vtkClipDataSet Class Reference

#include <vtkClipDataSet.h>

Inheritance diagram for vtkClipDataSet:

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Collaboration diagram for vtkClipDataSet:

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List of all members.


Detailed Description

clip any dataset with user-specified implicit function or input scalar data

vtkClipDataSet is a filter that clips any type of dataset using either any subclass of vtkImplicitFunction, or the input scalar data. Clipping means that it actually "cuts" through the cells of the dataset, returning everything inside of the specified implicit function (or greater than the scalar value) including "pieces" of a cell. (Compare this with vtkExtractGeometry, which pulls out entire, uncut cells.) The output of this filter is an unstructured grid.

To use this filter, you must decide if you will be clipping with an implicit function, or whether you will be using the input scalar data. If you want to clip with an implicit function, you must: 1) define an implicit function 2) set it with the SetClipFunction method 3) apply the GenerateClipScalarsOn method If a ClipFunction is not specified, or GenerateClipScalars is off (the default), then the input's scalar data will be used to clip the polydata.

You can also specify a scalar value, which is used to decide what is inside and outside of the implicit function. You can also reverse the sense of what inside/outside is by setting the InsideOut instance variable. (The clipping algorithm proceeds by computing an implicit function value or using the input scalar data for each point in the dataset. This is compared to the scalar value to determine inside/outside.)

This filter can be configured to compute a second output. The second output is the part of the cell that is clipped away. Set the GenerateClippedData boolean on if you wish to access this output data.

Warning:
vtkClipDataSet will triangulate all types of 3D cells (i.e., create tetrahedra). This is true even if the cell is not actually cut. This is necessary to preserve compatibility across face neighbors. 2D cells will only be triangulated if the cutting function passes through them.
See also:
vtkImplicitFunction vtkCutter vtkClipVolume vtkClipPolyData
Tests:
vtkClipDataSet (Tests)

Definition at line 71 of file vtkClipDataSet.h.


Public Types

typedef
vtkUnstructuredGridAlgorithm 
Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
vtkUnstructuredGridGetClippedOutput ()
void CreateDefaultLocator ()
unsigned long GetMTime ()
virtual void SetValue (double)
virtual double GetValue ()
virtual void SetUseValueAsOffset (bool)
virtual bool GetUseValueAsOffset ()
virtual void UseValueAsOffsetOn ()
virtual void UseValueAsOffsetOff ()
virtual void SetInsideOut (int)
virtual int GetInsideOut ()
virtual void InsideOutOn ()
virtual void InsideOutOff ()
virtual void SetClipFunction (vtkImplicitFunction *)
virtual vtkImplicitFunctionGetClipFunction ()
virtual void SetGenerateClipScalars (int)
virtual int GetGenerateClipScalars ()
virtual void GenerateClipScalarsOn ()
virtual void GenerateClipScalarsOff ()
virtual void SetGenerateClippedOutput (int)
virtual int GetGenerateClippedOutput ()
virtual void GenerateClippedOutputOn ()
virtual void GenerateClippedOutputOff ()
virtual void SetMergeTolerance (double)
virtual double GetMergeTolerance ()
void SetLocator (vtkPointLocator *locator)
virtual vtkPointLocatorGetLocator ()

Static Public Member Functions

static int IsTypeOf (const char *type)
static vtkClipDataSetSafeDownCast (vtkObject *o)
static vtkClipDataSetNew ()

Protected Member Functions

 vtkClipDataSet (vtkImplicitFunction *cf=NULL)
 ~vtkClipDataSet ()
virtual int RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
virtual int FillInputPortInformation (int port, vtkInformation *info)
void InternalProgressCallback (vtkAlgorithm *algorithm)
void ClipVolume (vtkDataSet *input, vtkUnstructuredGrid *output)
int ClipPoints (vtkDataSet *input, vtkUnstructuredGrid *output, vtkInformationVector **inputVector)

Static Protected Member Functions

static void InternalProgressCallbackFunction (vtkObject *, unsigned long, void *clientdata, void *)

Protected Attributes

vtkImplicitFunctionClipFunction
vtkPointLocatorLocator
int InsideOut
double Value
int GenerateClipScalars
int GenerateClippedOutput
double MergeTolerance
vtkCallbackCommandInternalProgressObserver
bool UseValueAsOffset

Member Typedef Documentation

Reimplemented from vtkUnstructuredGridAlgorithm.

Definition at line 74 of file vtkClipDataSet.h.


Constructor & Destructor Documentation

vtkClipDataSet::vtkClipDataSet ( vtkImplicitFunction cf = NULL  )  [protected]

vtkClipDataSet::~vtkClipDataSet (  )  [protected]


Member Function Documentation

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

Reimplemented from vtkUnstructuredGridAlgorithm.

static int vtkClipDataSet::IsTypeOf ( const char *  name  )  [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkUnstructuredGridAlgorithm.

virtual int vtkClipDataSet::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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkUnstructuredGridAlgorithm.

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

Reimplemented from vtkUnstructuredGridAlgorithm.

void vtkClipDataSet::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 vtkUnstructuredGridAlgorithm.

static vtkClipDataSet* vtkClipDataSet::New (  )  [static]

Construct with user-specified implicit function; InsideOut turned off; value set to 0.0; and generate clip scalars turned off.

Reimplemented from vtkUnstructuredGridAlgorithm.

virtual void vtkClipDataSet::SetValue ( double   )  [virtual]

Set the clipping value of the implicit function (if clipping with implicit function) or scalar value (if clipping with scalars). The default value is 0.0. This value is ignored if UseValueAsOffset is true and a clip function is defined.

virtual double vtkClipDataSet::GetValue (  )  [virtual]

Set the clipping value of the implicit function (if clipping with implicit function) or scalar value (if clipping with scalars). The default value is 0.0. This value is ignored if UseValueAsOffset is true and a clip function is defined.

virtual void vtkClipDataSet::SetUseValueAsOffset ( bool   )  [virtual]

If UseValueAsOffset is true, Value is used as an offset parameter to the implicit function. Otherwise, Value is used only when clipping using a scalar array. Default is true.

virtual bool vtkClipDataSet::GetUseValueAsOffset (  )  [virtual]

If UseValueAsOffset is true, Value is used as an offset parameter to the implicit function. Otherwise, Value is used only when clipping using a scalar array. Default is true.

virtual void vtkClipDataSet::UseValueAsOffsetOn (  )  [virtual]

If UseValueAsOffset is true, Value is used as an offset parameter to the implicit function. Otherwise, Value is used only when clipping using a scalar array. Default is true.

virtual void vtkClipDataSet::UseValueAsOffsetOff (  )  [virtual]

If UseValueAsOffset is true, Value is used as an offset parameter to the implicit function. Otherwise, Value is used only when clipping using a scalar array. Default is true.

virtual void vtkClipDataSet::SetInsideOut ( int   )  [virtual]

Set/Get the InsideOut flag. When off, a vertex is considered inside the implicit function if its value is greater than the Value ivar. When InsideOutside is turned on, a vertex is considered inside the implicit function if its implicit function value is less than or equal to the Value ivar. InsideOut is off by default.

virtual int vtkClipDataSet::GetInsideOut (  )  [virtual]

Set/Get the InsideOut flag. When off, a vertex is considered inside the implicit function if its value is greater than the Value ivar. When InsideOutside is turned on, a vertex is considered inside the implicit function if its implicit function value is less than or equal to the Value ivar. InsideOut is off by default.

virtual void vtkClipDataSet::InsideOutOn (  )  [virtual]

Set/Get the InsideOut flag. When off, a vertex is considered inside the implicit function if its value is greater than the Value ivar. When InsideOutside is turned on, a vertex is considered inside the implicit function if its implicit function value is less than or equal to the Value ivar. InsideOut is off by default.

virtual void vtkClipDataSet::InsideOutOff (  )  [virtual]

Set/Get the InsideOut flag. When off, a vertex is considered inside the implicit function if its value is greater than the Value ivar. When InsideOutside is turned on, a vertex is considered inside the implicit function if its implicit function value is less than or equal to the Value ivar. InsideOut is off by default.

virtual void vtkClipDataSet::SetClipFunction ( vtkImplicitFunction  )  [virtual]

Specify the implicit function with which to perform the clipping. If you do not define an implicit function, then the selected input scalar data will be used for clipping.

virtual vtkImplicitFunction* vtkClipDataSet::GetClipFunction (  )  [virtual]

Specify the implicit function with which to perform the clipping. If you do not define an implicit function, then the selected input scalar data will be used for clipping.

virtual void vtkClipDataSet::SetGenerateClipScalars ( 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. If you enable this flag but do not provide an implicit function an error will be reported.

virtual int vtkClipDataSet::GetGenerateClipScalars (  )  [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. If you enable this flag but do not provide an implicit function an error will be reported.

virtual void vtkClipDataSet::GenerateClipScalarsOn (  )  [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. If you enable this flag but do not provide an implicit function an error will be reported.

virtual void vtkClipDataSet::GenerateClipScalarsOff (  )  [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. If you enable this flag but do not provide an implicit function an error will be reported.

virtual void vtkClipDataSet::SetGenerateClippedOutput ( int   )  [virtual]

Control whether a second output is generated. The second output contains the polygonal data that's been clipped away.

virtual int vtkClipDataSet::GetGenerateClippedOutput (  )  [virtual]

Control whether a second output is generated. The second output contains the polygonal data that's been clipped away.

virtual void vtkClipDataSet::GenerateClippedOutputOn (  )  [virtual]

Control whether a second output is generated. The second output contains the polygonal data that's been clipped away.

virtual void vtkClipDataSet::GenerateClippedOutputOff (  )  [virtual]

Control whether a second output is generated. The second output contains the polygonal data that's been clipped away.

virtual void vtkClipDataSet::SetMergeTolerance ( double   )  [virtual]

Set the tolerance for merging clip intersection points that are near the vertices of cells. This tolerance is used to prevent the generation of degenerate primitives. Note that only 3D cells actually use this instance variable.

virtual double vtkClipDataSet::GetMergeTolerance (  )  [virtual]

Set the tolerance for merging clip intersection points that are near the vertices of cells. This tolerance is used to prevent the generation of degenerate primitives. Note that only 3D cells actually use this instance variable.

vtkUnstructuredGrid* vtkClipDataSet::GetClippedOutput (  ) 

Return the Clipped output.

void vtkClipDataSet::SetLocator ( vtkPointLocator locator  ) 

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

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

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

void vtkClipDataSet::CreateDefaultLocator (  ) 

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

unsigned long vtkClipDataSet::GetMTime (  )  [virtual]

Return the mtime also considering the locator and clip function.

Reimplemented from vtkObject.

virtual int vtkClipDataSet::RequestData ( vtkInformation request,
vtkInformationVector **  inputVector,
vtkInformationVector outputVector 
) [protected, virtual]

This is called by the superclass. This is the method you should override.

Reimplemented from vtkUnstructuredGridAlgorithm.

virtual int vtkClipDataSet::FillInputPortInformation ( int  port,
vtkInformation info 
) [protected, virtual]

Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.

Reimplemented from vtkUnstructuredGridAlgorithm.

static void vtkClipDataSet::InternalProgressCallbackFunction ( vtkObject ,
unsigned  long,
void *  clientdata,
void *   
) [static, protected]

void vtkClipDataSet::InternalProgressCallback ( vtkAlgorithm algorithm  )  [protected]

void vtkClipDataSet::ClipVolume ( vtkDataSet input,
vtkUnstructuredGrid output 
) [protected]

int vtkClipDataSet::ClipPoints ( vtkDataSet input,
vtkUnstructuredGrid output,
vtkInformationVector **  inputVector 
) [protected]


Member Data Documentation

Definition at line 168 of file vtkClipDataSet.h.

Definition at line 170 of file vtkClipDataSet.h.

int vtkClipDataSet::InsideOut [protected]

Definition at line 171 of file vtkClipDataSet.h.

double vtkClipDataSet::Value [protected]

Definition at line 172 of file vtkClipDataSet.h.

Definition at line 173 of file vtkClipDataSet.h.

Definition at line 175 of file vtkClipDataSet.h.

double vtkClipDataSet::MergeTolerance [protected]

Definition at line 176 of file vtkClipDataSet.h.

Definition at line 183 of file vtkClipDataSet.h.

Definition at line 191 of file vtkClipDataSet.h.


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

Generated on Sat Dec 27 13:19:56 2008 for VTK by  doxygen 1.5.6