#include <MFnSubd.h>

Class Description

Subdivision surface function set.

This function set provides access to subdivision surfaces. Objects of type MFn::kSubdiv, MFn::kSubdivData, and MFn::kSubdivGeom are supported. MFn::kSubdiv objects are shapes in the DAG, MFn::kSubdivGeom objects are the raw geometry that the shapes use, and MFn::kSubdivData objects are the data that is passed through dependency graph connections.

Maya implements fully hierarchical Catmull-Clark quad based subdivision surfaces. You can use them without any hierarchical edits, but their full power is only realized when you do use the hierarchy. Using the hierarchy lets you access additional vertices on the existing faces. For example, a single 4 vertex plane can give you access, through hierarchy, to over 16,000,000 points at the finest level of the hierarchy (please don't try it). Additionally, the points at the finer levels are created only as you need them and only in the areas where you need them, giving you an implied level of detail workflow.

The "base" mesh is sometimes used to describe the coarsest level of the hierarchy. Once we go one level finer (to level "1") all faces are four sided (though not all vertices are of valence 4). At that point, each face can be considered to have 4 "children" faces. Starting with a 4 vertex single face plane, there will be 4 faces (and 9 vertices) at level 1, 16 faces (and 25 vertices) at level 2, etc. You can go as deep as level 12.

Please consult Maya documentation on subdivision surfaces for more details.

Subdivision Surface Construction Subdivision surfaces are created by specifying a base polygonal mesh, hierarchical edits (optional) and creases (optional).

The base mesh contains a vertex list, a list of vertex counts per-polygon, and a list of vertices that make up the polygons. If you are familiar with the creation of polygonal meshes, this is exactly equivalent to that setup. With a small set of limitations, any polygonal object can be converted into a subdivision surface. The current limitations are:

non manifold geometry The polygons must be manifold; i.e., an edge has at most two incident faces.

vertex valence A vertex must have valence of at least 3, unless it's a boundary vertex in which case it needs the valence of at least 2.

polygon vertex count Maximal vertex count in a single polygon is 256.

total vertex count Maximal vertex count in a base mesh is ~8,000,000 (2^23).

The easiest way to create a subdivision surface is probably to use polyToSubdiv MEL command to create it from a polygon. Alternativelly, the same functionality is available through the API using createFromPolygon method.

Alternatively, you can create a subdivision surface either by converting an existing NURBS surface with createFromNurbsSurface or directly, by specifying vertex lists, vertex connections lists, etc. The last method will look familiar to those that have used MFnMesh::create method to create a polygon.

The following lists are used by the create method to construct a subdivision surface:

vertex list All of the vertices for the subdivision surface are stored in a master vertex list which is an array indexed from 0 to numVertices()-1. Vertices in this list can be shared among polygons.

polygon count list This is a list containing the number of vertices for each polygon. Each polygon in the mesh would have an entry in this list containing its number of vertices.

vertex connection list This is a list of the vertex id's for each polygon. Since polygons can have different numbers of vertices, the polygon count list is used to determine which polygons are represented by the various sections of this list.

Texture Coordinates (UV's) You can optionally specify texture (uv) coordinates. UV coordinates are 2-d coordinates used for mapping textures to the polygons of a surface. Each polygon contains as many UV's as it has vertices. The UV values are not shared and you can think of them as "owned" by a polygon, rather than each vertex in that polygon.

Subdivision Surface Component API Names

In order to successfully use the subdivision surface API, you need to familiarize yourself with the naming convention used for its components within the API.

In the polygon case, we simply number the vertices 0, 1, ... N-1. The faces and the edges and the faces are numbered similarly.

For the subdivision surfaces, this is not the case, mostly because of the hierarchical approach we took. Since it would be prohibitive to instantiate all the faces all the time (think of those 16M that can from just one original face) the names have to be order of creation independent.

The simplest way to think about each API name is "start with a face and follow a path into the finer levels of the hierarchy recording each turn along the way".

Here's some details. You should also consult MFnSubdNames class which contains a number of helpful methods for interpreting, creating and modifying the component API names. While this will take some getting used to, the good news is that instantiating more vertices does not change the names of the existing ones (unless you're adding more level 0 vertices) so any vertex animation, etc. will not be affected by a need to model more detail into another part of the surface.

base face name Each component API name is "rooted" at one of the faces in the original, coarsest (level 0, "base") mesh. These faces are numbered 0, 1, etc.

level Each component exists only at a single level. The value ranges from 0 to 12.

level 1 choice Coarsest faces can have up to 256 sides. Finer faces are always four sided. This portion of the name lets us decide which of the possibly 256 level 1 faces we are choosing.

path from level 1 Once we are at a level 1 face, we go down to a finer face by choosing one of the four children. This is recorded as two bits per level, giving us a "path" down to the desired level.

vertex/edge choice For all but level 0 faces, once we know the face, we just have to choose one of the four edges or vertices. This value is usually 0 for the faces (it is ignored). In the case of the level 0 faces, this contains the full index of the vertex within that face

storage Subdivision surface components (vertex, faces, names) are stored as single unsigned 64 bit integers (MUint64 type is defined in MTypes.h). The above 5 values are compressed into the 64 bit int storage. For those that want the gory details, the following is the way the components are currently organized within the 64 bits of data. However you should use the 5 values above and not this 64 bit value as the way these 5 values are packed into the 64 bit value may change in future. The contents of the 64 bits are presented here from the highest value bit down to the lowest:

{1} - unused
{23} - base face name
{8} - level 1 choice
{2} - unused
{4} - level
{24} - path
{2} - unused

For the subdivision surfaces, the most important names are those of the faces. Given a face name, each vertex on that face is named based on that face. That does mean that each vertex will typically have more than one name. Maya will always give you a unique name by choosing the one that is numerically the smallest (in the 64 bit sense).

Examples:: gpuCache/gpuCacheCmd.cpp, and pointOnSubdNode/pointOnSubdNode.cpp.

Inheritance diagram for MFnSubd:

Public Member Functions
virtual MFn::Type	type () const
	Function set type. More...

virtual	~MFnSubd ()
	Destructor. More...

	MFnSubd ()
	Default constructor.

	MFnSubd (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...

	MFnSubd (const MDagPath &object, MStatus *ret=NULL)
	Constructor. More...

MObject	createBaseMesh (bool reverseNormal, int numVertices, int numPolygons, const MPointArray &vertexArray, const MIntArray &polygonCounts, const MIntArray &polygonConnects, MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new subdivision surface given an array of vertices and connection information and sets this function set to operate on the new surface. More...

MObject	copy (const MObject &source, MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	This method creates a copy of a given source subdivision surface. More...

MObject	collapse (const int level, bool makeNewNodeInvisible, MStatus *ReturnStatus=NULL)
	This method creates a copy of a given source subdivision surface collapsed by the given number of levels. More...

int	vertexBaseMeshAdd (double x, double y, double z, MStatus *ReturnStatus=NULL)
	Add a vertex to the base mesh and return its "index" name. More...

MUint64	polygonBaseMeshAdd (int vertexCount, const int vertexIds[], MStatus *ReturnStatus=NULL)
	Add a polygon at the base mesh level. More...

MUint64	polygonBaseMeshAddWithUVs (int vertexCount, const int vertexIds[], const double uValues[], const double vValues[], MStatus *ReturnStatus=NULL)
	Add a polygon at the base mesh level. More...

int	editsPending (MStatus *ReturnStatus=NULL) const
	As the new hierarchical vertex offsets are being introduced, you can choose to not apply them to the surface immediatelly. More...

void	editsUpdateAll (MStatus *ReturnStatus=NULL)
	If there are pending edits, this function will update the surface so that there are no pending edits. More...

unsigned int	levelMaxCurrent (MStatus *ReturnStatus=NULL) const
	Returns the finest level that currently exist. More...

unsigned int	levelMaxAllowed (MStatus *ReturnStatus=NULL) const
	Returns the maximum level that can be created. More...

void	levelFullySubdivideTo (int level, MStatus *ReturnStatus=NULL)
	Fully subdivide the whole surface to the specified level. More...

unsigned int	vertexCount (int level=0, MStatus *ReturnStatus=NULL) const
	Returns the finest vertex count at a particular level. More...

MUint64	vertexIdFromBaseVertexIndex (int baseVertexIndex, MStatus *ReturnStatus=NULL) const
	Vertices are named using 64-bit integers. More...

int	vertexBaseIndexFromVertexId (MUint64 vertexId, MStatus *ReturnStatus=NULL) const
	Given a 64-bit id of the vertex, return its index (0, 1, ...) if it happens to be a base mesh vertex. More...

MStatus	vertexEditsGetAllNonBase (MUint64Array &vertexIds, MVectorArray &edits, MSpace::Space space=MSpace::kObject) const
	Returns all the vertices below the base mesh that have been modified from their original position (the original position is specified by the position of the base mesh vertices). More...

MStatus	vertexEditsSetAllNonBase (const MUint64Array &vertexIds, const MVectorArray &edits, MSpace::Space space=MSpace::kObject)
	Given an array of vertex names and the offsets from their original positions, set the new vertex positions. More...

MStatus	vertexEditsClearAllNonBase ()
	Find all vertices with edits and remove those edits, setting them back to their original position. More...

MStatus	vertexPositionGet (MUint64 vertId, MPoint &position, MSpace::Space space=MSpace::kObject) const
	Get the position of the vertex with a given name. More...

MStatus	vertexEditGet (MUint64 vertId, MVector &edit, MSpace::Space space=MSpace::kObject) const
	Get the offset of the specified vertex from its original position. More...

MStatus	vertexPositionGetNoEdit (MUint64 vertId, MPoint &position, MSpace::Space space=MSpace::kObject) const
	What would the position of this vertex be if there were no edits; i.e., what was its original position. More...

MStatus	vertexPositionSet (MUint64 vertId, const MPoint &position, bool updateEdits, MSpace::Space space=MSpace::kObject)
	Set the position of the vertex with a given name. More...

MStatus	vertexEditSet (MUint64 vertId, const MVector &edit, bool updateEdits, MSpace::Space space=MSpace::kObject)
	Set the original position offset for the given vertex. More...

MStatus	vertexBaseMeshGet (MPointArray &positions, MSpace::Space space=MSpace::kObject) const
	Return all base mesh vertices in the array using their indices (not the 64-bit names). More...

MStatus	vertexBaseMeshSet (const MPointArray &positions, MSpace::Space space=MSpace::kObject)
	Set the positions for the base mesh vertices using the 0, 1,... More...

MStatus	vertexBaseMeshGetWithId (MPointArray &positions, MUint64Array &vertexIds, MSpace::Space space=MSpace::kObject) const
	Return all base mesh vertices in the array using their indices but also provide the 64-bit names. More...

MStatus	vertexBaseMeshSetWithId (const MPointArray &positions, const MUint64Array &vertexIds, MSpace::Space space=MSpace::kObject)
	Set the positions for the base mesh vertices using the 64-bit names. More...

int	vertexValence (MUint64 vertId, MStatus *ReturnStatus=NULL) const
	Returns the valence (number of incident edges) of the given vertex. More...

MStatus	vertexNormal (MUint64 vertId, MVector &normal) const
	Returns the normal at the vertex. More...

MStatus	vertexAdjacentVertices (MUint64 vertId, MUint64Array &vertList) const
	Return the list of adjacent vertices as their 64-bit ids. More...

MStatus	vertexIncidentEdges (MUint64 vertId, MUint64Array &edgeList) const
	Return the list of incident edges as their 64-bit ids. More...

MStatus	vertexIncidentPolygons (MUint64 vertId, MUint64Array &polyList) const
	Return the list of incident polygons as their 64-bit ids. More...

bool	vertexIsBoundary (MUint64 vertId, MStatus *ReturnStatus=NULL) const
	Return true if the vertex is a boundary vertex. More...

bool	vertexIsValid (MUint64 vertId, MStatus *ReturnStatus=NULL) const
	Return true if the vertex is a valid vertex. More...

bool	vertexIsCreased (MUint64 vertId, MStatus *ReturnStatus=NULL) const
	Return true if the vertex is creased. More...

bool	vertexCreaseRelevant (MUint64 vertId, MStatus *ReturnStatus=NULL) const
	Return true if the crease of the vertex is a relevant piece of information. More...

MStatus	vertexSetCrease (MUint64 vertId, bool creased) const
	Set the particular vertex' crease state. More...

MStatus	vertexChildren (MUint64 vertId, MUint64Array &children) const
	Returns the "children" of the particular vertex if they exist. More...

MStatus	creasesGetAll (MUint64Array &vertexIds, MUint64Array &edgeIds) const
	Returns all creases on the subdivision surface in two arrays of 64-bit ids; one for the vertices, one for edges. More...

MStatus	creasesSetAll (const MUint64Array &vertexIds, const MUint64Array &edgeIds)
	Set the creases on all vertices and edges with a given 64-bit name. More...

MStatus	creasesClearAll () const
	Clear all crease information from this surface. More...

MStatus	updateAllEditsAndCreases ()
	If you have been editing offsets without updating the surface, this function will save you. More...

unsigned int	edgeCount (int level=0, MStatus *ReturnStatus=NULL) const
	Returns the number of edges at a level. More...

MUint64	edgeBetween (MUint64 vertex1, MUint64 vertex2, MStatus *ReturnStatus=NULL) const
	Return the name of the edge that connects the two vertices. More...

MStatus	edgeVertices (MUint64 edge, MUint64 &v1, MUint64 &v2) const
	Given an edge, return the two vertices at its ends. More...

MStatus	edgeAdjacentPolygon (MUint64 edge, MUint64Array &polys) const
	Return the polygons adjacent to this edge. More...

bool	edgeIsBoundary (MUint64 edge, MStatus *ReturnStatus=NULL) const
	Test if the edge specified is a boundary edge or not. More...

bool	edgeIsValid (MUint64 edgeId, MStatus *ReturnStatus=NULL) const
	Returns true if the specified edge name is valid. More...

bool	edgeIsCreased (MUint64 edgeId, MStatus *ReturnStatus=NULL) const
	Return true if the edge is creased. More...

bool	edgeCreaseRelevant (MUint64 edgeId, MStatus *ReturnStatus=NULL) const
	Return true if the crease of the edge is a relevant piece of information. More...

MStatus	edgeSetCrease (MUint64 edgeId, bool creased) const
	Set the particular edge's crease state. More...

MStatus	edgeChildren (MUint64 edgeId, MUint64Array &children) const
	Returns the "children" of the particular edge. More...

unsigned int	polygonCount (int level=0, MStatus *ReturnStatus=NULL) const
	Returns the number of polygons currently existing at the specified level of the hierarchy. More...

int	polygonCountMaxWithGivenBaseMesh (int level=1, MStatus *ReturnStatus=NULL) const
	If you were to fully subdivide at a given level, how many polygons would you have at that level? This function will tell you and possibly save you from running out of memory if you go too deep. More...

unsigned int	polygonVertexCount (MUint64 polyId, MStatus *ReturnStatus=NULL) const
	How many vertices on a given polygon? The vertices are at the same level as the polygon. More...

MStatus	polygonVertices (MUint64 polyId, MUint64Array &vertIds) const
	Given the polygon, return its vertices. More...

unsigned int	polygonEdgeCount (MUint64 polyId, MStatus *ReturnStatus=NULL) const
	The number of edges on the given polygon. More...

MStatus	polygonEdges (MUint64 polyId, MUint64Array &edgeIds) const
	Given the polygon, return its edges. More...

bool	polygonIsValid (MUint64 polyId, MStatus *ReturnStatus=NULL) const
	Return true if the polygon is a valid polygon. More...

bool	polygonHasChildren (MUint64 polyId, MStatus *ReturnStatus=NULL) const
	Returns whether or not the given polygon has children. More...

MStatus	polygonChildren (MUint64 polyId, MUint64Array &children) const
	Returns the list of children polygons on the given polygon. More...

MStatus	polygonSubdivide (MUint64 polyId)
	Subdivide the given polygon into 4 children (if this happens to be the level 0 polygon you will get as many children as that polygon has edges). More...

MStatus	polygonSetUseUVs (MUint64 polyId, bool useThem)
	If this is set, the polygon will use the user specified UVs. More...

bool	polygonHasVertexUVs (MUint64 polyId, MStatus *ReturnStatus=NULL)
	Returns true if there are user specified UVs on this polygon. More...

MStatus	polygonGetVertexUVs (MUint64 polyId, MDoubleArray &uValues, MDoubleArray &vValues) const
	Get the vertex UVs from the polygon. More...

MStatus	polygonSetVertexUVs (MUint64 polyId, const MDoubleArray &uValues, const MDoubleArray &vValues)
	Set the UV values on the polygon. More...

MStatus	polygonGetCenterUV (MUint64 polyId, double &u, double &v) const
	Return the UV values in the "center" of this polygon. More...

MStatus	evaluatePosition (MUint64 polyId, double u, double v, bool uvNormalized, MPoint &) const
	Evaluate the surface position at the given parameter point on the polygon. More...

MStatus	evaluateNormal (MUint64 polyId, double u, double v, bool uvNormalized, MVector &nrml) const
	Evaluate the surface normal at the given parameter point on the polygon. More...

MStatus	evaluatePositionAndNormal (MUint64 polyId, double u, double v, bool uvNormalized, MPoint &pos, MVector &nrml) const
	Evaluate the surface position and normal at the given parameter point on the polygon. More...

bool	getCubicSpline (MUint64 polyId, MPointArray vertices, MStatus *ReturnStatus=NULL)
	Some of the faces (usually at level 2 or below) happen to be exactly the same as uniform bi-cubic B-splines. More...

MStatus	getConnectedShaders (unsigned int instanceNumber, MObjectArray &shaders, MUint64Array &faces, MIntArray &indices) const
	Returns all the shaders (sets) connected to the specified instance of this subdivision surface and two arrays indicating face/shader assignments. More...

MObject	tesselate (bool uniform, int depth, int sample, MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Performs tesselation on this surface and create a new mesh in the DAG. More...

MObject	tessellateViaNurbs (MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Performs tesselation on this surface and create a new mesh in the DAG. More...

MStatus	convertToNurbs (MObjectArray &newNurbsSurfaces)
	Converts this surface to a set of nurbs surfaces. More...

MStatus	updateSubdSurface ()
	Signal that this subdivision surface has changed and needs to redraw itself. More...

MStatus	vertexBaseMeshAddWithIndex (double x, double y, double z, int index)
	Very similar to vertexBaseMeshAdd, this gives you an advanced option of specifying the index for the new vertex to be created. More...

	MFnSubd (const MObject &object, MStatus *ret=NULL)
	Constructor. More...

bool	getCubicSpline (MUint64 polyId, MPoint vertices[16], MStatus *ReturnStatus=NULL)
	NO SCRIPT SUPPORT. More...

Public Member Functions inherited from MFnDagNode
virtual	~MFnDagNode ()
	Destructor. More...

	MFnDagNode ()
	Class Constructor. More...

	MFnDagNode (MObject &object, MStatus *ret=NULL)
	This method is not available in Python. More...

	MFnDagNode (const MDagPath &object, MStatus *ret=NULL)
	Class Constructor. More...

MObject	create (const MTypeId &typeId, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MTypeId &typeId, const MString &name, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MString &type, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MString &type, const MString &name, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

unsigned int	parentCount (MStatus *ReturnStatus=NULL) const
	Determines the number of parent Nodes of the Node. More...

MObject	parent (unsigned int i, MStatus *ReturnStatus=NULL) const
	Queries the DAG Node attached to the Function Set for the parent Node corresponding to the given index. More...

MStatus	addChild (MObject &child, unsigned int index=kNextPos, bool keepExistingParents=false)
	Makes the given DAG Node a child of the DAG Node to which this instance of the Function Set is attached. More...

MStatus	removeChild (MObject &child)
	Removes the given DAG Node from the parent. More...

MStatus	removeChildAt (unsigned int index)
	Removes the child at the given index from the parent. More...

unsigned int	childCount (MStatus *ReturnStatus=NULL) const
	Determines the number of child Nodes of the Node. More...

MObject	child (unsigned int i, MStatus *ReturnStatus=NULL) const
	Queries the DAG Node attached to the Function Set for the child Node corresponding to the given index. More...

MObject	dagRoot (MStatus *ReturnStatus=NULL)
	Determines the root of the first DAG Path to the DAG Node attached to the Function Set. More...

bool	hasParent (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the given Node is a parent of the DAG Node attached to the Function Set. More...

bool	hasChild (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the given Node is a child of the DAG Node attached to the Function Set. More...

bool	isChildOf (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node attached to the Function Set is a child of the given node. More...

bool	isParentOf (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node attached to the Function Set is a parent of the given node. More...

bool	inUnderWorld (MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node is an underworld node. More...

bool	inModel (MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node is in the model. More...

bool	isInstanceable (MStatus *ReturnStatus=NULL) const
	Returns true if the DAG node can be instanced, and false otherwise. More...

MStatus	setInstanceable (const bool how)
	Sets whether or not the DAG node is instanceable. More...

bool	isInstanced (bool indirect=true, MStatus *ReturnStatus=NULL) const
	Determines whether the DAG Node attached to the Function Set is directly or indirectly instanced. More...

bool	isInstancedAttribute (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Returns true if the specified attribute is instanced. More...

unsigned int	instanceCount (bool total, MStatus *ReturnStatus=NULL) const
	Determines the number of times the Node attached to the Function Set is instanced. More...

MObject	duplicate (bool instance=false, bool instanceLeaf=false, MStatus *ReturnStatus=NULL) const
	This method duplicates the DAG hierarchy rooted at the current node. More...

MStatus	getPath (MDagPath &path) const
	Returns a DAG Path to the DAG Node attached to the Function Set. More...

MStatus	getAllPaths (MDagPathArray &paths) const
	Determines all DAG Paths to the DAG Node attached to the Function Set. More...

MString	fullPathName (MStatus *ReturnStatus=NULL) const
	Return a string representing the full path from the root of the dag to this object. More...

MString	partialPathName (MStatus *ReturnStatus=NULL) const
	Return a string representing the partial path from the root of the dag to this object. More...

MMatrix	transformationMatrix (MStatus *ReturnStatus=NULL) const
	Returns the object space transformation matrix for this DAG node. More...

bool	isIntermediateObject (MStatus *ReturnStatus=NULL) const
	Returns true if this object is an intermediate in a geometry calculation. More...

MStatus	setIntermediateObject (bool isIntermediate)
	Sets whether this object is an intermediate in a geometry calculation. More...

int	objectColor (MStatus *ReturnStatus=NULL) const
	This method is obsolete. More...

MStatus	setObjectColor (int color)
	Sets the index for the current user defined inactive color used by the node. More...

bool	usingObjectColor (MStatus *ReturnStatus=NULL) const

MStatus	setUseObjectColor (bool useObjectColor)

MObjectColorType	objectColorType (MStatus *ReturnStatus=NULL) const
	Determines whether or not the user defined inactive color will be used for the node, or whether the default inactive color will be used. More...

MStatus	setObjectColorType (MObjectColorType type)
	Sets whether or not the user defined inactive object color will be used. More...

MStatus	setObjectColor (const MColor &color)
	Sets the color value for the current user defined inactive color used by the node. More...

MColor	objectColorRGB (MStatus *ReturnStatus=NULL) const
	Determines the RGB color for the current user defined inactive color used by the node. More...

int	objectColorIndex (MStatus *ReturnStatus=NULL) const
	Determines the index for the current user defined inactive color used by the node. More...

MColor	hiliteColor (MStatus *ReturnStatus=NULL) const
	Determines the current hilite color used by the node. More...

bool	usingHiliteColor (MStatus *ReturnStatus=NULL) const
	Determines whether or not the hilite color will be used for the node. More...

MColor	dormantColor (MStatus *ReturnStatus=NULL) const
	Determines the dormant color used by this node. More...

MColor	activeColor (MStatus *ReturnStatus=NULL) const
	Determines the active color used by this node. More...

bool	drawOverrideEnabled (MStatus *ReturnStatus=NULL) const
	Determines whether or not draw override is turned on for this node. More...

bool	drawOverrideIsReference (MStatus *ReturnStatus=NULL) const
	Determines whether or not Display Type of the draw override is Reference for this node. More...

bool	drawOverrideIsTemplate (MStatus *ReturnStatus=NULL) const
	Determines whether or not Display Type of the draw override is Template for this node. More...

bool	drawOverrideColor (MColor &color, MStatus *ReturnStatus=NULL) const
	Determines the draw override color used by this node. More...

MStatus	getConnectedSetsAndMembers (unsigned int instanceNumber, MObjectArray &sets, MObjectArray &comps, bool renderableSetsOnly) const
	Returns all the sets connected to the specified instance of this DAG object. More...

MBoundingBox	boundingBox (MStatus *ReturnStatus=NULL) const
	Returns the bounding box for the dag node in object space. More...

MDagPath	dagPath (MStatus *ReturnStatus=NULL) const
	Returns the DagPath to which the Function Set is attached. More...

virtual MStatus	setObject (const MDagPath &path)
	Attaches Function Set to the DAG Node that has the given DAG Path. More...

virtual MStatus	setObject (MObject &object)
	Attaches Function Set to given DAG Node. More...

MObject	model (MStatus *ReturnStatus=NULL) const
	This method is obsolete. More...

	MFnDagNode (const MObject &object, MStatus *ret=NULL)
	No script support. More...

virtual MStatus	setObject (const MObject &object)
	No script support. More...

Public Member Functions inherited from MFnDependencyNode
virtual	~MFnDependencyNode ()
	Destructor.

	MFnDependencyNode ()
	Default constructor.

	MFnDependencyNode (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...

MObject	create (const MTypeId &typeId, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type tag. More...

MObject	create (const MTypeId &typeId, const MString &name, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type tag. More...

MObject	create (const MString &type, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type. More...

MObject	create (const MString &type, const MString &name, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type. More...

MTypeId	typeId (MStatus *ReturnStatus=NULL) const
	Returns the type id of this node. More...

MString	typeName (MStatus *ReturnStatus=NULL) const
	Returns the type name of this node. More...

MString	name (MStatus *ReturnStatus=NULL) const
	Returns the name of this node. More...

MString	absoluteName (MStatus *ReturnStatus=NULL) const
	Returns the absolute name of this node. More...

MString	pluginName (MStatus *ReturnStatus=NULL) const
	Returns the name of the plug-in this MFnDependendencyNode was defined in. More...

MString	setName (const MString &name, bool createNamespace=false, MStatus *ReturnStatus=NULL)
	Sets the name of this node. More...

MUuid	uuid (MStatus *ReturnStatus=NULL) const
	Returns the node's UUID. More...

void	setUuid (const MUuid &uuid, MStatus *ReturnStatus=NULL)
	Sets the node's UUID. More...

MStatus	getConnections (MPlugArray &array) const
	Get all of the current connections to this node as an array of plugs. More...

unsigned int	attributeCount (MStatus *ReturnStatus=NULL) const
	Returns the number of attributes that this node has. More...

MObject	attribute (unsigned int index, MStatus *ReturnStatus=NULL) const
	Finds the attribute of this node at the given index. More...

MObject	reorderedAttribute (unsigned int index, MStatus *ReturnStatus=NULL) const
	Some nodes, such as the various animCurve nodes, require that their attributes be set in a specific order for proper operation. More...

MObject	attribute (const MString &attrName, MStatus *ReturnStatus=NULL) const
	Finds the attribute of this node that has the given name. More...

MAttrClass	attributeClass (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Returns the class (normal, dynamic, extension) of the specified attribute. More...

MStatus	getAffectedAttributes (const MObject &attr, MObjectArray &affectedAttributes) const
	Returns an array of attributes that are affected by the attribute passed in. More...

MStatus	getAffectedByAttributes (const MObject &attr, MObjectArray &affectedByAttributes) const
	Returns an array of attributes that affect the attribute passed in, attr. More...

MPlug	findPlug (const MObject &attr, bool wantNetworkedPlug, MStatus *ReturnStatus=NULL) const
	Attempt to find a plug for the given attribute. More...

MPlug	findPlug (const MString &attrName, bool wantNetworkedPlug, MStatus *ReturnStatus=NULL) const
	Attempt to find a plug for the given attribute. More...

MPlug	findPlug (const MObject &attr, MStatus *ReturnStatus=NULL) const
	This method is obsolete. More...

MPlug	findPlug (const MString &attrName, MStatus *ReturnStatus=NULL) const
	This method is obsolete. More...

MStatus	addAttribute (const MObject &attr)
	Add a new dynamic attibute to this node. More...

MStatus	removeAttribute (const MObject &attr)
	Remove a dynamic attribute from a node. More...

MPxNode *	userNode (MStatus *ReturnStatus=NULL) const
	If the function set's node is a plug-in node, then this method will extract the MPxNode pointer from it. More...

bool	isFromReferencedFile (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node came from a referenced file. More...

bool	isShared (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node is shared. More...

bool	isTrackingEdits (MStatus *ReturnStatus=NULL) const
	Returns whether or not edits on the given node are being tracked by the generalized edit system. More...

bool	hasUniqueName (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node's name is unique within the scene. More...

MString	parentNamespace (MStatus *ReturnStatus=NULL) const
	Returns the name of the namespace in which this node resides. More...

bool	isLocked (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node is locked. More...

MStatus	setLocked (bool locked)
	Locks or unlocks this node. More...

bool	isNewAttribute (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Indicates whether or not the specified attribute was added to this node within the current scene. More...

MStatus	setFlag (unsigned int flag, bool state)
	Sets the state of the specified flag for the node. More...

bool	isFlagSet (unsigned int flag, MStatus *ReturnStatus=NULL) const
	Retrieves the current state of the specified flag for a node. More...

bool	isDefaultNode (MStatus *ReturnStatus=NULL) const
	Returns true if the node is a default node. More...

MStatus	setDoNotWrite (bool flag)
	Use this method to mark the "do not write" state of this node. More...

bool	canBeWritten (MStatus *ReturnStatus=NULL) const
	Returns the do not write state of the node. More...

bool	hasAttribute (const MString &name, MStatus *ReturnStatus=NULL) const
	Returns true if the node already has an attribute with the given name. More...

MObject	getAliasAttr (bool force, MStatus *ReturnStatus=NULL)
	Returns the node's alias attribute, which is a special attribute used to store information about the node's attribute aliases. More...

bool	setAlias (const MString &alias, const MString &name, const MPlug &plug, bool add=true, MStatus *ReturnStatus=NULL)
	Sets or removes an alias (i.e. More...

bool	findAlias (const MString &alias, MObject &attrObj, MStatus *ReturnStatus=NULL) const
	Retrieves the attribute with the given alias. More...

bool	getAliasList (MStringArray &strArray, MStatus *ReturnStatus=NULL)
	Returns a list of all attribute aliases for this node. More...

MString	plugsAlias (const MPlug &plug, MStatus *ReturnStatus=NULL)
	Returns the alias for the plug's attribute or the empty string if that attribute has no alias. More...

MStatus	setIcon (const MString &filename)
	Associates a custom icon with the node for display in the Maya UI. More...

MString	icon (MStatus *ReturnStatus=NULL) const
	Returns the custom icon filename associated with the node. More...

MStatus	getExternalContent (MExternalContentInfoTable &table) const
	Returns the external content (files) that this node depends on. More...

MStatus	addExternalContentForFileAttr (MExternalContentInfoTable &table, const MObject &attr) const
	Adds content info to the specified table from a file path attribute. More...

MStatus	setExternalContentForFileAttr (const MObject &attr, const MExternalContentLocationTable &table)
	Sets content info in the specified attribute from the table. More...

MStatus	setExternalContent (const MExternalContentLocationTable &table)
	Changes the location of external content. More...

MString	setName (const MString &name, MStatus *ReturnStatus)
	OBSOLETE FUNCTION, NO SCRIPT SUPPORT. More...

	MFnDependencyNode (const MObject &object, MStatus *ReturnStatus=NULL)
	NO SCRIPT SUPPORT. More...

bool	getPlugsAlias (const MPlug &plug, MString &aliasName, MStatus *ReturnStatus=NULL)
	NO SCRIPT SUPPORT. More...

virtual const adsk::Data::Associations *	metadata (MStatus *ReturnStatus=NULL) const
	This method is not available in Python. More...

virtual MStatus	setMetadata (const adsk::Data::Associations &)
	This method is not available in Python. More...

virtual MStatus	deleteMetadata ()
	This method is not available in Python. More...

virtual MStatus	validateMetadata (MString &errors) const
	This method is not available in Python. More...

MStatus	dgTimerOn ()
	Indicates that this node should collect DG timing data whenever DG timing is enabled. More...

MStatus	dgTimerOff ()
	Indicates that this node should no longer collect DG timing data when DG timing is enabled. More...

MdgTimerState	dgTimerQueryState (MStatus *ReturnStatus=NULL)
	The function returns the current on/off state of the node's timer. More...

MStatus	dgTimerReset ()
	The function resets the dependency graph timers and counters for this node to zero. More...

double	dgTimer (const MdgTimerMetric timerMetric, const MdgTimerType timerType, MStatus *ReturnStatus=NULL) const
	The function returns the specified timer value for the current node. More...

MStatus	dgCallbacks (const MdgTimerType type, MStringArray &callbackName, MDoubleArray &value)
	Node callbacks that occur when timing is enabled get logged with the node and can be queried via this method. More...

MStatus	dgCallbackIds (const MdgTimerType type, const MString &callbackName, MCallbackIdArray &callbackId, MDoubleArray &value)
	This method provides a further breakdown of the per-callback time returned via dgCallbacks() by returning the data on a per-callbackId basis. More...

MStatus	addAttribute (const MObject &attr, MAttrClass type)
	This method is obsolete. More...

MStatus	removeAttribute (const MObject &attr, MAttrClass type)
	This method is obsolete. More...

Public Member Functions inherited from MFnBase
virtual	~MFnBase ()
	Class Destructor. More...

bool	hasObj (MFn::Type) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...

bool	hasObj (const MObject &) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...

MObject	object (MStatus *ReturnStatus=NULL) const
	Returns the MObject that is attached to the Function Set. More...

Protected Member Functions
virtual const char *	className () const
	Class name. More...

Additional Inherited Members
Public Types inherited from MFnDagNode
enum	{ kNextPos = 0xff }
	Anonymous enum to store constant values. More...

enum	MObjectColorType { kUseDefaultColor = 0, kUseIndexColor, kUseRGBColor }
	Enum to set how an object is colored. More...

Public Types inherited from MFnDependencyNode
enum	MAttrClass { kLocalDynamicAttr = 1, kNormalAttr, kExtensionAttr, kInvalidAttr }
	Specifies the scope of the attribute. More...

enum	MdgTimerState { kTimerOff, kTimerOn, kTimerUninitialized, kTimerInvalidState }
	Possible states for the node's timer. More...

enum	MdgTimerMetric { kTimerMetric_callback, kTimerMetric_compute, kTimerMetric_dirty, kTimerMetric_draw, kTimerMetric_fetch, kTimerMetric_callbackViaAPI, kTimerMetric_callbackNotViaAPI, kTimerMetric_computeDuringCallback, kTimerMetric_computeNotDuringCallback, kTimerMetrics }
	The different timer metrics which can be queried. More...

enum	MdgTimerType { kTimerType_self, kTimerType_inclusive, kTimerType_count, kTimerTypes }
	The types of timers which can be queried. More...

Static Public Member Functions inherited from MFnDependencyNode
static MString	classification (const MString &nodeTypeName)
	Retrieves the classification string for a node type. More...

static unsigned int	allocateFlag (const MString pluginName, MStatus *ReturnStatus=NULL)
	Allocates a node flag for sole use by the caller. More...

static MStatus	deallocateFlag (const MString pluginName, unsigned int flag)
	Deallocates a node flag which was previously allocated by a call to allocateFlag. More...

static MStatus	deallocateAllFlags (const MString pluginName)
	Deallocates all of the node flags which are currently allocated to the specified plugin. More...

static void	enableDGTiming (bool enable)
	Globally enables or disables the DG node timing mechanism. More...

Static Public Member Functions inherited from MFnBase
static const char *	className ()
	Returns the name of this class. More...

Constructor & Destructor Documentation

~MFnSubd ( )

virtual

Destructor.

Class destructor.

MFnSubd	(	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

MFnSubd	(	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

MFnSubd	(	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 type ( ) const

virtual

Function set type.

Return the class type : MFn::kSubdiv.

Reimplemented from MFnDagNode.

const char * className ( ) const

protectedvirtual

Class name.

Return the class name : "MFnSubd".

Reimplemented from MFnDagNode.

MObject createBaseMesh	(	bool	reverseNormal,
		int	numVertices,
		int	numPolygons,
		const MPointArray &	vertexArray,
		const MIntArray &	polygonCounts,
		const MIntArray &	polygonConnects,
		MObject	parentOrOwner = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

Creates a new subdivision surface given an array of vertices and connection information and sets this function set to operate on the new surface.

This method is meant to be as efficient as possible and thus assumes that all the given data is topologically correct.

The parentOrOwner argument is used to specify the owner of the new surface.

If the parentOrOwner is kSubdivData then the created surface will be of type kSubdivGeom and will be returned. The parentOrOwner will become the owner of the new subdivision surface.

If parentOrOwner is NULL then a new transform will be created and returned which will be the parent for the subdivision surface. The new transform will be added to the DAG.

If parentOrOwner is a DAG node then the new subdivision surface will be returned and the parentOrOwner will become its parent.

Parameters

[in]	reverseNormal	Not currently used
[in]	numVertices	number of vertices
[in]	numPolygons	number of polygons
[in]	vertexArray	point (vertex) array
[in]	polygonCounts	array of vertex counts for each polygon
[in]	polygonConnects	array of vertex connections for each polygon
[in]	parentOrOwner	parent of the polygon that will be created
[out]	ReturnStatus	Status code

Returns

If parentOrOwner is NULL then the transform for this surface is returned
If parentOrOwner is a DAG object then the new surface shape is returned
The surface geometry is returned if parentOrOwner is of type kSubdivData

Status Codes:

MS::kSuccess The method was successful.
MS::kLicenseFailure Application not licensed for attempted operation
MS::kInvalidParameter Array length does not match given item count, or parentOrOwner was not valid, or there was no model present to add the object to.
MS::kFailure An object error has occurred.
MS::kInsufficientMemory Insufficient memory to complete this method

MObject copy	(	const MObject &	source,
		MObject	parentOrOwner = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

This method creates a copy of a given source subdivision surface.

After the copy this function set will operate on the new subdivision surface.

The parentOrOwner argument is used to specify the owner of the new surface.

If the parentOrOwner is kSubdivData then the created surface will be of type kSubdivGeom and will be returned. The parentOrOwner will become the owner of the new subdivision surface.

If parentOrOwner is NULL then a new transform will be created and returned which will be the parent for the subdivision surface. The new transform will be added to the DAG.

If parentOrOwner is a DAG node then the new subdivision surface will be returned and the parentOrOwner will become its parent.

Parameters

[in]	source	the subdivision surface to be copied
[in]	parentOrOwner	the DAG parent or kSubdivData the new subdivision surface will belong to
[out]	ReturnStatus	Status code

Returns

If parentOrOwner is NULL then the transform for this surface is returned
If parentOrOwner is a DAG object then the new surface shape is returned
The surface geometry is returned if parentOrOwner is of type kSubdivData

Status Codes:

MS::kSuccess The method was successful.
MS::kLicenseFailure Application not licensed for attempted operation
MS::kInvalidParameter parentOrOwner was not valid; or the source object was not one of kSubdivGeom, kSubdivData or kSubdiv; or dataSubdiv or underlying geometry was null; or source object was null; or there was no model present to add the object to.
MS::kFailure An object error has occurred.
MS::kInsufficientMemory Insufficient memory to complete this method

MObject collapse	(	const int	level,
		bool	makeNewNodeInvisible,
		MStatus *	ReturnStatus = `NULL`
	)

This method creates a copy of a given source subdivision surface collapsed by the given number of levels.

After the collapse this function set will operate on the new subdivision surface.

As an example, a collapse of one level means the level one vertices of the current subdivision surface become the level zero vertices of the new subdivision surface.

Be careful passing in a large value for the level, as each level of collapse increases the number of faces on the new subdivision surface significantly.

Collapsing a surface by one level means that the resulting surface is all quads. This can be useful in certain situations.

NOTE: the collapse() method will fail if the function set has not been initialized with a dag path.

Parameters

[in]	level	the number of levels of the hierarchy to collapse
[in]	makeNewNodeInvisible	sets the invisible attribute of the new node
[out]	ReturnStatus	Status code

Returns: The new collapsed subdivision object

Status Codes:

MS::kSuccess The method was successful.
MS::kLicenseFailure Application not licensed for attempted operation
MS::kInvalidParameter One of the following parameter errors
MS::kFailure An object error has occurred.

int vertexBaseMeshAdd	(	double	x,
		double	y,
		double	z,
		MStatus *	ReturnStatus = `NULL`
	)

Add a vertex to the base mesh and return its "index" name.

Note that it will not have a valid 64-bit name until you actually create a polygon that holds it.

Parameters

[in]	x	X location of the vertex
[in]	y	Y location of the vertex
[in]	z	Z location of the vertex
[out]	ReturnStatus	Status code

Returns: The index of the newly created vertex. It will be -1 if the creation failed.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MUint64 polygonBaseMeshAdd	(	int	vertexCount,
		const int	vertexIndex[],
		MStatus *	ReturnStatus = `NULL`
	)

Add a polygon at the base mesh level.

You will need to use the index names of the vertices (remember, they get their 64-bit names only after they have been added to a polygon).

Parameters

[in]	vertexCount	Number of vertices in the polygon
[in]	vertexIndex	The vertex indices (0, 1, 2, ...)
[out]	ReturnStatus	Status code

Returns: The name of the newly created polygon

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MUint64 polygonBaseMeshAddWithUVs	(	int	vertexCount,
		const int	vertexIds[],
		const double	uValues[],
		const double	vValues[],
		MStatus *	ReturnStatus = `NULL`
	)

Add a polygon at the base mesh level.

You will need to use the index names of the vertices (remember, they get their 64-bit names only after they have been added to a polygon). Specify the UV values as well.

Parameters

[in]	vertexCount	Number of vertices in the polygon
[in]	vertexIds	The vertex indices (0, 1, 2, ...)
[in]	uValues	U values for each vertex
[in]	vValues	V values for each vertex
[out]	ReturnStatus	Status code

Returns: The name of the newly created polygon

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

int editsPending ( MStatus * ReturnStatus = NULL ) const

As the new hierarchical vertex offsets are being introduced, you can choose to not apply them to the surface immediatelly.

If you do that, the number of edits pending will increase. Any edits are not actually made until you call "updateEdits". This functions lets you know if you need to call it or not.

Parameters

[out] ReturnStatus Status code

Returns: Edits pending (1) or not (0).

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

void editsUpdateAll ( MStatus * ReturnStatus = NULL )

If there are pending edits, this function will update the surface so that there are no pending edits.

Parameters

[out] ReturnStatus Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int levelMaxCurrent ( MStatus * ReturnStatus = NULL ) const

Returns the finest level that currently exist.

As int as a single face exists at a level, that level is counted. Note that this not mean that all of the faces exist on all levels.

Parameters

[out] ReturnStatus Status code

Returns: The finest level in the hierarchy

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int levelMaxAllowed ( MStatus * ReturnStatus = NULL ) const

Returns the maximum level that can be created.

You should probably avoid fully subdividing the surface to that level as you will most likelly just run out of memory.

Parameters

[out] ReturnStatus Status code

Returns: The maximum possibly value for the finest level in the hierarchy

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

void levelFullySubdivideTo	(	int	level,
		MStatus *	ReturnStatus = `NULL`
	)

Fully subdivide the whole surface to the specified level.

This could be very expensive, so be careful, or you will run out of memory. As a rule, each level has 4 times more faces than the previous one.

Parameters

[in]	level	The level to which to fully subdivide
[out]	ReturnStatus	Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int vertexCount	(	int	level = `0`,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns the finest vertex count at a particular level.

These are the vertices that are currently instantiated.

Parameters

[in]	level	The level we are interested in
[out]	ReturnStatus	Status code

Returns: The number of vertices at the given level

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MUint64 vertexIdFromBaseVertexIndex	(	int	baseVertexIndex,
		MStatus *	ReturnStatus = `NULL`
	)		const

Vertices are named using 64-bit integers.

The base mesh vertices will also have a simple 0, 1, 2, N-1 indices. Use this function to compute the proper 64-bit name using the 0, 1, 2, ... indices.

Parameters

[in]	baseVertexIndex	The index in the base mesh vertex array of this vertex
[out]	ReturnStatus	Status code

Returns: The 64-bit name of the vertex

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

int vertexBaseIndexFromVertexId	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Given a 64-bit id of the vertex, return its index (0, 1, ...) if it happens to be a base mesh vertex.

It is an error to call this function with a non base mesh vertex.

Parameters

[in]	vertexId	The 64-bit name of the vertex
[out]	ReturnStatus	Status code

Returns: The index in the base mesh vertex array of this vertex

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexEditsGetAllNonBase	(	MUint64Array &	vertexIds,
		MVectorArray &	edits,
		MSpace::Space	space = `MSpace::kObject`
	)		const

Returns all the vertices below the base mesh that have been modified from their original position (the original position is specified by the position of the base mesh vertices).

The two arrays will be of the same length upon return. Length 0 would suggest that there have been no edits from the original positions.

Parameters

[in]	vertexIds	The names of the vertices
[in]	edits	The offsets from the original position
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexEditsSetAllNonBase	(	const MUint64Array &	vertexIds,
		const MVectorArray &	edits,
		MSpace::Space	space = `MSpace::kObject`
	)

Given an array of vertex names and the offsets from their original positions, set the new vertex positions.

Parameters

[in]	vertexIds	The names of the vertices
[in]	edits	The offsets from the original positions
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexEditsClearAllNonBase ( )

Find all vertices with edits and remove those edits, setting them back to their original position.

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexPositionGet	(	MUint64	vertexId,
		MPoint &	position,
		MSpace::Space	space = `MSpace::kObject`
	)		const

Get the position of the vertex with a given name.

Parameters

[in]	vertexId	The name of the vertex
[out]	position	The vertex position in the appropriate space
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexEditGet	(	MUint64	vertexId,
		MVector &	edit,
		MSpace::Space	space = `MSpace::kObject`
	)		const

Get the offset of the specified vertex from its original position.

This vector really is vertexPositionGet() - vertexPositionGetNoEdit().

Parameters

[in]	vertexId	The name of the vertex
[out]	edit	The offset in object space
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexPositionGetNoEdit	(	MUint64	vertexId,
		MPoint &	position,
		MSpace::Space	space = `MSpace::kObject`
	)		const

What would the position of this vertex be if there were no edits; i.e., what was its original position.

Parameters

[in]	vertexId	The name of the vertex
[out]	position	The original position
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexPositionSet	(	MUint64	vertexId,
		const MPoint &	position,
		bool	updateEdits,
		MSpace::Space	space = `MSpace::kObject`
	)

Set the position of the vertex with a given name.

Parameters

[in]	vertexId	The vertex name
[out]	position	The new vertex position
[in]	updateEdits	If false, you will need to call updateSubdSurface() before any change would be applied. Further, you must set this to true before you start calling the same function on the vertices of the finer levels.
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexEditSet	(	MUint64	vertexId,
		const MVector &	edit,
		bool	updateEdits,
		MSpace::Space	space = `MSpace::kObject`
	)

Set the original position offset for the given vertex.

Parameters

[in]	vertexId	The name of the vertex
[in]	edit	The offset to set
[in]	updateEdits	If false, you will need to call updateSubdSurface() before any change would be applied. Further, you must set this to true before you start calling the same function on the vertices of the finer levels.
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexBaseMeshGet	(	MPointArray &	positions,
		MSpace::Space	space = `MSpace::kObject`
	)		const

Return all base mesh vertices in the array using their indices (not the 64-bit names).

Parameters

[out]	positions	The array of point positions
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexBaseMeshSet	(	const MPointArray &	positions,
		MSpace::Space	space = `MSpace::kObject`
	)

Set the positions for the base mesh vertices using the 0, 1,...

indexing instead of the 64-bit vertex names.

Parameters

[out]	positions	The positions for the vertices
[in]	space	Specifies the coordinate system for this operation

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexBaseMeshGetWithId	(	MPointArray &	positions,
		MUint64Array &	vertexIds,
		MSpace::Space	space = `MSpace::kObject`
	)		const

Return all base mesh vertices in the array using their indices but also provide the 64-bit names.

Parameters

[out]	positions	The array of point positions
[out]	vertexIds	The vertex 64-bit ids
[in]	space	The space we are working in

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexBaseMeshSetWithId	(	const MPointArray &	positions,
		const MUint64Array &	vertexIds,
		MSpace::Space	space = `MSpace::kObject`
	)

Set the positions for the base mesh vertices using the 64-bit names.

The ordering of the elements in the array is irrelevant. The edits will be automatically updated (i.e., editsPending() will return 0 after the call to this function).

Parameters

[out]	positions	The positions for the vertices
[out]	vertexIds	The vertex 64-bit ids
[in]	space	The space we are working in

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

int vertexValence	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns the valence (number of incident edges) of the given vertex.

Parameters

[in]	vertexId	The vertex 64-bit id
[out]	ReturnStatus	Status code

Returns: The finest level in the hierarchy

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexNormal	(	MUint64	vertexId,
		MVector &	normal
	)		const

Returns the normal at the vertex.

Parameters

[in]	vertexId	The vertex 64-bit ID.
[out]	normal	The value of the normal

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexAdjacentVertices	(	MUint64	vertexId,
		MUint64Array &	vertList
	)		const

Return the list of adjacent vertices as their 64-bit ids.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	vertList	The resulting list of adjacent vertices

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexIncidentEdges	(	MUint64	vertexId,
		MUint64Array &	edgeList
	)		const

Return the list of incident edges as their 64-bit ids.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	edgeList	The resulting list of incident edges

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexIncidentPolygons	(	MUint64	vertexId,
		MUint64Array &	polyList
	)		const

Return the list of incident polygons as their 64-bit ids.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	polyList	The resulting list of incident polygons

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool vertexIsBoundary	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the vertex is a boundary vertex.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the vertex is boundary or not

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool vertexIsValid	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the vertex is a valid vertex.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the vertex is valid or not. Valid means that the vertex has been instantiated on the surface. Not all vertices at all levels exist by default. A vertex only exists if it was created at the time the subdiv was first created or if the subdiv was refined.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool vertexIsCreased	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the vertex is creased.

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the vertex is creased or not

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool vertexCreaseRelevant	(	MUint64	vertexId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the crease of the vertex is a relevant piece of information.

The vertex inherits the crease state from its parent. So, its crease state is relevant only if different from its parent (or if there is no direct parent vertex).

Parameters

[in]	vertexId	The vertex 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the vertex has relevant crease information

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexSetCrease	(	MUint64	vertexId,
		bool	creased
	)		const

Set the particular vertex' crease state.

Parameters

[in]	vertexId	The 64-bit name of the vertex
[in]	creased	Crease (true) or smooth (false)

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus vertexChildren	(	MUint64	vertexId,
		MUint64Array &	children
	)		const

Returns the "children" of the particular vertex if they exist.

The children are defined as the finer-level version of the current vertex plus the neighbors of that vertex. For a valence n vertex this means 2n+1 vertices are returned if a finer level exists.

Parameters

[in]	vertexId	64-bit name of the vertex
[out]	children	64-bit names of the children of this vertex

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus creasesGetAll	(	MUint64Array &	vertexIds,
		MUint64Array &	edgeIds
	)		const

Returns all creases on the subdivision surface in two arrays of 64-bit ids; one for the vertices, one for edges.

Note that this information alone is not suitable for "copying" the surface; there may be some relevant crease information in the non-creased vertices or edges which will not be part of the arrays returned here. Consider a vertex at level N that is creased while the corresponding vertex at level N+1 is not creased. Calling creasesGetAll will return the level N vertex. Applying the creasing to this vertex in the copy will also set the vertex at level N+1 to be creased as well, since vertices inherit creasing from their parent unless they have a different creasing set explicitly. So to get correct behavior when copying surfaces it is necessary to set the creasing attribute explicitly to the appropriate value on all the vertices, not just the creased vertices. The same applies to edges.

Parameters

[out]	vertexIds	The ids of the vertices that are creased
[out]	edgeIds	The ids of the edges that are creased

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus creasesSetAll	(	const MUint64Array &	vertexIds,
		const MUint64Array &	edgeIds
	)

Set the creases on all vertices and edges with a given 64-bit name.

Note that the combination of creasesGetAll() and creasesSetAll() will not exactly duplicate the crease information between two surfaces.

Parameters

[in]	vertexIds	The ids of the vertices that are creased
[in]	edgeIds	The ids of the edges that are creased

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus creasesClearAll ( ) const

Clear all crease information from this surface.

No vertices or edges will be creased after this function completes.

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus updateAllEditsAndCreases ( )

If you have been editing offsets without updating the surface, this function will save you.

This will dirty up the complete surface and recompute the positions of all the cvs, updating the crease info along the way. Not cheap to call.

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int edgeCount	(	int	level = `0`,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns the number of edges at a level.

Parameters

[in]	level	The level where we're counting the edges
[out]	ReturnStatus	Status code

Returns: Number of edges at the given level

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MUint64 edgeBetween	(	MUint64	vertex1,
		MUint64	vertex2,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return the name of the edge that connects the two vertices.

If the edge doesn't exist, it will be created.

Parameters

[in]	vertex1	The name of the first vertex
[in]	vertex2	The name of the second vertex
[out]	ReturnStatus	Status code

Returns: The name of the edge between the two

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus edgeVertices	(	MUint64	edgeId,
		MUint64 &	v1,
		MUint64 &	v2
	)		const

Given an edge, return the two vertices at its ends.

Parameters

[in]	edgeId	The 64-bit edge name
[out]	v1	First vertex on the edge
[out]	v2	Second vertex on the edge

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus edgeAdjacentPolygon	(	MUint64	edgeId,
		MUint64Array &	polys
	)		const

Return the polygons adjacent to this edge.

There can be at most two, as non-manifold topology is not allowed.

Parameters

[in]	edgeId	The 64-bit edge name
[out]	polys	The 64-bit names of the polygons (1 or 2)

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool edgeIsBoundary	(	MUint64	edgeId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Test if the edge specified is a boundary edge or not.

Parameters

[in]	edgeId	The 64-bit edge name
[out]	ReturnStatus	Status code

Returns: True if the edge is a boundary edge, false otherwise.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool edgeIsValid	(	MUint64	edgeId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns true if the specified edge name is valid.

Parameters

[in]	edgeId	The 64-bit edge name
[out]	ReturnStatus	Status code

Returns: True if the edge name is valid, false otherwise.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool edgeIsCreased	(	MUint64	edgeId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the edge is creased.

Parameters

[in]	edgeId	The 64-bit name of the edge
[out]	ReturnStatus	Status code

Returns: True if the edge is creased, false otherwise

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool edgeCreaseRelevant	(	MUint64	edgeId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the crease of the edge is a relevant piece of information.

The edge inherits the crease state from its parent. So, its crease state is relevant only if different from its parent (or if there is no direct parent edge).

Parameters

[in]	edgeId	The edge 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the edge has relevant crease information

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus edgeSetCrease	(	MUint64	edgeId,
		bool	creased
	)		const

Set the particular edge's crease state.

Parameters

[in]	edgeId	The 64-bit name of the edge
[in]	creased	Crease (true) or smooth (false)

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus edgeChildren	(	MUint64	edgeId,
		MUint64Array &	children
	)		const

Returns the "children" of the particular edge.

If the edge has children, there will always be two child edges.

Parameters

[in]	edgeId	64-bit name of the edge
[out]	children	64-bit names of the children of this edge

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int polygonCount	(	int	level = `0`,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns the number of polygons currently existing at the specified level of the hierarchy.

Parameters

[in]	level	Level at which we're counting
[out]	ReturnStatus	Status code

Returns: The number of polygons at the specified level

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

int polygonCountMaxWithGivenBaseMesh	(	int	level = `1`,
		MStatus *	ReturnStatus = `NULL`
	)		const

If you were to fully subdivide at a given level, how many polygons would you have at that level? This function will tell you and possibly save you from running out of memory if you go too deep.

Note that this is exactly the same as "polygonCount" for levels 0 and 1.

Parameters

[in]	level	The level where you would be counting
[out]	ReturnStatus	Status code

Returns: The number of polygons at the given level if you were to fully subdivide at that level.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int polygonVertexCount	(	MUint64	polyId,
		MStatus *	ReturnStatus = `NULL`
	)		const

How many vertices on a given polygon? The vertices are at the same level as the polygon.

Parameters

[in]	polyId	The 64-bit name of the polygon
[out]	ReturnStatus	Status code

Returns: The number of vertices on this polygon

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonVertices	(	MUint64	polyId,
		MUint64Array &	vertexIds
	)		const

Given the polygon, return its vertices.

The vertices are at the same level as the polygon.

Parameters

[in]	polyId	The 64-bit name of the polygon
[out]	vertexIds	The 64-bit names of the vertices

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

unsigned int polygonEdgeCount	(	MUint64	polyId,
		MStatus *	ReturnStatus = `NULL`
	)		const

The number of edges on the given polygon.

Parameters

[in]	polyId	The 64-bit name of the polygon
[out]	ReturnStatus	Status code

Returns: The number of edges on this polygon

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonEdges	(	MUint64	polyId,
		MUint64Array &	edgeIds
	)		const

Given the polygon, return its edges.

The edges are at the same level as the polygon.

Parameters

[in]	polyId	The 64-bit name of the polygon
[out]	edgeIds	The 64-bit names of the edges

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool polygonIsValid	(	MUint64	polygonId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Return true if the polygon is a valid polygon.

Parameters

[in]	polygonId	The polygon 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the polygon is valid or not. Valid means that the polygon has been instantiated on the surface. Not all polygons at all levels exist by default. A polygon only exists if it was created at the time the subdiv was first created or if the subdiv was refined.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool polygonHasChildren	(	MUint64	polyId,
		MStatus *	ReturnStatus = `NULL`
	)		const

Returns whether or not the given polygon has children.

Parameters

[in]	polyId	The polygon 64-bit name
[out]	ReturnStatus	Status code

Returns: Whether the polygon has children.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This can happen if the polyId passed in refers to a face that is not currently instantiated on the surface.

MStatus polygonChildren	(	MUint64	polyId,
		MUint64Array &	children
	)		const

Returns the list of children polygons on the given polygon.

If the children array is not empty, we will just append to it.

Parameters

[in]	polyId	The 64-bit name of the original polygon
[out]	children	The 64-bit name of the child polygons

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This can happen if the polyId passed in refers to a face that is not currently instantiated on the surface.

MStatus polygonSubdivide ( MUint64 polyId )

Subdivide the given polygon into 4 children (if this happens to be the level 0 polygon you will get as many children as that polygon has edges).

Parameters

[in] polyId The 64-bit name of the polygon

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonSetUseUVs	(	MUint64	polyId,
		bool	useThem
	)

If this is set, the polygon will use the user specified UVs.

Parameters

[in]	polyId	The 64-bit polygon name
[in]	useThem	Use the user set UVs

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool polygonHasVertexUVs	(	MUint64	polyId,
		MStatus *	ReturnStatus = `NULL`
	)

Returns true if there are user specified UVs on this polygon.

Parameters

[in]	polyId	The 64-bit polygon name
[out]	ReturnStatus	Status code

Returns: True if there were explicitly specified UVs on this polygon.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonGetVertexUVs	(	MUint64	polyId,
		MDoubleArray &	uValues,
		MDoubleArray &	vValues
	)		const

Get the vertex UVs from the polygon.

The values come back in exactly the same order as the polygon vertices do.

Parameters

[in]	polyId	The 64-bit polygon name
[out]	uValues	Array of U values
[out]	vValues	Array of V values

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonSetVertexUVs	(	MUint64	polyId,
		const MDoubleArray &	uValues,
		const MDoubleArray &	vValues
	)

Set the UV values on the polygon.

Parameters

[in]	polyId	The 64-bit polygon name
[in]	uValues	Array of U values
[in]	vValues	Array of V values

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus polygonGetCenterUV	(	MUint64	polyId,
		double &	u,
		double &	v
	)		const

Return the UV values in the "center" of this polygon.

Parameters

[in]	polyId	The 64-bit polygon name
[out]	u	The resulting U value
[out]	v	The resulting V value

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus evaluatePosition	(	MUint64	polyId,
		double	u,
		double	v,
		bool	uvNormalized,
		MPoint &	pos
	)		const

Evaluate the surface position at the given parameter point on the polygon.

The limitation is that this cannot be a base mesh polygon; i.e., it has to be at least level 1.

Parameters

[in]	polyId	The 64-bit polygon name
[in]	u	U value on the face
[in]	v	V value on the face
[in]	uvNormalized	If true, its as if U, V are in [0,1]
[out]	pos	The resulting 3d position

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus evaluateNormal	(	MUint64	polyId,
		double	u,
		double	v,
		bool	uvNormalized,
		MVector &	nrml
	)		const

Evaluate the surface normal at the given parameter point on the polygon.

The limitation is that this cannot be a base mesh polygon; i.e., it has to be at least level 1.

Parameters

[in]	polyId	The 64-bit polygon name
[in]	u	U value on the face
[in]	v	V value on the face
[in]	uvNormalized	If true, its as if U, V are in [0,1]
[out]	nrml	The resulting surface normal

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus evaluatePositionAndNormal	(	MUint64	polyId,
		double	u,
		double	v,
		bool	uvNormalized,
		MPoint &	pos,
		MVector &	nrml
	)		const

Evaluate the surface position and normal at the given parameter point on the polygon.

The limitation is that this cannot be a base mesh polygon; i.e., it has to be at least level 1.

Parameters

[in]	polyId	The 64-bit polygon name
[in]	u	U value on the face
[in]	v	V value on the face
[in]	uvNormalized	If true, its as if U, V are in [0,1]
[out]	pos	The resulting 3d position
[out]	nrml	The resulting surface normal

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool getCubicSpline	(	MUint64	polyId,
		MPointArray	vertices,
		MStatus *	ReturnStatus = `NULL`
	)

Some of the faces (usually at level 2 or below) happen to be exactly the same as uniform bi-cubic B-splines.

This routine will return the 16 points that define such spline.

Parameters

[in]	polyId	The 64-bit polygon name
[out]	vertices	point array
[out]	ReturnStatus	Status code

Returns: True if we can make the conversion, false otherwise

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus getConnectedShaders	(	unsigned int	instanceNumber,
		MObjectArray &	shaders,
		MUint64Array &	faces,
		MIntArray &	indices
	)		const

Returns all the shaders (sets) connected to the specified instance of this subdivision surface and two arrays indicating face/shader assignments.

For each face in the face array, there is a corresponding entry in the indices array to indicate the assigned shader in the shader array.

For instance, faces[0] is the 64-bit index of the face on the subdivision surface. Then indices[0] is an index into the shaders array, eg. "3". Then shaders[3] is the shader assigned to the subdivision surface face.

If a face does not have a shader assigned to it, the value of the index will be -1. The shader objects can be derived from the sets returned.

[in]	instanceNumber	The instance number of the subdivision surface to query
[out]	shaders	Storage for set objects (shader objects)
[out]	faces	Storage for indices matching faces to indices
[out]	indices	Storage for indices matching indices to shaders

MObject tesselate	(	bool	uniform,
		int	depth,
		int	sample,
		MObject	parentOrOwner = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

[in]	uniform	Use uniform tesselation if this is set.
[in]	depth	Used in the uniform tesselation: how deep do we go
[in]	sample	In both tesselation cases, once we decide which level to tesselate at, how many times do we sample.
[in]	parentOrOwner	the DAG parent or kMeshData the new Mesh will belong to
[out]	ReturnStatus	Status Code

MObject tessellateViaNurbs	(	MObject	parentOrOwner = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

MStatus vertexBaseMeshAddWithIndex	(	double	x,
		double	y,
		double	z,
		int	index
	)

MFnSubd Class Reference

Class Description

Public Member Functions

Protected Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation