MAnimCurveChange Class Reference
[OpenMayaAnim - API module for animation]

#include <MAnimCurveChange.h>

List of all members.

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Detailed Description

Anim Curve Change Cache.

Adding, removing and changing keyframes on an anim curve cannot be done simply by setting attribute values on the corresponding node. This makes it impossible to capture such changes in an MDGModifier for undo/redo purposes.

The MAnimCurveChange class provides persistent storage for information concerning changes to anim curve nodes, along with methods to undo and redo those changes. MFnAnimCurve methods which add, remove or change keyframes take an optional MAnimCurveChange instance in which to store information about the changes being made.

If the same MAnimCurveChange instance is used for multiple anim curve edit operations, then the cache maintains an undo/redo queue which allows all changes in the series to be undone or redone. If selective undo/redo is required, then a different MAnimCurveCache instance must be used for each edit.

Public Member Functions
	MAnimCurveChange (MStatus *ReturnStatus=NULL)
	~MAnimCurveChange ()
MStatus	undoIt ()
MStatus	redoIt ()

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Constructor & Destructor Documentation

MAnimCurveChange::MAnimCurveChange

(

MStatus *

ReturnStatus = NULL

)

Class Constructor

Creates a Anim Curve Change cache.

Parameters:

[out]

ReturnStatus

Status Code (see below)

Status Codes:

• MS::kSuccess Success
• MS::kInsufficientMemory Insufficient memory to create Anim Curve Change cache

MAnimCurveChange::~MAnimCurveChange

(

)

Class Destructor

No additional action.

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Member Function Documentation

MStatus MAnimCurveChange::undoIt

(

)

Undoes all of the Anim Curve edits that have been given to this cache.

Returns:

Status Code (see below)

Status Codes:

• MS::kSuccess Success
• MS::kFailure Failure undoing edits - cache nonexistent or inaccessible

MStatus MAnimCurveChange::redoIt

(

)

Redoes all of the Anim Curve edits that this cache previously undid. It is only valid to invoke this method after an undo on this cache.

Returns:

Status Code (see below)

Status Codes:

• MS::kSuccess Success
• MS::kFailure Failure redoing edits - cache nonexistent or inaccessible