---

vtkCutter Class Reference

Cut vtkDataSet with user-specified implicit function. More...

#include <vtkCutter.h>

Inheritance diagram for vtkCutter:

[legend]Collaboration diagram for vtkCutter:

[legend]List of all members.

Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
unsigned long	GetMTime ()
void	CreateDefaultLocator ()
void	SetValue (int i, float value)
float	GetValue (int i)
float *	GetValues ()
void	GetValues (float *contourValues)
void	SetNumberOfContours (int number)
int	GetNumberOfContours ()
void	GenerateValues (int numContours, float range[2])
void	GenerateValues (int numContours, float rangeStart, float rangeEnd)
virtual void	SetCutFunction (vtkImplicitFunction *)
virtual vtkImplicitFunction *	GetCutFunction ()
virtual void	SetGenerateCutScalars (int)
virtual int	GetGenerateCutScalars ()
virtual void	GenerateCutScalarsOn ()
virtual void	GenerateCutScalarsOff ()
void	SetLocator (vtkPointLocator *locator)
virtual vtkPointLocator *	GetLocator ()
virtual void	SetSortBy (int)
virtual int	GetSortBy ()
void	SetSortByToSortByValue ()
void	SetSortByToSortByCell ()
const char *	GetSortByAsString ()
Static Public Methods
int	IsTypeOf (const char *type)
vtkCutter *	SafeDownCast (vtkObject *o)
vtkCutter *	New ()
Protected Methods
	vtkCutter (vtkImplicitFunction *cf=NULL)
	~vtkCutter ()
void	Execute ()
Protected Attributes
vtkImplicitFunction *	CutFunction
vtkPointLocator *	Locator
int	SortBy
vtkContourValues *	ContourValues
int	GenerateCutScalars

---

Detailed Description

Cut vtkDataSet with user-specified implicit function.

Date:

2001/10/11 13:36:53

Revision:

1.52

vtkCutter is a filter to cut through data using any subclass of vtkImplicitFunction. That is, a polygonal surface is created corresponding to the implicit function F(x,y,z) = value(s), where you can specify one or more values used to cut with.

In VTK, cutting means reducing a cell of dimension N to a cut surface of dimension N-1. For example, a tetrahedron when cut by a plane (i.e., vtkPlane implicit function) will generate triangles. (Clipping takes a N dimensional cell and creates N dimension primitives.)

vtkCutter is generally used to "slice-through" a dataset, generating a surface that can be visualized. It is also possible to use vtkCutter to do a form of volume rendering. vtkCutter does this by generating multiple cut surfaces (usually planes) which are ordered (and rendered) from back-to-front. The surfaces are set translucent to give a volumetric rendering effect.

See also:

vtkImplicitFunction vtkClipPolyData

Examples:

vtkCutter (Examples)

Tests:

vtkCutter (Tests)

Definition at line 83 of file vtkCutter.h.

---

Constructor & Destructor Documentation

vtkCutter::vtkCutter (  vtkImplicitFunction *    cf = NULL )  [protected]

vtkCutter::~vtkCutter (    )  [protected]

---

Member Function Documentation

virtual const char* vtkCutter::GetClassName (    )  [virtual]

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkDataSetToPolyDataFilter. Reimplemented in vtkCutPlane.

int vtkCutter::IsTypeOf (  const char *    type )  [static]

Return 1 if this class type 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 vtkDataSetToPolyDataFilter. Reimplemented in vtkCutPlane.

virtual int vtkCutter::IsA (  const char *    type )  [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 vtkDataSetToPolyDataFilter. Reimplemented in vtkCutPlane.

vtkCutter* vtkCutter::SafeDownCast (  vtkObject *    o )  [static]

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkDataSetToPolyDataFilter. Reimplemented in vtkCutPlane.

void vtkCutter::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 vtkSource. Reimplemented in vtkCutPlane.

vtkCutter* vtkCutter::New (    )  [static]

Construct with user-specified implicit function; initial value of 0.0; and generating cut scalars turned off. Reimplemented from vtkPolyDataSource. Reimplemented in vtkCutPlane.

void vtkCutter::SetValue (  int    i, float    value )  [inline]

Set a particular contour value at contour number i. The index i ranges between 0<=i<NumberOfContours. Definition at line 96 of file vtkCutter.h.

float vtkCutter::GetValue (  int    i )  [inline]

Get the ith contour value. Definition at line 102 of file vtkCutter.h.

float* vtkCutter::GetValues (    )  [inline]

Get a pointer to an array of contour values. There will be GetNumberOfContours() values in the list. Definition at line 109 of file vtkCutter.h.

void vtkCutter::GetValues (  float *    contourValues )  [inline]

Fill a supplied list with contour values. There will be GetNumberOfContours() values in the list. Make sure you allocate enough memory to hold the list. Definition at line 117 of file vtkCutter.h.

void vtkCutter::SetNumberOfContours (  int    number )  [inline]

Set the number of contours to place into the list. You only really need to use this method to reduce list size. The method SetValue() will automatically increase list size as needed. Definition at line 125 of file vtkCutter.h.

int vtkCutter::GetNumberOfContours (    )  [inline]

Get the number of contours in the list of contour values. Definition at line 131 of file vtkCutter.h.

void vtkCutter::GenerateValues (  int    numContours, float    range[2] )  [inline]

Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values. Definition at line 138 of file vtkCutter.h.

void vtkCutter::GenerateValues (  int    numContours, float    rangeStart, float    rangeEnd )  [inline]

Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values. Definition at line 145 of file vtkCutter.h.

unsigned long vtkCutter::GetMTime (    )  [virtual]

Override GetMTime because we delegate to vtkContourValues and refer to vtkImplicitFunction. Reimplemented from vtkObject.

virtual void vtkCutter::SetCutFunction (  vtkImplicitFunction *    )  [virtual]

Specify the implicit function to perform the cutting.

virtual vtkImplicitFunction* vtkCutter::GetCutFunction (    )  [virtual]

Specify the implicit function to perform the cutting.

virtual void vtkCutter::SetGenerateCutScalars (  int    )  [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual int vtkCutter::GetGenerateCutScalars (    )  [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual void vtkCutter::GenerateCutScalarsOn (    )  [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual void vtkCutter::GenerateCutScalarsOff (    )  [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

void vtkCutter::SetLocator (  vtkPointLocator *    locator )

Specify a spatial locator for merging points. By default, an instance of vtkMergePoints is used.

virtual vtkPointLocator* vtkCutter::GetLocator (    )  [virtual]

Specify a spatial locator for merging points. By default, an instance of vtkMergePoints is used.

virtual void vtkCutter::SetSortBy (  int    )  [virtual]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster).

virtual int vtkCutter::GetSortBy (    )  [virtual]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster).

void vtkCutter::SetSortByToSortByValue (    )  [inline]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Definition at line 186 of file vtkCutter.h.

void vtkCutter::SetSortByToSortByCell (    )  [inline]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Definition at line 188 of file vtkCutter.h.

const char * vtkCutter::GetSortByAsString (  void    )  [inline]

Return the sorting procedure as a descriptive character string. Definition at line 214 of file vtkCutter.h.

void vtkCutter::CreateDefaultLocator (  void    )

Create default locator. Used to create one when none is specified. The locator is used to merge coincident points.

void vtkCutter::Execute (    )  [protected, virtual]

This method is the old style execute method Reimplemented from vtkSource. Reimplemented in vtkCutPlane.

---

Member Data Documentation

vtkImplicitFunction* vtkCutter::CutFunction [protected]

Definition at line 202 of file vtkCutter.h.

vtkPointLocator* vtkCutter::Locator [protected]

Definition at line 204 of file vtkCutter.h.

int vtkCutter::SortBy [protected]

Definition at line 205 of file vtkCutter.h.

vtkContourValues* vtkCutter::ContourValues [protected]

Definition at line 206 of file vtkCutter.h.

int vtkCutter::GenerateCutScalars [protected]

Definition at line 207 of file vtkCutter.h.

---

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

• Graphics/vtkCutter.h

---