MFnTransform Class Reference
[OpenMaya - API module for common classes, FunctionSet classes]

#include <MFnTransform.h>

Inheritance diagram for MFnTransform:

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Collaboration diagram for MFnTransform:

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List of all members.

Detailed Description

Create and access transform nodes.

The MFnTransform function set provides access to transformation DAG nodes called transforms.

DAG nodes are separated into two types, transforms and geometry nodes. All DAG nodes that are not transform nodes must exist as a child of a transform node. Only transforms provide transformation information. Transforms are also commonly used as parent nodes for the purpose of hierarchical grouping.

The transformation in the node is represented as a 4x4 transformation matrix. This function set allows access to the whole matrix, or the individual components (eg scale, rotation, shear, etc) of the transformation. The transform node is made up of many components that make up the final transformation matrix. This breakdown provides animators fine control over the animation of these parameters. Therefore, it is necessary to describe the order in which these attributes are applied to build the final matrix attribute.

A transformation matrix is composed of the following components, all components with units will be in maya's internal units (radians for rotations and centimeters for translations):

Scale pivot point point around which scales are performed [Sp]
Scale scaling about x, y, z axes [S]
Shear shearing in xy, xz, yx [Sh]
Scale pivot translation translation introduced to preserve existing scale transformations when moving pivot. This is used to prevent the object from moving when the objects pivot point is not at the origin and a non-unit scale is applied to the object [St].
Rotate pivot point point about which rotations are performed [Rp]
Rotation orientation rotation to orient local rotation space [Ro]
Rotation rotation [R]
Rotate pivot translation translation introduced to preserve exisitng rotate transformations when moving pivot. This is used to prevent the object from moving when the objects pivot point is not at the origin and the pivot is moved. [Rt]
Translate translation in x, y, z axes [T]

The matrices are post-multiplied in Maya. For example, to transform a point P from object-space to world-space (P') you would need to post-multiply by the worldMatrix. (P' = P x WM)

The transformation matrix is then constructed as follows:

     -1                       -1
  [Sp]x[S]x[Sh]x[Sp]x[St]x[Rp]x[Ro]x[R]x[Rp]x[Rt]x[T]

where 'x' denotes matrix multiplication and '-1' denotes matrix inversion

     Sp = |  1    0    0    0 |     St = |  1    0    0    0 |
          |  0    1    0    0 |          |  0    1    0    0 |
          |  0    0    1    0 |          |  0    0    1    0 |
          | spx  spy  spz   1 |          | sptx spty sptz  1 |

     S  = |  sx   0    0    0 |     Sh = |  1    0    0    0 |
          |  0    sy   0    0 |          | shxy  1    0    0 |
          |  0    0    sz   0 |          | shxz shyz  1    0 |
          |  0    0    0    1 |          |  0    0    0    1 |

     Rp = |  1    0    0    0 |     Rt = |  1    0    0    0 |
          |  0    1    0    0 |          |  0    1    0    0 |
          |  0    0    1    0 |          |  0    0    1    0 |
          | rpx  rpy  rpz   1 |          | rptx rpty rptz  1 |

     Ro = AX * AY * AZ

     AX = |  1    0    0    0 |     AY = |  cy   0   -sy   0 |
          |  0    cx   sx   0 |          |  0    1    0    0 |
          |  0   -sx   cx   0 |          |  sy   0    cy   0 |
          |  0    0    0    1 |          |  0    0    0    1 |

     AZ = |  cz   sz   0    0 |     sx = sin(rax), cx = cos(rax)
          | -sz   cz   0    0 |     sy = sin(ray), cx = cos(ray)
          |  0    0    1    0 |     sz = sin(raz), cz = cos(raz)
          |  0    0    0    1 |

         R  = RX * RY * RZ  (Note: order is determined by rotateOrder)

     RX = |  1    0    0    0 |     RY = |  cy   0   -sy   0 |
          |  0    cx   sx   0 |          |  0    1    0    0 |
          |  0   -sx   cx   0 |          |  sy   0    cy   0 |
          |  0    0    0    1 |          |  0    0    0    1 |

     RZ = |  cz   sz   0    0 |     sx = sin(rx), cx = cos(rx)
          | -sz   cz   0    0 |     sy = sin(ry), cx = cos(ry)
          |  0    0    1    0 |     sz = sin(rz), cz = cos(rz)
          |  0    0    0    1 |

     T  = |  1    0    0    0 |
          |  0    1    0    0 |
          |  0    0    1    0 |
          |  tx   ty   tz   1 |

Note that internally the Maya transform does not store the individual component values in matrices. It stores them in the data structure which makes the most sense for that component. For example, translation is stored as a vector. The accessor methods on MFnTransform provide the data in their native structure rather than as a matrix.

Additionally, each transform can save a temporary "rest position" matrix using the setRestPosition method. The rest position is not used internally by Maya. It is exclusively for use from the API as a temporary cache, which can be set and restored within a single Maya session. Note that the rest position is not saved with the scene.

Examples:

: closestPointOnNurbsSurfaceCmd.cpp, customAttrManip.cpp, footPrintManip.cpp, geometrySurfaceConstraint.cpp, intersectOnNurbsSurfaceCmd.cpp, lineManip.cpp, lineManipContainer.cpp, moveNumericTool.cpp, moveTool.cpp, simpleSolverNode.cpp, squareScaleManip.cpp, squareScaleManipContext.cpp, surfaceBumpManip.cpp, and swissArmyManip.cpp.


Public Types
enum	LimitType { kScaleMinX, kScaleMaxX, kScaleMinY, kScaleMaxY, kScaleMinZ, kScaleMaxZ, kShearMinXY, kShearMaxXY, kShearMinXZ, kShearMaxXZ, kShearMinYZ, kShearMaxYZ, kRotateMinX, kRotateMaxX, kRotateMinY, kRotateMaxY, kRotateMinZ, kRotateMaxZ, kTranslateMinX, kTranslateMaxX, kTranslateMinY, kTranslateMaxY, kTranslateMinZ, kTranslateMaxZ }
	Limit types. More...
Public Member Functions
virtual MFn::Type	type () const
	Function set type.
virtual	~MFnTransform ()
	Destructor.
	MFnTransform ()
	Default constructor.
	MFnTransform (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor.
	MFnTransform (const MDagPath &object, MStatus *ret=NULL)
	Constructor.
MObject	create (MObject parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
MTransformationMatrix	transformation (MStatus *ReturnStatus=NULL) const
MStatus	set (const MTransformationMatrix &transform)
MStatus	getScale (double scale[3]) const
MStatus	setScale (const double scale[3])
MStatus	scaleBy (const double scale[3])
MStatus	getShear (double scale[3]) const
MStatus	setShear (const double shear[3])
MStatus	shearBy (const double shear[3])
MStatus	getRotation (MQuaternion &quaternion, MSpace::Space=MSpace::kTransform) const
MStatus	setRotation (const MQuaternion &quaternion, MSpace::Space=MSpace::kTransform)
MStatus	rotateBy (const MQuaternion &quaternion, MSpace::Space=MSpace::kTransform)
MStatus	getRotation (MEulerRotation &rotation) const
MStatus	setRotation (const MEulerRotation &rotation)
MStatus	rotateBy (const MEulerRotation &rotation, MSpace::Space=MSpace::kTransform)
MStatus	getRotationQuaternion (double &x, double &y, double &z, double &w, MSpace::Space=MSpace::kTransform) const
MStatus	setRotationQuaternion (double x, double y, double z, double w, MSpace::Space=MSpace::kTransform)
MStatus	rotateByQuaternion (double x, double y, double z, double w, MSpace::Space=MSpace::kTransform)
MStatus	getRotation (double rotation[3], MTransformationMatrix::RotationOrder &order) const
MStatus	setRotation (const double rotation[3], MTransformationMatrix::RotationOrder order)
MStatus	rotateBy (const double rotation[3], MTransformationMatrix::RotationOrder order, MSpace::Space=MSpace::kTransform)
MVector	getTranslation (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setTranslation (const MVector &vec, MSpace::Space space)
MStatus	translateBy (const MVector &vec, MSpace::Space space)
MPoint	scalePivot (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setScalePivot (const MPoint &point, MSpace::Space space, bool balance)
MVector	scalePivotTranslation (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setScalePivotTranslation (const MVector &vec, MSpace::Space space)
MPoint	rotatePivot (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setRotatePivot (const MPoint &point, MSpace::Space space, bool balance)
MVector	rotatePivotTranslation (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setRotatePivotTranslation (const MVector &vec, MSpace::Space space)
MQuaternion	rotateOrientation (MSpace::Space space, MStatus *ReturnStatus=NULL) const
MStatus	setRotateOrientation (const MQuaternion &quat, MSpace::Space space, bool balance)
MTransformationMatrix::RotationOrder	rotationOrder (MStatus *ReturnStatus=NULL) const
MStatus	setRotationOrder (MTransformationMatrix::RotationOrder order, bool reorder)
MTransformationMatrix	restPosition (MStatus *ReturnStatus) const
MStatus	setRestPosition (const MTransformationMatrix &matrix)
MStatus	resetFromRestPosition ()
MStatus	clearRestPosition ()
MStatus	getRotation (double rotation[3], MTransformationMatrix::RotationOrder &order, MSpace::Space) const
	This method is obsolete.
MStatus	setRotation (const double rotation[3], MTransformationMatrix::RotationOrder order, MSpace::Space)
	This method is obsolete.
MVector	translation (MSpace::Space space, MStatus *ReturnStatus=NULL) const
	This method is obsolete.
bool	isLimited (MFnTransform::LimitType type, MStatus *ReturnStatus=NULL) const
double	limitValue (MFnTransform::LimitType type, MStatus *ReturnStatus=NULL) const
MStatus	setLimit (MFnTransform::LimitType type, double value)
MStatus	enableLimit (MFnTransform::LimitType type, bool flag)
	MFnTransform (const MObject &object, MStatus *ret=NULL)
	Constructor.
Protected Member Functions
virtual const char *	className () const
	Class name.

Member Enumeration Documentation

enum MFnTransform::LimitType

Limit types.

Enumerator:

kScaleMinX
kScaleMaxX
kScaleMinY
kScaleMaxY
kScaleMinZ
kScaleMaxZ
kShearMinXY
kShearMaxXY
kShearMinXZ
kShearMaxXZ
kShearMinYZ
kShearMaxYZ
kRotateMinX
kRotateMaxX
kRotateMinY
kRotateMaxY
kRotateMinZ
kRotateMaxZ
kTranslateMinX
kTranslateMaxX
kTranslateMinY
kTranslateMaxY
kTranslateMinZ
kTranslateMaxZ

Constructor & Destructor Documentation

MFnTransform::~MFnTransform ( ) [virtual]

Destructor.

Class Destructor

MFnTransform::MFnTransform	(	MObject &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters:

`[in]`	object	The MObject to attach the function set to
`[out]`	ReturnStatus	the return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

MFnTransform::MFnTransform	(	const MDagPath &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given constant MDagPath object.

Parameters:

`[in]`	object	The const MDagPath to attach the function set to
`[out]`	ReturnStatus	The return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

MFnTransform::MFnTransform	(	const MObject &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters:

`[in]`	object	The MObject to attach the function set to
`[out]`	ReturnStatus	the return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

Member Function Documentation

MFn::Type MFnTransform::type ( ) const [virtual]

Function set type.

Return the class type : MFn::kTransform

Reimplemented from MFnDagNode.

Reimplemented in MFnCircleSweepManip, MFnCurveSegmentManip, MFnDirectionManip, MFnDiscManip, MFnDistanceManip, MFnFreePointTriadManip, MFnHikEffector, MFnIkEffector, MFnIkHandle, MFnIkJoint, MFnManip3D, MFnPointOnCurveManip, MFnPointOnSurfaceManip, MFnRotateManip, MFnScaleManip, MFnStateManip, and MFnToggleManip.

const char * MFnTransform::className ( ) const [protected, virtual]

Class name.

Return the class name : "MFnTransform"

Reimplemented from MFnDagNode.

Reimplemented in MFnCircleSweepManip, MFnCurveSegmentManip, MFnDirectionManip, MFnDiscManip, MFnDistanceManip, MFnFreePointTriadManip, MFnHikEffector, MFnIkEffector, MFnIkHandle, MFnIkJoint, MFnManip3D, MFnPointOnCurveManip, MFnPointOnSurfaceManip, MFnRotateManip, MFnScaleManip, MFnStateManip, and MFnToggleManip.

MObject MFnTransform::create	(	MObject	parent = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

Creates a new transformation node. The new node is placed in the DAG.

Parameters:

`[in]`	parent	the parent of the transform to be created
`[out]`	ReturnStatus	status code

Returns:: The newly created transform node object

Status Codes:

MS::kSuccess operation successful
MS::kInsufficientMemory out of memory
MS::kInvalidParameter parent is not a DAG node
MS::kLicenseFailure application not licensed for attempted operation
MS::kFailure transform could not be added to DAG

Reimplemented in MFnHikEffector, MFnIkEffector, and MFnIkJoint.

MTransformationMatrix MFnTransform::transformation ( MStatus * ReturnStatus = NULL ) const

Retrieve the transformation matrix represented by this transform.

Parameters:

[out] ReturnStatus status code

Returns:: The transformation matrix represented by this transform.

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::set ( const MTransformationMatrix & transform )

Change this transform to equal the given matrix.

Parameters:

[in] transform the matrix to copy

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::getScale ( double scale[3] ) const

Retrieve the scaling component of this transformation.

Parameters:

[out] scale Storage for the scale of the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::setScale ( const double scale[3] )

Set the scaling component of this transformation.

Parameters:

[in] scale The scale of the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::scaleBy ( const double scale[3] )

Relatively scale this transformation.

Parameters:

[in] scale The ratio by which to scale the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::getShear ( double shear[3] ) const

Retrieve the shearing component of this transformation.

Parameters:

[out] shear Storage for the shear of the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::setShear ( const double shear[3] )

Set the shearing component of this transformation.

Parameters:

[in] shear The shear of the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::shearBy ( const double shear[3] )

Relatively shear this transformation.

Parameters:

[in] shear The ratio by which to shear the transform

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::getRotation	(	MQuaternion &	quaternion,
		MSpace::Space	space = `MSpace::kTransform`
	)			const

Retrieve the rotation component of this transformation as a quaternion. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kWorld. All other spaces are treated as being equivalent to MSpace::kTransform.

Parameters:

`[out]`	quaternion	the quaternion
`[in]`	space	transform space in which to get the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::setRotation	(	const MQuaternion &	quaternion,
		MSpace::Space	space = `MSpace::kTransform`
	)

Change the rotation component of this transformation using a quaternion. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kWorld. All other spaces are treated as being equivalent to MSpace::kTransform.

Parameters:

`[in]`	quaternion	the quaternion
`[in]`	space	transform space in which to perform the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::rotateBy	(	const MQuaternion &	quaternion,
		MSpace::Space	space = `MSpace::kTransform`
	)

Relatively change the rotation of this transformation using a quaternion.

Parameters:

`[in]`	quaternion	the quaternion
`[in]`	space	transform space in which to perform the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::getRotation ( MEulerRotation & rotation ) const

Retrieve the rotation component of this transformation. The rotation is retrieved in MSpace::kTransform space.

Parameters:

[out] rotation the euler rotation in radians

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::setRotation ( const MEulerRotation & rotation )

Change the rotation component of this transformation. The rotation is set in MSpace::kTransform space.

Parameters:

[in] rotation the euler rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::rotateBy	(	const MEulerRotation &	rotation,
		MSpace::Space	space = `MSpace::kTransform`
	)

Relatively change the rotation component of this transformation.

Parameters:

[in] rotation the euler rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::getRotationQuaternion	(	double &	x,
		double &	y,
		double &	z,
		double &	w,
		MSpace::Space	space = `MSpace::kTransform`
	)			const

Retrieve the rotation component of this transformation as a quaternion. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kWorld. All other spaces are treated as being equivalent to MSpace::kTransform.

Parameters:

`[out]`	x	storage for the x component of the quaternion
`[out]`	y	storage for the y component of the quaternion
`[out]`	z	storage for the z component of the quaternion
`[out]`	w	storage for the w component of the quaternion
`[in]`	space	transform space in which to get the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::setRotationQuaternion	(	double	x,
		double	y,
		double	z,
		double	w,
		MSpace::Space	space = `MSpace::kTransform`
	)

Change the rotation component of this transformation using a quaternion. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kWorld. All other spaces are treated as being equivalent to MSpace::kTransform.

Parameters:

`[in]`	x	x component of the quaternion
`[in]`	y	y component of the quaternion
`[in]`	z	z component of the quaternion
`[in]`	w	w component of the quaternion
`[in]`	space	transform space in which to perform the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::rotateByQuaternion	(	double	x,
		double	y,
		double	z,
		double	w,
		MSpace::Space	space = `MSpace::kTransform`
	)

Relatively change the rotation of this transformation using a quaternion.

Parameters:

`[in]`	x	x component of the quaternion
`[in]`	y	y component of the quaternion
`[in]`	z	z component of the quaternion
`[in]`	w	w component of the quaternion
`[in]`	space	transform space in which to perform the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::getRotation	(	double	rotation[3],
		MTransformationMatrix::RotationOrder &	order
	)			const

Retrieve the rotation component of this transformation. The rotation is retrieved in MSpace::kTransform space.

Parameters:

`[out]`	rotation	storage for the rotation components
`[in]`	order	storage for the order of rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::setRotation	(	const double	rotation[3],
		MTransformationMatrix::RotationOrder	order
	)

Change the rotation component of this transformation. The rotation is set in MSpace::kTransform space.

Parameters:

`[in]`	rotation	the new rotation components
`[in]`	order	the order in which to apply the rotations

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kFailure object error

MStatus MFnTransform::rotateBy	(	const double	rotation[3],
		MTransformationMatrix::RotationOrder	order,
		MSpace::Space	space = `MSpace::kTransform`
	)

Relatively change the rotation component of this transformation.

Parameters:

`[in]`	rotation	the relative rotation components
`[in]`	order	the order in which to apply the rotations
`[in]`	space	transform space in which to perform the rotation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MVector MFnTransform::getTranslation	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Retrieve the translation component of this transformation in centimeters.

Parameters:

`[in]`	space	transform space in which to get the translation
`[out]`	ReturnStatus	return status

Returns:: Translation vector in centimeters

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::setTranslation	(	const MVector &	vector,
		MSpace::Space	space
	)

Change the translation component of this transformation.

Parameters:

`[in]`	vector	the new translation vector in centimeters
`[in]`	space	transform space in which to perform the translation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::translateBy	(	const MVector &	vector,
		MSpace::Space	space
	)

Relatively change the translation component of this transformation.

Parameters:

`[in]`	vector	the relative translation vector
`[in]`	space	transform space in which to perform the translation

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MPoint MFnTransform::scalePivot	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Returns the pivot around which the scale is applied. The pivot will be in centimeters.

Parameters:

`[in]`	space	space in which to get the pivot
`[out]`	ReturnStatus	return status

Returns:: Scale pivot point in centimeters

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MStatus MFnTransform::setScalePivot	(	const MPoint &	point,
		MSpace::Space	space,
		bool	balance
	)

Set the pivot around which the scale is applied in centimeters.

If balance if true, then the overall transformation matrix will not change and a compensating transformation will be added to the scale pivot translation to to compensate for the new scale pivot.

Parameters:

`[in]`	point	new scale pivot in centimeters
`[in]`	space	transform space in which to set the scale pivot
`[in]`	balance	whether to balance the matrix

Returns:: Return status

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MVector MFnTransform::scalePivotTranslation	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Returns the scale pivot translation in centimeters. This component is used as a compensation by maya when the user moves the scale pivot, or when the balance flag is set to true in the MfnTransform::setScalePivot method. The scale pivot translation serves as a compensation that allows existing transformations to be preserved when the scale pivot is modified. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

Parameters:

`[in]`	space	space in which to get the scale pivot translation
`[out]`	ReturnStatus	return status

Returns:: Scale pivot translation in centimeters

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MStatus MFnTransform::setScalePivotTranslation	(	const MVector &	vector,
		MSpace::Space	space
	)

Set the scale pivot translation in centimeters. This component is used internally by maya when the user moves the scale pivot, or when the balance flag is set to true in the MfnTransform::setScalePivot method. It serves as a compensation that allows existing transformations to be preserved when the scale pivot is modified. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

Parameters:

`[in]`	vector	new scale pivot translation in centimeters
`[in]`	space	transform space in which to set the scale translation

Returns:: Return status

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MPoint MFnTransform::rotatePivot	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Returns the pivot about which the rotation is applied.

Parameters:

`[in]`	space	space in which to get the pivot
`[out]`	ReturnStatus	return status

Returns:: Rotation pivot point in centimeters

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MStatus MFnTransform::setRotatePivot	(	const MPoint &	point,
		MSpace::Space	space,
		bool	balance
	)

Set the rotate pivot in centimeters about which rotation is applied.

If balance if true, then the overall transformation matrix will not change and a compensating transformation will be added to the rotate translate pivot to compensate for the pivot modification.

Parameters:

`[in]`	point	new rotation pivot in centimeters
`[in]`	space	transform space in which to set the pivot
`[in]`	balance	whether to balance the matrix

Returns:: Return status

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MVector MFnTransform::rotatePivotTranslation	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Return the rotate pivot translation in centimeters. This component is used internally by maya when the user moves the rotate pivot, or when the balance flag is set to true in the MfnTransform::setRotatePivot method. It serves as a compensation that allows existing transformations to be preserved. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

Parameters:

`[in]`	space	space in which to get the pivot translation
`[out]`	ReturnStatus	return status

Returns:: Scale pivot translation in centimeters

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MStatus MFnTransform::setRotatePivotTranslation	(	const MVector &	vector,
		MSpace::Space	space
	)

Set the rotate pivot translation in centimeters. This component is used internally by maya when the user moves the rotate pivot, or when the balance flag is true in the MFnTransform::setRotatePivot method. It serves as a compensation that allows existing transformations to be preserved when the rotate pivot is modified. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

Parameters:

`[in]`	vector	new rotation pivot translation in centimeters
`[in]`	space	transform space in which to set the rotation pivot translation

Returns:: Return status

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MQuaternion MFnTransform::rotateOrientation	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

Returns the rotation used to orient the local rotation space. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

Parameters:

`[in]`	space	space in which to get the rotation orientation. This argument is currently ignored. The rotateOrientation is always returned in local space: MSpace::kTransform.
`[out]`	ReturnStatus	return status

Returns:: Rotateorientation

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MStatus MFnTransform::setRotateOrientation	(	const MQuaternion &	quat,
		MSpace::Space	space,
		bool	balance
	)

Set the rotation used to orient the local rotation space. For the precise mathematics, refer to the transformation matrix details in the description section of MFnTransform.

If balance if true, then the overall transformation matrix will not change and the rotation will be modified to achieve this.

Parameters:

`[in]`	quat	new orientation as a quaternion
`[in]`	space	transform space in which to set the rotateOrientation. This argument is currently ignored. The rotateOrientation always set in local space: MSpace::kTransform.
`[in]`	balance	whether to balance the overall transformation matrix

Returns:: Return status

Status Codes:

MS::kSuccess success
MS::kInvalidParameter invalid space
MS::kFailure object error

MTransformationMatrix::RotationOrder MFnTransform::rotationOrder ( MStatus * ReturnStatus = NULL ) const

Returns the rotation order for the transform matrix - the order in which the Euler angles are applied to create the end rotation.

Parameters:

[out] ReturnStatus return status

Returns:: rotation order

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::setRotationOrder	(	MTransformationMatrix::RotationOrder	order,
		bool	reorder
	)

Change the rotation order for the transform - the order in which the Euler angles are applied to create the end rotation.

Parameters:

`[in]`	order	the order in which to apply rotations
`[in]`	reorder	flag indicating whether or not rotations should be reordered.

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MTransformationMatrix MFnTransform::restPosition ( MStatus * ReturnStatus ) const

Retrieve the saved rest position of this transform.

Parameters:

[out] ReturnStatus status code

Returns:: The transformation matrix equivalent to the transform's rest position. This rest position will be identity unless the "setRestPosition" method has been called.

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::setRestPosition ( const MTransformationMatrix & matrix )

Change the saved rest position of this transform. The rest position is not used internally by Maya. It is exclusively for use from the API as a temporary cache, which can be set and restored within a single Maya session. Note that the rest position is not saved with the scene.

Parameters:

[in] matrix the new rest position for this transform

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::resetFromRestPosition ( )

Reset the transform to its rest position.

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::clearRestPosition ( )

Clear the saved rest position of this transform.

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::getRotation	(	double	rotation[3],
		MTransformationMatrix::RotationOrder &	order,
		MSpace::Space	space
	)			const

This method is obsolete.

Deprecated:: Use the other MFnTransform::getRotation method instead.

The transformation space argument was always treated as MSpace::kTransform regardless of the actual argument.

Retrieve the rotation component of this transformation.

Parameters:

`[out]`	rotation	Storage for the rotation components.
`[in]`	order	Storage for the order of rotation.
`[in]`	space	Ingored.

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MStatus MFnTransform::setRotation	(	const double	rotation[3],
		MTransformationMatrix::RotationOrder	order,
		MSpace::Space	space
	)

This method is obsolete.

Deprecated:: Use the other MFnTransform::setRotation method instead.

The transformation space argument was always treated as MSpace::kTransform regardless of the actual argument.

Change the rotation component of this transformation.

Parameters:

`[in]`	rotation	The new rotation components.
`[in]`	order	The order in which to apply the rotations.
`[in]`	space	Ignored.

Returns:: Status code

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

MVector MFnTransform::translation	(	MSpace::Space	space,
		MStatus *	ReturnStatus = `NULL`
	)			const

This method is obsolete.

Deprecated:: Use the method MFnTransform::getTranslation instead.

Retrieve the translation component of this transformation in centimeters.

Parameters:

`[in]`	space	Transform space in which to get the translation.
`[out]`	ReturnStatus	Return status.

Returns:: Translation vector in centimeters

Status Codes:

MS::kSuccess operation successful
MS::kInvalidParameter invalid transform space
MS::kFailure object error

bool MFnTransform::isLimited	(	MFnTransform::LimitType	type,
		MStatus *	ReturnStatus = `NULL`
	)			const

Determine if the specified limit attribute is enabled or disabled.

Parameters:

`[in]`	type	type to query limit
`[out]`	ReturnStatus	status code

Returns:: True or false, true means the limit is enabled.

Status Codes:

MS::kSuccess success
MS::kFailure object error

double MFnTransform::limitValue	(	MFnTransform::LimitType	type,
		MStatus *	ReturnStatus = `NULL`
	)			const

Determine the current value of the specified limit.

Parameters:

`[in]`	type	type to query limit
`[out]`	ReturnStatus	status code

Returns:: Current value of the specified limit as internal unit.

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::setLimit	(	MFnTransform::LimitType	type,
		double	value
	)

Change the limit value for the specified limit type, and automatically enable the limit to be true.

Parameters:

`[in]`	type	type to apply a limit
`[in]`	value	new limit value as internal unit

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MStatus MFnTransform::enableLimit	(	MFnTransform::LimitType	type,
		bool	flag
	)

Enable or disable the limit value for the specified limit type.

Parameters:

`[in]`	type	type to apply a limit
`[in]`	flag	true or false to enable

Returns:: status code

Status Codes:

MS::kSuccess success
MS::kFailure object error

MFnTransform Class Reference [OpenMaya - API module for common classes, FunctionSet classes]

Detailed Description

Public Types

Public Member Functions

Protected Member Functions

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

MFnTransform Class Reference
[OpenMaya - API module for common classes, FunctionSet classes]