This class encapsulates all the information needed to fulfill a request to draw an object or part of an object. More...

#include <MDrawRequest.h>

Public Member Functions
	MDrawRequest ()
	Constructor.

	MDrawRequest (const MDrawRequest &in)
	Copy constructor. More...

	~MDrawRequest ()
	Destructor.

M3dView	view () const
	Returns the view where drawing will be done.

void	setView (M3dView &)
	Sets the view where drawing will be done.

const MDagPath	multiPath () const
	Returns the path to the object to be drawn.

void	setMultiPath (const MDagPath &)
	Sets the path to the object to be drawn.

MObject	component () const
	An optional component. More...

void	setComponent (MObject &)
	Set a component to be drawn. More...

MDrawData	drawData () const
	Returns the object specific draw data.

void	setDrawData (MDrawData &)
	Set the object specific draw data. More...

M3dView::DisplayStatus	displayStatus () const
	Return the state of object (active, dormant, etc.).

void	setDisplayStatus (M3dView::DisplayStatus)
	Set the state of object (active, dormant, etc.). More...

bool	displayCulling () const
	Returns the state of the culling flag for the object.

void	setDisplayCulling (bool)
	Sets the state of the culling flag for the object. More...

bool	displayCullOpposite () const
	Returns the state of the culling flag for the object.

void	setDisplayCullOpposite (bool)
	Sets the state of the culling flag for the object. More...

M3dView::DisplayStyle	displayStyle () const
	Returns how the object should be drawn (wireframe, shaded, etc.).

void	setDisplayStyle (M3dView::DisplayStyle)
	Sets how the object should be drawn (wireframe, shaded, etc.). More...

int	color (M3dView::ColorTable table) const
	Returns the wireframe display color. More...

void	setColor (int, M3dView::ColorTable table)
	Sets the wireframe display color. More...

MColor	color () const
	Returns the RGBA wireframe display color. More...

void	setColor (const MColor &color)
	Sets the RGBA wireframe display color. More...

MMaterial	material () const
	Returns the shaded material.

void	setMaterial (MMaterial &)
	Returns the shaded material. More...

bool	isTransparent () const
	Returns the transparency state of the object.

void	setIsTransparent (bool)
	Sets the transparency state of the object. More...

bool	drawLast () const
	Returns the order in which this object will be drawn.

void	setDrawLast (bool)
	Specifies the order in which this object will be drawn. More...

int	token () const
	Returns the user-defined draw token for this request. More...

void	setToken (int)
	Set the user-defined draw token for this request. More...

const MMatrix &	matrix () const
	Returns the draw matrix. More...

void	setMatrix (const MMatrix &)
	Set the draw matrix. More...

MDrawRequest &	operator= (const MDrawRequest &other)
	Assignment operator. More...

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

Detailed Description

This class encapsulates all the information needed to fulfill a request to draw an object or part of an object.

This class is used by the draw methods of MPxSurfaceShapeUI derived objects.

The draw request should be created in the overridden MPxSurfaceShapeUI::getDrawRequests method. Once created the appropriate "set" methods of this class should be used to define what is being requested. Then the request should be placed on the draw reqeust queue using MDrawRequestQueue::add.

When your request gets processed by maya, your overriden MPxSurfaceShape::draw method will get called with your request. Use the query methods of this class to determine what to draw.

You create a draw request using the method MDrawInfo::getPrototype. A draw request automatically picks up certain information (listed below) upon its creation. So you don't have to set any of this information unless you want to change it.

Information automatically set by MDrawInfo::getPrototype :

path path to object to be drawn
view view to draw in
matrix world matrix for object
display appearance how object should be drawn
display status active, dormant etc.

The draw token is an integer value which you can use to specify what is to be drawn. This is object specific and so you should define an enum with the information you require to decide what is being drawn in your MPxSurfaceShapeUI::draw method.

Here is an example of draw token values for a polygonal mesh object as defined in an MPxSurfaceShapeUI derived class.

// Draw Tokens
//
enum {
    kDrawVertices, // component token
    kDrawWireframe,
    kDrawWireframeOnShaded,
    kDrawSmoothShaded,
    kDrawFlatShaded,
    kLastToken
};

This method is obsolete. [from before Maya 2016]

Deprecated:: Use MHWRender::MRenderItem and MHWRender::MPxGeometryOverride instead for Viewport 2.0 support.

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

Constructor & Destructor Documentation

MDrawRequest ( const MDrawRequest & other )

Copy constructor.

Parameters

[in] other value to copy

Member Function Documentation

MObject component ( ) const

An optional component.

If set draw the components that are specified, otherwise draw all components of this type for the object.

void setComponent ( MObject & comp )

Set a component to be drawn.

Parameters

[in] comp component to be drawn

void setDrawData ( MDrawData & data )

Set the object specific draw data.

Parameters

[in] data draw data

Examples:: gpuCache/gpuCacheShapeNode.cpp.

void setDisplayStatus ( M3dView::DisplayStatus status )

Set the state of object (active, dormant, etc.).

Parameters

[in] status display status

void setDisplayCulling ( bool value )

Sets the state of the culling flag for the object.

Parameters

[in] value culling value to be set

void setDisplayCullOpposite ( bool value )

Sets the state of the culling flag for the object.

Parameters

[in] value culling value to be set

void setDisplayStyle ( M3dView::DisplayStyle style )

Sets how the object should be drawn (wireframe, shaded, etc.).

Parameters

[in] style display style to set

Examples:: gpuCache/gpuCacheShapeNode.cpp.

int color ( M3dView::ColorTable table ) const

Returns the wireframe display color.

The color table specifies which of the 4 color planes to use. This table can be active, dormant, template, or background.

Parameters

[in] table color table

void setColor	(	int	value,
		M3dView::ColorTable	table
	)

Sets the wireframe display color.

The color table specifies which of the 4 color planes to use. This table can be active, dormant, template, or background.

Parameters

[in]	value	index into the color table
[in]	table	color table

Examples:: gpuCache/gpuCacheShapeNode.cpp.

MColor color ( ) const

Returns the RGBA wireframe display color.

Returns: The RGBA wireframe color

void setColor ( const MColor & color )

Sets the RGBA wireframe display color.

Parameters

[in] color The RGBA wireframe color

void setMaterial ( MMaterial & material )

Returns the shaded material.

Parameters

[in] material the material to set

Examples:: gpuCache/gpuCacheShapeNode.cpp.

void setIsTransparent ( bool value )

Sets the transparency state of the object.

Parameters

[in] value the transparency value

Examples:: gpuCache/gpuCacheShapeNode.cpp.

void setDrawLast ( bool value )

Specifies the order in which this object will be drawn.

Parameters

[in] value draw last flag

int token ( ) const

Returns the user-defined draw token for this request.

The token is used to identify a particular part of an object to draw. It is also used to distinguish draw requests generated by derived UI objects from those generated by base classes. It some cases, it provides a way of indicating that a component should be displayed without creating a component MObject.

Examples:: gpuCache/gpuCacheShapeNode.cpp.

void setToken ( int value )

Set the user-defined draw token for this request.

The token is used to identify a particular part of an object to draw. It is also used to distinguish draw requests generated by derived UI objects from those generated by base classes. It some cases, it provides a way of indicating that a component should be displayed without creating a component MObject.

Examples:: gpuCache/gpuCacheShapeNode.cpp.

const MMatrix & matrix ( ) const

Returns the draw matrix.

This is typically the world matrix of the object, filled in by MDrawInfo::getPrototype(). Commonly this will be equal to multiPath().inclusiveMatrix() but in some circumstances will be a modified matrix, for example, when animation ghosts are being drawn.

Returns: The matrix associated with this draw request.

void setMatrix ( const MMatrix & value )

Set the draw matrix.

Parameters

[in] value The matrix to set.

MDrawRequest & operator= ( const MDrawRequest & other )

Assignment operator.

Parameters

[in] other MDrawRequest object to copy from.

const char * className ( )

static

Returns the name of this class.

Returns: Name of this class.

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

MDrawRequest.h
MDrawRequest.cpp

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation