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

  Program:   Visualization Toolkit
  Module:    vtkBridgeDataSet.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.

=========================================================================*/
// .NAME vtkBridgeDataSet - Implementation of vtkGenericDataSet.
// .SECTION Description
// It is just an example that show how to implement the Generic. It is also
// used for testing and evaluating the Generic.

#ifndef __vtkBridgeDataSet_h
#define __vtkBridgeDataSet_h

#include "vtkBridgeExport.h"
#include "vtkGenericDataSet.h"

class vtkDataSet;

class VTK_BRIDGE_EXPORT vtkBridgeDataSet : public vtkGenericDataSet
{
public:
  static vtkBridgeDataSet *New();
  vtkTypeRevisionMacro(vtkBridgeDataSet,vtkGenericDataSet);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Set the dataset that will be manipulated through the adaptor interface.
  // \pre ds_exists: ds!=0
  void SetDataSet(vtkDataSet *ds);
  // Description:
  // Number of points composing the dataset. See NewPointIterator for more
  // details.
  // \post positive_result: result>=0
  vtkIdType GetNumberOfPoints();

  // Description:
  // Number of cells that explicitly define the dataset. See NewCellIterator
  // for more details.
  // \pre valid_dim_range: (dim>=-1) && (dim<=3)
  // \post positive_result: result>=0
  vtkIdType GetNumberOfCells(int dim=-1);

  // Description:
  // Return -1 if the dataset is explicitly defined by cells of several
  // dimensions or if there is no cell. If the dataset is explicitly defined by
  // cells of a unique
  // dimension, return this dimension.
  // \post valid_range: (result>=-1) && (result<=3)
  int GetCellDimension();
  
  // Description:
  // Get a list of types of cells in a dataset. The list consists of an array
  // of types (not necessarily in any order), with a single entry per type.
  // For example a dataset 5 triangles, 3 lines, and 100 hexahedra would
  // result a list of three entries, corresponding to the types VTK_TRIANGLE,
  // VTK_LINE, and VTK_HEXAHEDRON.
  // THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND
  // THE DATASET IS NOT MODIFIED
  // \pre types_exist: types!=0
  void GetCellTypes(vtkCellTypes *types);
  
  // Description:
  // Cells of dimension `dim' (or all dimensions if -1) that explicitly define
  // the dataset. For instance, it will return only tetrahedra if the mesh is
  // defined by tetrahedra. If the mesh is composed of two parts, one with
  // tetrahedra and another part with triangles, it will return both, but will
  // not return edges and vertices.
  // \pre valid_dim_range: (dim>=-1) && (dim<=3)
  // \post result_exists: result!=0
  vtkGenericCellIterator *NewCellIterator(int dim=-1);
  
  // Description:
  // Boundaries of dimension `dim' (or all dimensions if -1) of the dataset.
  // If `exteriorOnly' is true, only  the exterior boundaries of the dataset
  // will be returned, otherwise it will return exterior and interior
  // boundaries.
  // \pre valid_dim_range: (dim>=-1) && (dim<=2)
  // \post result_exists: result!=0
  vtkGenericCellIterator *NewBoundaryIterator(int dim=-1,
                                       int exteriorOnly=0);
  
  // Description:
  // Points composing the dataset; they can be on a vertex or isolated.
  // \post result_exists: result!=0
  vtkGenericPointIterator *NewPointIterator();
  

  // Description:
  // Estimated size needed after tessellation (or special operation)
  vtkIdType GetEstimatedSize();
  
  // Description:
  // Locate closest cell to position `x' (global coordinates) with respect to
  // a tolerance squared `tol2' and an initial guess `cell' (if valid). The
  // result consists in the `cell', the `subId' of the sub-cell (0 if primary
  // cell), the parametric coordinates `pcoord' of the position. It returns
  // whether the position is inside the cell or not. Tolerance is used to
  // control how close the point is to be considered "in" the cell.
  // THIS METHOD IS NOT THREAD SAFE.
  // \pre not_empty: GetNumberOfCells()>0
  // \pre cell_exists: cell!=0
  // \pre positive_tolerance: tol2>0
  int FindCell(double x[3],
               vtkGenericCellIterator* &cell,
               double tol2,
               int &subId,
               double pcoords[3]);
  
  // Description:
  // Locate closest point `p' to position `x' (global coordinates)
  // \pre not_empty: GetNumberOfPoints()>0
  // \pre p_exists: p!=0
  void FindPoint(double x[3],
                 vtkGenericPointIterator *p);
  
  // Description:
  // Datasets are composite objects and need to check each part for MTime.
  unsigned long int GetMTime();
  
  // Description:
  // Compute the geometry bounding box.
  void ComputeBounds();
  
protected:
  // Constructor with default bounds (0,1, 0,1, 0,1).
  vtkBridgeDataSet();
  virtual ~vtkBridgeDataSet();
  
  //BTX
  friend class vtkBridgeCell;
  friend class vtkBridgeCellIterator;
  friend class vtkBridgeCellIteratorOnDataSet;
  friend class vtkBridgeCellIteratorOne;
  friend class vtkBridgePointIterator;
  friend class vtkBridgePointIteratorOnCell;
  friend class vtkBridgePointIteratorOnDataSet;
  friend class vtkBridgePointIteratorOne;
  //ETX
  
  // Description:
  // Compute the number of cells for each dimension and the list of types of
  // cells.
  void ComputeNumberOfCellsAndTypes();
  
  vtkDataSet *Implementation;
  vtkIdType NumberOf0DCells;
  vtkIdType NumberOf1DCells;
  vtkIdType NumberOf2DCells;
  vtkIdType NumberOf3DCells;
  vtkCellTypes *Types;
  vtkTimeStamp ComputeNumberOfCellsTime; // for number of cells and cell types

private:
  vtkBridgeDataSet(const vtkBridgeDataSet&);  // Not implemented.
  void operator=(const vtkBridgeDataSet&);    // Not implemented.
};

#endif
