vtkContourHelper Class Reference

A utility class used by various contour filters. More...

#include <vtkContourHelper.h>

Public Member Functions
	vtkContourHelper (vtkIncrementalPointLocator *locator, vtkCellArray *outVerts, vtkCellArray *outLines, vtkCellArray *outPolys, vtkPointData *inPd, vtkCellData *inCd, vtkPointData *outPd, vtkCellData *outCd, int trisEstimatedSize, bool outputTriangles)
	Contour helper constructor.
	vtkContourHelper (vtkIncrementalPointLocator *locator, vtkCellArray *outVerts, vtkCellArray *outLines, vtkCellArray *outPolys, vtkPointData *inPd, vtkCellData *inCd, vtkPointData *outPd, vtkCellData *outCd, bool outputTriangles)
	Contour helper constructor.
	~vtkContourHelper ()=default
void	Contour (vtkCell *cell, double value, vtkDataArray *cellScalars, vtkIdType cellId)
	Generate contour for the given cell (and add it to the final result).

Detailed Description

A utility class used by various contour filters.

This is a simple utility class that can be used by various contour filters to produce either triangles and/or polygons based on the outputTriangles parameter.

When working with multidimensional dataset, it is needed to process cells from low to high dimensions.

See also

vtkContourGrid vtkCutter vtkContourFilter

Definition at line 35 of file vtkContourHelper.h.

Constructor & Destructor Documentation

vtkContourHelper() [1/2]

vtkContourHelper::vtkContourHelper	(	vtkIncrementalPointLocator *	locator,
		vtkCellArray *	outVerts,
		vtkCellArray *	outLines,
		vtkCellArray *	outPolys,
		vtkPointData *	inPd,
		vtkCellData *	inCd,
		vtkPointData *	outPd,
		vtkCellData *	outCd,
		int	trisEstimatedSize,
		bool	outputTriangles )

Contour helper constructor.

Parameters

locator	Locator used to "carry" and merge contour points (avoid duplicates)
outVerts	Contour vertices, incremented at each Contour call
outLines	Contour lines, incremented at each Contour call
outPolys	Contour polys, incremented at each Contour call
inPd	Input point data, that will be interpolated on output contour point data
inCd	Input cell data, that will be copied on output contour cell data
outPd	If not nullptr, will contains contour point data, interpolated from inPd
outCd	If not nullptr, will contains contour cell data, copied from inCd
trisEstimatedSize	used to allocate memory for temporary triangles created by contouring before merging them. Only used if outputTriangles is true.
outputTriangles	if true, the contour helper will output triangles directly and will not merge them.

vtkContourHelper() [2/2]

vtkContourHelper::vtkContourHelper	(	vtkIncrementalPointLocator *	locator,
		vtkCellArray *	outVerts,
		vtkCellArray *	outLines,
		vtkCellArray *	outPolys,
		vtkPointData *	inPd,
		vtkCellData *	inCd,
		vtkPointData *	outPd,
		vtkCellData *	outCd,
		bool	outputTriangles )

Contour helper constructor.

Parameters

locator	Locator used to "carry" and merge contour points (avoid duplicates)
outVerts	Contour vertices, incremented at each Contour call
outLines	Contour lines, incremented at each Contour call
outPolys	Contour polys, incremented at each Contour call
inPd	Input point data, that will be interpolated on output contour point data
inCd	Input cell data, that will be copied on output contour cell data
outPd	If not nullptr, will contains contour point data, interpolated from inPd
outCd	If not nullptr, will contains contour cell data, copied from inCd
outputTriangles	if true, the contour helper will output triangles directly and will not merge them.

~vtkContourHelper()

vtkContourHelper::~vtkContourHelper ( )

default

Member Function Documentation

Contour()

void vtkContourHelper::Contour	(	vtkCell *	cell,
		double	value,
		vtkDataArray *	cellScalars,
		vtkIdType	cellId )

Generate contour for the given cell (and add it to the final result).

Parameters

cell	Cell to contour
value	Contour value
cellScalars	Scalar values at each point to contour with. Should be indexed with local cell points ids.
cellId	Contoured cell id, used to copy cell data to the contour (see inCd and outCd parameters in the constructor)

Attention

This method is not thread safe. A multi-threaded program would have to create one instance of the helper per thread, with isolated critical sections (output data pointers).

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

• Filters/Core/vtkContourHelper.h