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

  Program:   Visualization Toolkit
  Module:    vtkPCosmoReader.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.

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

  Program:   VTK/ParaView Los Alamos National Laboratory Modules (PVLANL)
  Module:    vtkPCosmoReader.h

Copyright (c) 2009 Los Alamos National Security, LLC

All rights reserved.

Copyright 2009. Los Alamos National Security, LLC.
This software was produced under U.S. Government contract DE-AC52-06NA25396
for Los Alamos National Laboratory (LANL), which is operated by
Los Alamos National Security, LLC for the U.S. Department of Energy.
The U.S. Government has rights to use, reproduce, and distribute this software.
NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC MAKES ANY WARRANTY,
EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE.
If software is modified to produce derivative works, such modified software
should be clearly marked, so as not to confuse it with the version available
from LANL.

Additionally, redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following conditions
are met:
-   Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.
-   Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.
-   Neither the name of Los Alamos National Security, LLC, Los Alamos National
    Laboratory, LANL, the U.S. Government, nor the names of its contributors
    may be used to endorse or promote products derived from this software
    without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY LOS ALAMOS NATIONAL SECURITY, LLC AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL LOS ALAMOS NATIONAL SECURITY, LLC OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkPCosmoReader - Read a binary cosmology data file
//
// .SECTION Description
// vtkPCosmoReader creates a vtkUnstructuredGrid from a binary cosmology file.
//
// A cosmo file is a record format file with no header.
// One record per particle.
//
// Each record is 32 bytes, with fields (in order) for:
//     x_position (float),
//     x_velocity (float),
//     y_position (float),
//     y_velocity (float),
//     z-position (float),
//     z_velocity (float)
//     mass (float)
//     identification tag (int64_t)
//
// Total particle data can be split into per processor files, with each file
// name ending in the processor number.
//

#ifndef __vtkPCosmoReader_h
#define __vtkPCosmoReader_h

#include "vtkUnstructuredGridAlgorithm.h"
#include "vtkPVVTKExtensionsCosmoToolsModule.h" // For export macro

class vtkMultiProcessController;
class vtkStdString;

class VTKPVVTKEXTENSIONSCOSMOTOOLS_EXPORT vtkPCosmoReader :
  public vtkUnstructuredGridAlgorithm
{
public:
  static vtkPCosmoReader *New();
  vtkTypeMacro(vtkPCosmoReader, vtkUnstructuredGridAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Specify the name of the cosmology particle binary file to read
  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);

  // Description:
  // Specify the physical box dimensions size (rL)
  // (default 100.0)
  vtkSetMacro(RL, float);
  vtkGetMacro(RL, float);

  // Description:
  // Specify the ghost cell spacing in Mpc (in rL units)
  // (edge boundary of processor box)
  // (default 5)
  vtkSetMacro(Overlap, float);
  vtkGetMacro(Overlap, float);

  // Description:
  // Set the read mode (0 = one-to-one, 1 = default, round-robin)
  vtkSetMacro(ReadMode, int);
  vtkGetMacro(ReadMode, int);

  // Description:
  // Set whether to byte-swap or not the data. Applicable only to Cosmo format.
  // By default, no byte-swapping is enabled.
  vtkSetMacro(ByteSwap,int);
  vtkGetMacro(ByteSwap,int);

  // Description:
  // Set the filetype to Gadget or Cosmo read mode
  // (0 = Gadget, 1 = default, Cosmo)
  vtkSetMacro(CosmoFormat, int);
  vtkGetMacro(CosmoFormat, int);

  // Description:
  // Set the communicator object for interprocess communication
  vtkGetObjectMacro(Controller, vtkMultiProcessController);
  virtual void SetController(vtkMultiProcessController*);

protected:
  vtkPCosmoReader();
  ~vtkPCosmoReader();

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

  vtkMultiProcessController* Controller;

  char* FileName; // Name of binary particle file
  float RL; // The physical box dimensions (rL)
  float Overlap; // The ghost cell boundary space
  int ReadMode; // The reading mode
  int ByteSwap; // Indicates whether to byte-swap data on read
  int CosmoFormat; // Enable cosmo format or gadget format

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

#endif
