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/*****************************************************************************
*
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* Copyright (c) 2000 - 2017, Lawrence Livermore National Security, LLC
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* Produced at the Lawrence Livermore National Laboratory
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* LLNL-CODE-442911
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* All rights reserved.
*
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* This file is  part of VisIt. For  details, see https://visit.llnl.gov/.  The
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* full copyright notice is contained in the file COPYRIGHT located at the root
* of the VisIt distribution or at http://www.llnl.gov/visit/copyright.html.
*
* Redistribution  and  use  in  source  and  binary  forms,  with  or  without
* modification, are permitted provided that the following conditions are met:
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*  - Redistributions of  source code must  retain the above  copyright notice,
*    this list of conditions and the disclaimer below.
*  - Redistributions in binary form must reproduce the above copyright notice,
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*    documentation and/or other materials provided with the distribution.
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*    be used to endorse or promote products derived from this software without
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*    specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS "AS IS"
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* ARE  DISCLAIMED. IN  NO EVENT  SHALL LAWRENCE  LIVERMORE NATIONAL  SECURITY,
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* DAMAGES (INCLUDING, BUT NOT  LIMITED TO, PROCUREMENT OF  SUBSTITUTE GOODS OR
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#ifndef VTK_VISIT_CLIPPER_H
#define VTK_VISIT_CLIPPER_H
#include <visit_vtk_exports.h>
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#include "vtkUnstructuredGridAlgorithm.h"
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class vtkImplicitFunction;
class vtkUnstructuredGrid;

// ****************************************************************************
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//  Class:  vtkVisItClipper
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//
//  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
//
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//  Modifications:
//    Jeremy Meredith, Fri Jan 30 16:15:50 PST 2004
//    Added scalar array and scalar range for isovolume.
//
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//    Jeremy Meredith, Mon Feb 16 19:08:16 PST 2004
//    Added PolyData support.
//
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//    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.
//
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//    Jeremy Meredith, Tue Aug 29 13:43:56 EDT 2006
//    Added support for forcing removal of entire cells instead of clipping.
//
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//    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.
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//
//    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.
//
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//    Brad Whitlock, Tue Mar 27 15:30:23 PDT 2012
//    Group members into FilterState class so it's easier to pass the filter's
//    state to internal template functions.
//
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//    Kathleen Biagas, Tue Aug 15 11:22:11 MST 2012
//    Renamed SetUpClipFunction to ModifyClip.  Added SetPrecomputeClipScalars.
//
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// ****************************************************************************
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class VISIT_VTK_API vtkVisItClipper : public vtkUnstructuredGridAlgorithm
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{
  public:
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    vtkTypeMacro(vtkVisItClipper,vtkUnstructuredGridAlgorithm);
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    void PrintSelf(ostream& os, vtkIndent indent);

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    static vtkVisItClipper *New();
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    virtual void SetRemoveWholeCells(bool);
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    virtual void SetClipFunction(vtkImplicitFunction*);
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    virtual void SetClipScalars(vtkDataArray *, float);
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    virtual void SetInsideOut(bool);
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    virtual void SetComputeInsideAndOut(bool);
    virtual void SetUseZeroCrossings(bool);
    virtual vtkUnstructuredGrid *GetOtherOutput();
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    void SetCellList(const vtkIdType *, vtkIdType);
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    void SetPrecomputeClipScalars(const bool v);
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    virtual void ModifyClip(vtkDataSet *, vtkIdType) {; };
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    struct FilterState
    {
        FilterState();
       ~FilterState();
        void SetCellList(const vtkIdType *, vtkIdType);
        void SetClipFunction(vtkImplicitFunction *func);
        void SetClipScalars(vtkDataArray *, double);
        void ClipDataset(vtkDataSet *in_ds, vtkUnstructuredGrid *out_ds);

        const vtkIdType     *CellList;
        vtkIdType            CellListSize;
  
        vtkImplicitFunction *clipFunction;
        vtkDataArray        *scalarArrayAsVTK;
        double               scalarCutoff;

        vtkUnstructuredGrid *otherOutput;

        bool                 removeWholeCells;
        bool                 insideOut;
        bool                 useZeroCrossings;
        bool                 computeInsideAndOut;
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        bool                 precomputeClipScalars;
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    };
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  protected:
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    vtkVisItClipper();
    ~vtkVisItClipper();
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    virtual int RequestData(vtkInformation *,
                            vtkInformationVector **,
                            vtkInformationVector *);
    virtual int FillInputPortInformation(int port, vtkInformation *info);

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    void ClipDataset(vtkDataSet *, vtkUnstructuredGrid *);
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  private:
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    // Contains the state for the filter.
    FilterState state;
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    vtkVisItClipper(const vtkVisItClipper&);  // Not implemented.
    void operator=(const vtkVisItClipper&);  // Not implemented.
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};

#endif