/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkCutMaterial.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   vtkCutMaterial
 * @brief   Automatically computes the cut plane for a material array pair.
 *
 * vtkCutMaterial computes a cut plane based on an up vector, center of the bounding box
 * and the location of the maximum variable value.
 *  These computed values are available so that they can be used to set the camera
 * for the best view of the plane.
*/

#ifndef vtkCutMaterial_h
#define vtkCutMaterial_h

#include "vtkFiltersParallelModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"

class vtkPlane;

class VTKFILTERSPARALLEL_EXPORT vtkCutMaterial : public vtkPolyDataAlgorithm
{
public:
  void PrintSelf(ostream& os, vtkIndent indent);
  vtkTypeMacro(vtkCutMaterial,vtkPolyDataAlgorithm);
  static vtkCutMaterial *New();

  //@{
  /**
   * Cell array that contains the material values.
   */
  vtkSetStringMacro(MaterialArrayName);
  vtkGetStringMacro(MaterialArrayName);
  //@}

  //@{
  /**
   * Material to probe.
   */
  vtkSetMacro(Material, int);
  vtkGetMacro(Material, int);
  //@}

  //@{
  /**
   * For now, we just use the cell values.
   * The array name to cut.
   */
  vtkSetStringMacro(ArrayName);
  vtkGetStringMacro(ArrayName);
  //@}

  //@{
  /**
   * The last piece of information that specifies the plane.
   */
  vtkSetVector3Macro(UpVector, double);
  vtkGetVector3Macro(UpVector, double);
  //@}

  //@{
  /**
   * Accesses to the values computed during the execute method.  They
   * could be used to get a good camera view for the resulting plane.
   */
  vtkGetVector3Macro(MaximumPoint, double);
  vtkGetVector3Macro(CenterPoint, double);
  vtkGetVector3Macro(Normal, double);
  //@}

protected:
  vtkCutMaterial();
  ~vtkCutMaterial();

  virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *); //generate output data
  virtual int FillInputPortInformation(int port, vtkInformation *info);
  void ComputeMaximumPoint(vtkDataSet *input);
  void ComputeNormal();

  char *MaterialArrayName;
  int Material;
  char *ArrayName;
  double UpVector[3];
  double MaximumPoint[3];
  double CenterPoint[3];
  double Normal[3];

  vtkPlane *PlaneFunction;

private:
  vtkCutMaterial(const vtkCutMaterial&) VTK_DELETE_FUNCTION;
  void operator=(const vtkCutMaterial&) VTK_DELETE_FUNCTION;
};

#endif