drawing and selection for user defined shapes More...

#include <MPxSurfaceShapeUI.h>

Public Types
enum	UVSelectionType { kSelectMeshUVs, kSelectMeshVerts, kSelectMeshFaces, kSelectMeshEdges }
	Selection modes for UVs. More...

Public Member Functions
	MPxSurfaceShapeUI ()
	Class constructor.

virtual	~MPxSurfaceShapeUI ()
	Class destructor.

void	getDrawData (const void *geom, MDrawData &)
	This method is obsolete. More...

virtual void	getDrawRequests (const MDrawInfo &, bool objectAndActiveOnly, MDrawRequestQueue &requests)
	This method is obsolete. More...

virtual void	draw (const MDrawRequest &, M3dView &view) const
	This method is obsolete. More...

virtual bool	select (MSelectInfo &selectInfo, MSelectionList &selectionList, MPointArray &worldSpaceSelectPts) const
	This routine must be overriden if the shape is to support interactive object and/or component selection. More...

virtual bool	snap (MSelectInfo &snapInfo) const
	Maya calls this method when snapping to the shape's vertices. More...

virtual bool	canDrawUV () const
	Called by Maya to determine if this surface shape supports UV drawing. More...

virtual void	drawUV (M3dView &view, const MTextureEditorDrawInfo &info) const
	This method is called when the surface shape is selected and the texture view is open. More...

virtual bool	selectUV (M3dView &view, UVSelectionType selType, int xmin, int ymin, int xmax, int ymax, bool singleSelect, MSelectionList &selList) const
	This method is called when the user performs a selection within the texture view. More...

MPxSurfaceShape *	surfaceShape () const
	Returns the non-ui shape associated with current instance of this class. More...

MMaterial	material (MDagPath &path) const
	Returns the material associated with this shape. More...

void	materials (MDagPath &path, MObjectArray &componentFilter, MMaterialArray &materials, MObjectArray *componentSet=NULL) const
	Returns a list of materials associated with this shape and a given list of components. More...

Static Public Member Functions
static MPxSurfaceShapeUI *	surfaceShapeUI (const MDagPath &path, MStatus *ReturnStatus=NULL)
	This is a static method that can be used to find the corresponding MPxSurfaceShapeUI for the specified path. More...

static const char *	className ()
	Returns the name of this class. More...

Detailed Description

drawing and selection for user defined shapes

The base class for the UI portion of all user defined shapes.

Examples:: geometryReplicator/geometryReplicator.cpp, and gpuCache/gpuCacheShapeNode.h.

Member Enumeration Documentation

enum UVSelectionType

Selection modes for UVs.

Enumerator
kSelectMeshUVs	The UV selection type is UVs.
kSelectMeshVerts	The UV selection type is vertices.
kSelectMeshFaces	The UV selection type is faces.
kSelectMeshEdges	The UV selection type is edges.

Member Function Documentation

void getDrawData	(	const void *	geom,
		MDrawData &	data
	)

This method is obsolete.

Sets up draw data for the shape.

[as of Maya 2019]

Deprecated:: Please use MHWRender::MPxGeometryOverride, MHWRender::MPxSubSceneOverride, or MHWRender::MPxDrawOverride instead.

The draw data is meant to be a light weight class which can be used to pass geometry data through draw requests.

Parameters

[in]	geom	the geometry necessary to draw the shape
[out]	data	the draw data to be initialized

void getDrawRequests	(	const MDrawInfo &	info,
		bool	objectAndActiveOnly,
		MDrawRequestQueue &	queue
	)

virtual

This method is obsolete.

This routine must be overriden if the shape is to be drawn in the interactive display.

[as of Maya 2019]

Deprecated:: Please use MHWRender::MPxGeometryOverride, MHWRender::MPxSubSceneOverride, or MHWRender::MPxDrawOverride instead.

This function places drawing requests on maya's drawing queue and is called whenever the view is refreshed and the shape needs to be redrawn.

Parameters

[in]	info	Drawing state information.
[in]	objectAndActiveOnly	Used to determine if draw requests for components need to be supplied. If false, some or all components are active and draw requests must be built for all components.
[out]	queue	Queue on which to place the draw request.

void draw	(	const MDrawRequest &	request,
		M3dView &	view
	)		const

virtual

This method is obsolete.

This routine must be overriden if the shape is to be drawn in the interactive display.

[as of Maya 2019]

Deprecated:: Please use MHWRender::MPxGeometryOverride, MHWRender::MPxSubSceneOverride, or MHWRender::MPxDrawOverride instead.

Maya will call this routine with requests that have been previously added to the drawing queue.

Parameters

[in]	request	the drawing request
[in]	view	the interactive 3d view in which to draw

bool select	(	MSelectInfo &	selectInfo,
		MSelectionList &	selectionList,
		MPointArray &	worldSpaceSelectPts
	)		const

virtual

This routine must be overriden if the shape is to support interactive object and/or component selection.

The implementation of this method should call selectInfo.addSelection with information about the selected item and its selection mask. For single click selection, detected using the selectInfo.singleSection() method, the hit point should also be passed as an argument to selectInfo.addSelection.

Parameters

[in]	selectInfo	the Selection state information.
[out]	selectionList	List of items selected by this method. Do not update directly: use MSelectInfo::addSelection instead.
[out]	worldSpaceSelectPts	List of points used to sort corresponding selections in single-select mode. (Closest to camera wins.) Do not update directly: use MSelectInfo::addSelection instead.

Returns

true something was selected
false nothing was selected

bool snap ( MSelectInfo & snapInfo ) const

virtual

Maya calls this method when snapping to the shape's vertices.

If you wish your custom shape to support point snapping then you must override this method and have it call snapInfo's MSelectInfo::setSnapPoint() method to set the point to be snapped to. If setSnapPoint() is called multiple times then the point closest to the cursor will be used.

Parameters

[in] snapInfo the Selection state information.

Returns

true found a vertex to be snapped to
false found no vertex to be snapped to

bool canDrawUV ( ) const

virtual

Called by Maya to determine if this surface shape supports UV drawing.

Returns: true if the shape supports UV drawing, false otherwise.

void drawUV	(	M3dView &	view,
		const MTextureEditorDrawInfo &	info
	)		const

virtual

This method is called when the surface shape is selected and the texture view is open.

Users should override this method if their custom shape supports UVs.

Parameters

[in]	view	Texture view in which to draw UVs.
[in]	info	Drawing parameters.

bool selectUV	(	M3dView &	view,
		MPxSurfaceShapeUI::UVSelectionType	selType,
		int	xmin,
		int	ymin,
		int	xmax,
		int	ymax,
		bool	singleSelect,
		MSelectionList &	selList
	)		const

virtual

This method is called when the user performs a selection within the texture view.

The method is called only when the surface shape is member of the active selection list.

Maya provides the current viewport instance, the type of the selection, the extents of the selection rectangle (in viewport coordinates), and if the selection mode is single selection. The API user is expected to fill the selection list and return a result of true if 'something was selected'.

To properly use this method, you must make sure that you have a valid component type that Maya can recognize. Selection tests can be done using a pick buffer or by spatially determining the selected objects.

Important Currently Maya does not know how to manipulate custom UV components. This method only provides the facilities to visualize what has been selected in the viewport. The API user is responsible for implementing commands that can manipulate the currently selected UVs.

Parameters

[in]	view	the texture drawing view
[in]	selType	the selection type
[in]	xmin	minimum x coordinate value of the selection rectangle.
[in]	ymin	minimum y coordinate value of the selection rectangle.
[in]	xmax	maximum x coordinate value of the selection rectangle.
[in]	ymax	maximum y coordinate value of the selection rectangle.
[in]	singleSelect	indicates if the user is in single selection mode.
[out]	selList	the selection list to be populated.

Returns: true if something was selected, false otherwise.

MPxSurfaceShape * surfaceShape ( ) const

Returns the non-ui shape associated with current instance of this class.

Returns: The non ui shape object

MMaterial material ( MDagPath & path ) const

Returns the material associated with this shape.

The user must supply a DAG path as a shape can have several materials if instanced.

Parameters

[in] path the path for which to get the material

Returns: The material associated with this shape

void materials	(	MDagPath &	path,
		MObjectArray &	componentFilter,
		MMaterialArray &	materials,
		MObjectArray *	componentSet = `NULL`
	)		const

Returns a list of materials associated with this shape and a given list of components.

The user must supply a DAG path as a shape can have several materials if instanced.

Parameters

[in]	path	the path for which to get materials
[in]	componentFilter	the (optional) list of components to iterate over. If the list is empty, it will return materials for all components.
[out]	materials	materials associated with this shape.
[out]	componentSet	optional output for components associated with each returned material. A MObject::kNullObj entry indicates that the corresponding material is associated with the entire shape, not a specific component.

MPxSurfaceShapeUI * surfaceShapeUI	(	const MDagPath &	path,
		MStatus *	ReturnStatus = `NULL`
	)

static

This is a static method that can be used to find the corresponding MPxSurfaceShapeUI for the specified path.

If an MPxSurfaceShapeUI does not exist then one is created.

Important This function can only be used for custom surface shapes and the function will return NULL if the provided path is not a custom surface shape.

Parameters

[in]	path	The full path to a surface shape, including the shape.
[out]	ReturnStatus	The return status. MS::kSuccess The method was successful. MS::kInvalidObjectType The specified object is not a custom surface shape.

Returns: The pointer to an MPxSurfaceShapeUI instance.

const char * className ( )

static

Returns the name of this class.

Returns: The name of this class.

The documentation for this class was generated from the following files:

MPxSurfaceShapeUI.h
MPxSurfaceShapeUI.cpp

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

Member Function Documentation