/*
   ____    _ __           ____               __    ____
  / __/___(_) /  ___ ____/ __ \__ _____ ___ / /_  /  _/__  ____
 _\ \/ __/ / _ \/ -_) __/ /_/ / // / -_|_-</ __/ _/ // _ \/ __/
/___/\__/_/_.__/\__/_/  \___\_\_,_/\__/___/\__/ /___/_//_/\__(_)

Copyright 2012 SciberQuest Inc.
*/
#ifndef __vtkSQPlaneSourceCellGenerator_h
#define __vtkSQPlaneSourceCellGenerator_h

#include "vtkSQCellGenerator.h"
#include "vtkCellType.h"

/// A plane source that provide data on demand
/**
Given a cell id the source provides corresponding
cell points and indexes (globally unique ids).
*/
class VTK_EXPORT vtkSQPlaneSourceCellGenerator : public vtkSQCellGenerator
{
public:
  static vtkSQPlaneSourceCellGenerator *New();
  void PrintSelf(ostream& os, vtkIndent indent);
  vtkTypeMacro(vtkSQPlaneSourceCellGenerator, vtkObject);

  /**
  Return the total number of cells available.
  */
  virtual vtkIdType GetNumberOfCells()
    {
    return this->Resolution[0]*this->Resolution[1];
    }

  /**
  Return the cell type of the cell at id.
  */
  virtual int GetCellType(vtkIdType){ return VTK_POLYGON; }

  /**
  Return the number of points required for the named
  cell. For homogeneous datasets its always the same.
  */
  virtual int GetNumberOfCellPoints(vtkIdType){ return 4;}

  /**
  Copy the points from a cell into the provided buffer,
  buffer is expected to be large enough. Return the number
  of points coppied.
  */
  virtual int GetCellPoints(vtkIdType cid, float *pts);

  /**
  Copy the point's indexes into the provided bufffer,
  buffer is expected to be large enough. Return the
  number of points coppied. The index is unique across
  all processes but is not the same as the point id
  in a VTK dataset.
  */
  virtual int GetCellPointIndexes(vtkIdType cid, vtkIdType *idx);

  /**
  Copy the texture coordinates from a cell into the provided
  buffer. buffer is expected to be large enough. return the
  number of tcoords coppied.
  */
  int GetCellTextureCoordinates(vtkIdType cid, float *pts);

  /**
  Set/Get plane cell resolution.
  */
  void SetResolution(int *r);
  void SetResolution(int rx, int ry);
  vtkGetVector2Macro(Resolution,int);
  /**
  Set/Get plane coordinates, origin,point1,point2.
  */
  void SetOrigin(double *o);
  void SetOrigin(double x, double y, double z);
  vtkGetVector3Macro(Origin,double);

  void SetPoint1(double *o);
  void SetPoint1(double x, double y, double z);
  vtkGetVector3Macro(Point1,double);

  void SetPoint2(double *o);
  void SetPoint2(double x, double y, double z);
  vtkGetVector3Macro(Point2,double);

  /**
  Call this after any change to coordinates and resolution.
  */
  void ComputeDeltas();

protected:
  vtkSQPlaneSourceCellGenerator();
  virtual ~vtkSQPlaneSourceCellGenerator(){};

private:
  int Resolution[3];
  double Origin[3];
  double Point1[3];
  double Point2[3];
  double Dx[3];
  double Dy[3];
};

#endif
