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vtkImplicitSelectionLoop Class Reference

implicit function for a selection loop More...

#include <vtkImplicitSelectionLoop.h>

Inheritance diagram for vtkImplicitSelectionLoop:
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Collaboration diagram for vtkImplicitSelectionLoop:
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Public Types

typedef vtkImplicitFunction Superclass
 Standard VTK methods for printing and type information. More...
 
- Public Types inherited from vtkImplicitFunction
typedef vtkObject Superclass
 

Public Member Functions

virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkImplicitSelectionLoopNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
double EvaluateFunction (double x[3]) override
 Evaluate function at position x-y-z and return value. More...
 
void EvaluateGradient (double x[3], double n[3]) override
 Evaluate selection loop returning the gradient. More...
 
virtual void SetLoop (vtkPoints *)
 Set/Get the array of point coordinates defining the loop. More...
 
virtual vtkPointsGetLoop ()
 
virtual void SetAutomaticNormalGeneration (vtkTypeBool)
 Turn on/off automatic normal generation. More...
 
virtual vtkTypeBool GetAutomaticNormalGeneration ()
 
virtual void AutomaticNormalGenerationOn ()
 
virtual void AutomaticNormalGenerationOff ()
 
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])
 
virtual doubleGetNormal ()
 
virtual void GetNormal (double data[3])
 
vtkMTimeType GetMTime () override
 Overload GetMTime() because we depend on the Loop. More...
 
virtual double EvaluateFunction (double x[3])=0
 Evaluate selection loop returning a signed distance. More...
 
virtual void EvaluateFunction (vtkDataArray *input, vtkDataArray *output)
 Evaluate selection loop returning a signed distance. More...
 
virtual double EvaluateFunction (double x, double y, double z)
 Evaluate selection loop returning a signed distance. More...
 
- Public Member Functions inherited from vtkImplicitFunction
vtkImplicitFunctionNewInstance () const
 
virtual void FunctionValue (vtkDataArray *input, vtkDataArray *output)
 Evaluate function at position x-y-z and return value. More...
 
double FunctionValue (const double x[3])
 
double FunctionValue (double x, double y, double z)
 
void FunctionGradient (const double x[3], double g[3])
 Evaluate function gradient at position x-y-z and pass back vector. More...
 
doubleFunctionGradient (const double x[3])
 
doubleFunctionGradient (double x, double y, double z)
 
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])
 
virtual vtkAbstractTransformGetTransform ()
 
virtual void EvaluateFunction (vtkDataArray *input, vtkDataArray *output)
 
virtual double EvaluateFunction (double x, double y, double z)
 
- 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...
 
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)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
vtkTypeBool HasObserver (unsigned long event)
 
vtkTypeBool HasObserver (const char *event)
 
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)
 
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)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- 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 PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
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...
 

Static Public Member Functions

static vtkTypeBool IsTypeOf (const char *type)
 
static vtkImplicitSelectionLoopSafeDownCast (vtkObjectBase *o)
 
static vtkImplicitSelectionLoopNew ()
 Instantiate object with no initial loop. More...
 
- Static Public Member Functions inherited from vtkImplicitFunction
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkImplicitFunctionSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 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 ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- 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 vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 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=nullptr)
 These methods allow a command to exclusively grab all events. More...
 
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

vtkPointsLoop
 
double Normal [3]
 
vtkTypeBool AutomaticNormalGeneration
 
- Protected Attributes inherited from vtkImplicitFunction
vtkAbstractTransformTransform
 
double ReturnValue [3]
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32 ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

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

◆ Superclass

Standard VTK methods for printing and type information.

Definition at line 67 of file vtkImplicitSelectionLoop.h.

Constructor & Destructor Documentation

◆ vtkImplicitSelectionLoop()

vtkImplicitSelectionLoop::vtkImplicitSelectionLoop ( )
protected

◆ ~vtkImplicitSelectionLoop()

vtkImplicitSelectionLoop::~vtkImplicitSelectionLoop ( )
overrideprotected

Member Function Documentation

◆ IsTypeOf()

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

◆ IsA()

virtual vtkTypeBool vtkImplicitSelectionLoop::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 vtkImplicitFunction.

◆ SafeDownCast()

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

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkImplicitSelectionLoop::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkImplicitFunction.

◆ NewInstance()

vtkImplicitSelectionLoop* vtkImplicitSelectionLoop::NewInstance ( ) const

◆ PrintSelf()

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

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 vtkImplicitFunction.

◆ New()

static vtkImplicitSelectionLoop* vtkImplicitSelectionLoop::New ( )
static

Instantiate object with no initial loop.

◆ EvaluateFunction() [1/4]

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

Evaluate function at position x-y-z and return value.

You should generally not call this method directly, you should use FunctionValue() instead. This method must be implemented by any derived class.

Implements vtkImplicitFunction.

◆ EvaluateGradient()

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

Evaluate selection loop returning the gradient.

Implements vtkImplicitFunction.

◆ SetLoop()

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.

◆ GetLoop()

virtual vtkPoints* vtkImplicitSelectionLoop::GetLoop ( )
virtual

◆ SetAutomaticNormalGeneration()

virtual void vtkImplicitSelectionLoop::SetAutomaticNormalGeneration ( vtkTypeBool  )
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.

◆ GetAutomaticNormalGeneration()

virtual vtkTypeBool vtkImplicitSelectionLoop::GetAutomaticNormalGeneration ( )
virtual

◆ AutomaticNormalGenerationOn()

virtual void vtkImplicitSelectionLoop::AutomaticNormalGenerationOn ( )
virtual

◆ AutomaticNormalGenerationOff()

virtual void vtkImplicitSelectionLoop::AutomaticNormalGenerationOff ( )
virtual

◆ SetNormal() [1/2]

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.

◆ SetNormal() [2/2]

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

◆ GetNormal() [1/2]

virtual double* vtkImplicitSelectionLoop::GetNormal ( )
virtual

◆ GetNormal() [2/2]

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

◆ GetMTime()

vtkMTimeType vtkImplicitSelectionLoop::GetMTime ( )
overridevirtual

Overload GetMTime() because we depend on the Loop.

Reimplemented from vtkImplicitFunction.

◆ EvaluateFunction() [2/4]

virtual double vtkImplicitFunction::EvaluateFunction

Evaluate selection loop returning a signed distance.

◆ EvaluateFunction() [3/4]

virtual void vtkImplicitFunction::EvaluateFunction

Evaluate selection loop returning a signed distance.

◆ EvaluateFunction() [4/4]

virtual double vtkImplicitFunction::EvaluateFunction
inline

Evaluate selection loop returning a signed distance.

Definition at line 115 of file vtkImplicitFunction.h.

Member Data Documentation

◆ Loop

vtkPoints* vtkImplicitSelectionLoop::Loop
protected

Definition at line 127 of file vtkImplicitSelectionLoop.h.

◆ Normal

double vtkImplicitSelectionLoop::Normal[3]
protected

Definition at line 128 of file vtkImplicitSelectionLoop.h.

◆ AutomaticNormalGeneration

vtkTypeBool vtkImplicitSelectionLoop::AutomaticNormalGeneration
protected

Definition at line 129 of file vtkImplicitSelectionLoop.h.


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