---

vtkKitwareContourFilter Class Reference

generate isosurfaces/isolines from scalar values. More...

#include <vtkKitwareContourFilter.h>

Inheritance diagram for vtkKitwareContourFilter:

[legend]Collaboration diagram for vtkKitwareContourFilter:

[legend]List of all members.

Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
Static Public Methods
int	IsTypeOf (const char *type)
vtkKitwareContourFilter *	SafeDownCast (vtkObject *o)
vtkKitwareContourFilter *	New ()
Protected Methods
	vtkKitwareContourFilter ()
	~vtkKitwareContourFilter ()
void	ComputeInputUpdateExtents (vtkDataObject *data)
void	Execute ()
void	ExecuteInformation ()
void	StructuredPointsContour (int dim)
void	StructuredGridContour (int dim)
void	DataSetContour ()

---

Detailed Description

generate isosurfaces/isolines from scalar values.

Date:

2001/10/11 13:38:03

Revision:

1.14

vtkKitwareContourFilter is a filter that takes as input any dataset and generates on output isosurfaces and/or isolines. The exact form of the output depends upon the dimensionality of the input data. Data consisting of 3D cells will generate isosurfaces, data consisting of 2D cells will generate isolines, and data with 1D or 0D cells will generate isopoints. Combinations of output type are possible if the input dimension is mixed.

This filter will identify special dataset types (e.g., structured points) and use the appropriate specialized filter to process the data. For examples, if the input dataset type is a volume, this filter will create an internal vtkSyncronizedTemplates3D instance and use it. This gives much better performance on StructuredPoints and StructuredGrids.

To use this filter you must specify one or more contour values. You can either use the method SetValue() to specify each contour value, or use GenerateValues() to generate a series of evenly spaced contours. It is also possible to accelerate the operation of this filter (at the cost of extra memory) by using a vtkScalarTree. A scalar tree is used to quickly locate cells that contain a contour surface. This is especially effective if multiple contours are being extracted. If you want to use a scalar tree, invoke the method UseScalarTreeOn().

Warning:

For StructuredPoints And StructuredGrids, normals are computed by default, but it is an expensive computation. Processing for other data set types has not been extended to include normal computation. In the mean time, use vtkPolyDataNormals to compute the surface normals.

See also:

vtkSynchronizedTemplates3D vtkSynchronizedTemplates2D vtkGridSynchronizedTemplates3D

Tests:

vtkKitwareContourFilter (Tests)

Definition at line 91 of file vtkKitwareContourFilter.h.

---

Constructor & Destructor Documentation

vtkKitwareContourFilter::vtkKitwareContourFilter (    )  [protected]

vtkKitwareContourFilter::~vtkKitwareContourFilter (    )  [protected]

---

Member Function Documentation

virtual const char* vtkKitwareContourFilter::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 vtkContourFilter.

int vtkKitwareContourFilter::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 vtkContourFilter.

virtual int vtkKitwareContourFilter::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 vtkContourFilter.

vtkKitwareContourFilter* vtkKitwareContourFilter::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 vtkContourFilter.

vtkKitwareContourFilter* vtkKitwareContourFilter::New (    )  [static]

Construct object with initial range (0,1) and single contour value of 0.0. Reimplemented from vtkContourFilter.

void vtkKitwareContourFilter::ComputeInputUpdateExtents (  vtkDataObject *    data )  [protected, virtual]

Do not let images return more than requested. Reimplemented from vtkDataSetToPolyDataFilter.

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

This method is the old style execute method Reimplemented from vtkContourFilter.

void vtkKitwareContourFilter::ExecuteInformation (    )  [protected, virtual]

Reimplemented from vtkSource.

void vtkKitwareContourFilter::StructuredPointsContour (  int    dim )  [protected]

void vtkKitwareContourFilter::StructuredGridContour (  int    dim )  [protected]

void vtkKitwareContourFilter::DataSetContour (    )  [protected]

---

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

• Patented/vtkKitwareContourFilter.h

---