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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 ========================
import bpy
import math
from rigify.utils import MetarigError
from rigify.utils import copy_bone, flip_bone, put_bone
from rigify.utils import connected_children_names
from rigify.utils import strip_org, make_mechanism_name, make_deformer_name
from rigify.utils import get_layers
from rigify.utils import create_widget, create_limb_widget
from rna_prop_ui import rna_idprop_ui_prop_get
class Rig:
""" An FK arm rig, with hinge switch.
"""
def __init__(self, obj, bone, params):
""" Gather and validate data about the rig.
Store any data or references to data that will be needed later on.
In particular, store references to bones that will be needed, and
store names of bones that will be needed.
Do NOT change any data in the scene. This is a gathering phase only.
"""
self.obj = obj
self.params = params
# Get the chain of 3 connected bones
self.org_bones = [bone] + connected_children_names(self.obj, bone)[:2]
if len(self.org_bones) != 3:
raise MetarigError("RIGIFY ERROR: Bone '%s': input to rig type must be a chain of 3 bones." % (strip_org(bone)))
# Get (optional) parent
if self.obj.data.bones[bone].parent == None:
self.org_parent = None
else:
self.org_parent = self.obj.data.bones[bone].parent.name
# Get the rig parameters
if "layers" in params:
self.layers = get_layers(params["layers"])
else:
self.layers = None
self.primary_rotation_axis = params.primary_rotation_axis
def generate(self):
""" Generate the rig.
Do NOT modify any of the original bones, except for adding constraints.
The main armature should be selected and active before this is called.
"""
bpy.ops.object.mode_set(mode='EDIT')
# Create the control bones
uarm = copy_bone(self.obj, self.org_bones[0], strip_org(self.org_bones[0]))
farm = copy_bone(self.obj, self.org_bones[1], strip_org(self.org_bones[1]))
hand = copy_bone(self.obj, self.org_bones[2], strip_org(self.org_bones[2]))
# Create the hinge bones
if self.org_parent != None:
hinge = copy_bone(self.obj, self.org_parent, make_mechanism_name(uarm + ".hinge"))
socket1 = copy_bone(self.obj, uarm, make_mechanism_name(uarm + ".socket1"))
socket2 = copy_bone(self.obj, uarm, make_mechanism_name(uarm + ".socket2"))
# Get edit bones
eb = self.obj.data.edit_bones
uarm_e = eb[uarm]
farm_e = eb[farm]
hand_e = eb[hand]
if self.org_parent != None:
hinge_e = eb[hinge]
socket1_e = eb[socket1]
socket2_e = eb[socket2]
# Parenting
farm_e.parent = uarm_e
hand_e.parent = farm_e
if self.org_parent != None:
hinge_e.use_connect = False
socket1_e.use_connect = False
socket2_e.use_connect = False
uarm_e.parent = hinge_e
hinge_e.parent = socket2_e
socket2_e.parent = None
# Positioning
if self.org_parent != None:
center = (hinge_e.head + hinge_e.tail) / 2
hinge_e.head = center
socket1_e.length /= 4
socket2_e.length /= 3
# Object mode, get pose bones
bpy.ops.object.mode_set(mode='OBJECT')
pb = self.obj.pose.bones
uarm_p = pb[uarm]
farm_p = pb[farm]
hand_p = pb[hand]
if self.org_parent != None:
socket1_p = pb[socket1]
socket2_p = pb[socket2]
# Set the elbow to only bend on the x-axis.
farm_p.rotation_mode = 'XYZ'
if 'X' in self.primary_rotation_axis:
farm_p.lock_rotation = (False, True, True)
elif 'Y' in self.primary_rotation_axis:
farm_p.lock_rotation = (True, False, True)
else:
farm_p.lock_rotation = (True, True, False)
# Set up custom properties
if self.org_parent != None:
prop = rna_idprop_ui_prop_get(uarm_p, "isolate", create=True)
uarm_p["isolate"] = 0.0
prop["soft_min"] = prop["min"] = 0.0
prop["soft_max"] = prop["max"] = 1.0
# Hinge constraints / drivers
if self.org_parent != None:
con = socket2_p.constraints.new('COPY_LOCATION')
con.name = "copy_location"
con.target = self.obj
con.subtarget = socket1
con = socket2_p.constraints.new('COPY_TRANSFORMS')
con.name = "isolate_off"
con.target = self.obj
con.subtarget = socket1
# Driver
fcurve = con.driver_add("influence")
driver = fcurve.driver
var = driver.variables.new()
driver.type = 'AVERAGE'
var.name = "var"
var.targets[0].id_type = 'OBJECT'
var.targets[0].id = self.obj
var.targets[0].data_path = uarm_p.path_from_id() + '["isolate"]'
mod = fcurve.modifiers[0]
mod.poly_order = 1
mod.coefficients[0] = 1.0
mod.coefficients[1] = -1.0
# Constrain org bones to controls
con = pb[self.org_bones[0]].constraints.new('COPY_TRANSFORMS')
con.name = "fk"
con.target = self.obj
con.subtarget = uarm
con = pb[self.org_bones[1]].constraints.new('COPY_TRANSFORMS')
con.name = "fk"
con.target = self.obj
con.subtarget = farm
con = pb[self.org_bones[2]].constraints.new('COPY_TRANSFORMS')
con.name = "fk"
con.target = self.obj
con.subtarget = hand
# Set layers if specified
if self.layers:
uarm_p.bone.layers = self.layers
farm_p.bone.layers = self.layers
hand_p.bone.layers = self.layers
# Create control widgets
create_limb_widget(self.obj, uarm)
create_limb_widget(self.obj, farm)
ob = create_widget(self.obj, hand)
if ob != None:
verts = [(0.7, 1.5, 0.0), (0.7, -0.25, 0.0), (-0.7, -0.25, 0.0), (-0.7, 1.5, 0.0), (0.7, 0.723, 0.0), (-0.7, 0.723, 0.0), (0.7, 0.0, 0.0), (-0.7, 0.0, 0.0)]
edges = [(1, 2), (0, 3), (0, 4), (3, 5), (4, 6), (1, 6), (5, 7), (2, 7)]
mesh = ob.data
mesh.from_pydata(verts, edges, [])
mesh.update()
mod = ob.modifiers.new("subsurf", 'SUBSURF')
mod.levels = 2
return [uarm, farm, hand]