pymel.core.animation.blendShape

blendShape(*args, **kwargs)

This command creates a blendShape deformer, which blends in specified amounts of each target shape to the initial base shape. Each base shape is deformed by its own set of target shapes. Every target shape has an index that associates it with one of the shape weight values.In the create mode the first item on the selection list is treated as the base and the remaining inputs as targets. If the first item on the list has multiple shapes grouped beneath it, the targets must have an identical shape hierarchy. Additional base shapes can be added in edit mode using the deformers -g flag.

Flags:

Long Name / Short Name Argument Types Properties
after / af bool ../../../_images/create.gif ../../../_images/edit.gif
  If the default behavior for insertion/appending into/onto the existing chain is not the desired behavior then this flag can be used to force the command to place the deformer node after the selected node in the chain even if a new geometry shape has to be created in order to do so. Works in create mode (and edit mode if the deformer has no geometry added yet).
afterReference / ar bool ../../../_images/create.gif ../../../_images/edit.gif
  The -afterReference flag is used to specify deformer ordering in a hybrid way that choses between -before and -after automatically. If the geometry being deformed is referenced then the -after mode is used when adding the new deformer, otherwise the -before mode is used. The net effect when using -afterReference to build deformer chains is that internal shape nodes in the deformer chain will only appear at reference file boundaries, leading to lightweight deformer networks that may be more amicable to reference swapping.
before / bf bool ../../../_images/create.gif ../../../_images/edit.gif
  If the default behavior for insertion/appending into/onto the existing chain is not the desired behavior then this flag can be used to force the command to place the deformer node before the selected node in the chain even if a new geometry shape has to be created in order to do so. Works in create mode (and edit mode if the deformer has no geometry added yet).
copyDelta / cd int, int, int  
   
deformerTools / dt bool ../../../_images/query.gif
  Returns the name of the deformer tool objects (if any) as string string ...
envelope / en float ../../../_images/create.gif ../../../_images/query.gif ../../../_images/edit.gif
  Set the envelope value for the deformer, controlling how much of the total deformation gets applied. Default is 1.0.
exclusive / ex unicode ../../../_images/create.gif ../../../_images/query.gif
  Puts the deformation set in a deform partition.
export / ep unicode  
   
exportTarget / et int, int  
   
flipTarget / ft int, int  
   
frontOfChain / foc bool ../../../_images/create.gif ../../../_images/edit.gif
  This command is used to specify that the new deformer node should be placed ahead (upstream) of existing deformer and skin nodes in the shape’s history (but not ahead of existing tweak nodes). The input to the deformer will be the upstream shape rather than the visible downstream shape, so the behavior of this flag is the most intuitive if the downstream deformers are in their reset (hasNoEffect) position when the new deformer is added. Works in create mode (and edit mode if the deformer has no geometry added yet).
geometry / g unicode ../../../_images/query.gif ../../../_images/edit.gif
  The specified object will be added to the list of objects being deformed by this deformer object, unless the -rm flag is also specified. When queried, this flag returns string string string ...
geometryIndices / gi bool ../../../_images/query.gif
  Complements the -geometry flag in query mode. Returns the multi index of each geometry.
ignoreSelected / ignoreSelected bool ../../../_images/create.gif
  Tells the command to not deform objects on the current selection list
inBetween / ib bool ../../../_images/create.gif ../../../_images/edit.gif
  Indicate that the specified target should serve as an inbetween. An inbetween target is one that serves as an intermediate target between the base shape and another target.
inBetweenIndex / ibi int ../../../_images/edit.gif
  Only used with the -rtd/-resetTargetDelta flag to remove delta values for points in the inbetween target geometry defined by this index.
inBetweenType / ibt unicode ../../../_images/create.gif ../../../_images/edit.gif
  Specify if the in-between target to be created is relative to the hero target or if it is absolute. If it is relative to hero targets, the in-between target will get any changes made to the hero target. Valid values are relativeand absolute. This flag should always be used with the -ib/-inBetween and -t/-target flags.
includeHiddenSelections / ihs bool ../../../_images/create.gif
  Apply the deformer to any visible and hidden objects in the selection list. Default is false.
ip / ip unicode  
   
mirrorDirection / md int  
   
mirrorTarget / mt int, int  
   
name / n unicode ../../../_images/create.gif
  Used to specify the name of the node being created.
normalizationGroups / ng bool ../../../_images/query.gif
  Returns a list of the used normalization group IDs.
origin / o unicode ../../../_images/create.gif
  blendShape will be performed with respect to the world by default. Valid values are worldand local. The local flag will cause the blend shape to be performed with respect to the shape’s local origin.
parallel / par bool ../../../_images/create.gif ../../../_images/edit.gif
  Inserts the new deformer in a parallel chain to any existing deformers in the history of the object. A blendShape is inserted to blend the parallel results together. Works in create mode (and edit mode if the deformer has no geometry added yet).
prune / pr bool ../../../_images/edit.gif
  Removes any points not being deformed by the deformer in its current configuration from the deformer set.
remove / rm bool ../../../_images/edit.gif
  Specifies that objects listed after the -g flag should be removed from this deformer.
resetTargetDelta / rtd int, int ../../../_images/edit.gif
  Remove all delta values for points in the target geometry, including all sequential targets defined by target index. Parameter list: uint: the base object indexuint: the target index
split / sp bool ../../../_images/create.gif ../../../_images/edit.gif
  Branches off a new chain in the dependency graph instead of inserting/appending the deformer into/onto an existing chain. Works in create mode (and edit mode if the deformer has no geometry added yet).
symmetryAxis / sa unicode  
   
symmetryEdge / se unicode  
   
symmetrySpace / ss int  
   
tangentSpace / ts bool ../../../_images/create.gif ../../../_images/edit.gif
  Indicate that the delta of the specified target should be relative to the tangent space of the surface.
target / t unicode, int, unicode, float ../../../_images/create.gif ../../../_images/query.gif ../../../_images/edit.gif
  Set target object as the index target shape for the base shape base object. The full influence of target shape takes effect when its shape weight is targetValue. Parameter list: string: the base objectint: indexstring: the target objectdouble: target value
topologyCheck / tc bool ../../../_images/create.gif
  Set the state of checking for a topology match between the shapes being blended. Default is on.
transform / tr unicode ../../../_images/query.gif ../../../_images/edit.gif
  Set transform for target, then the deltas will become relative to a post transform. Typically the best workflow for this option is to choose a joint that is related to the fix you have introduced. This flag should be used only if the Deformation orderof blendShape node is Before.
weight / w int, float ../../../_images/create.gif ../../../_images/query.gif ../../../_images/edit.gif
  Set the weight value (second parameter) at index (first parameter).
weightCount / wc int ../../../_images/create.gif ../../../_images/query.gif ../../../_images/edit.gif
  Set the number of shape weight values. Flag can have multiple arguments, passed either as a tuple or a list.

Derived from mel command maya.cmds.blendShape

Example:

import pymel.core as pm

#
# Perform a blendShape using the currently-selected objects.
# The lead (last-selected) object will be the base shape, and each
# of the others become targets.
#
pm.blendShape()

#
# Create a blendShape that starts with curve3 as the base, and blends
# in curve1 and curve2 as targets.

pm.blendShape( 'curve1', 'curve2', 'curve3' )

#
# Apply 80% of the total blendShape deformation, by setting
# the envelope parameter to 0.8
pm.blendShape( 'blendShape1', edit=True, en=0.8 )


#
# Set the weights for the first two target shapes to 0.6
# and 0.1 respecxtively
pm.blendShape( 'blendShape1', edit=True, w=[(0, 0.6), (1, 0.1)] )

#
# Add a third target (target3) to the blendShape on curve3
pm.blendShape( 'blendShape1', edit=True, t=('curve3', 1, 'target3', 1.0) )

#
# Add an inbetween (smirk) on target3 for base shape curve3
# The inbetween will take effect at a weight of 0.2
pm.blendShape( 'blendShape2', edit=True, ib=True, t=('curve3', 2, 'smirk', 0.2) )