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

  Program:   Visualization Toolkit
  Module:    vtkDataObjectToDataSetFilter.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   vtkDataObjectToDataSetFilter
 * @brief   map field data to concrete dataset
 *
 * vtkDataObjectToDataSetFilter is an class that maps a data object (i.e., a field)
 * into a concrete dataset, i.e., gives structure to the field by defining a
 * geometry and topology.
 *
 * To use this filter you associate components in the input field data with
 * portions of the output dataset. (A component is an array of values from
 * the field.) For example, you would specify x-y-z points by assigning
 * components from the field for the x, then y, then z values of the points.
 * You may also have to specify component ranges (for each z-y-z) to make
 * sure that the number of x, y, and z values is the same. Also, you may
 * want to normalize the components which helps distribute the data
 * uniformly. Once you've setup the filter to combine all the pieces of
 * data into a specified dataset (the geometry, topology, point and cell
 * data attributes), the various output methods (e.g., GetPolyData()) are
 * used to retrieve the final product.
 *
 * This filter is often used in conjunction with
 * vtkFieldDataToAttributeDataFilter.  vtkFieldDataToAttributeDataFilter
 * takes field data and transforms it into attribute data (e.g., point and
 * cell data attributes such as scalars and vectors).  To do this, use this
 * filter which constructs a concrete dataset and passes the input data
 * object field data to its output. and then use
 * vtkFieldDataToAttributeDataFilter to generate the attribute data associated
 * with the dataset.
 *
 * @warning
 * Make sure that the data you extract is consistent. That is, if you have N
 * points, extract N x, y, and z components. Also, all the information
 * necessary to define a dataset must be given. For example, vtkPolyData
 * requires points at a minimum; vtkStructuredPoints requires setting the
 * dimensions; vtkStructuredGrid requires defining points and dimensions;
 * vtkUnstructuredGrid requires setting points; and vtkRectilinearGrid
 * requires that you define the x, y, and z-coordinate arrays (by specifying
 * points) as well as the dimensions.
 *
 * @warning
 * If you wish to create a dataset of just points (i.e., unstructured points
 * dataset), create vtkPolyData consisting of points. There will be no cells
 * in such a dataset.
 *
 * @sa
 * vtkDataObject vtkFieldData vtkDataSet vtkPolyData vtkStructuredPoints
 * vtkStructuredGrid vtkUnstructuredGrid vtkRectilinearGrid
 * vtkDataSetAttributes vtkDataArray
*/

#ifndef vtkDataObjectToDataSetFilter_h
#define vtkDataObjectToDataSetFilter_h

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

class vtkCellArray;
class vtkDataArray;
class vtkDataSet;
class vtkPointSet;
class vtkPolyData;
class vtkRectilinearGrid;
class vtkStructuredGrid;
class vtkStructuredPoints;
class vtkUnstructuredGrid;

class VTKFILTERSCORE_EXPORT vtkDataObjectToDataSetFilter : public vtkDataSetAlgorithm
{
public:
  static vtkDataObjectToDataSetFilter *New();
  vtkTypeMacro(vtkDataObjectToDataSetFilter,vtkDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Get the input to the filter.
   */
  vtkDataObject *GetInput();

  //@{
  /**
   * Control what type of data is generated for output.
   */
  void SetDataSetType(int);
  vtkGetMacro(DataSetType,int);
  void SetDataSetTypeToPolyData() {
    this->SetDataSetType(VTK_POLY_DATA);};
  void SetDataSetTypeToStructuredPoints() {
    this->SetDataSetType(VTK_STRUCTURED_POINTS);};
  void SetDataSetTypeToStructuredGrid() {
    this->SetDataSetType(VTK_STRUCTURED_GRID);};
  void SetDataSetTypeToRectilinearGrid() {
    this->SetDataSetType(VTK_RECTILINEAR_GRID);};
  void SetDataSetTypeToUnstructuredGrid() {
    this->SetDataSetType(VTK_UNSTRUCTURED_GRID);};
  //@}

  //@{
  /**
   * Get the output in different forms. The particular method invoked
   * should be consistent with the SetDataSetType() method. (Note:
   * GetOutput() will always return a type consistent with
   * SetDataSetType(). Also, GetOutput() will return nullptr if the filter
   * aborted due to inconsistent data.)
   */
  vtkDataSet *GetOutput();
  vtkDataSet *GetOutput(int idx);
  vtkPolyData *GetPolyDataOutput();
  vtkStructuredPoints *GetStructuredPointsOutput();
  vtkStructuredGrid *GetStructuredGridOutput();
  vtkUnstructuredGrid *GetUnstructuredGridOutput();
  vtkRectilinearGrid *GetRectilinearGridOutput();
  //@}

  //@{
  /**
   * Define the component of the field to be used for the x, y, and z values
   * of the points. Note that the parameter comp must lie between (0,2) and
   * refers to the x-y-z (i.e., 0,1,2) components of the points. To define
   * the field component to use you can specify an array name and the
   * component in that array. The (min,max) values are the range of data in
   * the component you wish to extract. (This method should be used for
   * vtkPolyData, vtkUnstructuredGrid, vtkStructuredGrid, and
   * vtkRectilinearGrid.) A convenience method, SetPointComponent(),is also
   * provided which does not require setting the (min,max) component range or
   * the normalize flag (normalize is set to DefaulatNormalize value).
   */
  void SetPointComponent(int comp, const char *arrayName, int arrayComp,
                         int min, int max, int normalize);
  void SetPointComponent(int comp, const char *arrayName, int arrayComp)
    {this->SetPointComponent(comp, arrayName, arrayComp, -1, -1, this->DefaultNormalize);};
  const char *GetPointComponentArrayName(int comp);
  int GetPointComponentArrayComponent(int comp);
  int GetPointComponentMinRange(int comp);
  int GetPointComponentMaxRange(int comp);
  int GetPointComponentNormailzeFlag(int comp);
  //@}

  //@{
  /**
   * Define cell connectivity when creating vtkPolyData. You can define
   * vertices, lines, polygons, and/or triangle strips via these methods.
   * These methods are similar to those for defining points, except
   * that no normalization of the data is possible. Basically, you need to
   * define an array of values that (for each cell) includes the number of
   * points per cell, and then the cell connectivity. (This is the vtk file
   * format described in in the textbook or User's Guide.)
   */
  void SetVertsComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetVertsComponent(const char *arrayName, int arrayComp)
    {this->SetVertsComponent(arrayName, arrayComp, -1, -1);};
  const char *GetVertsComponentArrayName();
  int GetVertsComponentArrayComponent();
  int GetVertsComponentMinRange();
  int GetVertsComponentMaxRange();
  void SetLinesComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetLinesComponent(const char *arrayName, int arrayComp)
    {this->SetLinesComponent(arrayName, arrayComp, -1, -1);};
  const char *GetLinesComponentArrayName();
  int GetLinesComponentArrayComponent();
  int GetLinesComponentMinRange();
  int GetLinesComponentMaxRange();
  void SetPolysComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetPolysComponent(const char *arrayName, int arrayComp)
    {this->SetPolysComponent(arrayName, arrayComp, -1, -1);};
  const char *GetPolysComponentArrayName();
  int GetPolysComponentArrayComponent();
  int GetPolysComponentMinRange();
  int GetPolysComponentMaxRange();
  void SetStripsComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetStripsComponent(const char *arrayName, int arrayComp)
    {this->SetStripsComponent(arrayName, arrayComp, -1, -1);};
  const char *GetStripsComponentArrayName();
  int GetStripsComponentArrayComponent();
  int GetStripsComponentMinRange();
  int GetStripsComponentMaxRange();
  //@}

  //@{
  /**
   * Define cell types and cell connectivity when creating unstructured grid
   * data.  These methods are similar to those for defining points, except
   * that no normalization of the data is possible. Basically, you need to
   * define an array of cell types (an integer value per cell), and another
   * array consisting (for each cell) of a number of points per cell, and
   * then the cell connectivity. (This is the vtk file format described in
   * in the textbook or User's Guide.)
   */
  void SetCellTypeComponent(const char *arrayName, int arrayComp,
                            int min, int max);
  void SetCellTypeComponent(const char *arrayName, int arrayComp)
    {this->SetCellTypeComponent(arrayName, arrayComp, -1, -1);};
  const char *GetCellTypeComponentArrayName();
  int GetCellTypeComponentArrayComponent();
  int GetCellTypeComponentMinRange();
  int GetCellTypeComponentMaxRange();
  void SetCellConnectivityComponent(const char *arrayName, int arrayComp,
                                    int min, int max);
  void SetCellConnectivityComponent(const char *arrayName, int arrayComp)
    {this->SetCellConnectivityComponent(arrayName, arrayComp, -1, -1);};
  const char *GetCellConnectivityComponentArrayName();
  int GetCellConnectivityComponentArrayComponent();
  int GetCellConnectivityComponentMinRange();
  int GetCellConnectivityComponentMaxRange();
  //@}

  //@{
  /**
   * Set the default Normalize() flag for those methods setting a default
   * Normalize value (e.g., SetPointComponent).
   */
  vtkSetMacro(DefaultNormalize,vtkTypeBool);
  vtkGetMacro(DefaultNormalize,vtkTypeBool);
  vtkBooleanMacro(DefaultNormalize,vtkTypeBool);
  //@}

  //@{
  /**
   * Specify the dimensions to use if generating a dataset that requires
   * dimensions specification (vtkStructuredPoints, vtkStructuredGrid,
   * vtkRectilinearGrid).
   */
  vtkSetVector3Macro(Dimensions,int);
  vtkGetVectorMacro(Dimensions,int,3);
  //@}

  //@{
  /**
   * Specify the origin to use if generating a dataset whose origin
   * can be set (i.e., a vtkStructuredPoints dataset).
   */
  vtkSetVector3Macro(Origin,double);
  vtkGetVectorMacro(Origin,double,3);
  //@}

  //@{
  /**
   * Specify the spacing to use if generating a dataset whose spacing
   * can be set (i.e., a vtkStructuredPoints dataset).
   */
  vtkSetVector3Macro(Spacing,double);
  vtkGetVectorMacro(Spacing,double,3);
  //@}

  //@{
  /**
   * Alternative methods to specify the dimensions, spacing, and origin for those
   * datasets requiring this information. You need to specify the name of an array;
   * the component of the array, and the range of the array (min,max). These methods
   * will override the information given by the previous methods.
   */
  void SetDimensionsComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetDimensionsComponent(const char *arrayName, int arrayComp)
    {this->SetDimensionsComponent(arrayName, arrayComp, -1, -1);};
  void SetSpacingComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetSpacingComponent(const char *arrayName, int arrayComp)
    {this->SetSpacingComponent(arrayName, arrayComp, -1, -1);};
  void SetOriginComponent(const char *arrayName, int arrayComp, int min, int max);
  void SetOriginComponent(const char *arrayName, int arrayComp)
    {this->SetOriginComponent(arrayName, arrayComp, -1, -1);};
  //@}

protected:
  vtkDataObjectToDataSetFilter();
  ~vtkDataObjectToDataSetFilter() override;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override; //generate output data
  int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;
  int RequestUpdateExtent(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;
  int FillInputPortInformation(int port, vtkInformation *info) override;
  int RequestDataObject(vtkInformation *, vtkInformationVector **,
                                vtkInformationVector *) override;

  char Updating;

  // control flags used to generate the output dataset
  int DataSetType; //the type of dataset to generate

  // Support definition of points
  char *PointArrays[3]; //the name of the arrays
  int PointArrayComponents[3]; //the array components used for x-y-z
  vtkIdType PointComponentRange[3][2]; //the range of the components to use
  int PointNormalize[3]; //flags control normalization

  // These define cells for vtkPolyData
  char *VertsArray; //the name of the array
  int VertsArrayComponent; //the array component
  vtkIdType VertsComponentRange[2]; //the range of the components to use

  char *LinesArray; //the name of the array
  int LinesArrayComponent; //the array component used for cell types
  vtkIdType LinesComponentRange[2]; //the range of the components to use

  char *PolysArray; //the name of the array
  int PolysArrayComponent; //the array component
  vtkIdType PolysComponentRange[2]; //the range of the components to use

  char *StripsArray; //the name of the array
  int StripsArrayComponent; //the array component
  vtkIdType StripsComponentRange[2]; //the range of the components to use

  // Used to define vtkUnstructuredGrid datasets
  char *CellTypeArray; //the name of the array
  int CellTypeArrayComponent; //the array component used for cell types
  vtkIdType CellTypeComponentRange[2]; //the range of the components to use

  char *CellConnectivityArray; //the name of the array
  int CellConnectivityArrayComponent; //the array components used for cell connectivity
  vtkIdType CellConnectivityComponentRange[2]; //the range of the components to use

  // helper methods (and attributes) to construct datasets
  void SetArrayName(char* &name, char *newName);
  vtkIdType ConstructPoints(vtkDataObject *input, vtkPointSet *ps);
  vtkIdType ConstructPoints(vtkDataObject *input, vtkRectilinearGrid *rg);
  int ConstructCells(vtkDataObject *input, vtkPolyData *pd);
  int ConstructCells(vtkDataObject *input, vtkUnstructuredGrid *ug);
  vtkCellArray *ConstructCellArray(vtkDataArray *da, int comp,
                                   vtkIdType compRange[2]);

  // Default value for normalization
  vtkTypeBool DefaultNormalize;

  // Couple of different ways to specify dimensions, spacing, and origin.
  int Dimensions[3];
  double Origin[3];
  double Spacing[3];

  char *DimensionsArray; //the name of the array
  int DimensionsArrayComponent; //the component of the array used for dimensions
  vtkIdType DimensionsComponentRange[2]; //the ComponentRange of the array for the dimensions

  char *OriginArray; //the name of the array
  int OriginArrayComponent; //the component of the array used for Origins
  vtkIdType OriginComponentRange[2]; //the ComponentRange of the array for the Origins

  char *SpacingArray; //the name of the array
  int SpacingArrayComponent; //the component of the array used for Spacings
  vtkIdType SpacingComponentRange[2]; //the ComponentRange of the array for the Spacings

  void ConstructDimensions(vtkDataObject *input);
  void ConstructSpacing(vtkDataObject *input);
  void ConstructOrigin(vtkDataObject *input);

private:
  vtkDataObjectToDataSetFilter(const vtkDataObjectToDataSetFilter&) = delete;
  void operator=(const vtkDataObjectToDataSetFilter&) = delete;
};

#endif