a cell that represents an n-sided polygon More...

#include <vtkPolygon.h>

Inheritance diagram for vtkPolygon:

Collaboration diagram for vtkPolygon:

Public Types
typedef vtkCell	Superclass

Public Types inherited from vtkCell
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...

vtkPolygon *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

double	ComputeArea ()
	Compute the area of a polygon. More...

void	InterpolateFunctions (double x[3], double *sf) override
	Compute the interpolation functions/derivatives. More...

bool	IsConvex ()
	Determine whether or not a polygon is convex. More...

int	ParameterizePolygon (double p0[3], double p10[3], double &l10, double p20[3], double &l20, double n[3])
	Create a local s-t coordinate system for a polygon. More...

int	Triangulate (vtkIdList *outTris)
	Triangulate this polygon. More...

int	NonDegenerateTriangulate (vtkIdList *outTris)
	Same as Triangulate(vtkIdList *outTris) but with a first pass to split the polygon into non-degenerate polygons. More...


int	GetCellType () override
	See the vtkCell API for descriptions of these methods. More...

int	GetCellDimension () override
	See the vtkCell API for descriptions of these methods. More...

int	GetNumberOfEdges () override
	See the vtkCell API for descriptions of these methods. More...

int	GetNumberOfFaces () override
	See the vtkCell API for descriptions of these methods. More...

vtkCell *	GetEdge (int edgeId) override
	See the vtkCell API for descriptions of these methods. More...

vtkCell *	GetFace (int) override
	See the vtkCell API for descriptions of these methods. More...

int	CellBoundary (int subId, double pcoords[3], vtkIdList *pts) override
	See the vtkCell API for descriptions of these methods. More...

void	Contour (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray verts, vtkCellArray lines, vtkCellArray polys, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData *outCd) override
	See the vtkCell API for descriptions of these methods. More...

void	Clip (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray tris, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData *outCd, int insideOut) override
	See the vtkCell API for descriptions of these methods. More...

int	EvaluatePosition (double x[3], double closestPoint, int &subId, double pcoords[3], double &dist2, double weights) override
	See the vtkCell API for descriptions of these methods. More...

void	EvaluateLocation (int &subId, double pcoords[3], double x[3], double *weights) override
	See the vtkCell API for descriptions of these methods. More...

int	IntersectWithLine (double p1[3], double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId) override
	See the vtkCell API for descriptions of these methods. More...

int	Triangulate (int index, vtkIdList ptIds, vtkPoints pts) override
	See the vtkCell API for descriptions of these methods. More...

void	Derivatives (int subId, double pcoords[3], double values, int dim, double derivs) override
	See the vtkCell API for descriptions of these methods. More...

int	IsPrimaryCell () override
	See the vtkCell API for descriptions of these methods. More...


virtual bool	GetUseMVCInterpolation ()
	Set/Get the flag indicating whether to use Mean Value Coordinate for the interpolation. More...

virtual void	SetUseMVCInterpolation (bool)
	Set/Get the flag indicating whether to use Mean Value Coordinate for the interpolation. More...

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

void	Initialize (int npts, vtkIdType pts, vtkPoints p)
	Initialize cell from outside with point ids and point coordinates specified. More...

virtual void	ShallowCopy (vtkCell *c)
	Copy this cell by reference counting the internal data structures. More...

virtual void	DeepCopy (vtkCell *c)
	Copy this cell by completely copying internal data structures. More...

virtual int	IsLinear ()
	Non-linear cells require special treatment beyond the usual cell type and connectivity list information. More...

virtual int	RequiresInitialization ()
	Some cells require initialization prior to access. More...

virtual void	Initialize ()

virtual int	IsExplicitCell ()
	Explicit cells require additional representational information beyond the usual cell type and connectivity list information. More...

virtual int	RequiresExplicitFaceRepresentation ()
	Determine whether the cell requires explicit face representation, and methods for setting and getting the faces (see vtkPolyhedron for example usage of these methods). More...

virtual void	SetFaces (vtkIdType *vtkNotUsed(faces))

virtual vtkIdType *	GetFaces ()

vtkPoints *	GetPoints ()
	Get the point coordinates for the cell. More...

vtkIdType	GetNumberOfPoints ()
	Return the number of points in the cell. More...

vtkIdList *	GetPointIds ()
	Return the list of point ids defining the cell. More...

vtkIdType	GetPointId (int ptId)
	For cell point i, return the actual point id. More...

void	GetBounds (double bounds[6])
	Compute cell bounding box (xmin,xmax,ymin,ymax,zmin,zmax). More...

double *	GetBounds ()
	Compute cell bounding box (xmin,xmax,ymin,ymax,zmin,zmax). More...

double	GetLength2 ()
	Compute Length squared of cell (i.e., bounding box diagonal squared). More...

virtual int	GetParametricCenter (double pcoords[3])
	Return center of the cell in parametric coordinates. More...

virtual double	GetParametricDistance (double pcoords[3])
	Return the distance of the parametric coordinate provided to the cell. More...

virtual double *	GetParametricCoords ()
	Return a contiguous array of parametric coordinates of the points defining this cell. More...

virtual void	InterpolateFunctions (double vtkNotUsed(pcoords)[3], double *vtkNotUsed(weight))
	Compute the interpolation functions/derivatives (aka shape functions/derivatives) No-ops at this level. More...

virtual void	InterpolateDerivs (double vtkNotUsed(pcoords)[3], double *vtkNotUsed(derivs))

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 vtkPolygon *	New ()

static int	IsTypeOf (const char *type)

static vtkPolygon *	SafeDownCast (vtkObjectBase *o)

static void	ComputeNormal (int numPts, double *pts, double n[3])
	Compute the polygon normal from an array of points. More...

static double	ComputeArea (vtkPoints p, vtkIdType numPts, vtkIdType pts, double normal[3])
	Compute the area of a polygon in 3D. More...

static int	PointInPolygon (double x[3], int numPts, double *pts, double bounds[6], double n[3])
	Determine whether point is inside polygon. More...

static double	DistanceToPolygon (double x[3], int numPts, double *pts, double bounds[6], double closest[3])
	Compute the distance of a point to a polygon. More...

static int	IntersectPolygonWithPolygon (int npts, double pts, double bounds[6], int npts2, double pts2, double bounds2[3], double tol, double x[3])
	Method intersects two polygons. More...

static int	IntersectConvex2DCells (vtkCell cell1, vtkCell cell2, double tol, double p0[3], double p1[3])
	Intersect two convex 2D polygons to produce a line segment as output. More...


static void	ComputeNormal (vtkPoints p, int numPts, vtkIdType pts, double n[3])
	Computes the unit normal to the polygon. More...

static void	ComputeNormal (vtkPoints *p, double n[3])
	Computes the unit normal to the polygon. More...

static void	ComputeNormal (vtkIdTypeArray ids, vtkPoints pts, double n[3])
	Computes the unit normal to the polygon. More...


static bool	IsConvex (vtkPoints p, int numPts, vtkIdType pts)
	Determine whether or not a polygon is convex. More...

static bool	IsConvex (vtkIdTypeArray ids, vtkPoints p)
	Determine whether or not a polygon is convex. More...

static bool	IsConvex (vtkPoints *p)
	Determine whether or not a polygon is convex. More...


static bool	ComputeCentroid (vtkPoints p, int numPts, vtkIdType pts, double centroid[3])
	Compute the centroid of a set of points. More...

static bool	ComputeCentroid (vtkIdTypeArray ids, vtkPoints pts, double centroid[3])
	Compute the centroid of a set of points. More...

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

static vtkCell *	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

	vtkPolygon ()

	~vtkPolygon () override

void	InterpolateFunctionsUsingMVC (double x[3], double *weights)

int	EarCutTriangulation ()
	A fast triangulation method. More...

Protected Member Functions inherited from vtkCell
	vtkCell ()

	~vtkCell () 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
double	Tolerance

int	SuccessfulTriangulation

double	Normal [3]

vtkIdList *	Tris

vtkTriangle *	Triangle

vtkQuad *	Quad

vtkDoubleArray *	TriScalars

vtkLine *	Line

bool	UseMVCInterpolation

Protected Attributes inherited from vtkCell
double	Bounds [6]

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkCell
vtkPoints *	Points

vtkIdList *	PointIds

Detailed Description

a cell that represents an n-sided polygon

vtkPolygon is a concrete implementation of vtkCell to represent a 2D n-sided polygon. The polygons cannot have any internal holes, and cannot self-intersect. Define the polygon with n-points ordered in the counter- clockwise direction; do not repeat the last point.

Examples:: vtkPolygon (Examples)

Tests:: vtkPolygon (Tests)

Definition at line 45 of file vtkPolygon.h.

Member Typedef Documentation

typedef vtkCell vtkPolygon::Superclass

Definition at line 49 of file vtkPolygon.h.

Constructor & Destructor Documentation

vtkPolygon::vtkPolygon ( )

protected

vtkPolygon::~vtkPolygon ( )

overrideprotected

Member Function Documentation

static vtkPolygon* vtkPolygon::New ( )

static

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

static

virtual int vtkPolygon::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 vtkCell.

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

static

virtual vtkObjectBase* vtkPolygon::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkCell.

vtkPolygon* vtkPolygon::NewInstance ( ) const

void vtkPolygon::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 vtkCell.

int vtkPolygon::GetCellType ( )

inlineoverridevirtual