MItMeshFaceVertex Class Reference

Search for all occurrences

---

Detailed Description

Face vertex iterator.

This class is the iterator for face vertices on polygonal surfaces.

The iterator functions in two modes depending on whether a component is specified. When a component is not given or is NULL the iteration will be over all polygons for the surface. When a component is given this iterator will iterate over the polygons specified in the component. When iterating over components a DAG path to the surface must also be supplied.

#include <MItMeshFaceVertex.h>

List of all members.

Public Member Functions
	MItMeshFaceVertex (const MObject &polyObject, MStatus *ReturnStatus=NULL)
	Constructor.
	MItMeshFaceVertex (const MDagPath &polyObject, MObject &component=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Constructor.
virtual	~MItMeshFaceVertex ()
	Destructor.
bool	isDone (MStatus *ReturnStatus=NULL)
	Indicates if all of the face vertices have been traversed.
MStatus	next ()
	Advance to the next face vertext in the iteration.
MStatus	reset ()
	Reset the iterator to the first face vertex.
MStatus	reset (const MObject &polyObject)
	Reset the iterator to the first polygon in the supplied surface.
MStatus	reset (const MDagPath &polyObject, MObject &component=MObject::kNullObj)
	Reset the iterator with the given surface and component.
int	vertId (MStatus *ReturnStatus=NULL) const
	Returns the index of the current face vertex.
int	faceId (MStatus *ReturnStatus=NULL) const
	Returns the current face index.
int	faceVertId (MStatus *ReturnStatus=NULL) const
	Returns the relative index of the vertex within the current face.
MObject	faceVertex (MStatus *ReturnStatus=NULL) const
	This method is obsolete.
MObject	currentItem (MStatus *ReturnStatus=NULL) const
	Returns the double componet index of the vertex and face.
MPoint	position (MSpace::Space space=MSpace::kObject, MStatus *ReturnStatus=NULL)
	Return the position of the current face vertex.
MStatus	getNormal (MVector &normal, MSpace::Space space=MSpace::kObject) const
	Return the face vertex normal.
int	normalId (MStatus *ReturnStatus=NULL) const
	Returns the normal index for the specified vertex.
int	tangentId (MStatus *ReturnStatus=NULL) const
	Returns the tangent (or binormal) index for the specified vertex.
MVector	getTangent (MSpace::Space space=MSpace::kObject, const MString *uvSet=NULL, MStatus *ReturnStatus=NULL) const
	Return the face vertex tangent associated with the given UV set.
MVector	getBinormal (MSpace::Space space=MSpace::kObject, const MString *uvSet=NULL, MStatus *ReturnStatus=NULL) const
	Return the face vertex binormal associated with the UV set.
bool	hasUVs (MStatus *ReturnStatus=NULL) const
	Does this face vertex has UV's mapped or not.
bool	hasUVs (const MString &uvSet, MStatus *ReturnStatus=NULL) const
	Does this face vertex has UV's mapped or not in a given uv set.
MStatus	getUV (float2 &uvPoint, const MString *uvSet=NULL) const
	Return the texture coordinate for the current face vertex.
MStatus	getUVIndex (int &index, const MString *uvSet=NULL)
	Returns the index of the texture coordinate for the current face vertex.
MStatus	getUVIndex (int &index, float &u, float &v, const MString *uvSet=NULL)
	Return the index of the texture coordinate for the current face vertex.
bool	hasColor (MStatus *ReturnStatus=NULL) const
	This method determines whether the current face vertex has color-per-vertex set.
MStatus	getColor (MColor &color, const MString *colorSetName=NULL)
	Return a color of the current face vertex.
MStatus	getColorIndex (int &colorIndex, const MString *colorSetName=NULL)
	Return a color index of the current face vertex.
MStatus	updateSurface ()
	Signal that this polygonal surface has changed and needs to redraw itself.
MStatus	geomChanged ()
	Reset the geom pointer in the MItMeshFaceVertex.
MStatus	setIndex (int faceId, int vertFaceId, int &prevFaceId, int &prevVertId)
	This method sets the index of the current face vertex to be accessed.
Static Public Member Functions
static const char *	className ()
	Returns the name of this class.

---

Constructor & Destructor Documentation

MItMeshFaceVertex	(	const MObject &	polyObject,
		MStatus *	ReturnStatus = NULL
	)

Constructor.

Creates an iterator for all face vertices of the given surface.

Parameters:

[in]	polyObject	The surface to iterate over
[out]	ReturnStatus	Status code

Status Codes:

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

MItMeshFaceVertex	(	const MDagPath &	polyObject,
		MObject &	component = MObject::kNullObj,
		MStatus *	ReturnStatus = NULL
	)

Constructor.

Creates an iterator for the face vertices of the given component. If no component is specified then the iteration will be for all polygons of the given surface.

Parameters:

[in]	polyObject	The surface to iterate over
[in]	component	The polygons of the polyObject to iterate over
[out]	ReturnStatus	Status code

Status Codes:

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

~MItMeshFaceVertex

(

)

[virtual]

Destructor.

Frees up storage used by the iterator.

---

Member Function Documentation

bool isDone

(

MStatus *

ReturnStatus = NULL

)

Search for all occurrences

Indicates if all of the face vertices have been traversed.

Parameters:

[out]

ReturnStatus

Status code

Returns:

Boolean value: true All face vertices have been traversed, false otherwise.

Status Codes:

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

MStatus next

(

)

Search for all occurrences

Advance to the next face vertext in the iteration.

Returns:

Status code

Status Codes:

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

MStatus reset

(

)

Search for all occurrences

Reset the iterator to the first face vertex.

Returns:

Status code

Status Codes:

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

MStatus reset

(

const MObject &

polyObject

)

Search for all occurrences

Reset the iterator to the first polygon in the supplied surface.

Parameters:

[in]

polyObject

The polygonal object for the iteration

Returns:

Status code

Status Codes:

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

MStatus reset	(	const MDagPath &	polyObject,
		MObject &	component = MObject::kNullObj
	)

Search for all occurrences

Reset the iterator with the given surface and component.

If component is null then the iteration will be for all face vertices in the given surface.

Parameters:

[in]	polyObject	The surface to iterate over
[in]	component	The polygons of the polyObject to iterate over

Returns:

Status code

Status Codes:

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

int vertId

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the index of the current face vertex.

Parameters:

[out]

ReturnStatus

Status code

Returns:

The index of the current face vertex.

Status Codes:

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

int faceId

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the current face index.

Parameters:

[out]

ReturnStatus

Status code

Returns:

The index of the current face.

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

int faceVertId

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the relative index of the vertex within the current face.

This index together with the faceId can be used for a fast access to get various info stored per vertex (normals, uvs, colors).

Parameters:

[out]

ReturnStatus

Status code

Returns:

The relative index of the current vertex.

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MObject faceVertex

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

This method is obsolete.

Deprecated:

Use the MItMeshFaceVertex::currentItem method.

Returns the double componet index of the vertex and face.

Parameters:

[out]

ReturnStatus

Status code

Returns:

An MObject containing the double index.

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MObject currentItem

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the double componet index of the vertex and face.

Parameters:

[out]

ReturnStatus

Status code

Returns:

An MObject containing the double index.

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MPoint position	(	MSpace::Space	space = MSpace::kObject,
		MStatus *	ReturnStatus = NULL
	)

Search for all occurrences

Return the position of the current face vertex.

Parameters:

[in]	space	The coordinate system for this operation
[out]	ReturnStatus	Status code

Returns:

The vertex position

Status Codes:

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

MStatus getNormal	(	MVector &	normal,
		MSpace::Space	space = MSpace::kObject
	)		const

Search for all occurrences

Return the face vertex normal.

Parameters:

[out]	normal	Storage for the normal
[in]	space	The transformation space

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Unable to do world space transfromation.

int normalId

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the normal index for the specified vertex.

This index refers to an element in the normal array returned by MFnMesh::getNormals. These normals are per-polygon per-vertex normals. See the MFnMesh description for more information on normals.

Parameters:

[out]

ReturnStatus

Status code

Returns:

The index of the normal for the current vertex

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

int tangentId

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Returns the tangent (or binormal) index for the specified vertex.

This index refers to an element in the normal array returned by MFnMesh::getTangents. These tangent or binormals are per-polygon per-vertex. See the MFnMesh description for more information on tangents and binormals.

Parameters:

[out]

ReturnStatus

Status code

Returns:

The index of the tangnet for the current vertex

Status Codes:

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

MVector getTangent	(	MSpace::Space	space = MSpace::kObject,
		const MString *	uvSet = NULL,
		MStatus *	ReturnStatus = NULL
	)		const

Search for all occurrences

Return the face vertex tangent associated with the given UV set.

The tangent is defined as the surface tangent of the polygon running in the U direction.

Parameters:

[in]	space	The transformation space.
[in]	uvSet	The name of the uv set.
[out]	ReturnStatus

Returns:

The normalized tangent vector. A null vector will be returned if the tangent can't be found.

MVector getBinormal	(	MSpace::Space	space = MSpace::kObject,
		const MString *	uvSet = NULL,
		MStatus *	ReturnStatus = NULL
	)		const

Search for all occurrences

Return the face vertex binormal associated with the UV set.

Parameters:

[in]	space	The transformation space
[in]	uvSet	The name of the associated UV set.
[out]	ReturnStatus

Returns:

The normalized binormal vector. A null vector will be returned if the tangent can't be found.

bool hasUVs

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

Does this face vertex has UV's mapped or not.

Parameters:

[in]

ReturnStatus

Status Code

Returns:

Boolean value: true if the face vertex has UV's mapped, false otherwise.

Status Codes:

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

bool hasUVs	(	const MString &	uvSet,
		MStatus *	ReturnStatus = NULL
	)		const

Search for all occurrences

Does this face vertex has UV's mapped or not in a given uv set.

Parameters:

[in]	uvSet	UV set to work with
[in]	ReturnStatus	Status Code

Returns:

Boolean value: true if the face vertex has UV's mapped, false otherwise.

Status Codes:

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

MStatus getUV	(	float2 &	uvPoint,
		const MString *	uvSet = NULL
	)		const

Search for all occurrences

Return the texture coordinate for the current face vertex.

Parameters:

[out]	uvPoint	Storage for u and v values
[in]	uvSet	UV set to work with

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid vertex index given. The vertex index must be less than polygonVertexCount();

MStatus getUVIndex	(	int &	index,
		const MString *	uvSet = NULL
	)

Search for all occurrences

Returns the index of the texture coordinate for the current face vertex.

This index refers to an element of the texture coordinate array for the polygonal object returned by MFnMesh::getUVs.

Parameters:

[out]	index	Storage for the texture coordinate index of the current face vertex
[in]	uvSet	UV set to work with

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid vertex index given. The vertex index must be less than polygonVertexCount();

MStatus getUVIndex	(	int &	index,
		float &	u,
		float &	v,
		const MString *	uvSet = NULL
	)

Search for all occurrences

Return the index of the texture coordinate for the current face vertex.

This index refers to an element of the texture coordinate array for the polygonal object returned by MFnMesh::getUVs.

Parameters:

[out]	index	Storage for the texture coordinate index of the specified vertex
[out]	u	Storage for u value
[out]	v	Storage for v value
[in]	uvSet	UV set to work with

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid vertex index given. The vertex index must be less than polygonVertexCount();

bool hasColor

(

MStatus *

ReturnStatus = NULL

)

const

Search for all occurrences

This method determines whether the current face vertex has color-per-vertex set.

Parameters:

[out]

ReturnStatus

Status code

Returns:

Boolean value: true if at least one vertex has color, false otherwise.

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MStatus getColor	(	MColor &	color,
		const MString *	colorSetName = NULL
	)

Search for all occurrences

Return a color of the current face vertex.

Parameters:

[out]	color	Current face vertex color
[in]	colorSetName	Name of the color set.

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MStatus getColorIndex	(	int &	colorIndex,
		const MString *	colorSetName = NULL
	)

Search for all occurrences

Return a color index of the current face vertex.

Parameters:

[out]	colorIndex	Storage for the color index
[in]	colorSetName	Name of the color set.

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

MStatus updateSurface

(

)

Search for all occurrences

Signal that this polygonal surface has changed and needs to redraw itself.

Returns:

Status code

Status Codes:

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

MStatus geomChanged

(

)

Search for all occurrences

Reset the geom pointer in the MItMeshFaceVertex.

Returns:

Status code

Status Codes:

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

MStatus setIndex	(	int	faceIndex,
		int	faceVertIndex,
		int &	prevFaceId,
		int &	prevVertId
	)

Search for all occurrences

This method sets the index of the current face vertex to be accessed.

The current face vertex will no longer be in sync with any previous iteration.

Parameters:

[in]	faceIndex	Index of desired face to access.
[in]	faceVertIndex	Face-relative index of desired vertex to access.
[out]	prevFaceId	Index of the face which was current before the change.
[out]	prevVertId	Face-relative index of the vertex which was current before the change.

Returns:

Status code

Status Codes:

• MS::kSuccess The method was successful.
• MS::kFailure An object error has occurred.
• MS::kInvalidParameter Invalid index given.

const char * className

(

)

[static]

Search for all occurrences

Returns the name of this class.

Returns:

The name of this class.