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/*=========================================================================
Program: Visualization Toolkit
Module: vtkStripper.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.
=========================================================================*/
// .NAME vtkStripper - create triangle strips and/or poly-lines
// .SECTION Description
// vtkStripper is a filter that generates triangle strips and/or poly-lines
// from input polygons, triangle strips, and lines. Input polygons are
// assembled into triangle strips only if they are triangles; other types of
// polygons are passed through to the output and not stripped. (Use
// vtkTriangleFilter to triangulate non-triangular polygons prior to running
// this filter if you need to strip all the data.) The filter will pass
// through (to the output) vertices if they are present in the input
// polydata.
//
// The ivar MaximumLength can be used to control the maximum
// allowable triangle strip and poly-line length.
//
// By default, this filter discards any cell data associated with the input.
// Thus is because the cell structure changes and and the old cell data
// is no longer valid. When PassCellDataAsFieldData flag is set,
// the cell data is passed as FieldData to the output using the following rule:
// 1) for every cell in the output that is not a triangle strip,
// the cell data is inserted once per cell in the output field data.
// 2) for every triangle strip cell in the output:
// ii) 1 tuple is inserted for every point(j|j>=2) in the strip.
// This is the cell data for the cell formed by (j-2, j-1, j) in
// the input.
// The field data order is same as cell data i.e. (verts,line,polys,tsrips).
// .SECTION Caveats
// If triangle strips or poly-lines exist in the input data they will
// be passed through to the output data. This filter will only construct
// triangle strips if triangle polygons are available; and will only
// construct poly-lines if lines are available.
// .SECTION See Also
// vtkTriangleFilter
#ifndef __vtkStripper_h
#define __vtkStripper_h
#include "vtkPolyDataAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkStripper : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkStripper,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct object with MaximumLength set to 1000.
static vtkStripper *New();
// Description:
// Specify the maximum number of triangles in a triangle strip,
// and/or the maximum number of lines in a poly-line.
vtkSetClampMacro(MaximumLength,int,4,100000);
vtkGetMacro(MaximumLength,int);
// Description:
// Enable/Disable passing of the CellData in the input to
// the output as FieldData. Note the field data is tranformed.
vtkBooleanMacro(PassCellDataAsFieldData, int);
vtkSetMacro(PassCellDataAsFieldData, int);
vtkGetMacro(PassCellDataAsFieldData, int);
// Description:
// If on, the output polygonal dataset will have a celldata array that
// holds the cell index of the original 3D cell that produced each output
// cell. This is useful for picking. The default is off to conserve
// memory.
vtkSetMacro(PassThroughCellIds,int);
vtkGetMacro(PassThroughCellIds,int);
vtkBooleanMacro(PassThroughCellIds,int);
// Description:
// If on, the output polygonal dataset will have a pointdata array that
// holds the point index of the original vertex that produced each output
// vertex. This is useful for picking. The default is off to conserve
// memory.
vtkSetMacro(PassThroughPointIds,int);
vtkGetMacro(PassThroughPointIds,int);
vtkBooleanMacro(PassThroughPointIds,int);
protected:
vtkStripper();
~vtkStripper() {}
// Usual data generation method
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
int MaximumLength;
int PassCellDataAsFieldData;
int PassThroughCellIds;
int PassThroughPointIds;
private:
vtkStripper(const vtkStripper&); // Not implemented.
void operator=(const vtkStripper&); // Not implemented.
};
#endif
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