MPxLocatorNode Class Reference

This reference page is linked to from the following overview topics: Parent class descriptions.

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Detailed Description

Base class for user defined locators.

MPxLocatorNode allows the creation of user-defined locators. A locator is a DAG shaped that is drawn on the screen, but that has is not rendered. Locators are full dependency nodes and can have attributes and a compute method.

To create a locator, derive off of this class and override the draw method. The draw method can be overridden to draw custom geometry using standard OpenGL calls. The other methods of the parent class MPxNode may also be overridden to perform dependency node capabilities as well.

Examples:

curvedArrowsNode.cpp, cvColorNode.cpp, footPrintManip.cpp, footPrintNode.cpp, and swissArmyManip.cpp.

#include <MPxLocatorNode.h>

Inheritance diagram for MPxLocatorNode:

List of all members.

Public Member Functions
	MPxLocatorNode ()
	Constructor
virtual	~MPxLocatorNode ()
	Destructor
virtual MPxNode::Type	type () const
	This method returns the type of the node.
virtual void	draw (M3dView &view, const MDagPath &path, M3dView::DisplayStyle style, M3dView::DisplayStatus)
	Overriding this method allows the drawing of custom geometry using standard OpenGL calls.
virtual bool	isBounded () const
	This method should be overridden to return true if the user supplies a bounding box routine.
virtual MBoundingBox	boundingBox () const
	This method should be overridden to return a bounding box for the locator.
unsigned int	color (M3dView::DisplayStatus displayStatus)
	This method returns the index of the color that is the default draw color for the given display status.
MColor	colorRGB (M3dView::DisplayStatus displayStatus)
	This method returns the RGB values of the default draw color for the given display status.
virtual bool	excludeAsLocator () const
	When the modelPanel is set to not draw locators, returing true will also not draw the custom locator.
virtual bool	isTransparent () const
	Indicates that this locator uses transparency during ::draw method calls.
virtual bool	drawLast () const
	Indicates that this locator should be the last item draw in a given refresh cycle.
Static Public Member Functions
static const char *	className ()
	Returns the name of this class.
Static Public Attributes
static MObject	underWorldObject
	under world attribute Search for all occurrences
static MObject	localPosition
	local position attribute Search for all occurrences
static MObject	localPositionX
	X component of localPosition. Search for all occurrences
static MObject	localPositionY
	Y component of localPosition. Search for all occurrences
static MObject	localPositionZ
	Z component of localPosition. Search for all occurrences
static MObject	worldPosition
	world position attribute Search for all occurrences
static MObject	worldPositionX
	X component of worldPosition. Search for all occurrences
static MObject	worldPositionY
	Y component of worldPosition. Search for all occurrences
static MObject	worldPositionZ
	Z component of worldPosition. Search for all occurrences
static MObject	localScale
	local scale attribute Search for all occurrences
static MObject	localScaleX
	X component of localScale. Search for all occurrences
static MObject	localScaleY
	Y component of localScale. Search for all occurrences
static MObject	localScaleZ
	Z component of localScale. Search for all occurrences
static MObject	nodeBoundingBox
	bounding box attribute Search for all occurrences
static MObject	nodeBoundingBoxMin
	bounding box minimum point Search for all occurrences
static MObject	nodeBoundingBoxMinX
	X component of boundingBoxMin. Search for all occurrences
static MObject	nodeBoundingBoxMinY
	Y component of boundingBoxMin. Search for all occurrences
static MObject	nodeBoundingBoxMinZ
	Z component of boundingBoxMin. Search for all occurrences
static MObject	nodeBoundingBoxMax
	bounding box maximum point Search for all occurrences
static MObject	nodeBoundingBoxMaxX
	X component of boundingBoxMax. Search for all occurrences
static MObject	nodeBoundingBoxMaxY
	Y component of boundingBoxMax. Search for all occurrences
static MObject	nodeBoundingBoxMaxZ
	Z component of boundingBoxMax. Search for all occurrences
static MObject	nodeBoundingBoxSize
	bounding box size vector Search for all occurrences
static MObject	nodeBoundingBoxSizeX
	X component of boundingBoxSize. Search for all occurrences
static MObject	nodeBoundingBoxSizeY
	Y component of boundingBoxSize. Search for all occurrences
static MObject	nodeBoundingBoxSizeZ
	Z component of boundingBoxSize. Search for all occurrences
static MObject	center
	object center attribute Search for all occurrences
static MObject	boundingBoxCenterX
	X component of boundingBoxCenter. Search for all occurrences
static MObject	boundingBoxCenterY
	Y component of boundingBoxCenter. Search for all occurrences
static MObject	boundingBoxCenterZ
	Z component of boundingBoxCenter. Search for all occurrences
static MObject	matrix
	matrix attribute Search for all occurrences
static MObject	inverseMatrix
	inverse matrix attribute Search for all occurrences
static MObject	worldMatrix
	world matrix attribute Search for all occurrences
static MObject	worldInverseMatrix
	inverse world matrix attribute Search for all occurrences
static MObject	parentMatrix
	parent matrix attribute Search for all occurrences
static MObject	parentInverseMatrix
	inverse parent matrix attribute Search for all occurrences
static MObject	visibility
	visibility attribute Search for all occurrences
static MObject	intermediateObject
	intermediate object attribute Search for all occurrences
static MObject	isTemplated
	template attribute Search for all occurrences
static MObject	instObjGroups
	instances object group info attribute Search for all occurrences
static MObject	objectGroups
	object groups attributes Search for all occurrences
static MObject	objectGrpCompList
	component in object groups attribute Search for all occurrences
static MObject	objectGroupId
	group id attribute Search for all occurrences
static MObject	objectGroupColor
	group id attribute Search for all occurrences
static MObject	useObjectColor
	controls choice of wireframe dormant object color Search for all occurrences
static MObject	objectColor
	the per object dormant wireframe color Search for all occurrences

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Constructor & Destructor Documentation

MPxLocatorNode

(

)

Constructor

Class constructor.

~MPxLocatorNode

(

)

[virtual]

Destructor

Class destructor.

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Member Function Documentation

MPxNode::Type type

(

)

const [virtual]

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This method returns the type of the node.

This method should not be overridden by the user. It will return MPxNode::kLocatorNode.

Returns:

The type of node

Status Codes:

• MS::kSuccess The undo was successful
• MS::kFailure This method is not undoable

Reimplemented from MPxNode.

void draw	(	M3dView &	view,
		const MDagPath &	path,
		M3dView::DisplayStyle	style,
		M3dView::DisplayStatus	status
	)		[virtual]

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Overriding this method allows the drawing of custom geometry using standard OpenGL calls.

The OpenGL state should be left in the same state that it was in previously. The OpenGL routine glPushAttrib may be used to make this easier.

When this routine is called, the following conditions may be assumed:

• the correct transform matrix will be loaded for the locator, so the geometry should be drawn in local space
• the correct default color will be set for wire frame drawing given the object's state (eg active, dormant, etc.)
• the object is not invisible or hidden
• if the object has a bounding box, then the bounding box is at least partially in the frustum

As a convenience, this draw method will also be used by OpenGL's selection mechanism to determine whether this object gets selected by a particular mouse event. The user does not need to write a separate selection routine.

Parameters:

[in]	view	3D view that is being drawn into
[in]	path	to this locator in the DAG
[in]	style	style to draw object in
[in]	status	selection status of object

Examples:

curvedArrowsNode.cpp, cvColorNode.cpp, footPrintManip.cpp, footPrintNode.cpp, and swissArmyManip.cpp.

bool isBounded

(

)

const [virtual]

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This method should be overridden to return true if the user supplies a bounding box routine.

Supplying a bounding box routine makes refresh and selection more efficient.

Returns:

A boolean value indicating whether a bounding box routine has been supplied

Examples:

curvedArrowsNode.cpp, cvColorNode.cpp, footPrintManip.cpp, footPrintNode.cpp, and swissArmyManip.cpp.

MBoundingBox boundingBox

(

)

const [virtual]

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This method should be overridden to return a bounding box for the locator.

If this method is overridden, then MPxLocatorNode::isBounded should also be overridden to return true.

Returns:

The bounding box of the locator

Examples:

curvedArrowsNode.cpp, footPrintManip.cpp, footPrintNode.cpp, and swissArmyManip.cpp.

unsigned int color

(

M3dView::DisplayStatus

displayStatus

)

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This method returns the index of the color that is the default draw color for the given display status.

The index should be used with the methods of M3dView. The value is not an index into the OpenGL color table.

The index that is returned will be into the active, dormant, or template color tables depending on the display status passed in.

Parameters:

[in]

displayStatus

display status

Returns:

The index of the color

MColor colorRGB

(

M3dView::DisplayStatus

displayStatus

)

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This method returns the RGB values of the default draw color for the given display status.

Parameters:

[in]

displayStatus

display status

Returns:

The color

bool excludeAsLocator

(

)

const [virtual]

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When the modelPanel is set to not draw locators, returing true will also not draw the custom locator.

If false is returned, the custom locator will also be drawn.

The default return value is true.

Returns:

true if the custom locator should be treated like a standard maya locator.

bool isTransparent

(

)

const [virtual]

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Indicates that this locator uses transparency during ::draw method calls.

Objects with transparency must be drawn in a special queue, i.e. after all opaque objects are drawn.

The default return value is false.

Returns:

true if the locator uses transparency while drawing, false otherwise.

Examples:

curvedArrowsNode.cpp.

bool drawLast

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)

const [virtual]

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Indicates that this locator should be the last item draw in a given refresh cycle.

Objects drawn out-of-order will not preserve the proper transparency sorting. Conflicts among multiple objects with the drawLast indicator set to TRUE will be resolved by their order in the Outliner, where they will be drawn top-to-bottom.

The default return value is false.

Returns:

true, the locator will be drawn after all other objects in the scene.

Examples:

curvedArrowsNode.cpp.

const char * className

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)

[static]

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Returns the name of this class.

Returns:

The name of this class.

Reimplemented from MPxNode.