vtkSplitField.h

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

  Program:   Visualization Toolkit
  Module:    vtkSplitField.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.

=========================================================================*/
#ifndef vtkSplitField_h
#define vtkSplitField_h

#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkDataSetAlgorithm.h"

#include "vtkDataSetAttributes.h" // Needed for NUM_ATTRIBUTES

class vtkFieldData;

class VTKFILTERSGENERAL_EXPORT vtkSplitField : public vtkDataSetAlgorithm
{
public:
  vtkTypeMacro(vtkSplitField,vtkDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;

  static vtkSplitField *New();

  void SetInputField(int attributeType, int fieldLoc);

  void SetInputField(const char* name, int fieldLoc);

  void SetInputField(const char* name, const char* fieldLoc);

  void Split(int component, const char* arrayName);

  enum FieldLocations
  {
    DATA_OBJECT=0,
    POINT_DATA=1,
    CELL_DATA=2
  };

  struct Component
  {
    int Index;
    char* FieldName;
    Component* Next;   // linked list
    void SetName(const char* name)
    {
        delete[] this->FieldName;
        this->FieldName = 0;
        if (name)
        {
          size_t len = strlen(name)+1;
          this->FieldName = new char[len];
          strncpy(this->FieldName, name, len);
        }
    }
    Component() { FieldName = 0; }
    ~Component() { delete[] FieldName; }
  };

protected:

  enum FieldTypes
  {
    NAME,
    ATTRIBUTE
  };

  vtkSplitField();
  ~vtkSplitField() VTK_OVERRIDE;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE;

  char* FieldName;
  int FieldType;
  int AttributeType;
  int FieldLocation;

  static char FieldLocationNames[3][12];
  static char AttributeNames[vtkDataSetAttributes::NUM_ATTRIBUTES][10];

  vtkDataArray* SplitArray(vtkDataArray* da, int component);


  // Components are stored as a linked list.
  Component* Head;
  Component* Tail;

  // Methods to browse/modify the linked list.
  Component* GetNextComponent(Component* op)
    { return op->Next; }
  Component* GetFirst()
    { return this->Head; }
  void AddComponent(Component* op);
  Component* FindComponent(int index);
  void DeleteAllComponents();

  void PrintComponent(Component* op, ostream& os, vtkIndent indent);
  void PrintAllComponents(ostream& os, vtkIndent indent);
private:
  vtkSplitField(const vtkSplitField&) VTK_DELETE_FUNCTION;
  void operator=(const vtkSplitField&) VTK_DELETE_FUNCTION;
};

#endif