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Synopsis

blendShape [-after] [-before] [-deformerTool] [-envelope double] [-exclusive] [-frontOfChain] [-geometry string] [-ignoreSelected] [-inBetween] [-name string] [-origin world|local] [-prune] [-remove] [-split] [-target string int string double] [-topologyCheck boolean] [-weight int double] [-weightCount int] [objects]

blendShape is undoable, queryable, and editable.

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

after, before, deformerTool, envelope, exclusive, frontOfChain, geometry, ignoreSelected, inBetween, name, origin, prune, remove, split, target, topologyCheck, weight, weightCount
Long name (short name) [argument types] Properties
-name(-n) string create
Used to specify the name of the node being created
-geometry(-g) string queryedit
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 ...

In query mode, this flag needs a value.
-remove(-rm) edit
Specifies that objects listed after the -g flag should be removed from this deformer.
-before(-bf) create
If the default behavior for insertion/appending into/onto the existing chain is not what you want then you can use this flag to force the command to stick 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
-after(-af) create
If the default behavior for insertion/appending into/onto the existing chain is not what you want then you can use this flag to force the command to stick 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
-split(-sp) create
Branches off a new chain in the dependency graph instead of inserting/appending the deformer into/onto an existing chain.
-frontOfChain(-foc) create
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.
-ignoreSelected(-is) create
Tells the command to not deform objects on the current selection list
-deformerTool(-dt) query
Returns the name of the deformer tool objects (if any) as string string ...

In query mode, this flag needs a value.
-prune(-pr) edit
Removes any points not being deformed by the deformer in its current configuration from the deformer set.
-exclusive(-ex) createquery
Puts the deformation set in a deform partition.

In query mode, this flag needs a value.
-envelope(-en) double createqueryedit
Set the envelope value for the deformer, controlling how much of the total deformation gets applied. Default is 1.0.

In query mode, this flag needs a value.
-target(-t) string int string double createqueryedit
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:
  1. string: the base object
  2. int: index
  3. string: the target object
  4. double: target value

In query mode, this flag needs a value.
-inBetween(-ib) createedit
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.
-topologyCheck(-tc) boolean create
Set the state of checking for a topology match between the shapes being blended. Default is on.
-weight(-w) int double createqueryedit
Set the weight value (second parameter) at index (first parameter).

In query mode, this flag needs a value.
-weightCount(-wc) int createqueryedit
Set the number of shape weight values.

In query mode, this flag needs a value.
-origin(-o) world|local create
blendShape will be performed with respect to the world by default. The local flag will cause the blend shape to be performed with respect to the shape's local origin.
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 be used more than once in a command

Return value


string[] (the blendShape node name)

Related

bindSkin, boneLattice, copyFlexor, copySkinWeights, flexor, skinCluster, skinPercent, wire, wrinkle

MEL examples

//
// 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.
//
blendShape;

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

blendShape curve1 curve2 curve3;

//
// Apply 80% of the total blendShape deformation, by setting
// the envelope parameter to 0.8
blendShape -edit -en 0.8 blendShape1;

//
// Set the weights for the first two target shapes to 0.6
// and 0.1 respectively
blendShape -edit -w 0 0.6 -w 1 0.1 blendShape1;

//
// Add a third target (target1) to the blendShape on curve3
blendShape -edit -t curve3 2 target1 1.0 blendShape1;

//
// Add "smirk", an inbetween on the third target for base
// shape curve3. The inbetween will take effect at a weight of 0.2
blendShape -edit -ib -t curve3 2 smirk 0.2 blendShape1;