def __create_soft_ik(self, ik_control):
"""Create the node network to allow soft ik
:param ik_control: Name of the ik control
:return: The attribute containing the percentage length from start joint to handle
that the ik should be placed
"""
cmds.addAttr(
ik_control,
ln="softIk",
minValue=0.0,
maxValue=1.0,
defaultValue=0.0,
keyable=True,
)
softik = dge("clamp(x, 0.001, 1)", x="{}.softIk".format(ik_control))
# We need to adjust how far the ik handle is from the start to create the soft
# effect
soft_ik_percentage = dge(
"x > (1.0 - softIk)"
"? (1.0 - softIk) + softIk * (1.0 - exp(-(x - (1.0 - softIk)) / softIk)) "
": x",
container="{}_softik".format(self.name),
x=self.percent_rest_distance,
softIk=softik,
)
return soft_ik_percentage
def test_cos(self):
loc = cmds.spaceLocator(name="cos")[0]
loc2 = cmds.spaceLocator()[0]
dge("y=cos(x)", x="{}.tx".format(loc), y="{}.ty".format(loc2))
for i in range(100):
v = -10.0 + 0.1 * i
cmds.setAttr("{}.tx".format(loc), v)
y = cmds.getAttr("{}.ty".format(loc2))
self.assertAlmostEquals(y, math.cos(v), places=5)
def test_sin(self):
loc = cmds.spaceLocator(name="sin")[0]
loc2 = cmds.spaceLocator()[0]
dge("y=sin(x)", x="{}.tx".format(loc), y="{}.ty".format(loc2))
for i in range(100):
v = -math.pi * 0.5 + 0.1 * i
cmds.setAttr("{}.tx".format(loc), v)
y = cmds.getAttr("{}.ty".format(loc2))
self.assertAlmostEquals(y, math.sin(v), places=5)
def test_acos(self):
loc = cmds.spaceLocator(name="acos")[0]
loc2 = cmds.spaceLocator()[0]
dge("y=acos(x)", x="{}.tx".format(loc), y="{}.ty".format(loc2))
for i in range(101):
v = -1.0 + 0.02 * i
cmds.setAttr("{}.tx".format(loc), v)
y = cmds.getAttr("{}.ty".format(loc2))
self.assertAlmostEquals(y, math.degrees(math.acos(v)), places=4)
def test_atan(self):
loc = cmds.spaceLocator(name="atan")[0]
loc2 = cmds.spaceLocator()[0]
dge("y=atan(x)", x="{}.tx".format(loc), y="{}.ty".format(loc2))
for i in range(100):
v = -5.0 + 0.1 * i
cmds.setAttr("{}.tx".format(loc), v)
y = cmds.getAttr("{}.ty".format(loc2))
self.assertAlmostEquals(y, math.degrees(math.atan(v)), places=5)
def test_tan(self):
loc = cmds.spaceLocator(name="tan")[0]
loc2 = cmds.spaceLocator()[0]
dge("y=tan(x)", x="{}.tx".format(loc), y="{}.ty".format(loc2))
v = -math.pi * 0.5 + 0.02
while v < math.pi * 0.5:
v += 0.02
cmds.setAttr("{}.tx".format(loc), v)
y = cmds.getAttr("{}.ty".format(loc2))
self.assertAlmostEquals(y, math.tan(v), places=1)
def test_abs(self):
loc = cmds.spaceLocator()[0]
dge("y=abs(x)", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 0.75)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 0.75)
cmds.setAttr("{}.tx".format(loc), -0.75)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 0.75)
def test_max(self):
loc = cmds.spaceLocator()[0]
dge("y=max(x, 2)", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 1)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 2)
cmds.setAttr("{}.tx".format(loc), 4)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 4)
def test_lerp(self):
loc = cmds.spaceLocator()[0]
dge("y=lerp(4, 8, x)", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 1)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 8)
cmds.setAttr("{}.tx".format(loc), 0)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 4)
cmds.setAttr("{}.tx".format(loc), 0.25)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 5)
def test_add_two_attrs(self):
loc = cmds.spaceLocator()[0]
result = dge("x+x", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 10.0)
def test_exp(self):
loc = cmds.spaceLocator()[0]
result = dge("exp(x)", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, math.exp(5), places=3)
def test_pow(self):
loc = cmds.spaceLocator()[0]
result = dge("x^2", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 25)
def test_distance(self):
loc = cmds.spaceLocator()[0]
loc2 = cmds.spaceLocator()[0]
cmds.setAttr("{}.tx".format(loc), 2.5)
result = dge("distance(i, j)", container="mydistance", i=loc, j=loc2)
d = cmds.getAttr(result)
self.assertAlmostEquals(d, 2.5)
def test_parentheses(self):
loc = cmds.spaceLocator()[0]
result = dge("(x+3)*(2+x)", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 56.0)
def test_subtract_1_to_3(self):
loc = cmds.spaceLocator()[0]
result = dge("3-x", x="{}.t".format(loc))
cmds.connectAttr(result, "{}.r".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.rx".format(loc))
self.assertAlmostEquals(y, -2.0, places=6)
def test_add_3_to_1(self):
loc = cmds.spaceLocator()[0]
result = dge("x+3", x="{}.t".format(loc))
cmds.connectAttr(result, "{}.r".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.rx".format(loc))
self.assertAlmostEquals(y, 8.0, places=6)
def test_two_op_add_subtract(self):
loc = cmds.spaceLocator()[0]
result = dge("x+3-y", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.connectAttr(result, "{}.tz".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
cmds.setAttr("{}.ty".format(loc), 2)
z = cmds.getAttr("{}.tz".format(loc))
self.assertAlmostEquals(z, 6.0)
def test_ternary_is_equal(self):
loc = cmds.spaceLocator()[0]
result = dge("x == 1 ? x : 4", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 4)
cmds.setAttr("{}.tx".format(loc), 1)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 1)
def test_ternary_with_function(self):
loc = cmds.spaceLocator()[0]
result = dge("x < 1 ? x : exp(x)", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, math.exp(5), places=3)
cmds.setAttr("{}.tx".format(loc), 0)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 0)
def test_reuse_nodes(self):
loc = cmds.spaceLocator()[0]
result = dge("y=(1-x)*(1-x)+(1-x)",
x="{}.tx".format(loc),
y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 12)
pma = cmds.ls(type="plusMinusAverage")
self.assertEqual(len(pma), 2)
def test_clamp(self):
loc = cmds.spaceLocator()[0]
result = dge("clamp(x, 0, 5)", x="{}.tx".format(loc))
cmds.connectAttr(result, "{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 6)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 5.0)
cmds.setAttr("{}.tx".format(loc), -1)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 0.0)
cmds.setAttr("{}.tx".format(loc), 1)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 1.0)
def __create_ik(self, ik_control, pole_vector, soft_ik_parent,
global_scale_attr, scale_stretch):
self.ik_handle = cmds.ikHandle(
name="{}_ikh".format(self.name),
solver="ikRPsolver",
startJoint=self.start_joint,
endEffector=self.end_joint,
)[0]
cmds.setAttr("{}.v".format(self.ik_handle), 0)
# Drive visibility
ik_vis = dge("1.0 - ikFk", ikFk="{}.ikFk".format(self.config_control))
for node in [ik_control, pole_vector]:
vis = "{}.v".format(node)
locked = cmds.getAttr(vis, lock=True)
cmds.setAttr(vis, lock=False)
cmds.connectAttr(ik_vis, "{}.v".format(node))
if locked:
cmds.setAttr(vis, lock=True)
dge(
"ikBlend = 1.0 - ikFk",
ikBlend="{}.ikBlend".format(self.ik_handle),
ikFk="{}.ikFk".format(self.config_control),
)
self.soft_ik = cmds.createNode("transform",
name="{}_soft_ik".format(self.name))
common.snap_to_position(self.soft_ik, self.end_joint)
cmds.parent(self.ik_handle, self.soft_ik)
cmds.parent(self.soft_ik, soft_ik_parent)
self.__create_stretch(ik_control, global_scale_attr, scale_stretch)
cmds.parent(self.end_loc, soft_ik_parent)
cmds.poleVectorConstraint(pole_vector, self.ik_handle)
def create(self, global_scale_attr=None):
cmds.addAttr(
self.end_control,
ln="stretch",
minValue=0.0,
maxValue=1.0,
defaultValue=0.0,
keyable=True,
)
self.spline_chain, original_chain = common.duplicate_chain(
self.start_joint, self.end_joint, prefix="ikSpine_")
# Create the spline ik
self.ik_handle, self.effector, self.curve = cmds.ikHandle(
name="{}_ikh".format(self.name),
solver="ikSplineSolver",
startJoint=self.spline_chain[0],
endEffector=self.spline_chain[-1],
parentCurve=False,
simplifyCurve=False,
)
self.effector = cmds.rename(self.effector, "{}_eff".format(self.name))
self.curve = cmds.rename(self.curve, "{}_crv".format(self.name))
# Create the joints to skin the curve
curve_start_joint = cmds.duplicate(self.start_joint,
parentOnly=True,
name="{}CurveStart_jnt".format(
self.name))[0]
start_parent = cmds.listRelatives(self.start_control,
parent=True,
path=True)
if start_parent:
cmds.parent(curve_start_joint, start_parent[0])
common.opm_point_constraint(self.start_control, curve_start_joint)
curve_end_joint = cmds.duplicate(self.end_joint,
parentOnly=True,
name="{}CurveEnd_jnt".format(
self.name))[0]
cmds.parent(curve_end_joint, self.end_control)
for node in [curve_start_joint, curve_end_joint]:
cmds.setAttr("{}.v".format(node), 0)
# Skin curve
cmds.skinCluster(
curve_start_joint,
curve_end_joint,
self.curve,
name="{}_scl".format(self.name),
tsb=True,
)
# Create stretch network
curve_info = cmds.arclen(self.curve, constructionHistory=True)
scale = dge(
"lerp(1, arclength / (restLength * globalScale), stretch)",
container="{}_stretch_scale".format(self.name),
arclength="{}.arcLength".format(curve_info),
restLength=cmds.getAttr("{}.arcLength".format(curve_info)),
globalScale=global_scale_attr or 1.0,
stretch="{}.stretch".format(self.end_control),
)
# Connect to joints
for joint in self.spline_chain[1:]:
tx = cmds.getAttr("{}.translateX".format(joint))
mdl = cmds.createNode("multDoubleLinear",
name="{}Stretch_mdl".format(joint))
cmds.setAttr("{}.input1".format(mdl), tx)
cmds.connectAttr(scale, "{}.input2".format(mdl))
cmds.connectAttr("{}.output".format(mdl),
"{}.translateX".format(joint))
joint_up = OpenMaya.MVector(0.0, 1.0, 0.0)
start_joint_path = shortcuts.get_dag_path2(self.start_joint)
start_control_path = shortcuts.get_dag_path2(self.start_control)
up_vector_start = (joint_up * start_joint_path.inclusiveMatrix() *
start_control_path.inclusiveMatrixInverse())
end_joint_path = shortcuts.get_dag_path2(self.end_joint)
end_control_path = shortcuts.get_dag_path2(self.end_control)
up_vector_end = (joint_up * end_joint_path.inclusiveMatrix() *
end_control_path.inclusiveMatrixInverse())
# Setup advanced twist
cmds.setAttr("{}.dTwistControlEnable".format(self.ik_handle), True)
cmds.setAttr("{}.dWorldUpType".format(self.ik_handle), 4) # Object up
cmds.setAttr("{}.dWorldUpAxis".format(self.ik_handle),
0) # Positive Y Up
cmds.setAttr("{}.dWorldUpVectorX".format(self.ik_handle),
up_vector_start.x)
cmds.setAttr("{}.dWorldUpVectorY".format(self.ik_handle),
up_vector_start.y)
cmds.setAttr("{}.dWorldUpVectorZ".format(self.ik_handle),
up_vector_start.z)
cmds.setAttr("{}.dWorldUpVectorEndX".format(self.ik_handle),
up_vector_end.x)
cmds.setAttr("{}.dWorldUpVectorEndY".format(self.ik_handle),
up_vector_end.y)
cmds.setAttr("{}.dWorldUpVectorEndZ".format(self.ik_handle),
up_vector_end.z)
cmds.connectAttr(
"{}.worldMatrix[0]".format(self.start_control),
"{}.dWorldUpMatrix".format(self.ik_handle),
)
cmds.connectAttr(
"{}.worldMatrix[0]".format(self.end_control),
"{}.dWorldUpMatrixEnd".format(self.ik_handle),
)
# Constrain original chain back to spline chain
for ik_joint, joint in zip(self.spline_chain, original_chain):
if joint == self.end_joint:
cmds.pointConstraint(ik_joint, joint, mo=True)
cmds.orientConstraint(self.end_control, joint, mo=True)
elif joint == self.start_joint:
cmds.parentConstraint(self.start_control, joint, mo=True)
else:
cmds.parentConstraint(ik_joint, joint)
def __create_fk(self, parent):
for name, joint in [
("start_fk_control", self.start_joint),
("mid_fk_control", self.mid_joint),
("end_fk_control", self.end_joint),
]:
control = cmds.createNode("transform",
name="{}_fk_ctrl".format(joint))
common.snap_to(control, joint)
common.lock_and_hide(control, "sv")
setattr(self, name, control)
if parent:
cmds.parent(control, parent)
common.freeze_to_parent_offset(control)
parent = control
ori = cmds.orientConstraint(control, joint)[0]
cmds.connectAttr("{}.ikFk".format(self.config_control),
"{}.{}W0".format(ori, control))
# Drive visibility
visibility = "{}.v".format(control)
locked = cmds.getAttr(visibility, lock=True)
cmds.setAttr(visibility, lock=False)
cmds.connectAttr("{}.ikFk".format(self.config_control), visibility)
if locked:
cmds.setAttr(visibility, lock=True)
for joint, node in [
(self.start_joint, self.start_fk_control),
(self.mid_joint, self.mid_fk_control),
]:
cmds.addAttr(node,
ln="length",
minValue=0,
defaultValue=1,
keyable=True)
scale = cmds.listConnections("{}.sx".format(joint),
d=False,
plugs=True)[0]
dge(
"sx = lerp(scale, length, ikFk)",
sx="{}.sx".format(joint),
scale=scale,
length="{}.length".format(node),
ikFk="{}.ikFk".format(self.config_control),
)
for control in [self.mid_fk_control, self.end_fk_control]:
parent_control = cmds.listRelatives(control,
parent=True,
path=True)[0]
compose = cmds.createNode("composeMatrix")
offset = common.local_offset(control)
dge(
"x = (length - 1.0) * tx",
container="{}_length_offset".format(control),
x="{}.inputTranslateX".format(compose),
length="{}.length".format(parent_control),
tx=offset.getElement(3, 0),
)
mult = cmds.createNode("multMatrix")
cmds.connectAttr("{}.outputMatrix".format(compose),
"{}.matrixIn[0]".format(mult))
cmds.setAttr(
"{}.matrixIn[1]".format(mult),
cmds.getAttr("{}.offsetParentMatrix".format(control)),
type="matrix",
)
cmds.connectAttr(
"{}.matrixSum".format(mult),
"{}.offsetParentMatrix".format(control),
)
def __create_stretch(self,
ik_control,
global_scale_attr=None,
scale_stretch=True):
"""Create the stretchy soft ik setup.
:param ik_control: Name of the node to use as the ik control.
:param global_scale_attr: Optional attribute containing global scale value.
:param scale_stretch: True to stretch with scale, False to use translate.
"""
for attr in ["stretch", "softIk"]:
cmds.addAttr(
ik_control,
ln=attr,
minValue=0.0,
maxValue=1.0,
defaultValue=0.0,
keyable=True,
)
# Locator for start distance measurement
self.start_loc = cmds.spaceLocator(
name="{}_stretch_start".format(self.name))[0]
parent = cmds.listRelatives(self.start_joint, parent=True, path=True)
if parent:
cmds.connectAttr(
"{}.worldMatrix[0]".format(parent[0]),
"{}.offsetParentMatrix".format(self.start_loc),
)
common.snap_to_position(self.start_loc, self.start_joint)
# Locator for end distance measurement
self.end_loc = cmds.spaceLocator(
name="{}_stretch_end".format(self.name))[0]
cmds.setAttr("{}.v".format(self.end_loc), 0)
common.snap_to_position(self.end_loc, self.end_joint)
rest_length = shortcuts.distance(self.start_joint, self.mid_joint)
rest_length += shortcuts.distance(self.mid_joint, self.end_joint)
length_ratio = dge(
"distance(start, end) / (restLength * globalScale)",
container="{}_percent_from_rest".format(self.name),
start=self.start_loc,
end=self.end_loc,
restLength=rest_length,
globalScale=global_scale_attr or 1.0,
)
# Prevent divide by 0
softik = dge("max(x, 0.001)", x="{}.softIk".format(ik_control))
# We need to adjust offset the ik handle and scale the joints to create the soft
# effect
# See this graph to see the the softIk and scale values plotted
# https://www.desmos.com/calculator/csi40rsztl
# x = length_ratio
# f(x) = softik_scale
# c(x) = Scale x of the joints
# s = softIk attribute
# t = stretch attribute
softik_scale = dge(
"x > (1.0 - softIk)"
"? (1.0 - softIk) + softIk * (1.0 - exp(-(x - (1.0 - softIk)) / softIk)) "
": x",
container="{}_softik".format(self.name),
x=length_ratio,
softIk=softik,
)
compose_matrix = cmds.createNode("composeMatrix")
# Set the effector position
dge(
"tx = restLength * lerp(softIk, lengthRatio, stretch)",
container="{}_effector_position".format(self.name),
tx="{}.inputTranslate.inputTranslateX".format(compose_matrix),
restLength=rest_length,
lengthRatio=length_ratio,
softIk=softik_scale,
stretch="{}.stretch".format(ik_control),
)
# Drive the joint scale for stretch
scale = dge(
"lerp(1, lengthRatio / softIk, stretch)",
container="{}_stretch_scale".format(self.name),
lengthRatio=length_ratio,
softIk=softik_scale,
stretch="{}.stretch".format(ik_control),
)
if scale_stretch:
for node in [self.start_joint, self.mid_joint]:
cmds.connectAttr(scale, "{}.sx".format(node))
inverse_scale = dge("1/sx", sx="{}.sx".format(node))
cmds.connectAttr(inverse_scale, "{}.sy".format(node))
cmds.connectAttr(inverse_scale, "{}.sz".format(node))
else:
for node in [self.mid_joint, self.end_joint]:
tx = cmds.getAttr("{}.tx".format(node))
dge("x = {} * s".format(tx), x="{}.tx".format(node), s=scale)
# Drive the soft ik transform
aim = cmds.createNode("aimMatrix")
cmds.connectAttr("{}.worldMatrix[0]".format(self.start_loc),
"{}.inputMatrix".format(aim))
cmds.connectAttr(
"{}.worldMatrix[0]".format(self.end_loc),
"{}.primary.primaryTargetMatrix".format(aim),
)
mult = cmds.createNode("multMatrix")
cmds.connectAttr("{}.outputMatrix".format(compose_matrix),
"{}.matrixIn[0]".format(mult))
cmds.connectAttr("{}.outputMatrix".format(aim),
"{}.matrixIn[1]".format(mult))
parent = cmds.listRelatives(self.soft_ik, parent=True, path=True)[0]
if parent:
cmds.connectAttr("{}.worldInverseMatrix[0]".format(parent),
"{}.matrixIn[2]".format(mult))
pick = cmds.createNode("pickMatrix")
cmds.connectAttr("{}.matrixSum".format(mult),
"{}.inputMatrix".format(pick))
for attr in ["Scale", "Shear", "Rotate"]:
cmds.setAttr("{}.use{}".format(pick, attr), 0)
cmds.connectAttr("{}.outputMatrix".format(pick),
"{}.offsetParentMatrix".format(self.soft_ik))
cmds.setAttr("{}.t".format(self.soft_ik), 0, 0, 0)
def test_sqrt(self):
loc = cmds.spaceLocator()[0]
dge("y=sqrt(x)", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 10.2)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, math.sqrt(10.2), places=5)
def create_space_switch(node,
drivers,
switch_attribute=None,
use_translate=True,
use_rotate=True):
"""Creates a space switch network.
The network uses the offsetParentMatrix attribute and does not create any
constraints or new dag nodes.
:param node: Transform to drive
:param drivers: List of tuples: [(driver1, "spaceName1"), (driver2, "spaceName2")]
:param switch_attribute: Name of the switch attribute to create on the target node.
"""
if switch_attribute is None:
switch_attribute = "space"
if cmds.objExists("{}.{}".format(node, switch_attribute)):
cmds.deleteAttr(node, at=switch_attribute)
names = [d[1] for d in drivers]
cmds.addAttr(node,
ln=switch_attribute,
at="enum",
en=":".join(names),
keyable=True)
# Create attribute to toggle translation in the matrices
enable_translate_attr = _create_bool_attribute(
node, "{}UseTranslate".format(switch_attribute), use_translate)
# Create attribute to toggle rotation in the matrices
enable_rotate_attr = _create_bool_attribute(
node, "{}UseRotate".format(switch_attribute), use_rotate)
blend = cmds.createNode("blendMatrix", name="{}_spaceswitch".format(node))
# Get the current offset parent matrix. This is used as the starting blend point
m = OpenMaya.MMatrix(cmds.getAttr("{}.offsetParentMatrix".format(node)))
cmds.setAttr("{}.inputMatrix".format(blend), list(m), type="matrix")
parent = cmds.listRelatives(node, parent=True, path=True)
to_parent_local = "{}.worldInverseMatrix[0]".format(
parent[0]) if parent else None
for i, driver in enumerate(drivers):
driver = driver[0]
_connect_driver_matrix_network(blend, node, driver, i, to_parent_local)
target_attr = "{}.target[{}]".format(blend, i)
# Hook up the weight toggle when switching spaces
dge(
"x = switch == {} ? 1 : 0".format(i),
x="{}.weight".format(target_attr),
switch="{}.{}".format(node, switch_attribute),
)
# Connect the translation, rotation toggles
cmds.connectAttr(enable_translate_attr,
"{}.useTranslate".format(target_attr))
cmds.connectAttr(enable_rotate_attr,
"{}.useRotate".format(target_attr, i))
cmds.connectAttr("{}.outputMatrix".format(blend),
"{}.offsetParentMatrix".format(node))
def test_assignment(self):
loc = cmds.spaceLocator()[0]
result = dge("y=x^2", x="{}.tx".format(loc), y="{}.ty".format(loc))
cmds.setAttr("{}.tx".format(loc), 5)
y = cmds.getAttr("{}.ty".format(loc))
self.assertAlmostEquals(y, 25)