MFnData Class Reference
[FunctionSet classesOpenMaya - API module for common classes]

#include <MFnData.h>
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List of all members.


Detailed Description

Parent class for dependency graph data function sets.

MFnData is the parent class for all dependency graph data function sets. Conceptually, data objects are what flow through the connections in the dependency graph.

Each node in the dependency graph has a data block associated with it. The data block holds the data objects for all of the node's attributes (see MDataBlock). The data block is only available during the compute method of a node. A data handle (MDataHandle) can be created to access a particular attribute's data inside of the data block.

Once a data handle is obtained, it is possible to get the data object from it. This is only necessary for heavier data structures such as geometry or strings. Simple numeric data can be manipulated straight through the data handle.

Note: using kDynSweptGeometry data requires that a plug-in or stand alone API application be linked with the OpenMayaFX library.


Public Types

enum   Type {
   kInvalid, kNumeric, kPlugin, kPluginGeometry,
   kString, kMatrix, kStringArray, kDoubleArray,
   kIntArray, kPointArray, kVectorArray, kComponentList,
   kMesh, kLattice, kNurbsCurve, kNurbsSurface,
   kSphere, kDynArrayAttrs, kDynSweptGeometry, kSubdSurface,
   kNObject, kNId, kLast
}
  Types of dependency graph data. More...

Public Member Functions

virtual MFn::Type  type () const
  Function set type.
virtual  ~MFnData ()
  Destructor.
  MFnData (MObject &object, MStatus *ReturnStatus=NULL)
  Constructor.
  MFnData ()
  MFnData (const MObject &object, MStatus *ReturnStatus=NULL)
  Constructor.

Protected Member Functions

virtual const char *  className () const
  Class name.

Member Enumeration Documentation

Types of dependency graph data.

Enumerator:
kInvalid  Invalid value.
kNumeric  Numeric, use MFnNumericData extract the node data.
kPlugin  Plugin Blind Data, use MFnPluginData to extract the node data.
kPluginGeometry  Plugin Geometry, use MFnGeometryData to extract the node data.
kString  String, use MFnStringData to extract the node data.
kMatrix  Matrix, use MFnMatrixData to extract the node data.
kStringArray  String Array, use MFnStringArrayData to extract the node data.
kDoubleArray  Double Array, use MFnDoubleArrayData to extract the node data.
kIntArray  Int Array, use MFnIntArrayData to extract the node data.
kPointArray  Point Array, use MFnPointArrayData to extract the node data.
kVectorArray  Vector Array, use MFnVectorArrayData to extract the node data.
kComponentList  Component List, use MFnComponentListData to extract the node data.
kMesh  Mesh, use MFnMeshData to extract the node data.
kLattice  Lattice, use MFnLatticeData to extract the node data.
kNurbsCurve  Nurbs Curve, use MFnNurbsCurveData to extract the node data.
kNurbsSurface  Nurbs Surface, use MFnNurbsSurfaceData to extract the node data.
kSphere  Sphere, use MFnSphereData to extract the node data.
kDynArrayAttrs  ArrayAttrs, use MFnArrayAttrsData to extract the node data.
kDynSweptGeometry  SweptGeometry, use MFnDynSweptGeometryData to extract the node data. This data node is in OpenMayaFX which must be linked to.
kSubdSurface  Subdivision Surface, use MFnSubdData to extract the node data.
kNObject  nObject data, use MFnNObjectData to extract node data
kNId  nId data, use MFnNIdData to extract node data
kLast  Last value. It does not represent real data, but can be used to loop on all possible types

Reimplemented in MFnArrayAttrsData, and MFnNumericData.


Constructor & Destructor Documentation

MFnData::MFnData ( 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:

MFnData::MFnData (  ) 

Default class constructor

MFnData::MFnData ( 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:

Member Function Documentation

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

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

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