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#ifndef VTK_VISIT_CLIPPER_H
#define VTK_VISIT_CLIPPER_H

#include <visit_vtk_exports.h>
#include "vtkUnstructuredGridAlgorithm.h"

class vtkImplicitFunction;
class vtkUnstructuredGrid;

// ****************************************************************************
//  Class:  vtkVisItClipper
//
//  Purpose:
//    Clips a dataset using an implicit function.  This is a wholesale
//    replacement for the internal VTK clipper for structured, rectilinear,
//    and unstructured datasets with three topological dimensions and cell
//    types that are a part of the normal zoo.
//
//  Programmer:  Jeremy Meredith
//  Creation:    August 11, 2003
//
//  Modifications:
//    Jeremy Meredith, Fri Jan 30 16:15:50 PST 2004
//    Added scalar array and scalar range for isovolume.
//
//    Jeremy Meredith, Mon Feb 16 19:08:16 PST 2004
//    Added PolyData support.
//
//    Jeremy Meredith, Wed May  5 13:06:14 PDT 2004
//    Renamed without the "3D" because I also made it support 2D.
//    Changed it to a single cutoff for scalars to make the math more robust.
//
//    Jeremy Meredith, Tue Aug 29 13:43:56 EDT 2006
//    Added support for forcing removal of entire cells instead of clipping.
//
//    Mark C. Miller, Sun Dec  3 12:20:11 PST 2006
//    Added flag to use zero-crossings of the implicit function. 
//    Added flat to compute inside and out in single execute.
//
//    Hank Childs, Sat Sep 29 11:14:58 PDT 2007
//    Make change to argument of function (SetClipScalars), which is necessary
//    for non-traditional cell types (hex-20).  Also add support for data
//    types beyond floats.
//
// ****************************************************************************

class VISIT_VTK_API vtkVisItClipper
    : public vtkUnstructuredGridAlgorithm
{
  public:
    vtkTypeMacro(vtkVisItClipper,vtkUnstructuredGridAlgorithm);
    void PrintSelf(ostream& os, vtkIndent indent);

    static vtkVisItClipper *New();

    virtual void SetRemoveWholeCells(bool);
    virtual void SetClipFunction(vtkImplicitFunction*);
    virtual void SetClipScalars(vtkDataArray *, float);
    virtual void SetInsideOut(bool);
    virtual void SetComputeInsideAndOut(bool);
    virtual void SetUseZeroCrossings(bool);
    virtual vtkUnstructuredGrid *GetOtherOutput();

    void SetCellList(int *, int);
    virtual void SetUpClipFunction(int) { ; };


  protected:
    vtkVisItClipper();
    ~vtkVisItClipper();

    int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
    int FillInputPortInformation(int port, vtkInformation *info);
    void ClipDataset(vtkDataSet *, vtkUnstructuredGrid *);

    int *CellList;
    int  CellListSize;
  private:
    bool   removeWholeCells;
    bool   insideOut;
    vtkImplicitFunction *clipFunction;
    bool   iOwnData;
    float *scalarArray;
    vtkDataArray *scalarArrayAsVTK;
    float  scalarCutoff;
    bool   scalarFlip;
    bool   useZeroCrossings;
    bool   computeInsideAndOut;

    vtkUnstructuredGrid *otherOutput;

    vtkVisItClipper(const vtkVisItClipper&);  // Not implemented.
    void operator=(const vtkVisItClipper&);  // Not implemented.
};


#endif


