def create_skincluster_backup(shape, skin_node):
""" Creates a skinning backup object
:param shape: the shape node you want to duplicate (should use orig shape)
:type shape: str
:param skin_node: the given shape skin cluster node
:type skin_node: str
:return: the skin cluster node backup
:rtype: str
"""
logger.info("Creating skin backup for {}".format(skin_node))
# gets the skin cluster influences
influences = cmds.listConnections("{}.matrix".format(skin_node))
# creates a duplicate shape of the given shape
holder_name = "{}_flex_skin_shape_holder".format(
get_prefix_less_name(shape))
shape_duplicate = create_duplicate(shape, holder_name)
# creates new skin cluster node on duplicate
skin_holder = cmds.skinCluster(influences, shape_duplicate, bindMethod=0,
obeyMaxInfluences=False, skinMethod=0,
weightDistribution=0, normalizeWeights=1,
removeUnusedInfluence=False, name="{}_SKN"
.format(holder_name))
# copy the given skin node weights to back up shape
copy_skin_weights(skin_node, skin_holder[0])
return ["{}".format(skin_holder[0])]
def copy_cluster_weights(shape, weight_file, method="bilinear"):
""" Copy cluster weights to the given shape from the given weight files
:param shape: the shape node name containing the cluster deformers
:type shape: str
:param weight_file: containing the deformers and weight filter names
:type weight_file: dict
:param method: method type that should be used when updating the weights
:type method: str
"""
# gets the temporary folder path
temp_path = get_temp_folder()
short_name = get_prefix_less_name(shape)
for node in weight_file:
if not weight_file[node]:
continue
cmds.deformerWeights(weight_file[node],
im=True,
shape=short_name,
deformer=node,
path=temp_path,
method=method,
vertexConnections=True)
def create_clusters_backup(shape, nodes):
""" Generates weight files for the given cluster nodes in the given shape
:param shape: the shape node name containing the cluster deformers nodes
:type shape: str
:param nodes: the cluster nodes
:type nodes: list
:return: cluster weight files names
:rtype: dict
"""
logger.info("Creating cluster weights backup for {}".format(nodes))
# gets the temp folder path
temp_path = get_temp_folder()
# prefix less shape name
shape = get_prefix_less_name(shape)
# dict for weights files
weight_files = {}
for node in nodes:
# If there is not weights creating the deformer maps is useless
try:
cmds.getAttr("{}.weightList[0].weights".format(node))
except RuntimeError:
weight_files[node] = None
continue
# Creates the weight map if weights are found on shape points
cmds.deformerWeights('{}_{}.xml'.format(shape, node),
export=True,
vertexConnections=True,
weightPrecision=5,
shape=shape,
deformer=node,
path=temp_path)
weight_files[node] = '{}_{}.xml'.format(shape, node)
return weight_files
def create_blendshapes_backup(source, target, nodes):
""" Creates an updated backup for the given blendshapes nodes on source
.. important:: This method does not work as the other source/target type
of methods in flex. The source is the current geometry
before topology update containing the blendshape nodes.
We use it in order to create a wrap to the newer target
geometry topology.
:param source: current shape node
:type source: str
:param target: new shape node
:type target: str
:return: backup blendshape nodes
:rtype: list
"""
logger.debug("Creating blendshapes backup")
# gets simpler shape name
shape_name = get_prefix_less_name(target)
# get attributes types
attrs = get_shape_type_attributes(target)
# creates source duplicate
intermediate = get_shape_orig(source)[0]
source_duplicate = create_duplicate(intermediate, "{}_flex_bs_sourceShape"
.format(shape_name))
# first loops to create a clean copy of the blendshape nodes
nodes_copy = []
for node in nodes:
duplicate = copy_blendshape_node(node, source_duplicate)
if duplicate:
nodes_copy.append(duplicate)
# creates wrapped target shape
warp_target = create_duplicate(target, "{}_flex_bs_warpShape"
.format(shape_name))
# wraps the duplicate to the source
create_wrap(source_duplicate, warp_target)
# creates blendshape target shape
target_duplicate = create_duplicate(target, "{}_flex_bs_targetShape"
.format(shape_name))
return_nodes = []
# loops on the blendshape nodes
for node in nodes_copy:
# creates transfer blendshape
transfer_node = cmds.deformer(target_duplicate, type="blendShape",
name="flex_transfer_{}".format(node))[0]
# get blendshape targets indices. We skip verification because at this
# stage the copied blendshapes nodes will always have targets
targets_idx = cmds.getAttr("{}.weight".format(node), multiIndices=True)
# loop on blendshape targets indices
for idx in targets_idx or []:
# input target group attribute
attr_name = (BLENDSHAPE_TARGET.format(node, idx))
# blendshape target name
target_name = cmds.aliasAttr("{}.weight[{}]".format(node, idx),
query=True)
# loop on actual targets and in-between targets
for target in cmds.getAttr(attr_name, multiIndices=True):
# gets and sets the blendshape weight value
weight = float((target - 5000) / 1000.0)
cmds.setAttr("{}.weight[{}]".format(node, idx), weight)
# geometry target attribute
geometry_target_attr = "{}[{}].inputGeomTarget".format(
attr_name, target)
shape_target = geometry_target_attr.replace(
geometry_target_attr.split(".")[0], transfer_node)
# updates the target
cmds.connectAttr("{}.{}".format(warp_target, attrs["output"]),
shape_target, force=True)
cmds.disconnectAttr("{}.{}"
.format(warp_target, attrs["output"]),
shape_target)
cmds.setAttr("{}.weight[{}]".format(node, idx), 0)
cmds.setAttr("{}.weight[{}]".format(transfer_node, idx), 0)
if target_name:
cmds.aliasAttr(target_name, "{}.weight[{}]".format(
transfer_node, idx))
# adds blendshape node to nodes to return
return_nodes.append("{}".format(transfer_node))
# deletes backup process shapes
cmds.delete(cmds.listRelatives(source_duplicate, parent=True),
cmds.listRelatives(warp_target, parent=True))
# forces refresh
cmds.refresh()
return return_nodes
