implicit function for a selection loop More...

#include <vtkImplicitSelectionLoop.h>

Inheritance diagram for vtkImplicitSelectionLoop:

Collaboration diagram for vtkImplicitSelectionLoop:

Public Member Functions
void	EvaluateGradient (double x[3], double n[3]) override
	Evaluate selection loop returning the gradient. More...

vtkMTimeType	GetMTime () override
	Overload GetMTime() because we depend on the Loop. More...


double	EvaluateFunction (double x[3]) override
	Evaluate selection loop returning a signed distance. More...

double	EvaluateFunction (double x, double y, double z)
	Evaluate selection loop returning a signed distance. More...


virtual void	SetLoop (vtkPoints *)
	Set/Get the array of point coordinates defining the loop. More...

virtual vtkPoints *	GetLoop ()
	Set/Get the array of point coordinates defining the loop. More...


virtual void	SetAutomaticNormalGeneration (int)
	Turn on/off automatic normal generation. More...

virtual int	GetAutomaticNormalGeneration ()
	Turn on/off automatic normal generation. More...

virtual void	AutomaticNormalGenerationOn ()
	Turn on/off automatic normal generation. More...

virtual void	AutomaticNormalGenerationOff ()
	Turn on/off automatic normal generation. More...


virtual void	SetNormal (double, double, double)
	Set / get the normal used to determine whether a point is inside or outside the selection loop. More...

virtual void	SetNormal (double[3])
	Set / get the normal used to determine whether a point is inside or outside the selection loop. More...

virtual double *	GetNormal ()
	Set / get the normal used to determine whether a point is inside or outside the selection loop. More...

virtual void	GetNormal (double data[3])
	Set / get the normal used to determine whether a point is inside or outside the selection loop. More...

Public Member Functions inherited from vtkImplicitFunction
vtkImplicitFunction *	NewInstance () const

double	FunctionValue (const double x[3])
	Evaluate function at position x-y-z and return value. More...

double	FunctionValue (double x, double y, double z)
	Evaluate function at position x-y-z and return value. More...

void	FunctionGradient (const double x[3], double g[3])
	Evaluate function gradient at position x-y-z and pass back vector. More...

double *	FunctionGradient (const double x[3])
	Evaluate function gradient at position x-y-z and pass back vector. More...

double *	FunctionGradient (double x, double y, double z)
	Evaluate function gradient at position x-y-z and pass back vector. More...

virtual void	SetTransform (vtkAbstractTransform *)
	Set/Get a transformation to apply to input points before executing the implicit function. More...

virtual void	SetTransform (const double elements[16])
	Set/Get a transformation to apply to input points before executing the implicit function. More...

virtual vtkAbstractTransform *	GetTransform ()
	Set/Get a transformation to apply to input points before executing the implicit function. More...

double	EvaluateFunction (double x, double y, double z)
	Evaluate function at position x-y-z and return value. 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...

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 vtkImplicitSelectionLoop *	New ()
	Instantiate object with no initial loop. More...

Static Public Member Functions inherited from vtkImplicitFunction
static int	IsTypeOf (const char *type)

static vtkImplicitFunction *	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
	vtkImplicitSelectionLoop ()

	~vtkImplicitSelectionLoop () override

Protected Member Functions inherited from vtkImplicitFunction
	vtkImplicitFunction ()

	~vtkImplicitFunction () override

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 *	Loop

double	Normal [3]

int	AutomaticNormalGeneration

Protected Attributes inherited from vtkImplicitFunction
vtkAbstractTransform *	Transform

double	ReturnValue [3]

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

typedef vtkImplicitFunction	Superclass
	Standard VTK methods for printing and type information. More...

static int	IsTypeOf (const char *type)
	Standard VTK methods for printing and type information. More...

static vtkImplicitSelectionLoop *	SafeDownCast (vtkObjectBase *o)
	Standard VTK methods for printing and type information. More...

virtual int	IsA (const char *type)
	Standard VTK methods for printing and type information. More...

vtkImplicitSelectionLoop *	NewInstance () const
	Standard VTK methods for printing and type information. More...

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard VTK methods for printing and type information. More...

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard VTK methods for printing and type information. More...

Additional Inherited Members
Public Types inherited from vtkImplicitFunction
typedef vtkObject	Superclass

Detailed Description

implicit function for a selection loop

vtkImplicitSelectionLoop computes the implicit function value and function gradient for a irregular, cylinder-like object whose cross section is defined by a set of points forming a loop. The loop need not be convex nor its points coplanar. However, the loop must be non-self-intersecting when projected onto the plane defined by the accumulated cross product around the loop (i.e., the axis of the loop). (Alternatively, you can specify the normal to use.)

The following procedure is used to compute the implicit function value for a point x. Each point of the loop is first projected onto the plane defined by the loop normal. This forms a polygon. Then, to evaluate the implicit function value, inside/outside tests are used to determine if x is inside the polygon, and the distance to the loop boundary is computed (negative values are inside the loop).

One example application of this implicit function class is to draw a loop on the surface of a mesh, and use the loop to clip or extract cells from within the loop. Remember, the selection loop is "infinite" in length, you can use a plane (in boolean combination) to cap the extent of the selection loop. Another trick is to use a connectivity filter to extract the closest region to a given point (i.e., one of the points used to define the selection loop).

See also: vtkImplicitFunction vtkImplicitBoolean vtkExtractGeometry vtkClipPolyData vtkConnectivityFilter vtkPolyDataConnectivityFilter

Tests:: vtkImplicitSelectionLoop (Tests)

Definition at line 60 of file vtkImplicitSelectionLoop.h.

Member Typedef Documentation

typedef vtkImplicitFunction vtkImplicitSelectionLoop::Superclass

Standard VTK methods for printing and type information.

Definition at line 67 of file vtkImplicitSelectionLoop.h.

Constructor & Destructor Documentation

vtkImplicitSelectionLoop::vtkImplicitSelectionLoop ( )

protected

vtkImplicitSelectionLoop::~vtkImplicitSelectionLoop ( )

overrideprotected

Member Function Documentation

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

static

Standard VTK methods for printing and type information.

virtual int vtkImplicitSelectionLoop::IsA ( const char * type )

virtual

Standard VTK methods for printing and type information.

Reimplemented from vtkImplicitFunction.

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

static

Standard VTK methods for printing and type information.

virtual vtkObjectBase* vtkImplicitSelectionLoop::NewInstanceInternal ( ) const

protectedvirtual

Standard VTK methods for printing and type information.

Reimplemented from vtkImplicitFunction.

vtkImplicitSelectionLoop* vtkImplicitSelectionLoop::NewInstance ( ) const

Standard VTK methods for printing and type information.

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

overridevirtual

Standard VTK methods for printing and type information.

Reimplemented from vtkImplicitFunction.

static vtkImplicitSelectionLoop* vtkImplicitSelectionLoop::New ( )

static

Instantiate object with no initial loop.

double vtkImplicitSelectionLoop::EvaluateFunction ( double x[3] )

overridevirtual

Evaluate selection loop returning a signed distance.

Implements vtkImplicitFunction.

double vtkImplicitSelectionLoop::EvaluateFunction	(	double	x,
		double	y,
		double	z
	)

inline

Evaluate selection loop returning a signed distance.

Definition at line 81 of file vtkImplicitSelectionLoop.h.

void vtkImplicitSelectionLoop::EvaluateGradient	(	double	x[3],
		double	n[3]
	)

overridevirtual

Evaluate selection loop returning the gradient.

Implements vtkImplicitFunction.

virtual void vtkImplicitSelectionLoop::SetLoop ( vtkPoints * )

virtual

Set/Get the array of point coordinates defining the loop.

There must be at least three points used to define a loop.

virtual vtkPoints* vtkImplicitSelectionLoop::GetLoop ( )

virtual

Set/Get the array of point coordinates defining the loop.

There must be at least three points used to define a loop.

virtual void vtkImplicitSelectionLoop::SetAutomaticNormalGeneration ( int )

virtual

Turn on/off automatic normal generation.

By default, the normal is computed from the accumulated cross product of the edges. You can also specify the normal to use.

virtual int vtkImplicitSelectionLoop::GetAutomaticNormalGeneration ( )

virtual

Turn on/off automatic normal generation.

By default, the normal is computed from the accumulated cross product of the edges. You can also specify the normal to use.

virtual void vtkImplicitSelectionLoop::AutomaticNormalGenerationOn ( )

virtual

Turn on/off automatic normal generation.

By default, the normal is computed from the accumulated cross product of the edges. You can also specify the normal to use.

virtual void vtkImplicitSelectionLoop::AutomaticNormalGenerationOff ( )

virtual

Turn on/off automatic normal generation.

By default, the normal is computed from the accumulated cross product of the edges. You can also specify the normal to use.

virtual void vtkImplicitSelectionLoop::SetNormal	(	double	,
		double	,
		double
	)

virtual

Set / get the normal used to determine whether a point is inside or outside the selection loop.

virtual void vtkImplicitSelectionLoop::SetNormal ( double [3] )

virtual

Set / get the normal used to determine whether a point is inside or outside the selection loop.

virtual double* vtkImplicitSelectionLoop::GetNormal ( )

virtual

Set / get the normal used to determine whether a point is inside or outside the selection loop.

virtual void vtkImplicitSelectionLoop::GetNormal ( double data[3] )

virtual

Set / get the normal used to determine whether a point is inside or outside the selection loop.

vtkMTimeType vtkImplicitSelectionLoop::GetMTime ( )

overridevirtual

Overload GetMTime() because we depend on the Loop.

Reimplemented from vtkImplicitFunction.

Member Data Documentation

vtkPoints* vtkImplicitSelectionLoop::Loop

protected

Definition at line 128 of file vtkImplicitSelectionLoop.h.

double vtkImplicitSelectionLoop::Normal[3]

protected

Definition at line 129 of file vtkImplicitSelectionLoop.h.

int vtkImplicitSelectionLoop::AutomaticNormalGeneration

protected

Definition at line 130 of file vtkImplicitSelectionLoop.h.

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

/home/demarle/Builds/VTK/release/Utilities/Doxygen/dox/Common/DataModel/vtkImplicitSelectionLoop.h

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation