MPxTransform Class Reference
[OpenMaya - API module for common classes, Proxy classes]

#include <MPxTransform.h>

Inheritance diagram for MPxTransform:

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Collaboration diagram for MPxTransform:

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List of all members.

Detailed Description

Base class for user defined transforms.

MPxTransform allows the creation of user defined transform nodes. User defined transform nodes can introduce new transform types or change the transformation order. They are designed to be an extension of the standard Maya transform node and include all of the normal transform attributes. Standard behaviors such as limit enforcement and attribute locking are managed by this class, but may be overriden in derived classes.

In general, a complete implementation of user defined transforms will require the deriving from two classes; MPxTransform defines the node while MPxTransformationMatrix describes the mathematical functions of the user defined transform.

The MPxTransform class is registered using the MFnPlugin::registerTransform() method. Both the MPxTransform and the MPxTransformationMatrix classes are registered in the same method. This allows for a clear association between a MPxTransform and a MPxTransformationMatrix. Both the MPxTransform and the MPxTransformationMatrix classes need unique MTypeIds.

MPxTransform nodes are DAG nodes and therefore a change to one element will affect every node beneath the changed node. Since this can involve quite a bit of calculation, DAG nodes internally handle clean and dirty differently than other nodes. What this means is that the updateMatrixAttrs() method should be used when getting one of the matrix attributes from a method on this node. Additionally, after a value is changed, the appropriate dirty method (i.e. dirtyTranslate(), dirtyRotate(), etc.) should be called. When in doubt, dirtyMatrix() will flag everything as needing to be updated.

It is up to each transform node to determine if it will obey limits or Since transform attributes may have limits or may be involved in some sort of constraint, there needs to be a way to accept, reject, or modify a value when a plug is set on the node. The mustCallValidateAndSet() method allows for this kind of control. When an attribute is flagged with the mustCallValidateAndSet() method in the initialize() method, every plug change will call the validateAndSetValue() method for approval. From the validateAndSetValue() method things like limits and value locking can be enforced. It is important to note that for new attributes on the transform node, any locking or limits are left as an implementation detail.

If any of the public methods are affected by the addition of transform components, or by the order of computation, they should be overriden in the derived class. Many of the public methods are used by internal Maya code and exist for more than just convenience.

The createTransformationMatrix() class must be overloaded if a transformation matrix other than the default MPxTransformationMatrix is used.

NOTES: 1) The setDependentsDirty() virtual method is available in this class since MPxTransform derives from MPxNode. During a call to MPxTransform::setDependentsDirty(), a plug-in should not invoke any of the dirty*() or updateMatrixAttrs() calls of this class. For example, the methods dirtyMatrix(), dirtyTranslation() or updateMatrixAttrs() should not be called. 2) Updating world space attributes is an expensive operation. Maya updates world space attributes on demand such as in the case of a getAttr being issued or a connection exists for the attribute.

Examples:

rockingTransform.h.


Public Member Functions

 MPxTransform ()
 MPxTransform (MPxTransformationMatrix *)
virtual ~MPxTransform ()
virtual void postConstructor ()
virtual MPxNode::Type type () const
virtual MPxTransformationMatrix * createTransformationMatrix ()
virtual bool isBounded () const
virtual MBoundingBox boundingBox () const
const MPxTransformationMatrix & transformationMatrix () const
MPxTransformationMatrix * transformationMatrixPtr () const
virtual void resetTransformation (const MMatrix &)
virtual void resetTransformation (MPxTransformationMatrix *)
virtual MStatus compute (const MPlug &plug, MDataBlock &data)
virtual MStatus computeLocalTransformation (MPxTransformationMatrix *, MDataBlock &)
virtual MStatus clearLimits ()
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)
virtual MStatus validateAndSetValue (const MPlug &, const MDataHandle &, const MDGContext &)
virtual MMatrix getMatrix (const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MMatrix getMatrixInverse (const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MVector getTranslation (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus translateTo (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus translateBy (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MQuaternion getRotation (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MEulerRotation getEulerRotation (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus rotateTo (const MQuaternion &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus rotateBy (const MQuaternion &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus rotateTo (const MEulerRotation &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus rotateBy (const MEulerRotation &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MVector getScale (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus scaleTo (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus scaleBy (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MVector getShear (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus shearTo (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus shearBy (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MPoint getScalePivot (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MPoint getRotatePivot (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MVector getScalePivotTranslation (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MVector getRotatePivotTranslation (MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus setScalePivot (const MPoint &, MSpace::Space=MSpace::kTransform, bool balance=true, const MDGContext &=MDGContext::fsNormal)
virtual MStatus setScalePivotTranslation (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual MStatus setRotatePivot (const MPoint &, MSpace::Space=MSpace::kTransform, bool balance=true, const MDGContext &=MDGContext::fsNormal)
virtual MStatus setRotatePivotTranslation (const MVector &, MSpace::Space=MSpace::kTransform, const MDGContext &=MDGContext::fsNormal)
virtual
MTransformationMatrix::RotationOrder 		getRotationOrder (const MDGContext &apiContext=MDGContext::fsNormal)
virtual MStatus setRotationOrder (MTransformationMatrix::RotationOrder ro, bool reorder=true, const MDGContext &apiContext=MDGContext::fsNormal)
virtual MQuaternion getRotateOrientation (MSpace::Space apiSpace=MSpace::kTransform, const MDGContext &apiContext=MDGContext::fsNormal, MStatus *ReturnStatus=NULL)
virtual MStatus setRotateOrientation (const MQuaternion &q, MSpace::Space apiSpace=MSpace::kTransform, bool balance=true, const MDGContext &apiContext=MDGContext::fsNormal)
void updateMatrixAttrs (const MDGContext &apiContext=MDGContext::fsNormal)
MStatus updateMatrixAttrs (MObject &attr, const MDGContext &context=MDGContext::fsNormal)
virtual void copyInternalData (MPxNode *)

Static Public Member Functions

static void mustCallValidateAndSet (MObject &)
static MStatus setNonAffineMatricesEnabled (bool)
static bool isNonAffineMatricesEnabled (MStatus *ReturnStatus)

Static Public Attributes

static MObject nodeBoundingBox
 bounding box attribute
static MObject nodeBoundingBoxMin
 bounding box minimum point
static MObject nodeBoundingBoxMinX
 X component of nodeBoundingBoxMin.
static MObject nodeBoundingBoxMinY
 Y component of nodeBoundingBoxMin.
static MObject nodeBoundingBoxMinZ
 Z component of nodeBoundingBoxMin.
static MObject nodeBoundingBoxMax
 bounding box maximum point
static MObject nodeBoundingBoxMaxX
 X component of nodeBoundingBoxMax.
static MObject nodeBoundingBoxMaxY
 Y component of nodeBoundingBoxMax.
static MObject nodeBoundingBoxMaxZ
 Z component of nodeBoundingBoxMax.
static MObject nodeBoundingBoxSize
 bounding box size vector
static MObject nodeBoundingBoxSizeX
 X component of nodeBoundingBoxSize.
static MObject nodeBoundingBoxSizeY
 Y component of nodeBoundingBoxSize.
static MObject nodeBoundingBoxSizeZ
 Z component of nodeBoundingBoxSize.
static MObject center
 object center attribute
static MObject boundingBoxCenterX
 X component of the bounding box center.
static MObject boundingBoxCenterY
 Y component of the bounding box center.
static MObject boundingBoxCenterZ
 Z component of the bounding box center.
static MObject matrix
 matrix attribute
static MObject inverseMatrix
 inverse matrix attribute
static MObject worldMatrix
 world matrix attribute
static MObject worldInverseMatrix
 Inverse world matrix attribute.
static MObject parentMatrix
 Parent matrix attribute.
static MObject parentInverseMatrix
 Inverse parent matrix attribute.
static MObject visibility
 Visibility attribute.
static MObject intermediateObject
 Intermediate object attribute.
static MObject isTemplated
 Template attribute.
static MObject ghosting
 Ghosting attribute.
static MObject instObjGroups
 Instances object group info attribute.
static MObject objectGroups
 Object groups attributes.
static MObject objectGrpCompList
 Component in object groups attribute.
static MObject objectGroupId
 Group id attribute.
static MObject objectGroupColor
 Group id attribute.
static MObject useObjectColor
 Controls choice of wireframe dormant object color.
static MObject objectColor
 The per object dormant wireframe color.
static MObject renderInfo
 Obsolete attribute.
static MObject identification
 Obsolete attribute.
static MObject layerRenderable
 Obsolete attribute.
static MObject layerOverrideColor
 Obsolete attribute.
static MObject renderLayerInfo
 Render layer attribute.
static MObject renderLayerId
 Render layer attribute.
static MObject renderLayerRenderable
 Render layer attribute.
static MObject renderLayerColor
 Render layer attribute.
static MObject translate
 translate attribute
static MObject translateX
 translateX attribute
static MObject translateY
 translateY attribute
static MObject translateZ
 translateZ attribute
static MObject rotate
 rotate attribute
static MObject rotateX
 rotateX attribute
static MObject rotateY
 rotateY attribute
static MObject rotateZ
 rotateZ attribute
static MObject rotateOrder
 Rotate order attribute.
static MObject scale
 scale attribute
static MObject scaleX
 scaleX attribute
static MObject scaleY
 scaleY attribute
static MObject scaleZ
 scaleZ attribute
static MObject shearXY
 shearXY attribute
static MObject shearXZ
 shearXZ attribute
static MObject shearYZ
 shearYZ attribute
static MObject rotatePivot
 rotate pivot attribute
static MObject rotatePivotX
 rotate pivot X attribute
static MObject rotatePivotY
 rotate pivot Y attribute
static MObject rotatePivotZ
 rotate pivot Z attribute
static MObject rotatePivotTranslate
 rotate pivot translate attribute
static MObject rotatePivotTranslateX
 rotate pivot translate X attribute
static MObject rotatePivotTranslateY
 rotate pivot translate Y attribute
static MObject rotatePivotTranslateZ
 rotate pivot translate Z attribute
static MObject scalePivot
 scale pivot attribute
static MObject scalePivotX
 scale pivot X attribute
static MObject scalePivotY
 scale pivot Y attribute
static MObject scalePivotZ
 scale pivot Z attribute
static MObject scalePivotTranslate
 Scale pivot translate attribute.
static MObject scalePivotTranslateX
 scale pivot translate X attribute
static MObject scalePivotTranslateY
 scale pivot translate Y attribute
static MObject scalePivotTranslateZ
 scale pivot translate Z attribute
static MObject rotateAxis
 Rotate orientation attribute.
static MObject rotateAxisX
 rotate orientation X attribute
static MObject rotateAxisY
 rotate orientation Y attribute
static MObject rotateAxisZ
 rotate orientation Z attribute
static MObject transMinusRotatePivot
 translate minus rotate pivot attribute
static MObject transMinusRotatePivotX
 translateX minus rotate pivotX attribute
static MObject transMinusRotatePivotY
 translateY minus rotate pivotY attribute
static MObject transMinusRotatePivotZ
 translateZ minus rotate pivotZ attribute
static MObject minTransLimit
 Minumum translation limits attribute.
static MObject minTransXLimit
 Minimum translate X limit attribute.
static MObject minTransYLimit
 Minimum translate Y limit attribute.
static MObject minTransZLimit
 Minimum translate Z limit attribute.
static MObject maxTransLimit
 Maximum translation limits attribute.
static MObject maxTransXLimit
 Maximum translate X limit attribute.
static MObject maxTransYLimit
 Maximum translate Y limit attribute.
static MObject maxTransZLimit
 Maximum translate Z limit attribute.
static MObject minTransLimitEnable
 Enable the mimimum translation limits attribute.
static MObject minTransXLimitEnable
 Enable the minimum translate X limit attribute.
static MObject minTransYLimitEnable
 Enable the minimum translate Y limit attribute.
static MObject minTransZLimitEnable
 Enable the minimum translate Z limit attribute.
static MObject maxTransLimitEnable
 Enable the maximum translation limits attribute.
static MObject maxTransXLimitEnable
 Enable the maximum translate X limit attribute.
static MObject maxTransYLimitEnable
 Enable the maximum translate Y limit attribute.
static MObject maxTransZLimitEnable
 Enable the maximum translate Z limit attribute.
static MObject minRotLimit
 Minimum rotation limits attribute.
static MObject minRotXLimit
 Minimum rotate X limit attribute.
static MObject minRotYLimit
 Minimum rotate Y limit attribute.
static MObject minRotZLimit
 Minimum rotate Z limit attribute.
static MObject maxRotLimit
 Maximum rotation limits attribute.
static MObject maxRotXLimit
 Maximum rotate X limit attribute.
static MObject maxRotYLimit
 Maximum rotate Y limit attribute.
static MObject maxRotZLimit
 Maximum rotate Z limit attribute.
static MObject minRotLimitEnable
 Enable minimum rotation limits attribute.
static MObject minRotXLimitEnable
 Enable minimum rotate X limit attribute.
static MObject minRotYLimitEnable
 Enable minimum rotate Y limit attribute.
static MObject minRotZLimitEnable
 Enable minimum rotate Z limit attribute.
static MObject maxRotLimitEnable
 Enable maximum rotation limits attribute.
static MObject maxRotXLimitEnable
 Enable maximum rotate X limit attribute.
static MObject maxRotYLimitEnable
 Enable maximum rotate Y limit attribute.
static MObject maxRotZLimitEnable
 Enable maximum rotate Z limit attribute.
static MObject minScaleLimit
 Minimum scale limit attribute.
static MObject minScaleXLimit
 Minimum scale X limit attribute.
static MObject minScaleYLimit
 Minimum scale Y limit attribute.
static MObject minScaleZLimit
 Minimum scale Z limit attribute.
static MObject maxScaleLimit
 Maximum scale limit attribute.
static MObject maxScaleXLimit
 Maximum scale X limit attribute.
static MObject maxScaleYLimit
 Maximum scale Y limit attribute.
static MObject maxScaleZLimit
 Maximum scale Z limit attribute.
static MObject minScaleLimitEnable
 Enable minimum scale limit attribute.
static MObject minScaleXLimitEnable
 Enable minimum scale X limit attribute.
static MObject minScaleYLimitEnable
 Enable minimum scale Y limit attribute.
static MObject minScaleZLimitEnable
 Enable minimum scale Z limit attribute.
static MObject maxScaleLimitEnable
 Enable aximum scale limit attribute.
static MObject maxScaleXLimitEnable
 Enable maximum scale X limit attribute.
static MObject maxScaleYLimitEnable
 Enable maximum scale Y limit attribute.
static MObject maxScaleZLimitEnable
 Enable maximum scale Z limit attribute.

Protected Member Functions

virtual MVector applyTranslationLimits (const MVector &unclampedT, MDataBlock &block, MStatus *ReturnStatus=NULL)
virtual MVector applyTranslationLocks (const MVector &toTest, const MVector &savedT, MStatus *ReturnStatus=NULL)
virtual MEulerRotation applyRotationLimits (const MEulerRotation &unclampedR, MDataBlock &block, MStatus *ReturnStatus=NULL)
virtual MEulerRotation applyRotationLocks (const MEulerRotation &toTest, const MEulerRotation &savedR, MStatus *ReturnStatus=NULL)
virtual MVector applyScaleLimits (const MVector &unclampedS, MDataBlock &block, MStatus *ReturnStatus=NULL)
virtual MVector applyScaleLocks (const MVector &toTest, const MVector &savedS, MStatus *ReturnStatus=NULL)
virtual MVector applyShearLocks (const MVector &toTest, const MVector &savedSh, MStatus *ReturnStatus=NULL)
virtual MEulerRotation applyRotateOrientationLocks (const MEulerRotation &toTest, const MEulerRotation &savedRO, MStatus *ReturnStatus=NULL)
virtual MVector applyScaleLocksPivot (const MPoint &toTest, const MPoint &savedSP, MStatus *ReturnStatus=NULL)
virtual MVector applyRotatePivotLocks (const MPoint &toTest, const MPoint &savedRP, MStatus *ReturnStatus=NULL)
virtual MVector applyScaleLocksPivotTranslate (const MVector &toTest, const MVector &savedSPT, MStatus *ReturnStatus=NULL)
virtual MVector applyRotatePivotLocksTranslate (const MVector &toTest, const MVector &savedRPT, MStatus *ReturnStatus=NULL)
MStatus dirtyMatrix ()
 USE _dirtyMatrix() IN SCRIPT.
MStatus dirtyTranslation (const MVector &)
 USE _dirtyTranslation() IN SCRIPT.
MStatus dirtyRotation (const MEulerRotation &)
 USE _dirtyRotation() IN SCRIPT.
MStatus dirtyScale (const MVector &)
 USE _dirtyScale() IN SCRIPT.
MStatus dirtyShear (const MVector &)
 USE _dirtyShear() IN SCRIPT.
MStatus dirtyRotateOrientation (const MEulerRotation &)
 USE _dirtyRotateOrientation() IN SCRIPT.
MStatus dirtyScalePivot (const MPoint &)
 USE _dirtyScalePivot() IN SCRIPT.
MStatus dirtyRotatePivot (const MPoint &)
 USE _dirtyRotatePivot() IN SCRIPT.
MStatus dirtyScalePivotTranslation (const MVector &)
 USE _dirtyScalePivotTranslation() IN SCRIPT.
MStatus dirtyRotatePivotTranslation (const MVector &)
 USE _dirtyRotatePivotTranslation() IN SCRIPT.
virtual MStatus checkAndSetTranslation (MDataBlock &block, const MPlug &, const MVector &, MSpace::Space=MSpace::kTransform)
virtual MStatus checkAndSetRotation (MDataBlock &block, const MPlug &, const MEulerRotation &, MSpace::Space=MSpace::kTransform)
virtual MStatus checkAndSetScale (MDataBlock &block, const MPlug &, const MVector &, MSpace::Space=MSpace::kTransform)
virtual MStatus checkAndSetShear (MDataBlock &block, const MPlug &, const MVector &, MSpace::Space=MSpace::kTransform)
virtual MStatus checkAndSetRotateOrientation (MDataBlock &block, const MPlug &, const MEulerRotation &, MSpace::Space=MSpace::kTransform, bool balance=true)
virtual MStatus checkAndSetRotatePivot (MDataBlock &, const MPlug &, const MPoint &, MSpace::Space=MSpace::kTransform, bool balance=true)
virtual MStatus checkAndSetRotatePivotTranslation (MDataBlock &, const MPlug &, const MVector &, MSpace::Space=MSpace::kTransform)
virtual MStatus checkAndSetScalePivot (MDataBlock &, const MPlug &, const MPoint &, MSpace::Space=MSpace::kTransform, bool=true)
virtual MStatus checkAndSetScalePivotTranslation (MDataBlock &, const MPlug &, const MVector &, MSpace::Space=MSpace::kTransform)

Constructor & Destructor Documentation

MPxTransform::MPxTransform (  ) 

Class constructor.

MPxTransform::MPxTransform ( MPxTransformationMatrix *  tm  ) 

Class constructor. The passed pointer to a MPxTransformationMatrix derived object will be used for the transformation matrix calculation. This class will assume responsibility to delete this memory.

Parameters:
[in] tm A pointer to a MPxTransformationMatrix derived object.

MPxTransform::~MPxTransform (  )  [virtual]

Class destructor.

Member Function Documentation

void MPxTransform::postConstructor (  )  [virtual]

Post constructor.

Internally maya creates two objects when a user defined node is created, the internal MObject and the user derived object. The association between the these two objects is not made until after the MPxNode constructor is called. This implies that no MPxNode member function can be called from the MPxNode constructor. The postConstructor will get called immediately after the constructor when it is safe to call any MPxNode member function.

Reimplemented from MPxNode.

Examples:
rockingTransform.h.

MPxNode::Type MPxTransform::type (  )  const [virtual]

This method returns the type of the node. This method should not be overridden by the user. It will return MPxNode::kTransformNode.

Returns:
An enum specifying the node type.
Status Codes:

Reimplemented from MPxNode.

MPxTransformationMatrix * MPxTransform::createTransformationMatrix (  )  [virtual]

This method returns a new transformation matrix. The function that calls this method is responsible for deleting the transformation matrix.

If a derived MPxTransformationMatrix is used as the transformation matrix for the node, then this method must be overridden.

Returns:
A pointer to the new transformation matrix.
Examples:
rockingTransform.h.

bool MPxTransform::isBounded (  )  const [virtual]

This method should be overridden to return true if the user supplies a bounding box routine. Supplying a bounding box routine makes refresh and selection more efficient.

Returns:
A boolean value indicating whether a bounding box routine has been supplied.

MBoundingBox MPxTransform::boundingBox (  )  const [virtual]

This method should be overridden to return a bounding box for the transform. If this method is overridden, then MPxTransform::isBounded should also be overridden to return true.

Returns:
The bounding box of the transform.

const MPxTransformationMatrix & MPxTransform::transformationMatrix (  )  const

This method returns a reference to the transformation matrix used by this transform.

Returns:
The transformation matrix.

MPxTransformationMatrix * MPxTransform::transformationMatrixPtr (  )  const

This function returns the associated transformation matrix.

void MPxTransform::resetTransformation ( const MMatrix &  matrix  )  [virtual]

This method will reset the transformation matrix to one that is constructed with the passed MMatrix. How the new transformation matrix is created will depend on the transformation matrix class and its decomposeMatrix() method.

Parameters:
[in] matrix The matrix used for resetting this transform.
Examples:
rockingTransform.h.

void MPxTransform::resetTransformation ( MPxTransformationMatrix *  xform  )  [virtual]

This method will reset the transformation matrix to the one specified by the passed transformation matrix pointer. The contents of the passed transformation matrix are copied into this class's transformation matrix.

Parameters:
[in] xform A pointer to the source transformation matrix.

MStatus MPxTransform::compute ( const MPlug &  plug,
MDataBlock &  block 
) [virtual]

The transform's compute method. The compute method should call any supporting methods to proper handle limits as well as the cases where the plug's value should not change. The MPlug::isFreeToChange() method is used to determine if a plug's value may be changed.

When the compute method on derived classes is invoked for an attribute not handled by the derived class, the derived class should call MPxTransform::compute to allow the base classes to handle the attribute.

Parameters:
[in] plug The plug to compute.
[in] block The data block.
Returns:
Status code.
Status Codes:

Reimplemented from MPxNode.

MStatus MPxTransform::computeLocalTransformation ( MPxTransformationMatrix *  xform,
MDataBlock &  block 
) [virtual]

This method computes the transformation matrix for a passed data block and places the output into a passed transformation matrix.

The caller needs to allocate space for the passed transformation matrix.

Parameters:
[in] xform The transformation matrix to fill with computed values.
[in] block The data block used for the transformation matrix computation.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::clearLimits (  )  [virtual]

This method turns off all of the limits and sets them to their default values. Before this method is called, the base class clears all of the limits on the standard transform attributes, so this method only needs to be implemented for custom transform attributes.

Returns:
Return status.
Status Codes:

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

Determine if the specified limit attribute is enabled or disabled.

Parameters:
[in] type An enum specifying the type of limit to query.
[out] ReturnStatus Status.
Returns:
Returns true if the limit is enabled, otherwise false is returned.
Status Codes:

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

Returns the current value of the specified limit in internal units as a double.

Parameters:
[in] type An enum indicating the type of limit to query.
[out] ReturnStatus Status.
Returns:
Returns the current value of the specified limit in internal units as a double.
Status Codes:

MStatus MPxTransform::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 An enum indicating the limit to set.
[in] value The new limit value in internal units (centimeters or radians).
Returns:
Status code.
Status Codes:

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

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

Parameters:
[in] type An enum indicating the limit to enable or disable.
[in] flag The enable value; true will enable while false will disable the limit.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::validateAndSetValue ( const MPlug &  plug,
const MDataHandle &  handle,
const MDGContext &  context 
) [virtual]

When a plug's value is set, and the plug is on a default transform attribute, or has been flagged by the mustCallValidateAndSet() method, then this method will be called. The purpose of validateAndSetValue() is to enforce limits, constraints, or plug value locking.

If the plug passed into this method is not an attribute related to the derived class, the derived class should call the validateAndSetValue method of its parent class in order to allow the base classes to handle their attributes.

If any adjustments or corrections are required, they are placed in the data block and if the context is normal, into the cached transformation matrix. Values on the data block are in transform space.

Parameters:
[in] plug The plug that is to be set.
[in] handle The inputValue handle of the data.
[in] context The context for the data.
Returns:
Status code.
Status Codes:
Examples:
rockingTransform.h.

MMatrix MPxTransform::getMatrix ( const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns a 4x4 matrix that is produced by applying all of the components of the transform.

Parameters:
[in] context The context for getting the matrix.
[out] ReturnStatus Return status.
Returns:
The transform as a MMatrix.
Status Codes:

MMatrix MPxTransform::getMatrixInverse ( const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the inverse of the 4x4 matrix that describes this transformation.

Parameters:
[in] context The context for getting the inverse MMatrix.
[out] ReturnStatus Return status.
Returns:
The inverse of the transform as a MMatrix.
Status Codes:

MVector MPxTransform::getTranslation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the translation component of the transform as a MVector in internal units (centimeters).

Parameters:
[in] space The space used for setting the translation.
[in] context The context used for setting the translation.
[out] ReturnStatus Return status.
Returns:
The translation MVector in internal units (centimeters).
Status Codes:

MStatus MPxTransform::translateTo ( const MVector &  newTrans,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Set the translation component of the transform in centimeters.

Parameters:
[in] newTrans The new translation component in centimeters.
[in] space The space in which to perform the translation.
[in] context The context of the translation.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::translateBy ( const MVector &  transOffset,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Add to the translation component by translating relative to the existing transform. The transform value should be in internal units (centimeters).

Parameters:
[in] transOffset The relative translation value in centimeters.
[in] space The space in which to perform the translation.
[in] context The context for the translation.
Returns:
Status code.
Status Codes:

MQuaternion MPxTransform::getRotation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the rotation of the transform as a quaternion. The rotation is returned in MSpace::kTransform space. If an invalid space is used, MQuaternion::identity will be returned.

Parameters:
[in] space The space used for getting the rotate value.
[in] context The context used for getting the rotate value.
[out] ReturnStatus Return status.
Returns:
The rotate component of the transform as a quaternion.
Status Codes:

MEulerRotation MPxTransform::getEulerRotation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

Returns the rotation component of the transform as a euler rotation. The rotation is returned in MSpace::kTransform space. If an invalid space is used, MEulerRotation::identity will be returned.

Parameters:
[in] space The space used for getting the rotation.
[in] context The context used for getting the rotation.
[out] ReturnStatus Return status.
Returns:
The rotation component of the transform as an euler rotation.
Status Codes:

MStatus MPxTransform::rotateTo ( const MQuaternion &  newRot,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Sets the rotation component of the transform using a quaternion. The rotation is performed in MSpace::kTransform space. The transform's existing order of rotation is preserved.

Parameters:
[in] newRot The new rotation value as a quaternion.
[in] space The space of the passed rotation value.
[in] context The context used for setting the rotation.
Returns:
Return Status.
Status Codes:

MStatus MPxTransform::rotateBy ( const MQuaternion &  rotateOffset,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Adds to the rotation component of the transform by rotating relative to the existing transformation using a quaternion. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kPreTransform. All other spaces are treated as being equivalent to MSpace::kTransform. The transform's existing order of rotation is preserved.

Parameters:
[in] rotateOffset The relative rotation to apply to the transform.
[in] space The space of the passed rotation.
[in] context The context used for setting the rotation.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::rotateTo ( const MEulerRotation &  euler,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Sets the rotation component of the transform using an euler rotation. If the new rotation's order of rotation is different from that of the transform it will be reordered to match the transform.

Parameters:
[in] euler The new rotation value as an euler rotation.
[in] space The space of the passed rotation value.
[in] context The context used for setting the rotation.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::rotateBy ( const MEulerRotation &  euler,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Adds to the rotation component of the transform by rotating relative to the existing transform using a euler rotation. The only valid transformation spaces for this method are MSpace::kTransform and MSpace::kPreTransform/MSpacekObject. All other spaces are treated as being equivalent to MSpace::kTransform. If the supplied rotation's order of rotation is different from that of the transform, it will be reordered to match the transform before being added in.

Parameters:
[in] euler The rotation value of the relative euler rotation.
[in] space The space used for the relative rotation.
[in] context The context used for setting the rotation.
Returns:
Status code.
Status Codes:

MVector MPxTransform::getScale ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

Returns the scale component of the transform. If the space is invalid a <1.0, 1.0, 1.0> vector is returned.

Parameters:
[in] space The space used to get the scale.
[in] context The context used to get the scale.
[out] ReturnStatus The return status.
Returns:
A MVector holding the x, y, and z scale components
Status Codes:

MStatus MPxTransform::scaleTo ( const MVector &  newScale,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method will set the scale of the transform to the passed value.

Parameters:
[in] newScale A MVector holding the scale components.
[in] space The space of the passed scale value.
[in] context The context used for setting the scale.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::scaleBy ( const MVector &  scaleOffset,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method will apply a relative scale to an existing scale.

Parameters:
[in] scaleOffset A MVector holding the scale components.
[in] space The space of the passed scale values.
[in] context The context used for the scale.
Returns:
Status code.
Status Codes:

MVector MPxTransform::getShear ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

Get the shear value for this transform.

Parameters:
[in] space The space used for retrieving the shear value.
[in] context The context used for getting the shear value.
[out] ReturnStatus Return status.
Returns:
A MVector holding the xy, xz, yz values of shear.
Status Codes:

MStatus MPxTransform::shearTo ( const MVector &  newShear,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

The method sets the shear component of the transform.

Parameters:
[in] newShear A MVector holding the new shear value.
[in] space The space of the passed shear value.
[in] context The context used for setting the shear value.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::shearBy ( const MVector &  shearOffset,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method will apply a relative shear to the existing shear.

Parameters:
[in] shearOffset The relative shear value as a MVector.
[in] space The space of the passed shear value.
[in] context The context used for setting the shear.
Returns:
Status code.
Status Codes:

MPoint MPxTransform::getScalePivot ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the position of the pivot used by the scale component of the transform. The position is represented in internal units (centimeters).

Parameters:
[in] space The space used to get the scale pivot.
[in] context The context for getting the scale pivot.
[out] ReturnStatus Return status.
Returns:
A MPoint given the position of the scale pivot in centimeters.
Status Codes:

MPoint MPxTransform::getRotatePivot ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the position of the pivot used by the rotate component of the transform. The position is represented in internal units (centimeters).

  • space The space used to get the rotate pivot.
  • context The context for getting the rotate pivot.
  • ReturnStatus Return status.
Returns:
A MPoint given the position of the rotate pivot in centimeters.
Status Codes:

MVector MPxTransform::getScalePivotTranslation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the scale pivot translation in internal units (centimeters). The scale pivot translation is an offset applied to the transform to allow adjustments to the scale pivot to be made without changing the overall transform.

Parameters:
[in] space The spaced used to get the scale pivot translation.
[in] context The context for getting the scale pivot translation.
[out] ReturnStatus Return status.
Returns:
An MVector containing the value of the scale pivot translation in centimeters.
Status Codes:

MVector MPxTransform::getRotatePivotTranslation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

This method returns the rotate pivot translation in internal units (centimeters). The rotate pivot translation is an offset applied to the transform to allow adjustments to the rotate pivot to be made without changing the overall transform.

Parameters:
[in] space The spaced used to get the rotate pivot translation.
[in] context The context for getting the rotate pivot translation.
[out] ReturnStatus Return status.
Returns:
An MVector containing the value of the rotate pivot translation in centimeters.
Status Codes:

MStatus MPxTransform::setScalePivot ( const MPoint &  newSP,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method sets the position of the scale pivot. The position of the pivot is defined as a MPoint in internal units (centimeters).

If the balance argument is true, then the scale pivot translation will be adjusted such that the overall transform remains unchanged after the new scale pivot is set.

If an invalid space is used, the scale pivot will not change.

Parameters:
[in] newSP The position of the new scale pivot.
[in] space The space used to set the scale pivot.
[in] context The context used for setting the scale pivot.
Returns:
Return status.
Status Codes:

MStatus MPxTransform::setScalePivotTranslation ( const MVector &  newPT,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method sets the scale pivot translation in internal units (centimeters). The scale pivot translation is normally used to automatically compensate for changes in the scale pivot when the setScalePivot() method is used.

Parameters:
[in] newPT The scale pivot translation as a MVector.
[in] space The space used to set the scale pivot translation.
[in] context The context used in setting the scale pivot translation.
Returns:
Return status.
Status Codes:

MStatus MPxTransform::setRotatePivot ( const MPoint &  newRP,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method sets the position of the rotate pivot. The position of the pivot is defined as a MPoint in internal units (centimeters).

If the balance argument is true, then the rotate pivot translation will be adjusted such that the overall transform remains unchanged after the new rotate pivot is set.

If an invalid space is used, the rotate pivot will not change.

Parameters:
[in] newRP The position of the new rotate pivot.
[in] space The space used to set the rotate pivot.
[in] context The context used for setting the rotate pivot.
Returns:
Return status.
Status Codes:

MStatus MPxTransform::setRotatePivotTranslation ( const MVector &  newPT,
MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method sets the rotate pivot translation in internal units (centimeters). The rotate pivot translation is normally used to automatically compensate for changes in the rotate pivot when the setRotatePivot() method is used.

Parameters:
[in] newPT The rotate pivot translation as a MVector.
[in] space The space used to set the rotate pivot translation.
[in] context The context used in setting the rotate pivot translation.
Returns:
Return status.
Status Codes:

MTransformationMatrix::RotationOrder MPxTransform::getRotationOrder ( const MDGContext &  context = MDGContext::fsNormal  )  [virtual]

Returns the rotation order used by the rotation component of the transformation matrix.

Note that there are two different enumerations used to represent order of rotation: MTransformationMatrix::RotationOrder and MEulerRotation::RotationOrder. The actual value stored in the transform's rotateOrder attribute is an MEulerRotation::RotationOrder. The value returned by this method is the corresponding MTransformationMatrix::RotationOrder value. If you need to convert between these two rotation order representations use the MPxTransformationMatrix::convertTransformationRotationOrder and MPxTransformationMatrix::convertEulerRotationOrder methods.

Parameters:
[in] context The context for getting the rotation order.
Returns:
The MTransformationMatrix::RotationOrder enum describing the rotation order of the transform.

MStatus MPxTransform::setRotationOrder ( MTransformationMatrix::RotationOrder  ro,
bool  reorder = true,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

Sets the rotation order used by the rotation component of the transformation matrix.

See the getRotationOrder method for a discussion of the difference between MTransformationMatrix::RotationOrder values and MEulerRotation::RotationOrder values.

Parameters:
[in] ro The new rotation order as a MTransformationMatrix::RotationOrder enum.
[in] context The context for setting the rotation order.
Returns:
Return status.
Status Codes:

MQuaternion MPxTransform::getRotateOrientation ( MSpace::Space  space = MSpace::kTransform,
const MDGContext &  context = MDGContext::fsNormal,
MStatus *  ReturnStatus = NULL 
) [virtual]

Returns the rotate orientation for the transformation matrix as a quaternion. The rotate orientation is the value associated with the rotateAxis attribute on this node. The rotate orientation value is used to orient the local rotation space of the transform.

Parameters:
[in] space The space used for getting the rotate orientation.
[in] context The context for getting the rotate orientation.
[out] ReturnStatus Return status.
Returns:
A MQuaternion representing the rotate orientation.
Status Codes:

MStatus MPxTransform::setRotateOrientation ( const MQuaternion &  newRO,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true,
const MDGContext &  context = MDGContext::fsNormal 
) [virtual]

This method sets the rotate orientation for this transform. The rotate orientation is used to define the local rotation space. The rotate orientation is the value associated with the rotateAxis attribute on this node.

The balance argument allows the rotate orientation to be changed without affecting the overall transformation. The rotate value is adjusted to compensate for the change in rotate orientation.

Parameters:
[in] newRO The quaternion used to set the rotate orientation.
[in] space The space used when setting the rotate orientation.
[in] balance If true is used, then the rotation will change to compensate for the change in the rotate orientation.
[in] context The context used for setting the rotate orientation.
Returns:
Return status.
Status Codes:

void MPxTransform::updateMatrixAttrs ( const MDGContext &  context = MDGContext::fsNormal  ) 

This method is used only for the MPxTransform and MPxTransform derived classes. It will ensure that the values which change the resulting 4x4 matrix are current. It should be called before getting values that affect the matrix calculation.

If only a specific value needs to be updated, then use the updateMatrixAttrs(MObject &attr, const MDGContext &context) method.

Parameters:
[in] context The context to use when updating the values.

MStatus MPxTransform::updateMatrixAttrs ( MObject &  attr,
const MDGContext &  context = MDGContext::fsNormal 
)

This method ensures that a passed attribute will have its values current.

Parameters:
[in] attr The attribute.
[in] context The context to use.
Returns:
Return status.
Status Codes:

void MPxTransform::mustCallValidateAndSet ( MObject &  obj  )  [static]

This method must be called in the initialize() method for all attributes that affect the matrix of the transform. It will ensure that the matrix is properly calculated when the passed attribute is changed and that the validateAndSetValue method will get called for this attribute.

It is only for MPxTransform derived classes.

If a custom attribute on an MPxTransform derived classes is declared as "mustValidateAndSetValue", then the validateAndSetValue method must be implemented, so that it takes the data out of the data handle, and sets it into the datablock of the node.

Parameters:
[in] obj the attribute

MStatus MPxTransform::setNonAffineMatricesEnabled ( bool  enabled  )  [static]

Normal Maya transforms consist of translate, rotate, scale, and shear. All of these transform types produce an affine matrix. With MPxTransform it is possible to introduce non-affine matrices into places that previously did not consider their effects.

If non-affine matrices are enabled, then all calculations which require additional operations when handling non-affine matrices will perform the addition mathematical operations.

This is a static method and will affect all transforms when enabled.

Parameters:
[in] enabled If true, then non-afine calculations will be used.
Returns:
Return status
Status Codes:

bool MPxTransform::isNonAffineMatricesEnabled ( MStatus *  ReturnStatus  )  [static]

This method returns true is non-affine matrix calculations are being used for transforms.

Parameters:
[out] ReturnStatus The status
Returns:
true if non-affine matrix calculations are enabled.
Status Codes:

void MPxTransform::copyInternalData ( MPxNode *  node  )  [virtual]

This function copies the internal data of the transform node.

Parameters:
[in] node the node that is being duplicated

Reimplemented from MPxNode.

MVector MPxTransform::applyTranslationLimits ( const MVector &  unlimitedT,
MDataBlock &  block,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method returns a copy of the passed translation value with its members limited by any enabled translation limits on this node.

Parameters:
[in] unlimitedT The value before limits are applied.
[in] block The datablock to use.
[out] ReturnStatus Return status.
Returns:
The limited translation value.
Status Codes:

MVector MPxTransform::applyTranslationLocks ( const MVector &  toTest,
const MVector &  savedT,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to translation. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedT argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedT The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The value after the locking checks are applied.
Status Codes:

MEulerRotation MPxTransform::applyRotationLimits ( const MEulerRotation &  unlimitedR,
MDataBlock &  block,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method returns a copy of the passed rotation value with its members limited by any enabled rotation limits on this node.

Parameters:
[in] unlimitedR The value before applying the limits.
[in] block The datablock.
[out] ReturnStatus Return status.
Returns:
A MEulerRotation with limits applied to it.
Status Codes:

MEulerRotation MPxTransform::applyRotationLocks ( const MEulerRotation &  toTest,
const MEulerRotation &  savedR,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to rotation. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedR argument should be returned to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedR The values to revert to if the plug cannot be changed.
[in] ReturnStatus status
Returns:
The value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyScaleLimits ( const MVector &  unlimitedS,
MDataBlock &  block,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method returns a copy of the passed scale value with its members limited by any enabled scale limits on this node.

Parameters:
[in] unlimitedS The scale before applying limits.
[in] block The datablock.
[out] ReturnStatus Return status.
Returns:
The scale value with limits applied.
Status Codes:

MVector MPxTransform::applyScaleLocks ( const MVector &  toTest,
const MVector &  savedS,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to scale. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedS argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedS The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The scale value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyShearLocks ( const MVector &  toTest,
const MVector &  savedS,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to shear. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedS argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedS The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The shear value after the locking checks are applied.
Status Codes:

MEulerRotation MPxTransform::applyRotateOrientationLocks ( const MEulerRotation &  toTest,
const MEulerRotation &  savedRO,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to rotation orientation. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedRO argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedRO The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The rotate orientation value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyScaleLocksPivot ( const MPoint &  toTest,
const MPoint &  savedSP,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to scale pivot. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedSP argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedSP The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The scale pivot value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyRotatePivotLocks ( const MPoint &  toTest,
const MPoint &  savedRP,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to rotation pivots. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedRP argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedRP The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyScaleLocksPivotTranslate ( const MVector &  toTest,
const MVector &  savedSPT,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to the scalePivotTranslate attribute. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedR argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedSPT The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The value after the locking checks are applied.
Status Codes:

MVector MPxTransform::applyRotatePivotLocksTranslate ( const MVector &  toTest,
const MVector &  savedRPT,
MStatus *  ReturnStatus = NULL 
) [protected, virtual]

This method allows the custom transform to apply its own locking mechanism to the rotatePivotTranslate attribute. Standard dependency graph attribute locking happens automatically and cannot be modified by custom nodes.

If the plug should not be changed, then the value from the passed savedR argument should be return to be used in the transformation matrix.

Parameters:
[in] toTest The values to use if the plug is not locked.
[in] savedRPT The values to revert to if the plug cannot be changed.
[out] ReturnStatus status
Returns:
The value after the locking checks are applied.
Status Codes:

MStatus MPxTransform::dirtyMatrix (  )  [protected]

USE _dirtyMatrix() IN SCRIPT.

This marks the entire matrix dirty. When a value is changed and that value should also update the matrix, use this method, or one of the specific dirty methods (i.e. dirtyTranslation())

Returns:
Status Code.
Status Codes:

MStatus MPxTransform::dirtyTranslation ( const MVector &  savedT  )  [protected]

USE _dirtyTranslation() IN SCRIPT.

If the current transformation matrix translation values are different than the passed translation value, then the translation portion of the matrix will be marked dirty.

Parameters:
[in] savedT The previous translation values.
Returns:
Status Code.
Status Codes:

MStatus MPxTransform::dirtyRotation ( const MEulerRotation &  savedR  )  [protected]

USE _dirtyRotation() IN SCRIPT.

If the current transformation matrix rotation values are different than the passed rotation value, then the rotation portion of the matrix will be marked dirty.

Parameters:
[in] savedR The previous rotation values.
Returns:
Status code.
Status Codes:

MStatus MPxTransform::dirtyScale ( const MVector &  savedS  )  [protected]

USE _dirtyScale() IN SCRIPT.

If the current transformation matrix scale values are different than the passed scale value, then the scale portion of the matrix will be marked dirty.

Parameters:
[in] savedS The previous scale values.
Returns:
Status
Status Codes:

MStatus MPxTransform::dirtyShear ( const MVector &  savedSh  )  [protected]

USE _dirtyShear() IN SCRIPT.

If the current transformation matrix shear values are different than the passed shear value, then the shear portion of the matrix will be marked dirty.

Parameters:
[in] savedSh The previous shear values.
Returns:
status
Status Codes:

MStatus MPxTransform::dirtyRotateOrientation ( const MEulerRotation &  savedRO  )  [protected]

USE _dirtyRotateOrientation() IN SCRIPT.

If the current transformation matrix rotate orientation values are different than the passed rotate orientation value, then the rotate orientation portion of the matrix will be marked dirty.

Parameters:
[in] savedRO The previous rotate orientation values.
Returns:
Status
Status Codes:

MStatus MPxTransform::dirtyScalePivot ( const MPoint &  savedSP  )  [protected]

USE _dirtyScalePivot() IN SCRIPT.

If the current transformation matrix scale pivot values are different than the passed scale pivot value, then the scale pivot portion of the matrix will be marked dirty.

Parameters:
[in] savedSP The previous scale pivot values.
Returns:
Status
Status Codes:

MStatus MPxTransform::dirtyRotatePivot ( const MPoint &  savedRP  )  [protected]

USE _dirtyRotatePivot() IN SCRIPT.

If the current transformation matrix rotate pivot values are different than the passed rotate pivot value, then the rotate pivot portion of the matrix will be marked dirty.

Parameters:
[in] savedRP The previous rotate pivot values.
Returns:
Status
Status Codes:

MStatus MPxTransform::dirtyScalePivotTranslation ( const MVector &  savedST  )  [protected]

USE _dirtyScalePivotTranslation() IN SCRIPT.

If the current transformation matrix scale pivot translation values are different than the passed scale pivot translation value, then the scale pivot translation portion of the matrix will be marked dirty.

Parameters:
[in] savedST The previous scale pivot translation values.
Returns:
Status
Status Codes:

MStatus MPxTransform::dirtyRotatePivotTranslation ( const MVector &  savedRT  )  [protected]

USE _dirtyRotatePivotTranslation() IN SCRIPT.

If the current transformation matrix rotate pivot translation values are different than the passed rotate pivot translation value, then the rotate pivot translation portion of the matrix will be marked dirty.

Parameters:
[in] savedRT The previous rotate pivot translation values.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetTranslation ( MDataBlock &  block,
const MPlug &  plug,
const MVector &  newT,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method is used to modify and set the new translate values being passed in from the compute method or from the validateAndSetValue. The data block should be set with the corrected values. Corrections would come from enforcing any active limits as well as verifying that the plug's value may be changed. If the plug is locked or if it is the destination in a connection that disallows value changes, then the plug will be set to its unchanged value.

Parameters:
[in] block The data block to set.
[in] plug The translate plug (or one of its child plugs).
[in] newT The new translate value.
[in] space The space used for the new translation value.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetRotation ( MDataBlock &  block,
const MPlug &  plug,
const MEulerRotation &  newR,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method verifies that the passed value can be set on the rotate plugs. In the base class, limits as well as locking are checked by this method.

The compute, validateAndSetValue, and rotateTo functions all use this method.

Parameters:
[in] block The data block
[in] plug The plug. This should be rotate or one of its children.
[in] newR The new rotate value.
[in] space The space that the newR value is using.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetScale ( MDataBlock &  block,
const MPlug &  plug,
const MVector &  newS,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method verifies that the passed value can be set on the scale plugs. In the base class, limits as well as locking are checked by this method.

The compute, validateAndSetValue, and scaleTo functions all use this method.

Parameters:
[in] block The data block
[in] plug The plug. This should be scale or one of its children.
[in] newS The new scale value.
[in] space The space that the newS value is using.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetShear ( MDataBlock &  block,
const MPlug &  plug,
const MVector &  newS,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method verifies that the passed value can be set on the shear plugs. In the base class, only the locking conditions are enforced.

The compute, validateAndSetValue, and shearTo functions all use this method. If limits are desired on shear, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be shear or one of its children.
[in] newS The new shear value.
[in] space The space that the newS value is using.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetRotateOrientation ( MDataBlock &  block,
const MPlug &  plug,
const MEulerRotation &  newRO,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true 
) [protected, virtual]

This method verifies that the passed value can be set on the rotateAxis plugs. In the base class, only the locking conditions are enforced. This method will also update the rotation value if balance is true.

The compute, validateAndSetValue, and setRotateOrientation functions all use this method. If limits are desired on rotateAxis, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be rotateAxis or one of its children.
[in] newRO The new rotate orientation value.
[in] space The space that the newRO value is using.
[in] balance If balance is true, then the rotation is modified to compensate for the change in rotateAxis such that the transform remains unchanged.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetRotatePivot ( MDataBlock &  block,
const MPlug &  plug,
const MPoint &  newRP,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true 
) [protected, virtual]

This method verifies that the passed value can be set on the rotatePivot plugs. In the base class, only the locking conditions are enforced. This method will also update the rotatePivotTranslate value if balance is true.

The compute, validateAndSetValue, and setRotatePivot functions all use this method. If limits are desired on rotatePivot, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be rotatePivot or one of its children.
[in] newRP The new rotate pivot value.
[in] space The space that the newRP value is using.
[in] balance If balance is true, then the rotatePivotTranslate is modified to compensate for the change in rotatePivot such that the transform remains unchanged.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetRotatePivotTranslation ( MDataBlock &  block,
const MPlug &  plug,
const MVector &  newPT,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method verifies that the passed value can be set on the rotatePivotTranslate plugs. In the base class, only the locking conditions are enforced.

The compute, validateAndSetValue, and setRotatePivotTranslation functions all use this method. If limits are desired on rotatePivotTranslate, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be rotatePivotTranslate or one of its children.
[in] newPT The new rotate pivot translate value.
[in] space The space that the newPT value is using.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetScalePivot ( MDataBlock &  block,
const MPlug &  plug,
const MPoint &  newSP,
MSpace::Space  space = MSpace::kTransform,
bool  balance = true 
) [protected, virtual]

This method verifies that the passed value can be set on the scalePivot plugs. In the base class, only the locking conditions are enforced. This method will also update the scalePivotTranslate value if balance is true.

The compute, validateAndSetValue, and setScalePivot functions all use this method. If limits are desired on scalePivot, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be scalePivot or one of its children.
[in] newSP The new scale pivot value.
[in] space The space that the newSP value is using.
[in] balance If balance is true, then the scalePivotTranslate is modified to compensate for the change in scalePivot such that the transform remains unchanged.
Returns:
Status
Status Codes:

MStatus MPxTransform::checkAndSetScalePivotTranslation ( MDataBlock &  block,
const MPlug &  plug,
const MVector &  newPT,
MSpace::Space  space = MSpace::kTransform 
) [protected, virtual]

This method verifies that the passed value can be set on the scalePivotTranslate plugs. In the base class, only the locking conditions are enforced.

The compute, validateAndSetValue, and setScalePivotTranslation functions all use this method. If limits are desired on scalePivotTranslate, then the limit enforcement should be implemented in this method in a derived class.

Parameters:
[in] block The data block
[in] plug The plug. This should be scalePivotTranslate or one of its children.
[in] newPT The new scale pivot translate value.
[in] space The space that the newPT value is using.
Returns:
Status
Status Codes:

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