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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkUGFacetReader.h,v $

  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.

=========================================================================*/
// .NAME vtkUGFacetReader - read EDS Unigraphics facet files
// .SECTION Description
// vtkUGFacetReader is a source object that reads Unigraphics facet files.
// Unigraphics is a solid modeling system; facet files are the polygonal
// plot files it uses to create 3D plots.

#ifndef __vtkUGFacetReader_h
#define __vtkUGFacetReader_h

#include "vtkPolyDataAlgorithm.h"

class vtkPointLocator;
class vtkShortArray;

class VTK_IO_EXPORT vtkUGFacetReader : public vtkPolyDataAlgorithm 
{
public:
  vtkTypeRevisionMacro(vtkUGFacetReader,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Construct object to extract all parts, and with point merging
  // turned on.
  static vtkUGFacetReader *New();

  // Description:
  // Overload standard modified time function. If locator is modified,
  // then this object is modified as well.
  unsigned long GetMTime();

  // Description:
  // Specify Unigraphics file name.
  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);

  // Description:
  // Special methods for interrogating the data file.
  int GetNumberOfParts();

  // Description:
  // Retrieve color index for the parts in the file.
  short GetPartColorIndex(int partId);

  // Description:
  // Specify the desired part to extract. The part number must range between
  // [0,NumberOfParts-1]. If the value is =(-1), then all parts will be 
  // extracted. If the value is <(-1), then no parts will be  extracted but 
  // the part colors will be updated.
  vtkSetMacro(PartNumber,int);
  vtkGetMacro(PartNumber,int);

  // Description:
  // Turn on/off merging of points/triangles.
  vtkSetMacro(Merging,int);
  vtkGetMacro(Merging,int);
  vtkBooleanMacro(Merging,int);
  
  // Description:
  // Specify a spatial locator for merging points. By
  // default an instance of vtkMergePoints is used.
  void SetLocator(vtkPointLocator *locator);
  vtkGetObjectMacro(Locator,vtkPointLocator);

  // Description:
  // Create default locator. Used to create one when none is specified.
  void CreateDefaultLocator();

protected:
  vtkUGFacetReader();
  ~vtkUGFacetReader();

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

  char *FileName;
  vtkShortArray *PartColors;
  int PartNumber;
  int Merging;
  vtkPointLocator *Locator;
private:
  vtkUGFacetReader(const vtkUGFacetReader&);  // Not implemented.
  void operator=(const vtkUGFacetReader&);  // Not implemented.
};

#endif
