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basic support for Sintels arm rig with property driven ik/fk switching and stretch bones to display connections, still need to do shoulder hinge and hand delta offset bones

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Campbell Barton 2009-11-26 13:36:15 +00:00
parent 0eb70a4ca9
commit 68b100232b
1 changed files with 288 additions and 53 deletions
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341
release/scripts/modules/rigify.py
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@ -18,6 +18,7 @@
import bpy
from functools import reduce
from Mathutils import Vector
# TODO, have these in a more general module
from rna_prop_ui import rna_idprop_ui_get, rna_idprop_ui_prop_get
@ -36,31 +37,47 @@ def get_bone_data(obj, bone_name):
else:
bone = arm.bones[bone_name]
return obj, arm, pbone, bone
return arm, pbone, bone
def bone_basename(name):
return name.split(".")[0]
def copy_bone_simple(arm, from_bone, name):
ebone = arm.edit_bones[from_bone]
ebone_new = arm.edit_bones.new(name)
ebone_new.head = ebone.head
ebone_new.tail = ebone.tail
ebone_new.roll = ebone.roll
return ebone_new
def add_stretch_to(obj, from_name, to_name, name):
'''
Adds a bone that stretches from one to another
'''
is_editmode = (obj.mode == 'EDIT')
if not is_editmode:
bpy.ops.object.mode_set(mode='EDIT')
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()
#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')
from_pbone = obj.pose.bones[from_name]
to_pbone = obj.pose.bones[to_name]
stretch_pbone = obj.pose.bones[stretch_name]
con = stretch_pbone.constraints.new('COPY_LOCATION')
@ -70,14 +87,55 @@ def add_stretch_to(obj, from_name, to_name, name):
con = stretch_pbone.constraints.new('STRETCH_TO')
con.target = obj
con.subtarget = to_name
con.original_length = (head-tail).length
con.original_length = (head - tail).length
con.keep_axis = 'PLANE_X'
con.volume = 'NO_VOLUME'
if is_editmode:
bpy.ops.object.mode_set(mode='EDIT')
#else:
# bpy.ops.object.mode_set(mode='OBJECT')
bpy.ops.object.mode_set(mode=mode_orig)
def add_pole_target_bone(obj, base_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(base_name + "_poll")
base_ebone = arm.edit_bones[base_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':
offset = base_dir.copy().normalize() - parent_dir.copy().normalize()
offset.length = distance
else:
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 gen_finger(obj, orig_bone_name):
@ -85,7 +143,7 @@ def gen_finger(obj, orig_bone_name):
# *** EDITMODE
# get assosiated data
obj, arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name)
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
@ -121,7 +179,7 @@ def gen_finger(obj, orig_bone_name):
driver_bone_pairs = []
for child_bone_name in children:
obj, arm, pbone_child, child_ebone = get_bone_data(obj, child_bone_name)
arm, pbone_child, child_ebone = get_bone_data(obj, child_bone_name)
# finger.02 --> finger_driver.02
driver_bone_name = child_bone_name.split('.')
@ -157,17 +215,17 @@ def gen_finger(obj, orig_bone_name):
bpy.ops.object.mode_set(mode='OBJECT')
obj, arm, orig_pbone, orig_bone = get_bone_data(obj, orig_bone_name)
obj, arm, control_pbone, control_bone= get_bone_data(obj, control_bone_name)
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
control_pbone["bend_ratio"] = 0.4
prop = rna_idprop_ui_prop_get(control_pbone, "bend_ratio", create=True)
prop["min"] = 0.0
prop["max"] = 1.0
prop["soft_min"] = 0.0
prop["soft_max"] = 1.0
con = orig_pbone.constraints.new('COPY_LOCATION')
con.target = obj
@ -191,7 +249,7 @@ def gen_finger(obj, orig_bone_name):
if i==2:
break
obj, arm, driver_pbone, driver_bone = get_bone_data(obj, driver_bone_name)
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)
@ -221,7 +279,7 @@ def gen_finger(obj, orig_bone_name):
elif i==1:
driver.expression = '(-scale+1.0)*pi*2.0*br'
obj, arm, child_pbone, child_bone = get_bone_data(obj, child_bone_name)
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)
@ -234,6 +292,8 @@ def gen_delta(obj, delta_name):
Use this bone to define a delta thats applied to its child in pose mode.
'''
arm = obj.data
mode_orig = obj.mode
bpy.ops.object.mode_set(mode='OBJECT')
@ -244,47 +304,75 @@ def gen_delta(obj, delta_name):
print("only 1 child supported for delta")
child_name = children[0].name
arm, child_pbone, child_bone = get_bone_data(obj, child_name)
delta_phead = delta_pbone.head.copy()
delta_ptail = delta_pbone.tail.copy()
delta_pmatrix = delta_pbone.matrix.copy()
child_phead = child_pbone.head.copy()
child_ptail = child_pbone.tail.copy()
child_pmatrix = child_pbone.matrix.copy()
delta_head = delta_pbone.head.copy()
delta_tail = delta_pbone.tail.copy()
delta_matrix = delta_pbone.matrix.copy()
children = delta_pbone.children
bpy.ops.object.mode_set(mode='EDIT')
arm = obj.data
# XXX -probably should allow via the UI
for ebone in arm.edit_bones:
ebone.selected = ebone.head_selected = ebone.tail_selected = False
# Select for deleting
delta_ebone = arm.edit_bones[delta_name]
delta_ebone.selected = delta_ebone.head_selected = delta_ebone.tail_selected = True
child_ebone = arm.edit_bones[child_name]
bpy.ops.armature.delete()
delta_head = delta_ebone.head.copy()
delta_tail = delta_ebone.tail.copy()
# arm, parent_pbone, parent_bone = get_bone_data(obj, delta_name)
child_head = child_ebone.head.copy()
child_tail = child_ebone.tail.copy()
arm.edit_bones.remove(delta_ebone)
del delta_ebone # cant use thz
bpy.ops.object.mode_set(mode='OBJECT')
# Move the child bone to the deltas location
obj.animation_data_create()
child_pbone = obj.pose[child_name]
child_pbone = obj.pose.bones[child_name]
# ------------------- drivers
fcurve_driver = child_pbone.driver_add("rotation_euler", 0)
#fcurve_driver = obj.animation_data.drivers[-1] # XXX, WATCH THIS
driver = fcurve_driver.driver
driver.type = 'AVERAGE'
mod = driver.modifiers.new('GENERATOR')
child_pbone.rotation_mode = 'XYZ'
rot = delta_pmatrix.invert().rotationPart() * child_pmatrix.rotationPart()
rot = rot.invert().toEuler()
fcurve_drivers = child_pbone.driver_add("rotation_euler", -1)
for i, fcurve_driver in enumerate(fcurve_drivers):
driver = fcurve_driver.driver
driver.type = 'AVERAGE'
#mod = fcurve_driver.modifiers.new('GENERATOR')
mod = fcurve_driver.modifiers[0]
mod.poly_order = 1
mod.coefficients[0] = rot[i]
mod.coefficients[1] = 0.0
# tricky, find the transform to drive the bone to this location.
delta_head_offset = child_pmatrix.rotationPart() * (delta_phead - child_phead)
fcurve_drivers = child_pbone.driver_add("location", -1)
for i, fcurve_driver in enumerate(fcurve_drivers):
driver = fcurve_driver.driver
driver.type = 'AVERAGE'
#mod = fcurve_driver.modifiers.new('GENERATOR')
mod = fcurve_driver.modifiers[0]
mod.poly_order = 1
mod.coefficients[0] = delta_head_offset[i]
mod.coefficients[1] = 0.0
obj, arm, parent_pbone, parent_bone = get_bone_data(obj, delta_name)
# arm, parent_pbone, parent_bone = get_bone_data(obj, delta_name)
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.object.mode_set(mode=mode_orig)
@ -293,6 +381,11 @@ def gen_arm(obj, orig_bone_name):
the bone with the 'arm' property is the upper arm, this assumes a chain as follows.
[shoulder, upper_arm, forearm, hand]
...where this bone is 'upper_arm'
there are 3 chains
- Original
- IK, MCH-%s_ik
- IKSwitch, MCH-%s ()
"""
def validate_chain():
@ -300,8 +393,8 @@ def gen_arm(obj, orig_bone_name):
Sanity check and return the arm as a list of bone names.
'''
# do a sanity check
obj, arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name)
shoulder_pbone = arm_pbone.parent
arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name)
shoulder_pbone = orig_pbone.parent
if not shoulder_pbone:
print("could not find 'arm' parent, skipping:", orig_bone_name)
@ -324,19 +417,162 @@ def gen_arm(obj, orig_bone_name):
return shoulder_pbone.name, orig_pbone.name, forearm_pbone.name, hand_pbone.name
shoulder_name, arm_name, forearm_name, hand_name = validate_chain()
arm = obj.data
original_chain_tuple = validate_chain()
shoulder_name, arm_name, forearm_name, hand_name = original_chain_tuple
obj, arm, hand_pbone, hand_ebone = get_bone_data(obj, hand_name)
# Add the edit bones
hand_ik_ebone = arm.edit_bones.new(hand_name + "_ik")
hand_ik_ebone.head = hand_ebone.head
hand_ik_ebone.tail = hand_ebone.tail
hand_ik_ebone.roll = hand_ebone.roll
def chain_ik(prefix="MCH-%s_ik"):
arm, arm_pbone, arm_ebone = get_bone_data(obj, arm_name)
arm, hand_pbone, hand_ebone = get_bone_data(obj, hand_name)
# Add the edit bones
hand_ik_ebone = copy_bone_simple(arm, hand_name, prefix % hand_name)
hand_ik_name = hand_ik_ebone.name
arm_ik_ebone = copy_bone_simple(arm, arm_name, prefix % arm_name)
arm_ik_name = arm_ik_ebone.name
forearm_ik_ebone = copy_bone_simple(arm, forearm_name, prefix % forearm_name)
forearm_ik_name = forearm_ik_ebone.name
arm_ik_ebone.parent = arm_ebone.parent
forearm_ik_ebone.connected = arm_ebone.connected
forearm_ik_ebone.parent = arm_ik_ebone
forearm_ik_ebone.connected = True
# Add the bone used for the arms poll target
pole_ik_name = add_pole_target_bone(obj, forearm_name, "elbow_poll", mode='+Z')
bpy.ops.object.mode_set(mode='OBJECT')
arm, forearm_ik_pbone, forearm_ik_bone = get_bone_data(obj, forearm_ik_name)
con = forearm_ik_pbone.constraints.new('IK')
con.target = obj
con.subtarget = hand_ik_name
con.pole_target = obj
con.pole_subtarget = pole_ik_name
con.use_tail = True
con.use_stretch = True
con.use_target = True
con.use_rotation = False
con.chain_length = 2
con.pole_angle = -90.0 # XXX, RAD2DEG
# ID Propery on the hand for IK/FK switch
arm, hand_ik_pbone, hand_ik_bone = get_bone_data(obj, hand_ik_name)
prop = rna_idprop_ui_prop_get(hand_ik_pbone, "ik", create=True)
hand_ik_pbone["ik"] = 0.5
prop["soft_min"] = 0.0
prop["soft_max"] = 1.0
bpy.ops.object.mode_set(mode='EDIT')
return None, arm_ik_name, forearm_ik_name, hand_ik_name, pole_ik_name
ik_chain_tuple = chain_ik()
def chain_switch(prefix="MCH-%s"):
arm_sw_ebone = copy_bone_simple(arm, arm_name, prefix % arm_name)
arm_sw_name = arm_sw_ebone.name
forearm_sw_ebone = copy_bone_simple(arm, forearm_name, prefix % forearm_name)
forearm_sw_name = forearm_sw_ebone.name
forearm_sw_ebone.parent = arm_sw_ebone
forearm_sw_ebone.connected = arm.edit_bones[forearm_name].connected
hand_sw_ebone = copy_bone_simple(arm, hand_name, prefix % hand_name)
hand_sw_name = hand_sw_ebone.name
hand_sw_ebone.parent = forearm_sw_ebone
hand_sw_ebone.connected = arm.edit_bones[hand_name].connected
bpy.ops.object.mode_set(mode='OBJECT')
# Add constraints
arm_sw_pbone = obj.pose.bones[arm_sw_name]
forearm_sw_pbone = obj.pose.bones[forearm_sw_name]
hand_sw_pbone = obj.pose.bones[hand_sw_name]
dummy, arm_ik_name, forearm_ik_name, hand_ik_name, pole_ik_name = ik_chain_tuple
ik_driver_path = obj.pose.bones[hand_ik_name].path_to_id() + '["ik"]'
def ik_fk_driver(con):
'''
3 bones use this for ik/fk switching
'''
fcurve = con.driver_add("influence", 0)
driver = fcurve.driver
tar = driver.targets.new()
driver.type = 'AVERAGE'
tar.name = "ik"
tar.id_type = 'OBJECT'
tar.id = obj
tar.rna_path = ik_driver_path
# ***********
con = arm_sw_pbone.constraints.new('COPY_ROTATION')
con.name = "FK"
con.target = obj
con.subtarget = arm_name
con = arm_sw_pbone.constraints.new('COPY_ROTATION')
con.target = obj
con.subtarget = arm_ik_name
con.influence = 0.5
ik_fk_driver(con)
# ***********
con = forearm_sw_pbone.constraints.new('COPY_ROTATION')
con.name = "FK"
con.target = obj
con.subtarget = forearm_name
con = forearm_sw_pbone.constraints.new('COPY_ROTATION')
con.name = "IK"
con.target = obj
con.subtarget = forearm_ik_name
con.influence = 0.5
ik_fk_driver(con)
# ***********
con = hand_sw_pbone.constraints.new('COPY_ROTATION')
con.name = "FK"
con.target = obj
con.subtarget = hand_name
con = hand_sw_pbone.constraints.new('COPY_ROTATION')
con.name = "IK"
con.target = obj
con.subtarget = hand_ik_name
con.influence = 0.5
ik_fk_driver(con)
add_stretch_to(obj, forearm_sw_name, pole_ik_name, "VIS-elbow_ik_poll")
add_stretch_to(obj, hand_sw_name, hand_ik_name, "VIS-hand_ik")
bpy.ops.object.mode_set(mode='EDIT')
return None, arm_sw_name, forearm_sw_name, hand_sw_name
switch_chain_tuple = chain_switch()
gen_table = {
"":gen_none, \
"finger":gen_finger, \
@ -344,7 +580,6 @@ gen_table = {
"arm":gen_arm, \
}
def generate_rig(context, ob):
# add_stretch_to(ob, "a", "b", "c")