skinPercent

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Synopsis

skinPercent( [object] [selectionList] , [ignoreBelow=float], [normalize=boolean], [pruneWeights=float], [relative=boolean], [resetToDefault=boolean], [transform=string], [transformMoveWeights=string], [transformValue=[string, float]], [value=boolean], [zeroRemainingInfluences=boolean])

Note: Strings representing object names and arguments must be separated by commas. This is not depicted in the synopsis.

skinPercent is undoable, queryable, and NOT editable.

Note that setting multiple weights in a single invocation of this command is far more efficient than calling it once per weighted vertex.

Return value

None

In query mode, return type is based on queried flag.

Related

Flags

Long name (short name)	Argument types	Properties
ignoreBelow(ib)	float
Limits the output of the -value and -transform queries to the entries whose weight values are over the specified limit. This flag has to be used before the -query flag. In query mode, this flag needs a value.
normalize(nrm)	boolean
If set, the weights not assigned by the -transformValue flag are normalized so that the sum of the all weights for the selected object component add up to 1. The default is on. NOTE: The skinCluster has a normalizeWeights attribute which when set to OFF overrides this attribute! If the skinCluster.normalizeWeights attribute is OFF, you must set it to Interactive in order to normalize weights using the skinPercent command.
pruneWeights(prw)	float
Sets to zero any weight smaller than the given value for all the selected components. To use this command to set all the weights to zero, you must turn the -normalize flag "off" or the skinCluster node will normalize the weights to sum to one after pruning them. Weights for influences with a true value on their "Hold Weights" attribute will not be pruned.
relative(r)	boolean
Used with -transformValue to specify a relative setting of values. If -relative is true, the value passed to -tv is added to the previous value. Otherwise, it replaces the previous value.
resetToDefault(rtd)	boolean
Sets the weights of the selected components to their default values, overwriting any custom weights.
transform(t)	string
If used after the -query flag (without an argument) the command returns an array of strings corresponding to the names of the transforms influencing the selected object components. If used before the -query flag (with a transform name), the command returns the weight of the selected object component corresponding to the given transform. The command will return an average weight if several components have been selected. In query mode, this flag can accept a value.
transformMoveWeights(tmw)	string
This flag is used to transfer weights from a source influence to one or more target influences. It acts on the selected vertices. The flag must be used at least twice to generate a valid command. The first flag usage indicates the source influence from which the weights will be copied. Subsequent flag usages indicate the target influences.
transformValue(tv)	[string, float]
Accepts a pair consisting of a transform name and a value and assigns that value as the weight of the selected object components corresponding to the given transform.
value(v)	boolean
Returns an array of doubles corresponding to the joint weights for the selected object component.
zeroRemainingInfluences(zri)	boolean
If set, the weights not assigned by the -transformValue flag are set to 0. The default is off.

Flag can appear in Create mode of command	Flag can appear in Edit mode of command
Flag can appear in Query mode of command	Flag can have multiple arguments, passed either as a tuple or a list.

Python examples

import maya.cmds as cmds

# Create a joint chain and a polygonal plane and bind them as skin
cmds.select(d=True)
cmds.joint(p=(-3.0, 0.0,-12.0))
cmds.joint(p=(-3.0, 0.0, -5.0))
cmds.joint(p=(1.0, 0.0, 5.5))
cmds.joint(p=(6.0, 0.0, 10.0))
cmds.polyPlane(w=20.0,h=20.0,sx=25,sy=25)
cmds.skinCluster( 'joint1', 'pPlane1' )

# For vtx[100], set the weight wrt joint1 to 0.2, the weight
# wrt joint3 to 0.8 and adjust the remaining weights to keep
# the overall weight normalized (i.e. set all other joints to zero,
# since the weights we are setting sum to 1.0)
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', transformValue=[('joint1', 0.2), ('joint3', 0.8)])

# Get the weight values corresponding to all of the influences
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', query=True, value=True )

# Get the weight values that are above 0.5
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', ignoreBelow=0.5, query=True, value=True )

# Get the weight of vtx[100] corresponding to joint1
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', transform='joint1', query=True )

# Normalize the existing weights for vtx[100]
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', normalize=True )

# Reset the weights for vtx[100] to their default values
#
cmds.skinPercent( 'skinCluster1', 'pPlane1.vtx[100]', resetToDefault=True )

# Zero all the weights that are below 0.1
#
cmds.skinPercent( 'skinCluster1', 'pPlane1', pruneWeights=0.1 )

# Zero all the weights
#
cmds.skinPercent( 'skinCluster1', 'pPlane1', pruneWeights=100, normalize=False )

# Assign weights to a large number of vertices,
# several at a time to reduce the number of calls
# to the skinPercent command.
#
for i in range(0,675,10):
   cmds.select('pPlane1.vtx[%i]' % i,'pPlane1.vtx[%i]' % (i+1), 'pPlane1.vtx[%i]' % (i+2), 'pPlane1.vtx[%i]' % (i+3), 'pPlane1.vtx[%i]' % (i+4), 'pPlane1.vtx[%i]' % (i+5), 'pPlane1.vtx[%i]' % (i+6), 'pPlane1.vtx[%i]' % (i+7), 'pPlane1.vtx[%i]' % (i+8), 'pPlane1.vtx[%i]' % (i+9))
   cmds.skinPercent( 'skinCluster1',transformValue=[('joint1', 0.5),('joint2', 0.5)] )