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/*=========================================================================
Program: Visualization Toolkit
Module: vtkDashedStreamLine.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 vtkDashedStreamLine
* @brief generate constant-time dashed streamline in arbitrary dataset
*
* vtkDashedStreamLine is a filter that generates a "dashed" streamline for
* an arbitrary dataset. The streamline consists of a series of dashes, each
* of which represents (approximately) a constant time increment. Thus, in the
* resulting visual representation, relatively long dashes represent areas of
* high velocity, and small dashes represent areas of low velocity.
*
* vtkDashedStreamLine introduces the instance variable DashFactor.
* DashFactor interacts with its superclass' instance variable StepLength to
* create the dashes. DashFactor is the percentage of the StepLength line
* segment that is visible. Thus, if the DashFactor=0.75, the dashes will be
* "three-quarters on" and "one-quarter off".
*
* @sa
* vtkStreamer vtkStreamLine vtkStreamPoints
*/
#ifndef vtkDashedStreamLine_h
#define vtkDashedStreamLine_h
#include "vtkFiltersFlowPathsModule.h" // For export macro
#include "vtkStreamLine.h"
#ifndef VTK_LEGACY_REMOVE
class VTKFILTERSFLOWPATHS_EXPORT vtkDashedStreamLine : public vtkStreamLine
{
public:
static vtkDashedStreamLine *New();
vtkTypeMacro(vtkDashedStreamLine,vtkStreamLine);
void PrintSelf(ostream& os, vtkIndent indent);
//@{
/**
* For each dash, specify the fraction of the dash that is "on". A factor
* of 1.0 will result in a continuous line, a factor of 0.5 will result in
* dashed that are half on and half off.
*/
vtkSetClampMacro(DashFactor,double,0.01,1.0);
vtkGetMacro(DashFactor,double);
//@}
protected:
vtkDashedStreamLine();
~vtkDashedStreamLine() {}
// Convert streamer array into vtkPolyData
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
// the fraction of on versus off in dash
double DashFactor;
private:
vtkDashedStreamLine(const vtkDashedStreamLine&) VTK_DELETE_FUNCTION;
void operator=(const vtkDashedStreamLine&) VTK_DELETE_FUNCTION;
};
#endif // VTK_LEGACY_REMOVE
#endif
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