MDataHandle Class Reference
[OpenMaya - API module for common classes]

#include
<MDataHandle.h>

List of all members.

Detailed Description

Data handle for information contained in a data block.

An MDataHandle is a smart pointer into a data block (MDataBlock). A data handle corresponds to the data for a particular attribute or plug. For array data (eg CVs of a curve) use an MArrayDataHandle. To get a data handle, request it from the data block.

Some simple numeric data is handled directly by the dependency graph. If the data is more complicated (eg surface geometry), then the data handle can supply a pointer that should be given to the appropriate data function set.

MDataHandle allows the manipulation and setting of generic attributes as created by the MFnGenericAttribute class. It is possible to create numeric generic attributes using two scenarios. A plug-in may request that the generic attribute support singleton types such as MFnNumericData::kFloat or kChar. Or a plug-in may request array types such as MFnNumericData::k2Float k2Double. In the singleton case, getting and setting the attribute using MDataHandle is done with the asGeneric*() or setGeneric*() methods. In the case of the array types, the MDataHandle.data() method can be used to retrieve the MObject for the attribute and to initialize the MFnNumericData function set. A call to MDataHandle::setData() on the updated attribute must be made to pass the information back to Maya. NOTE: It is not possible to distinguish the singleton generic types from one another. There is no method that can be called to return if the singleton generic attribute is a float, char etc.

MDataHandle methods cannot be assumed to be threadsafe.

Examples:

affectsNode.cpp, animCubeNode.cpp, anisotropicShader.cpp, apiMeshCreator.cpp, apiMeshShape.cpp, apiMeshShape.h, arcLenNode.cpp, backfillShader.cpp, blindDataMesh.cpp, blindDataShader.cpp, brickShader.cpp, buildRotationNode.cpp, cellShader.cpp, cgfxShaderNode.cpp, cgfxShaderNode.h, cgfxVector.cpp, checkerShader.cpp, circleNode.cpp, clearcoat.cpp, closestPointOnCurveNode.cpp, compositingShader.cpp, contrastShader.cpp, customImagePlane.cpp, cvColorNode.cpp, cvColorShader.cpp, depthShader.cpp, displacementShader.cpp, dynExprField.cpp, flameShader.cpp, fullLoftNode.cpp, gammaShader.cpp, genericAttributeNode.cpp, geometrySurfaceConstraint.cpp, geomShader.cpp, GLSLShaderNode.cpp, GLSLShaderNode.h, hlslShader.cpp, hlslShader.h, hwColorPerVertexShader.cpp, hwDecalBumpShader_NV20.cpp, hwPhongShader.cpp, hwPhongShader.h, hwReflectBumpShader_NV20.cpp, hwRefractReflectShader_NV20.cpp, hwToonShader_NV20.cpp, hwUnlitShader.cpp, interpShader.cpp, jitterNode.cpp, lambertShader.cpp, latticeNoiseNode.cpp, lavaShader.cpp, lightShader.cpp, meshOpNode.cpp, mixtureShader.cpp, multiCurveNode.cpp, noiseShader.cpp, offsetNode.cpp, ownerEmitter.cpp, ownerEmitter.h, phongShader.cpp, pnTrianglesNode.cpp, pnTrianglesNode.h, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, quadricShape.cpp, renderAccessNode.cpp, rockingTransform.cpp, rockingTransform.h, rockingTransformCheck.cpp, shadowMatteShader.cpp, shellNode.cpp, shiftNode.cpp, simpleEmitter.cpp, simpleEmitter.h, simpleFluidEmitter.cpp, simpleLoftNode.cpp, simpleSpring.h, sineNode.cpp, slopeShaderNode.cpp, solidCheckerShader.cpp, splitUVNode.cpp, stringFormatNode.cpp, sweptEmitter.cpp, sweptEmitter.h, testNobjectNode.cpp, torusField.cpp, torusField.h, transCircleNode.cpp, volumeShader.cpp, weightListNode.cpp, and yTwistNode.cpp.


Public Member Functions
	MDataHandle ()
bool	isNumeric () const
bool	isGeneric (bool &isNumeric, bool &isNull) const
MFnNumericData::Type	numericType () const
MFnData::Type	type () const
MTypeId	typeId () const
MStatus	acceptedTypeIds (MUintArray &) const
MObject	data ()
MStatus	copy (const MDataHandle &src)
void	setClean ()
bool &	asBool () const
char &	asChar () const
unsigned char &	asUChar () const
short &	asShort () const
int &	asLong () const
	This method is obsolete.
int &	asInt () const
void *&	asAddr () const
float &	asFloat () const
double &	asDouble () const
MDistance	asDistance () const
MAngle	asAngle () const
MTime	asTime () const
short2 &	asShort2 () const
long2 &	asLong2 () const
	This method is obsolete.
int2 &	asInt2 () const
float2 &	asFloat2 () const
double2 &	asDouble2 () const
short3 &	asShort3 () const
long3 &	asLong3 () const
	This method is obsolete.
int3 &	asInt3 () const
float3 &	asFloat3 () const
double3 &	asDouble3 () const
MVector &	asVector () const
MFloatVector &	asFloatVector () const
MMatrix &	asMatrix () const
MFloatMatrix &	asFloatMatrix () const
MString &	asString () const
MObject	asNurbsCurve () const
MObject	asNurbsSurface () const
MObject	asMesh () const
MObject	asSubdSurface () const
MObject	asNurbsCurveTransformed () const
MObject	asNurbsSurfaceTransformed () const
MObject	asMeshTransformed () const
MObject	asSubdSurfaceTransformed () const
const MMatrix &	geometryTransformMatrix () const
MPxData *	asPluginData () const
void	set (bool)
	No script support.
void	set (char)
	No script support.
void	set (short)
	No script support.
void	set (int)
	No script support.
void	set (float)
	No script support.
void	set (double)
	No script support.
void	set (const MMatrix &)
	No script support.
void	set (const MFloatMatrix &)
	No script support.
void	set (const MVector &)
	No script support.
void	set (const MFloatVector &)
	No script support.
void	set (const MDistance &)
	No script support.
void	set (const MAngle &)
	No script support.
void	set (const MTime &)
	No script support.
void	set (short, short)
	No script support.
void	set (int, int)
	No script support.
void	set (float, float)
	No script support.
void	set (double, double)
	No script support.
void	set (short, short, short)
	No script support.
void	set (int, int, int)
	No script support.
void	set (float, float, float)
	No script support.
void	set (double, double, double)
	No script support.
void	set (const MString &)
	No script support.
MStatus	set (const MObject &data)
	No script support.
MStatus	set (MPxData *data)
	No script support.
void	setBool (bool)
void	setChar (char)
void	setShort (short)
void	setInt (int)
void	setFloat (float)
void	setDouble (double)
void	setMMatrix (const MMatrix &)
void	setMFloatMatrix (const MFloatMatrix &)
void	setMVector (const MVector &)
void	setMFloatVector (const MFloatVector &)
void	setMDistance (const MDistance &)
void	setMAngle (const MAngle &)
void	setMTime (const MTime &)
void	set2Short (short, short)
void	set2Int (int, int)
void	set2Float (float, float)
void	set2Double (double, double)
void	set3Short (short, short, short)
void	set3Int (int, int, int)
void	set3Float (float, float, float)
void	set3Double (double, double, double)
void	setString (const MString &)
MStatus	setMObject (const MObject &data)
MStatus	setMPxData (MPxData *data)
bool	asGenericBool () const
unsigned char	asGenericChar () const
double	asGenericDouble () const
float	asGenericFloat () const
short	asGenericShort () const
int	asGenericInt () const
void	setGenericBool (bool value, bool force)
void	setGenericChar (unsigned char value, bool force)
void	setGenericDouble (double value, bool force)
void	setGenericFloat (float value, bool force)
void	setGenericShort (short value, bool force)
void	setGenericInt (int value, bool force)
MDataHandle	child (const MPlug &plug)
MDataHandle	child (const MObject &attribute)
MDataHandle &	operator= (const MDataHandle &other)
	MDataHandle (const MDataHandle &)
Friends
class	MDataBlock
class	MArrayDataBuilder
class	MArrayDataHandle
class	MItGeometry

Constructor & Destructor Documentation

MDataHandle::MDataHandle ( )

Constructor for MDataHandle.

Typically, data handles will be obtained from the data block (MDataBlock). A user constructed MDataHandle should not be used until a valid data handle has been assigned to it (ie. using the assignment operator).

MDataHandle::MDataHandle ( const MDataHandle & other ) [inline]

Copy constructor.

Member Function Documentation

bool MDataHandle::isNumeric ( ) const

Returns true if this handle is for simple numeric data. That means that the numeric data is directly accessible through the non-generic as*() and set*() methods of this handle. For example, depending on handle initialization, the asBool() may be called but the asGenericBool() should not be called.

Returns:: Whether this handle points to simple numeric data

bool MDataHandle::isGeneric	(	bool &	isNumeric,
		bool &	isNull
	)			const

Returns true if this handle is for generic data. There are 2 forms of generic data. The first is for simple data and is used if the isNumeric parameter returns true. In this case, the asGeneric*() and setGeneric*() methods of this class are used to query and set values. The second form of generic data is for more complex attribute types. As a result the type of the object must be checked and an appropriate attribute function set initialized with the object.

Parameters:

`[out]`	isNumeric	returns true if this handle is for simple generic numeric data
`[out]`	isNull	returns true if this handle is not set

Returns:: True will be returned if this handle points to a generic attribute

Examples:

genericAttributeNode.cpp.

MFnNumericData::Type MDataHandle::numericType ( ) const

Returns the type of data represented by this handle. This method is only valid for data handles of simple numeric types.

Returns:: The numeric type

MFnData::Type MDataHandle::type ( ) const

Returns the type of data represented by this handle.

Returns:: The data type

Examples:

cgfxVector.cpp.

MTypeId MDataHandle::typeId ( ) const

Returns the type of data represented by this handle as a type id. A type id is a four character code that is used to identify the data type. If no data exists for this handle, the type id will be 0x0.

Returns:: The data type

MStatus MDataHandle::acceptedTypeIds ( MUintArray & typids ) const

This method returns an array of MTypeId ids that the data handle can accept. The MTypeId can be reconstructed using the unsigned int in id.

Parameters:

[out] typids an unsigned int array to copy the ids to

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kFailure The method failed

MObject MDataHandle::data ( )

Returns the data object from this handle. The object returned should be used with the appropriate data function set. This method is not valid for simple numeric types.

Returns:: The data object

Examples:

apiMeshShape.cpp, cgfxVector.cpp, cvColorNode.cpp, dynExprField.cpp, latticeNoiseNode.cpp, meshOpNode.cpp, ownerEmitter.cpp, particleAttrNode.cpp, simpleFluidEmitter.cpp, splitUVNode.cpp, sweptEmitter.cpp, testNobjectNode.cpp, testNucleusNode.cpp, and torusField.cpp.

MStatus MDataHandle::copy ( const MDataHandle & src )

Copies the attribute from the src attribute to the attribute referenced by this handle. This is the only method which can completely copy a compound attribute from one handle to another. The construct outputHandle.set (inputHandle.data()) will not work for compound or multi attributes.

Parameters:

[in] src the handle to the attribute to copy

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kFailure The method failed

void MDataHandle::setClean ( )

Marks the data that is represented by this handle as being clean. This should be done after recalculating the data from the inputs.

Examples:

bool & MDataHandle::asBool ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a boolean

Examples:

anisotropicShader.cpp, apiMeshShape.cpp, backfillShader.cpp, cgfxShaderNode.cpp, cgfxVector.cpp, cvColorShader.cpp, lambertShader.cpp, lightShader.cpp, ownerEmitter.h, phongShader.cpp, pnTrianglesNode.cpp, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, shadowMatteShader.cpp, shiftNode.cpp, simpleEmitter.h, sweptEmitter.h, torusField.h, and volumeShader.cpp.

char & MDataHandle::asChar ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a char

unsigned char & MDataHandle::asUChar ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an unsigned char

short & MDataHandle::asShort ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a short integer

Examples:

apiMeshCreator.cpp, buildRotationNode.cpp, GLSLShaderNode.cpp, meshOpNode.cpp, phongShader.cpp, quadricShape.cpp, and splitUVNode.cpp.

int & MDataHandle::asLong ( ) const

This method is obsolete.

Deprecated:: Use MDataHandle::asInt instead.

Returns:: The handle's data as a int integer

Examples:

blindDataMesh.cpp, cvColorShader.cpp, lavaShader.cpp, multiCurveNode.cpp, pointOnMeshInfoNode.cpp, and pointOnSubdNode.cpp.

int & MDataHandle::asInt ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a int integer

Examples:

affectsNode.cpp, genericAttributeNode.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, particleAttrNode.cpp, and pnTrianglesNode.cpp.

void *& MDataHandle::asAddr ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an address

Examples:

cvColorShader.cpp, lightShader.cpp, and phongShader.cpp.

float & MDataHandle::asFloat ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a float

Examples:

double & MDataHandle::asDouble ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a double

Examples:

MDistance MDataHandle::asDistance ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an Distance

MAngle MDataHandle::asAngle ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an MAngle

MTime MDataHandle::asTime ( ) const

Returns the data represented by this handle in the data block. Even though this method does not return a reference to an MTime, modifications to the MTime instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

Returns:: The handle's data as an MTime

Examples:

animCubeNode.cpp, latticeNoiseNode.cpp, ownerEmitter.h, simpleEmitter.h, sweptEmitter.h, testNobjectNode.cpp, and testNucleusNode.cpp.

short2 & MDataHandle::asShort2 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of two short integers

long2 & MDataHandle::asLong2 ( ) const

This method is obsolete.

Deprecated:: Use MDataHandle::asInt2 instead.

Returns:: The handle's data as an array of two int integers

int2 & MDataHandle::asInt2 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of two int integers

float2 & MDataHandle::asFloat2 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of two floats

Examples:

brickShader.cpp, checkerShader.cpp, and shiftNode.cpp.

double2 & MDataHandle::asDouble2 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of two doubles

short3 & MDataHandle::asShort3 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of three short integers

long3 & MDataHandle::asLong3 ( ) const

This method is obsolete.

Deprecated:: Use MDataHandle::asInt3 instead.

Returns:: The handle's data as an array of three int integers

int3 & MDataHandle::asInt3 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of three int integers

float3 & MDataHandle::asFloat3 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array of three float values

Examples:

cellShader.cpp, flameShader.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, lavaShader.cpp, noiseShader.cpp, and solidCheckerShader.cpp.

double3 & MDataHandle::asDouble3 ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as an array array of three doubles

Examples:

apiMeshShape.cpp, cgfxVector.cpp, ownerEmitter.h, rockingTransformCheck.cpp, simpleEmitter.h, sweptEmitter.h, and transCircleNode.cpp.

MVector & MDataHandle::asVector ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a vector

Examples:

buildRotationNode.cpp.

MFloatVector & MDataHandle::asFloatVector ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a vector

Examples:

MMatrix & MDataHandle::asMatrix ( ) const

Returns the data represented by this handle in the data block. This method is only valid for attributes created using the MFnMatrixAttribute function set.

Returns:: The handle's data as a matrix

Examples:

offsetNode.cpp, ownerEmitter.cpp, simpleEmitter.cpp, and torusField.cpp.

MFloatMatrix & MDataHandle::asFloatMatrix ( ) const

Returns the data represented by this handle in the data block. This method is only valid for attributes created using the MFnMatrixAttribute function set.

Returns:: The handle's data as a matrix of floats

Examples:

anisotropicShader.cpp, cellShader.cpp, flameShader.cpp, lavaShader.cpp, noiseShader.cpp, slopeShaderNode.cpp, and solidCheckerShader.cpp.

MString & MDataHandle::asString ( ) const

Returns the data represented by this handle in the data block.

Returns:: The handle's data as a string

Examples:

cgfxShaderNode.cpp, GLSLShaderNode.cpp, hlslShader.cpp, hwColorPerVertexShader.cpp, and stringFormatNode.cpp.

MObject MDataHandle::asNurbsCurve ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the nurbs curve function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The curve returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the nurbs curve function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:: The handle's data as a nurbs curve

Examples:

closestPointOnCurveNode.cpp, fullLoftNode.cpp, and simpleLoftNode.cpp.

MObject MDataHandle::asNurbsSurface ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the nurbs surface function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the nurbs surface function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:: The handle's data as a nurbs surface

Examples:

cvColorNode.cpp.

MObject MDataHandle::asMesh ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the mesh function set and iterators. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the mesh function set and iterators.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:: The handle's data as a mesh (polygonal surface)

Examples:

geometrySurfaceConstraint.cpp, meshOpNode.cpp, pointOnMeshInfoNode.cpp, shellNode.cpp, splitUVNode.cpp, and testNobjectNode.cpp.

MObject MDataHandle::asSubdSurface ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the subdivision surface function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The subdivision surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the subdivision surface function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:: The handle's data as a subdivision surface

Examples:

pointOnSubdNode.cpp.

MObject MDataHandle::asNurbsCurveTransformed ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the nurbs curve function set (MFnNurbsCurve) or the nurbs curve CV iterator (MItCurveCV).

If the incoming curve comes with world space transformation data, then it will be applied to the data that is returned. In other words, the curve that is returned will be the curve as it exists in world space.

The curve that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:: The handle's data as a nurbs curve

Examples:

arcLenNode.cpp, and multiCurveNode.cpp.

MObject MDataHandle::asNurbsSurfaceTransformed ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the nurbs surface function set (MFnNurbsSurface) or the nurbs surface CV iterator (MItSurfaceCV).

If the incoming surface comes with world space transformation data, then it will be applied to the data that is returned. In other words, the surface that is returned will be the surface as it exists in world space.

The surface that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:: The handle's data as a nurbs surface

MObject MDataHandle::asMeshTransformed ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the mesh function set (MFnMesh) or any of the mesh iterators.

If the incoming mesh comes with world space transformation data, then it will be applied to the data that is returned. In other words, the mesh that is returned will be the mesh as it exists in world space.

The mesh that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:: The handle's data as a mesh

MObject MDataHandle::asSubdSurfaceTransformed ( ) const

Returns the data represented by this handle in the data block. The object returned by this call may be used directly with the subdivision surface function set (MFnSubdSurface) or the subdivision surface iterators (MItSubdVertex, MItSubdFace, MItSubdEdge).

If the incoming surface comes with world space transformation data, then it will be applied to the data that is returned. In other words, the surface that is returned will be the surface as it exists in world space.

The surface that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:: The handle's data as a subdivision surface

const MMatrix & MDataHandle::geometryTransformMatrix ( ) const

This method returns a reference to the local-to-world transformation matrix that can accompany a geometry data object. Only use this method on handles to geometry data (curves, surfaces, and meshes).

If no local-to-world transformation information has been provided then this will be an identity matrix.

Returns:: The handle's transform data as a 4x4 matrix

MPxData * MDataHandle::asPluginData ( ) const

Returns the data represented by this handle in the data block. The object is returned as plugin data. This should be used to access data types defined by plugins.

Returns:: The handle's data

Examples:

apiMeshShape.cpp.

void MDataHandle::set ( bool val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setBool method instead.

Parameters:

[in] val the new value

Examples:

affectsNode.cpp, animCubeNode.cpp, apiMeshCreator.cpp, apiMeshShape.cpp, arcLenNode.cpp, blindDataMesh.cpp, buildRotationNode.cpp, cgfxShaderNode.cpp, cgfxVector.cpp, circleNode.cpp, closestPointOnCurveNode.cpp, customImagePlane.cpp, cvColorNode.cpp, dynExprField.cpp, fullLoftNode.cpp, genericAttributeNode.cpp, GLSLShaderNode.cpp, hlslShader.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, jitterNode.cpp, latticeNoiseNode.cpp, meshOpNode.cpp, multiCurveNode.cpp, ownerEmitter.cpp, pnTrianglesNode.cpp, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, quadricShape.cpp, rockingTransform.cpp, rockingTransformCheck.cpp, shellNode.cpp, shiftNode.cpp, simpleEmitter.cpp, simpleLoftNode.cpp, sineNode.cpp, splitUVNode.cpp, stringFormatNode.cpp, sweptEmitter.cpp, testNobjectNode.cpp, torusField.cpp, transCircleNode.cpp, and weightListNode.cpp.

void MDataHandle::set ( char val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setChar method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( short val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setShort method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( int val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setInt method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( float val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setFloat method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( double val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setDouble method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MMatrix & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method is only valid for attributes created using the MFnMatrixAttribute function set.

Python Notes

This method is not available from Python. See setMMatrix method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MFloatMatrix & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMFloatMatrix method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MVector & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMVector method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MFloatVector & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMFloatVector method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MDistance & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMDistance method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MAngle & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMAngle method instead.

Parameters:

[in] val the new value

void MDataHandle::set ( const MTime & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMTime method instead.

Parameters:

[in] val the new value

void MDataHandle::set	(	short	val1,
		short	val2
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Short method instead.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set	(	int	val1,
		int	val2
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Int method instead.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set	(	float	val1,
		float	val2
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Float method instead.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set	(	double	val1,
		double	val2
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Double method instead.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set	(	short	val1,
		short	val2,
		short	val3
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Short method instead.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set	(	int	val1,
		int	val2,
		int	val3
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Int method instead.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set	(	float	val1,
		float	val2,
		float	val3
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Float method instead.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set	(	double	val1,
		double	val2,
		double	val3
	)

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Double method instead.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set ( const MString & val )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setString method instead.

Parameters:

[in] val the new string value

MStatus MDataHandle::set ( const MObject & data )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method assumes that the MObject is a dependency graph data object. These objects can be created using the appropriate MFn..Data function set. Note that this method cannot be used to copy compound or multi attributes from one handle to another via the construct outputHandle.set (inputHandle.data()). To copy these user defined attributes, the method MDataHandle::copy must be used.

Python Notes

This method is not available from Python. See setMObject method instead.

Parameters:

[in] data the data object

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kInvalidParameter Invalid object passed in

MStatus MDataHandle::set ( MPxData * data )

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method takes a pointer to a user defined data object. The data block will become the new owner of the data object that you pass in. Do not delete it.

Python Notes

This method is not available from Python. See setMPxData method instead.

Parameters:

[in] data the data object

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kInvalidParameter Invalid data

void MDataHandle::setBool ( bool val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setChar ( char val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setShort ( short val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setInt ( int val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setFloat ( float val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setDouble ( double val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMMatrix ( const MMatrix & val )

Set the data that this handle represents in the data block. This method is only valid for attributes created using the MFnMatrixAttribute function set.

Parameters:

[in] val the new value

void MDataHandle::setMFloatMatrix ( const MFloatMatrix & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMVector ( const MVector & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMFloatVector ( const MFloatVector & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMDistance ( const MDistance & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMAngle ( const MAngle & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::setMTime ( const MTime & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new value

void MDataHandle::set2Short	(	short	val1,
		short	val2
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set2Int	(	int	val1,
		int	val2
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set2Float	(	float	val1,
		float	val2
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set2Double	(	double	val1,
		double	val2
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the two element array
`[in]`	val2	the second value in the two element array

void MDataHandle::set3Short	(	short	val1,
		short	val2,
		short	val3
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set3Int	(	int	val1,
		int	val2,
		int	val3
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set3Float	(	float	val1,
		float	val2,
		float	val3
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::set3Double	(	double	val1,
		double	val2,
		double	val3
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	val1	the first value in the three element array
`[in]`	val2	the second value in the three element array
`[in]`	val3	the third value in the three element array

void MDataHandle::setString ( const MString & val )

Set the data that this handle represents in the data block.

Parameters:

[in] val the new string value

MStatus MDataHandle::setMObject ( const MObject & data )

Set the data that this handle represents in the data block. This method assumes that the MObject is a dependency graph data object. These objects can be created using the appropriate MFn..Data function set. Note that this method cannot be used to copy compound or multi attributes from one handle to another via the construct outputHandle.set (inputHandle.data()). To copy these user defined attributes, the method MDataHandle::copy must be used.

Parameters:

[in] data the data object

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kInvalidParameter Invalid object passed in

Examples:

geometrySurfaceConstraint.cpp.

MStatus MDataHandle::setMPxData ( MPxData * data )

Set the data that this handle represents in the data block. This method takes a pointer to a user defined data object. The data block will become the new owner of the data object that you pass in. Do not delete it.

Parameters:

[in] data the data object

Returns:: Status code

Status Codes:

MS::kSuccess The method was successful
MS::kInvalidParameter Invalid data

bool MDataHandle::asGenericBool ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a bool

unsigned char MDataHandle::asGenericChar ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a char

double MDataHandle::asGenericDouble ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a double

float MDataHandle::asGenericFloat ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a float

short MDataHandle::asGenericShort ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a short

int MDataHandle::asGenericInt ( ) const

Returns the generic data represented by this handle in the data block.

Returns:: The generic handle's data as a int

void MDataHandle::setGenericBool	(	bool	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new bool value
`[in]`	force	force the new type of the attribute to be bool

Examples:

genericAttributeNode.cpp.

void MDataHandle::setGenericChar	(	unsigned char	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new char value
`[in]`	force	force the new type of the attribute to be char

Examples:

genericAttributeNode.cpp.

void MDataHandle::setGenericDouble	(	double	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new double value
`[in]`	force	force the new type of the attribute to be double

Examples:

genericAttributeNode.cpp.

void MDataHandle::setGenericFloat	(	float	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new float value
`[in]`	force	force the new type of the attribute to be float

Examples:

genericAttributeNode.cpp.

void MDataHandle::setGenericShort	(	short	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new short value
`[in]`	force	force the new type of the attribute to be short

Examples:

genericAttributeNode.cpp.

void MDataHandle::setGenericInt	(	int	value,
		bool	force
	)

Set the data that this handle represents in the data block.

Parameters:

`[in]`	value	the new int value
`[in]`	force	force the new type of the attribute to be int

Examples:

genericAttributeNode.cpp.

MDataHandle MDataHandle::child ( const MPlug & plug )

Get a handle to a child of this handle. This is used if you have a handle to a compound attribute.

Parameters:

[in] plug the plug of the child

Returns:: The data handle for the child

Examples:

anisotropicShader.cpp, backfillShader.cpp, dynExprField.cpp, geometrySurfaceConstraint.cpp, lambertShader.cpp, lightShader.cpp, phongShader.cpp, shadowMatteShader.cpp, torusField.cpp, and weightListNode.cpp.

MDataHandle MDataHandle::child ( const MObject & attribute )

Get a handle to a child of this handle. This is used if you have a handle to a compound attribute.

Parameters:

[in] attribute the attribute of the child

Returns:: The data handle for the child

MDataHandle & MDataHandle::operator= ( const MDataHandle & other ) [inline]

Assignment operator.

Parameters:

[in] other Data handle to copy from.

MDataHandle Class Reference [OpenMaya - API module for common classes]

Detailed Description

Public Member Functions

Friends

Constructor & Destructor Documentation

Member Function Documentation

MDataHandle Class Reference
[OpenMaya - API module for common classes]