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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGenericContourFilter.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkGenericContourFilter
* @brief generate isocontours from input dataset
*
* vtkGenericContourFilter is a filter that takes as input any (generic)
* 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.
*
* 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. You can use ComputeNormalsOn to compute the normals
* without the need of a vtkPolyDataNormals
*
* This filter has been implemented to operate on generic datasets, rather
* than the typical vtkDataSet (and subclasses). vtkGenericDataSet is a more
* complex cousin of vtkDataSet, typically consisting of nonlinear,
* higher-order cells. To process this type of data, generic cells are
* automatically tessellated into linear cells prior to isocontouring.
*
* @sa
* vtkContourFilter vtkGenericDataSet
*/
#ifndef vtkGenericContourFilter_h
#define vtkGenericContourFilter_h
#include "vtkFiltersGenericModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
class vtkContourValues;
class vtkIncrementalPointLocator;
class vtkPointData;
class vtkCellData;
class VTKFILTERSGENERIC_EXPORT vtkGenericContourFilter : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkGenericContourFilter,
vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
/**
* Construct object with initial range (0,1) and single contour value
* of 0.0.
*/
static vtkGenericContourFilter *New();
typedef double PointType[3]; // Arbitrary definition of a point
//@{
/**
* Methods to set / get contour values.
*/
void SetValue(int i, float value);
double GetValue(int i);
double *GetValues();
void GetValues(double *contourValues);
void SetNumberOfContours(int number);
int GetNumberOfContours();
void GenerateValues(int numContours, double range[2]);
void GenerateValues(int numContours, double rangeStart, double rangeEnd);
//@}
/**
* Modified GetMTime Because we delegate to vtkContourValues
*/
vtkMTimeType GetMTime();
//@{
/**
* Set/Get the computation of normals. Normal computation is fairly
* expensive in both time and storage. If the output data will be
* processed by filters that modify topology or geometry, it may be
* wise to turn Normals and Gradients off.
*/
vtkSetMacro(ComputeNormals,int);
vtkGetMacro(ComputeNormals,int);
vtkBooleanMacro(ComputeNormals,int);
//@}
//@{
/**
* Set/Get the computation of gradients. Gradient computation is
* fairly expensive in both time and storage. Note that if
* ComputeNormals is on, gradients will have to be calculated, but
* will not be stored in the output dataset. If the output data
* will be processed by filters that modify topology or geometry, it
* may be wise to turn Normals and Gradients off.
*/
vtkSetMacro(ComputeGradients,int);
vtkGetMacro(ComputeGradients,int);
vtkBooleanMacro(ComputeGradients,int);
//@}
//@{
/**
* Set/Get the computation of scalars.
*/
vtkSetMacro(ComputeScalars,int);
vtkGetMacro(ComputeScalars,int);
vtkBooleanMacro(ComputeScalars,int);
//@}
//@{
/**
* Set / get a spatial locator for merging points. By default,
* an instance of vtkMergePoints is used.
*/
void SetLocator(vtkIncrementalPointLocator *locator);
vtkGetObjectMacro(Locator,vtkIncrementalPointLocator);
//@}
/**
* Create default locator. Used to create one when none is
* specified. The locator is used to merge coincident points.
*/
void CreateDefaultLocator();
//@{
/**
* If you want to contour by an arbitrary scalar attribute, then set its
* name here.
* By default this in NULL and the filter will use the active scalar array.
*/
vtkGetStringMacro(InputScalarsSelection);
virtual void SelectInputScalars(const char *fieldName);
//@}
protected:
vtkGenericContourFilter();
~vtkGenericContourFilter();
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
int FillInputPortInformation(int, vtkInformation*);
vtkContourValues *ContourValues;
int ComputeNormals;
int ComputeGradients;
int ComputeScalars;
vtkIncrementalPointLocator *Locator;
char *InputScalarsSelection;
vtkSetStringMacro(InputScalarsSelection);
// Used internal by vtkGenericAdaptorCell::Contour()
vtkPointData *InternalPD;
vtkPointData *SecondaryPD;
vtkCellData *SecondaryCD;
private:
vtkGenericContourFilter(const vtkGenericContourFilter&) VTK_DELETE_FUNCTION;
void operator=(const vtkGenericContourFilter&) VTK_DELETE_FUNCTION;
};
#endif
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