#include <MPxBlendShape.h>

Class Description

Base class for user-defined blendshape deformers.

MPxBlendShape allows the creation of user-defined blendshape deformers. It derives from MPxGeometryFilter and so offers all the functionality of that class. Additionally, it has the input target and all other attributes of the Maya built-in blendShape node.

Custom nodes derived from MPxBlendShape are treated by Maya just like the built-in blendShape, so all the weight painting/editing etc. tools that artists are used to also work on the custom nodes.

Examples:: basicBlendShape/basicBlendShape.cpp.

Inheritance diagram for MPxBlendShape:

Public Member Functions
	MPxBlendShape ()
	Class constructor.

virtual	~MPxBlendShape ()
	Class destructor.

virtual MPxNode::Type	type () const
	This method returns the type of the node. More...

virtual MStatus	deformData (MDataBlock &block, MDataHandle geomData, unsigned int groupId, const MMatrix &mat, unsigned int multiIndex)
	This method performs the deformation algorithm. More...

Public Member Functions inherited from MPxGeometryFilter
	MPxGeometryFilter ()
	Class constructor.

virtual	~MPxGeometryFilter ()
	Class destructor.

virtual MStatus	deform (MDataBlock &block, MItGeometry &iter, const MMatrix &mat, unsigned int multiIndex)
	This method performs the deformation algorithm. More...

virtual MObject &	accessoryAttribute () const
	This method returns an MObject for the attribute to which an accessory shape is connected. More...

virtual MStatus	accessoryNodeSetup (MDagModifier &cmd)
	This method is called by the "deformer -type" command when your node is specified. More...

void	setUseExistingConnectionWhenSetEditing (bool state)
	This method allows the plugin node to request special treatment during set editing. More...

MStatus	setDeformationDetails (unsigned int flags)
	This method allows the plug-in node to inform the system that it intends to deform components other than just positions. More...

unsigned int	getDeformationDetails (MStatus *ReturnStatus=NULL)
	Retrieves the value set by setDeformationDetails(). More...

virtual void	setModifiedCallback (MSelectionList &list, bool listAdded)
	This callback method can be overriden and is called whenever the set this deformer is operating on is modified. More...

Public Member Functions inherited from MPxNode
	MPxNode ()
	Constructor. More...

virtual	~MPxNode ()
	Destructor.

virtual void	postConstructor ()
	Post constructor. More...

virtual MStatus	compute (const MPlug &plug, MDataBlock &dataBlock)
	This method should be overridden in user defined nodes. More...

virtual bool	getInternalValueInContext (const MPlug &plug, MDataHandle &dataHandle, MDGContext &ctx)
	This method is overridden by nodes that store attribute data in some internal format. More...

virtual bool	setInternalValueInContext (const MPlug &plug, const MDataHandle &dataHandle, MDGContext &ctx)
	This method is overridden by nodes that store attribute data in some internal format. More...

virtual bool	getInternalValue (const MPlug &plug, MDataHandle &dataHandle)
	This method is obsolete. More...

virtual bool	setInternalValue (const MPlug &plug, const MDataHandle &dataHandle)
	This method is obsolete. More...

virtual int	internalArrayCount (const MPlug &plug, const MDGContext &ctx) const
	This method is overridden by nodes that have internal array attributes which are not stored in Maya's datablock. More...

virtual void	copyInternalData (MPxNode *)
	This method is overridden by nodes that store attribute data in some internal format. More...

virtual MStatus	legalConnection (const MPlug &plug, const MPlug &otherPlug, bool asSrc, bool &isLegal) const
	This method allows you to check for legal connections being made to attributes of this node. More...

virtual MStatus	legalDisconnection (const MPlug &plug, const MPlug &otherPlug, bool asSrc, bool &isLegal) const
	This method allows you to check for legal disconnections being made to attributes of this node. More...

virtual MStatus	setDependentsDirty (const MPlug &plug, MPlugArray &plugArray)
	This method can be overridden in user defined nodes to specify which plugs should be set dirty based upon an input plug {plugBeingDirtied} which Maya is marking dirty. More...

virtual MStatus	preEvaluation (const MDGContext &context, const MEvaluationNode &evaluationNode)
	Prepare a node's internal state for threaded evaluation. More...

virtual MStatus	postEvaluation (const MDGContext &context, const MEvaluationNode &evaluationNode, PostEvaluationType evalType)
	Clean up node's internal state after threaded evaluation. More...

virtual SchedulingType	schedulingType () const
	When overridden this method controls the degree of parallelism supported by the node during threaded evaluation. More...

virtual MStatus	connectionMade (const MPlug &plug, const MPlug &otherPlug, bool asSrc)
	This method gets called when connections are made to attributes of this node. More...

virtual MStatus	connectionBroken (const MPlug &plug, const MPlug &otherPlug, bool asSrc)
	This method gets called when connections are broken with attributes of this node. More...

virtual MStatus	dependsOn (const MPlug &plug, const MPlug &otherPlug, bool &depends) const
	This method may be overridden by the user defined node. More...

virtual bool	isPassiveOutput (const MPlug &plug) const
	This method may be overridden by the user defined node if it wants to provide output attributes which do not prevent value modifications to the destination attribute. More...

virtual MStatus	shouldSave (const MPlug &plug, bool &isSaving)
	This method may be overridden by the user defined node. More...

virtual MPlug	passThroughToOne (const MPlug &plug) const
	This method may be overridden by nodes that have a one-to-one relationship between an input attribute and a corresponding output attribute. More...

virtual bool	passThroughToMany (const MPlug &plug, MPlugArray &plugArray) const
	This method is overridden by nodes that want to control the traversal behavior of some Maya search algorithms which traverse the history/future of shape nodes looking for directly related nodes. More...

virtual bool	isAbstractClass () const
	Override this class to return true if this node is an abstract node. More...

virtual MStringArray	getFilesToArchive (bool shortName=false, bool unresolvedName=false, bool markCouldBeImageSequence=false) const
	Use this method to return all external files used by this node. More...

virtual void	getExternalContent (MExternalContentInfoTable &table) const
	Returns the external content (files) that this node depends on. More...

bool	addExternalContentForFileAttr (MExternalContentInfoTable &table, const MObject &attr) const
	Adds content info to the specified table from a file path attribute. More...

bool	setExternalContentForFileAttr (const MObject &attr, const MExternalContentLocationTable &table)
	Sets content info in the specified attribute from the table. More...

virtual void	setExternalContent (const MExternalContentLocationTable &table)
	Changes the location of external content in batch. More...

virtual MTypeId	typeId () const
	Returns the TYPEID of this node. More...

virtual MString	typeName () const
	Returns the type name of this node. More...

virtual MString	name () const
	Returns the name of this particular instance of this class. More...

virtual MObject	thisMObject () const
	Returns the MObject associated with this user defined node. More...

virtual MStatus	setExistWithoutInConnections (bool flag)
	This method specifies whether or not the node can exist without input connections. More...

virtual bool	existWithoutInConnections (MStatus *ReturnStatus=NULL) const
	Determines whether or not this node can exist without input connections. More...

virtual MStatus	setExistWithoutOutConnections (bool flag)
	This method specifies whether or not the node can exist without output connections. More...

virtual bool	existWithoutOutConnections (MStatus *ReturnStatus=NULL) const
	Determines whether or not this node can exist without output connections. More...

Static Public Member Functions
static const char *	className ()
	Returns the name of this class. More...

Static Public Member Functions inherited from MPxGeometryFilter
static const char *	className ()
	Returns the name of this class. More...

Static Public Member Functions inherited from MPxNode
static MStatus	addAttribute (const MObject &attr)
	This method adds a new attribute to a user defined node type during the type's initialization. More...

static MStatus	inheritAttributesFrom (const MString &parentClassName)
	This method allows a class of plugin node to inherit all of the attributes of a second class of plugin node. More...

static MStatus	attributeAffects (const MObject &whenChanges, const MObject &isAffected)
	This method specifies that a particular input attribute affects a specific output attribute. More...

static const char *	className ()
	Returns the name of this class. More...

Static Public Attributes
static MObject	weight
	weight attribute, multi

static MObject	inputTarget
	inputTarget attribute, multi

static MObject	inputTargetGroup
	inputTargetGroup attribute, multi

static MObject	inputTargetItem
	inputTargetItem attribute, multi

static MObject	inputGeomTarget
	inputGeomTarget attribute

static MObject	inputPointsTarget
	inputPointsTarget attribute

static MObject	inputComponentsTarget
	inputComponentsTarget attribute

static MObject	targetWeights
	targetWeights attribute, multi

Static Public Attributes inherited from MPxGeometryFilter
static MObject	input
	input attribute, multi

static MObject	inputGeom
	input geometry attribute

static MObject	groupId
	input group id attribute

static MObject	outputGeom
	geometry output attribute

static MObject	envelope
	envelope attribute

Static Public Attributes inherited from MPxNode
static MObject	message
	message attribute

static MObject	isHistoricallyInteresting
	is historically interesting attribute

static MObject	caching
	caching attribute

static MObject	state
	state attribute

static MObject	frozen
	frozen attribute

Additional Inherited Members
Public Types inherited from MPxGeometryFilter
enum	DeformationDetails { kDeformsUVs = (1<<1), kDeformsColors = (1<<2) }
	Deformation details. More...

Public Types inherited from MPxNode
enum	Type { kDependNode, kLocatorNode, kDeformerNode, kManipContainer, kSurfaceShape, kFieldNode, kEmitterNode, kSpringNode, kIkSolverNode, kHardwareShader, kHwShaderNode, kTransformNode, kObjectSet, kFluidEmitterNode, kImagePlaneNode, kParticleAttributeMapperNode, kCameraSetNode, kConstraintNode, kManipulatorNode, kMotionPathNode, kClientDeviceNode, kThreadedDeviceNode, kAssembly, kSkinCluster, kGeometryFilter, kBlendShape, kLast }
	Defines the type of node. More...

enum	SchedulingType { kParallel, kSerial, kGloballySerial, kUntrusted, kDefaultScheduling = kSerial }
	Defines the degree of parallelism of a node. More...

Protected Member Functions inherited from MPxNode
virtual MDataBlock	forceCache (MDGContext &ctx=MDGContext::fsNormal)
	USE _forceCache() IN SCRIPT. More...

virtual void	setMPSafe (bool flag)
	USE _setMPSafe() IN SCRIPT. More...

virtual MStatus	setDoNotWrite (bool flag)
	USE _setDoNotWrite() IN SCRIPT. More...

virtual bool	doNotWrite (MStatus *ReturnStatus=NULL) const
	USE _doNotWrite() IN SCRIPT. More...

Member Function Documentation

MPxNode::Type type ( ) const

virtual

This method returns the type of the node.

This method should not be overridden by the user. It will return MPxNode::kBlendShape.

Returns: The type of node

Reimplemented from MPxGeometryFilter.

MStatus deformData	(	MDataBlock &	block,
		MDataHandle	geomData,
		unsigned int	groupId,
		const MMatrix &	matrix,
		unsigned int	multiIndex
	)

virtual

This method performs the deformation algorithm.

A status code of MS::kSuccess should be returned unless there was a problem during the deformation, such as insufficient memory or required input data is missing or invalid.

NOTE: the geometry passed to this method is in local space and not world space. To convert points to world space use the matrix that is suppied.

If this method is overriden (and returns success), then deform() (virtual in MPxGeometryFilter()) is NOT called. If the derived node prefers to use deform(), then do not override this method.

Parameters

[in]	block	the node's datablock.
[in]	geomData	a handle to the current geometry being deformed.
[in]	groupId	the group ID within the geometry to deform
[in]	matrix	the geometry's world space transformation matrix.
[in]	multiIndex	the index corresponding to the requested output geometry.

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

Examples:: basicBlendShape/basicBlendShape.cpp.

const char * className ( )

static

Returns the name of this class.

Returns: The name of this class.

The documentation for this class was generated from the following files:

MPxBlendShape.h
MPxBlendShape.cpp

MPxBlendShape Class Reference

Class Description

Public Member Functions

Static Public Member Functions

Static Public Attributes

Additional Inherited Members

Member Function Documentation