vtkPicker Class Reference

superclass for 3D geometric pickers (uses ray cast) More...

#include <vtkPicker.h>

Inheritance diagram for vtkPicker:

Collaboration diagram for vtkPicker:

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

Public Member Functions
virtual int	IsA (const char *type)
vtkPicker *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
vtkActorCollection *	GetActors ()
virtual void	SetTolerance (double)
virtual double	GetTolerance ()
virtual double *	GetMapperPosition ()
virtual void	GetMapperPosition (double data[3])
virtual vtkAbstractMapper3D *	GetMapper ()
virtual vtkDataSet *	GetDataSet ()
vtkProp3DCollection *	GetProp3Ds ()
vtkPoints *	GetPickedPositions ()
virtual int	Pick (double selectionX, double selectionY, double selectionZ, vtkRenderer *renderer)
int	Pick (double selectionPt[3], vtkRenderer *ren)
Public Member Functions inherited from vtkAbstractPropPicker
vtkAbstractPropPicker *	NewInstance () const
virtual vtkProp *	GetViewProp ()
virtual vtkProp3D *	GetProp3D ()
virtual vtkActor *	GetActor ()
virtual vtkActor2D *	GetActor2D ()
virtual vtkVolume *	GetVolume ()
virtual vtkAssembly *	GetAssembly ()
virtual vtkPropAssembly *	GetPropAssembly ()
virtual void	SetPath (vtkAssemblyPath *)
virtual vtkAssemblyPath *	GetPath ()
Public Member Functions inherited from vtkAbstractPicker
vtkAbstractPicker *	NewInstance () const
void	InitializePickList ()
void	AddPickList (vtkProp *)
void	DeletePickList (vtkProp *)
vtkPropCollection *	GetPickList ()
virtual vtkRenderer *	GetRenderer ()
virtual double *	GetSelectionPoint ()
virtual void	GetSelectionPoint (double data[3])
virtual double *	GetPickPosition ()
virtual void	GetPickPosition (double data[3])
int	Pick (double selectionPt[3], vtkRenderer *ren)
virtual void	SetPickFromList (int)
virtual int	GetPickFromList ()
virtual void	PickFromListOn ()
virtual void	PickFromListOff ()
Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const
virtual void	DebugOn ()
virtual void	DebugOff ()
bool	GetDebug ()
void	SetDebug (bool debugFlag)
virtual void	Modified ()
virtual unsigned long	GetMTime ()
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
vtkCommand *	GetCommand (unsigned long tag)
void	RemoveObserver (vtkCommand *)
void	RemoveObservers (unsigned long event, vtkCommand *)
void	RemoveObservers (const char *event, vtkCommand *)
int	HasObserver (unsigned long event, vtkCommand *)
int	HasObserver (const char *event, vtkCommand *)
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)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
int	InvokeEvent (unsigned long event, void *callData)
int	InvokeEvent (const char *event, void *callData)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
virtual void	Delete ()
virtual void	FastDelete ()
void	Print (ostream &os)
virtual void	Register (vtkObjectBase *o)
virtual void	UnRegister (vtkObjectBase *o)
void	SetReferenceCount (int)
void	PrintRevisions (ostream &)
virtual void	PrintHeader (ostream &os, vtkIndent indent)
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
int	GetReferenceCount ()

Static Public Member Functions
static vtkPicker *	New ()
static int	IsTypeOf (const char *type)
static vtkPicker *	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 int	IsTypeOf (const char *type)
static vtkObject *	SafeDownCast (vtkObjectBase *o)
static vtkObject *	New ()
static void	BreakOnError ()
static void	SetGlobalWarningDisplay (int val)
static void	GlobalWarningDisplayOn ()
static void	GlobalWarningDisplayOff ()
static int	GetGlobalWarningDisplay ()
Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)
static vtkObjectBase *	New ()

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkPicker ()
	~vtkPicker ()
void	MarkPicked (vtkAssemblyPath *path, vtkProp3D *p, vtkAbstractMapper3D *m, double tMin, double mapperPos[3])
virtual double	IntersectWithLine (double p1[3], double p2[3], double tol, vtkAssemblyPath *path, vtkProp3D *p, vtkAbstractMapper3D *m)
virtual void	Initialize ()
Protected Member Functions inherited from vtkAbstractPropPicker
	vtkAbstractPropPicker ()
	~vtkAbstractPropPicker ()
Protected Member Functions inherited from vtkAbstractPicker
	vtkAbstractPicker ()
	~vtkAbstractPicker ()
Protected Member Functions inherited from vtkObject
	vtkObject ()
virtual	~vtkObject ()
virtual void	RegisterInternal (vtkObjectBase *, int check)
virtual void	UnRegisterInternal (vtkObjectBase *, int check)
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
void	InternalReleaseFocus ()
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
double	Tolerance
double	MapperPosition [3]
vtkAbstractMapper3D *	Mapper
vtkDataSet *	DataSet
double	GlobalTMin
vtkTransform *	Transform
vtkActorCollection *	Actors
vtkProp3DCollection *	Prop3Ds
vtkPoints *	PickedPositions
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

superclass for 3D geometric pickers (uses ray cast)

vtkPicker is used to select instances of vtkProp3D by shooting a ray into a graphics window and intersecting with the actor's bounding box. The ray is defined from a point defined in window (or pixel) coordinates, and a point located from the camera's position.

vtkPicker may return more than one vtkProp3D, since more than one bounding box may be intersected. vtkPicker returns an unsorted list of props that were hit, and a list of the corresponding world points of the hits. For the vtkProp3D that is closest to the camera, vtkPicker returns the pick coordinates in world and untransformed mapper space, the prop itself, the data set, and the mapper. For vtkPicker the closest prop is the one whose center point (i.e., center of bounding box) projected on the view ray is closest to the camera. Subclasses of vtkPicker use other methods for computing the pick point.

See also

vtkPicker is used for quick geometric picking. If you desire more precise picking of points or cells based on the geometry of any vtkProp3D, use the subclasses vtkPointPicker or vtkCellPicker. For hardware-accelerated picking of any type of vtkProp, use vtkPropPicker or vtkWorldPointPicker.

Events:

vtkCommand::PickEvent vtkCommand::EndPickEvent vtkCommand::StartPickEvent

Tests:

vtkPicker (Tests)

Definition at line 59 of file vtkPicker.h.

Member Typedef Documentation

typedef vtkAbstractPropPicker vtkPicker::Superclass

Definition at line 63 of file vtkPicker.h.

Constructor & Destructor Documentation

vtkPicker::vtkPicker ( )

protected

vtkPicker::~vtkPicker ( )

protected

Member Function Documentation

static vtkPicker* vtkPicker::New ( )

static

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

static

virtual int vtkPicker::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 vtkCellPicker, vtkResliceCursorPicker, vtkVolumePicker, and vtkPointPicker.

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

static

virtual vtkObjectBase* vtkPicker::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkAbstractPropPicker.

Reimplemented in vtkCellPicker, vtkResliceCursorPicker, vtkVolumePicker, and vtkPointPicker.

vtkPicker* vtkPicker::NewInstance

(

)

const

void vtkPicker::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 vtkVolumePicker, and vtkPointPicker.

virtual void vtkPicker::SetTolerance ( double  )

virtual

Specify tolerance for performing pick operation. Tolerance is specified as fraction of rendering window size. (Rendering window size is measured across diagonal.)

virtual double vtkPicker::GetTolerance ( )

virtual

Specify tolerance for performing pick operation. Tolerance is specified as fraction of rendering window size. (Rendering window size is measured across diagonal.)

virtual double* vtkPicker::GetMapperPosition ( )

virtual

Return position in mapper (i.e., non-transformed) coordinates of pick point.

virtual void vtkPicker::GetMapperPosition ( double  data[3] )

virtual

Return position in mapper (i.e., non-transformed) coordinates of pick point.

virtual vtkAbstractMapper3D* vtkPicker::GetMapper ( )

virtual

Return mapper that was picked (if any).

virtual vtkDataSet* vtkPicker::GetDataSet ( )

virtual

Get a pointer to the dataset that was picked (if any). If nothing was picked then NULL is returned.

vtkProp3DCollection* vtkPicker::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 94 of file vtkPicker.h.

vtkActorCollection* vtkPicker::GetActors

(

)

Return a collection of all the actors that were intersected. This collection is not sorted. (This is a convenience method to maintain backward compatibility.)

vtkPoints* vtkPicker::GetPickedPositions ( )

inline

Return a list of the points the the actors returned by GetProp3Ds were intersected at. The order of this list will match the order of GetProp3Ds.

Definition at line 107 of file vtkPicker.h.

virtual int vtkPicker::Pick ( double  selectionX, double  selectionY, double  selectionZ, vtkRenderer *  renderer  )

virtual

Perform pick operation with selection point provided. Normally the first two values for the selection point are x-y pixel coordinate, and the third value is =0. Return non-zero if something was successfully picked.

Implements vtkAbstractPicker.

Reimplemented in vtkCellPicker, and vtkResliceCursorPicker.

int vtkPicker::Pick ( double  selectionPt[3], vtkRenderer *  ren  )

inline

Perform pick operation with selection point provided. Normally the first two values for the selection point are x-y pixel coordinate, and the third value is =0. Return non-zero if something was successfully picked.

Definition at line 125 of file vtkPicker.h.

void vtkPicker::MarkPicked ( vtkAssemblyPath *  path, vtkProp3D *  p, vtkAbstractMapper3D *  m, double  tMin, double  mapperPos[3]  )

protected

virtual double vtkPicker::IntersectWithLine ( double  p1[3], double  p2[3], double  tol, vtkAssemblyPath *  path, vtkProp3D *  p, vtkAbstractMapper3D *  m  )

protectedvirtual

Reimplemented in vtkCellPicker, and vtkPointPicker.

virtual void vtkPicker::Initialize ( )

protectedvirtual

Reimplemented from vtkAbstractPropPicker.

Reimplemented in vtkCellPicker, and vtkPointPicker.

Member Data Documentation

double vtkPicker::Tolerance

protected

Definition at line 140 of file vtkPicker.h.

double vtkPicker::MapperPosition[3]

protected

Definition at line 141 of file vtkPicker.h.

vtkAbstractMapper3D* vtkPicker::Mapper

protected

Definition at line 143 of file vtkPicker.h.

vtkDataSet* vtkPicker::DataSet

protected

Definition at line 144 of file vtkPicker.h.

double vtkPicker::GlobalTMin

protected

Definition at line 146 of file vtkPicker.h.

vtkTransform* vtkPicker::Transform

protected

Definition at line 147 of file vtkPicker.h.

vtkActorCollection* vtkPicker::Actors

protected

Definition at line 148 of file vtkPicker.h.

vtkProp3DCollection* vtkPicker::Prop3Ds

protected

Definition at line 149 of file vtkPicker.h.

vtkPoints* vtkPicker::PickedPositions

protected

Definition at line 150 of file vtkPicker.h.

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

• dox/Rendering/Core/vtkPicker.h