr in self.attr_names]
from_bones = [getattr(from_bc, attr) for attr in from_bc.attr_names]
to_bones = [getattr(to_bc, attr) for attr in to_bc.attr_names]
blend_bone_list(self.obj, apply_bones, from_bones, to_bones, target_bone, target_prop)
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