vtkAreaPicker Class Reference

Picks props behind a selection rectangle on a viewport. More...

#include <vtkAreaPicker.h>

Inheritance diagram for vtkAreaPicker:

Collaboration diagram for vtkAreaPicker:

Public Types
typedef vtkAbstractPropPicker	Superclass
Public Types inherited from vtkAbstractPropPicker
typedef vtkAbstractPicker	Superclass
Public Types inherited from vtkAbstractPicker
typedef vtkObject	Superclass

Public Member Functions
virtual int	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...
vtkAreaPicker *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...
void	SetPickCoords (double x0, double y0, double x1, double y1)
	Set the default screen rectangle to pick in. More...
void	SetRenderer (vtkRenderer *)
	Set the default renderer to pick on. More...
virtual int	Pick ()
	Perform an AreaPick within the default screen rectangle and renderer. More...
virtual int	AreaPick (double x0, double y0, double x1, double y1, vtkRenderer *renderer=NULL)
	Perform pick operation in volume behind the given screen coordinates. More...
virtual int	Pick (double x0, double y0, double vtkNotUsed(z0), vtkRenderer *renderer=NULL)
	Perform pick operation in volume behind the given screen coordinate. More...
vtkProp3DCollection *	GetProp3Ds ()
	Return a collection of all the prop 3D's that were intersected by the pick ray. More...
virtual vtkAbstractMapper3D *	GetMapper ()
	Return mapper that was picked (if any). More...
virtual vtkDataSet *	GetDataSet ()
	Get a pointer to the dataset that was picked (if any). More...
virtual vtkPlanes *	GetFrustum ()
	Return the six planes that define the selection frustum. More...
virtual vtkPoints *	GetClipPoints ()
	Return eight points that define the selection frustum. More...
Public Member Functions inherited from vtkAbstractPropPicker
vtkAbstractPropPicker *	NewInstance () const
virtual vtkProp *	GetViewProp ()
	Return the vtkProp that has been picked. More...
virtual vtkProp3D *	GetProp3D ()
	Return the vtkProp that has been picked. More...
virtual vtkActor *	GetActor ()
	Return the vtkActor that has been picked. More...
virtual vtkActor2D *	GetActor2D ()
	Return the vtkActor2D that has been picked. More...
virtual vtkVolume *	GetVolume ()
	Return the vtkVolume that has been picked. More...
virtual vtkAssembly *	GetAssembly ()
	Return the vtkAssembly that has been picked. More...
virtual vtkPropAssembly *	GetPropAssembly ()
	Return the vtkPropAssembly that has been picked. More...
virtual void	SetPath (vtkAssemblyPath *)
	Return the vtkAssemblyPath that has been picked. More...
virtual vtkAssemblyPath *	GetPath ()
	Return the vtkAssemblyPath that has been picked. More...
Public Member Functions inherited from vtkAbstractPicker
vtkAbstractPicker *	NewInstance () const
virtual int	Pick (double selectionX, double selectionY, double selectionZ, vtkRenderer *renderer)=0
	Perform pick operation with selection point provided. More...
int	Pick (double selectionPt[3], vtkRenderer *ren)
	provided. More...
void	InitializePickList ()
	Initialize list of actors in pick list. More...
void	AddPickList (vtkProp *)
	Add an actor to the pick list. More...
void	DeletePickList (vtkProp *)
	Delete an actor from the pick list. More...
vtkPropCollection *	GetPickList ()
	Return the list of actors in the PickList. More...
virtual vtkRenderer *	GetRenderer ()
	Get the renderer in which pick event occurred. More...
virtual double *	GetSelectionPoint ()
	Get the selection point in screen (pixel) coordinates. More...
virtual void	GetSelectionPoint (double data[3])
	Get the selection point in screen (pixel) coordinates. More...
virtual double *	GetPickPosition ()
	Return position in global coordinates of pick point. More...
virtual void	GetPickPosition (double data[3])
	Return position in global coordinates of pick point. More...
virtual void	SetPickFromList (int)
	Use these methods to control whether to limit the picking to this list (rather than renderer's actors). More...
virtual int	GetPickFromList ()
	Use these methods to control whether to limit the picking to this list (rather than renderer's actors). More...
virtual void	PickFromListOn ()
	Use these methods to control whether to limit the picking to this list (rather than renderer's actors). More...
virtual void	PickFromListOff ()
	Use these methods to control whether to limit the picking to this list (rather than renderer's actors). More...
Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)
virtual void	DebugOn ()
	Turn debugging output on. More...
virtual void	DebugOff ()
	Turn debugging output off. More...
bool	GetDebug ()
	Get the value of the debug flag. More...
void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...
virtual void	Modified ()
	Update the modification time for this object. More...
virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...
void	RemoveObserver (unsigned long tag)
void	RemoveObservers (unsigned long event)
void	RemoveObservers (const char *event)
void	RemoveAllObservers ()
int	HasObserver (unsigned long event)
int	HasObserver (const char *event)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
void	RemoveObservers (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
int	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
int	HasObserver (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method. More...
int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...
int	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...
virtual void	Delete ()
	Delete a VTK object. More...
virtual void	FastDelete ()
	Delete a reference to this object. More...
void	InitializeObjectBase ()
void	Print (ostream &os)
	Print an object to an ostream. More...
virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object). More...
virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object). More...
int	GetReferenceCount ()
	Return the current reference count of this object. More...
void	SetReferenceCount (int)
	Sets the reference count. More...
void	PrintRevisions (ostream &)
	Legacy. More...
virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

Static Public Member Functions
static vtkAreaPicker *	New ()
static int	IsTypeOf (const char *type)
static vtkAreaPicker *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkAbstractPropPicker
static int	IsTypeOf (const char *type)
static vtkAbstractPropPicker *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkAbstractPicker
static int	IsTypeOf (const char *type)
static vtkAbstractPicker *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...
static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...
static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...
static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...
static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...
Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class. More...
static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkAreaPicker ()
	~vtkAreaPicker ()
virtual void	Initialize ()
void	DefineFrustum (double x0, double y0, double x1, double y1, vtkRenderer *)
virtual int	PickProps (vtkRenderer *renderer)
int	TypeDecipher (vtkProp *, vtkAbstractMapper3D **)
int	ABoxFrustumIsect (double bounds[], double &mindist)
Protected Member Functions inherited from vtkAbstractPropPicker
	vtkAbstractPropPicker ()
	~vtkAbstractPropPicker ()
Protected Member Functions inherited from vtkAbstractPicker
	vtkAbstractPicker ()
	~vtkAbstractPicker ()
Protected Member Functions inherited from vtkObject
	vtkObject ()
	~vtkObject () override
void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
	These methods allow a command to exclusively grab all events. More...
void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events. More...
Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()
virtual	~vtkObjectBase ()
virtual void	CollectRevisions (ostream &)
virtual void	ReportReferences (vtkGarbageCollector *)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
vtkPoints *	ClipPoints
vtkPlanes *	Frustum
vtkProp3DCollection *	Prop3Ds
vtkAbstractMapper3D *	Mapper
vtkDataSet *	DataSet
vtkExtractSelectedFrustum *	FrustumExtractor
double	X0
double	Y0
double	X1
double	Y1
Protected Attributes inherited from vtkAbstractPropPicker
vtkAssemblyPath *	Path
Protected Attributes inherited from vtkAbstractPicker
vtkRenderer *	Renderer
double	SelectionPoint [3]
double	PickPosition [3]
int	PickFromList
vtkPropCollection *	PickList
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount
vtkWeakPointerBase **	WeakPointers

Detailed Description

Picks props behind a selection rectangle on a viewport.

The vtkAreaPicker picks all vtkProp3Ds that lie behind the screen space rectangle from x0,y0 and x1,y1. The selection is based upon the bounding box of the prop and is thus not exact.

Like vtkPicker, a pick results in a list of Prop3Ds because many props may lie within the pick frustum. You can also get an AssemblyPath, which in this case is defined to be the path to the one particular prop in the Prop3D list that lies nearest to the near plane.

This picker also returns the selection frustum, defined as either a vtkPlanes, or a set of eight corner vertices in world space. The vtkPlanes version is an ImplicitFunction, which is suitable for use with the vtkExtractGeometry. The six frustum planes are in order: left, right, bottom, top, near, far

Because this picker picks everything within a volume, the world pick point result is ill-defined. Therefore if you ask this class for the world pick position, you will get the centroid of the pick frustum. This may be outside of all props in the prop list.

See also

vtkInteractorStyleRubberBandPick, vtkExtractSelectedFrustum.

Tests:

vtkAreaPicker (Tests)

Definition at line 62 of file vtkAreaPicker.h.

Member Typedef Documentation

typedef vtkAbstractPropPicker vtkAreaPicker::Superclass

Definition at line 66 of file vtkAreaPicker.h.

Constructor & Destructor Documentation

vtkAreaPicker::vtkAreaPicker ( )

protected

vtkAreaPicker::~vtkAreaPicker ( )

protected

Member Function Documentation

static vtkAreaPicker* vtkAreaPicker::New ( )

static

static int vtkAreaPicker::IsTypeOf ( const char *  type )

static

virtual int vtkAreaPicker::IsA ( const char *  name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkAbstractPropPicker.

Reimplemented in vtkRenderedAreaPicker.

static vtkAreaPicker* vtkAreaPicker::SafeDownCast ( vtkObjectBase *  o )

static

virtual vtkObjectBase* vtkAreaPicker::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkAbstractPropPicker.

Reimplemented in vtkRenderedAreaPicker.

vtkAreaPicker* vtkAreaPicker::NewInstance

(

)

const

void vtkAreaPicker::PrintSelf ( ostream &  os, vtkIndent  indent  )

virtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkAbstractPropPicker.

Reimplemented in vtkRenderedAreaPicker.

void vtkAreaPicker::SetPickCoords	(	double	x0,
		double	y0,
		double	x1,
		double	y1
	)

Set the default screen rectangle to pick in.

void vtkAreaPicker::SetRenderer

(

vtkRenderer *

)

Set the default renderer to pick on.

virtual int vtkAreaPicker::Pick ( )

virtual

Perform an AreaPick within the default screen rectangle and renderer.

virtual int vtkAreaPicker::AreaPick ( double  x0, double  y0, double  x1, double  y1, vtkRenderer *  renderer = NULL  )

virtual

Perform pick operation in volume behind the given screen coordinates.

Props intersecting the selection frustum will be accessible via GetProp3D. GetPlanes returns a vtkImplicitFunciton suitable for vtkExtractGeometry.

Reimplemented in vtkRenderedAreaPicker.

virtual int vtkAreaPicker::Pick ( double  x0, double  y0, double   vtkNotUsedz0, vtkRenderer *  renderer = NULL  )

inlinevirtual

Perform pick operation in volume behind the given screen coordinate.

This makes a thin frustum around the selected pixel. Note: this ignores Z in order to pick everying in a volume from z=0 to z=1.

Definition at line 96 of file vtkAreaPicker.h.

virtual vtkAbstractMapper3D* vtkAreaPicker::GetMapper ( )

virtual

Return mapper that was picked (if any).

virtual vtkDataSet* vtkAreaPicker::GetDataSet ( )

virtual

Get a pointer to the dataset that was picked (if any).

If nothing was picked then NULL is returned.

vtkProp3DCollection* vtkAreaPicker::GetProp3Ds ( )

inline

Return a collection of all the prop 3D's that were intersected by the pick ray.

This collection is not sorted.

Definition at line 118 of file vtkAreaPicker.h.

virtual vtkPlanes* vtkAreaPicker::GetFrustum ( )

virtual

Return the six planes that define the selection frustum.

The implicit function defined by the planes evaluates to negative inside and positive outside.

virtual vtkPoints* vtkAreaPicker::GetClipPoints ( )

virtual

Return eight points that define the selection frustum.

virtual void vtkAreaPicker::Initialize ( )

protectedvirtual

Reimplemented from vtkAbstractPropPicker.

void vtkAreaPicker::DefineFrustum ( double  x0, double  y0, double  x1, double  y1, vtkRenderer *    )

protected

virtual int vtkAreaPicker::PickProps ( vtkRenderer *  renderer )

protectedvirtual

int vtkAreaPicker::TypeDecipher ( vtkProp *  , vtkAbstractMapper3D **    )

protected

int vtkAreaPicker::ABoxFrustumIsect ( double  bounds[], double &  mindist  )

protected

Member Data Documentation

vtkPoints* vtkAreaPicker::ClipPoints

protected

Definition at line 148 of file vtkAreaPicker.h.

vtkPlanes* vtkAreaPicker::Frustum

protected

Definition at line 149 of file vtkAreaPicker.h.

vtkProp3DCollection* vtkAreaPicker::Prop3Ds

protected

Definition at line 151 of file vtkAreaPicker.h.

vtkAbstractMapper3D* vtkAreaPicker::Mapper

protected

Definition at line 152 of file vtkAreaPicker.h.

vtkDataSet* vtkAreaPicker::DataSet

protected

Definition at line 153 of file vtkAreaPicker.h.

vtkExtractSelectedFrustum* vtkAreaPicker::FrustumExtractor

protected

Definition at line 156 of file vtkAreaPicker.h.

double vtkAreaPicker::X0

protected

Definition at line 158 of file vtkAreaPicker.h.

double vtkAreaPicker::Y0

protected

Definition at line 159 of file vtkAreaPicker.h.

double vtkAreaPicker::X1

protected

Definition at line 160 of file vtkAreaPicker.h.

double vtkAreaPicker::Y1

protected

Definition at line 161 of file vtkAreaPicker.h.

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

• /home/demarle/Builds/VTK/release/Utilities/Doxygen/dox/Rendering/Core/vtkAreaPicker.h