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/*=========================================================================
Program: Visualization Toolkit
Module: AMRCommon.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 AMRCommon.h -- Encapsulates common functionality for AMR data.
//
// .SECTION Description
// This header encapsulates some common functionality for AMR data to
// simplify and expedite the development of examples.
#ifndef AMRCOMMON_H_
#define AMRCOMMON_H_
#include <cassert> // For C++ assert
#include <sstream> // For C++ string streams
#include "vtkCell.h"
#include "vtkCompositeDataWriter.h"
#include "vtkHierarchicalBoxDataSet.h"
#include "vtkImageToStructuredGrid.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkOverlappingAMR.h"
#include "vtkStructuredGridWriter.h"
#include "vtkUniformGrid.h"
#include "vtkUniformGrid.h"
#include "vtkXMLHierarchicalBoxDataReader.h"
#include "vtkXMLImageDataWriter.h"
#include "vtkXMLMultiBlockDataWriter.h"
#include "vtkXMLUniformGridAMRWriter.h"
namespace AMRCommon {
//------------------------------------------------------------------------------
// Description:
// Writes a uniform grid as a structure grid
void WriteUniformGrid( vtkUniformGrid *g, const std::string &prefix )
{
assert( "pre: Uniform grid (g) is NULL!" && (g != NULL) );
vtkXMLImageDataWriter *imgWriter = vtkXMLImageDataWriter::New();
std::ostringstream oss;
oss << prefix << "." << imgWriter->GetDefaultFileExtension();
imgWriter->SetFileName( oss.str().c_str() );
imgWriter->SetInputData( g );
imgWriter->Write();
imgWriter->Delete();
}
//------------------------------------------------------------------------------
// Description:
// Writes the given AMR dataset to a *.vth file with the given prefix.
void WriteAMRData( vtkOverlappingAMR *amrData, const std::string &prefix )
{
// Sanity check
assert( "pre: AMR dataset is NULL!" && (amrData != NULL) );
vtkCompositeDataWriter *writer = vtkCompositeDataWriter::New();
std::ostringstream oss;
oss << prefix << ".vthb";
writer->SetFileName(oss.str().c_str());
writer->SetInputData(amrData);
writer->Write();
writer->Delete();
}
//------------------------------------------------------------------------------
// Description:
// Reads AMR data to the given data-structure from the prescribed file.
vtkHierarchicalBoxDataSet* ReadAMRData( const std::string &file )
{
// Sanity check
// assert( "pre: AMR dataset is NULL!" && (amrData != NULL) );
vtkXMLHierarchicalBoxDataReader *myAMRReader=
vtkXMLHierarchicalBoxDataReader::New();
assert( "pre: AMR Reader is NULL!" && (myAMRReader != NULL) );
std::ostringstream oss;
oss.str("");
oss.clear();
oss << file << ".vthb";
std::cout << "Reading AMR Data from: " << oss.str() << std::endl;
std::cout.flush();
myAMRReader->SetFileName( oss.str().c_str() );
myAMRReader->Update();
vtkHierarchicalBoxDataSet *amrData =
vtkHierarchicalBoxDataSet::SafeDownCast( myAMRReader->GetOutput() );
assert( "post: AMR data read is NULL!" && (amrData != NULL) );
return( amrData );
}
//------------------------------------------------------------------------------
// Description:
// Writes the given multi-block data to an XML file with the prescribed prefix
void WriteMultiBlockData( vtkMultiBlockDataSet *mbds, const std::string &prefix )
{
// Sanity check
assert( "pre: Multi-block dataset is NULL" && (mbds != NULL) );
vtkXMLMultiBlockDataWriter *writer = vtkXMLMultiBlockDataWriter::New();
std::ostringstream oss;
oss.str(""); oss.clear();
oss << prefix << "." << writer->GetDefaultFileExtension();
writer->SetFileName( oss.str( ).c_str( ) );
writer->SetInputData( mbds );
writer->Write();
writer->Delete();
}
//------------------------------------------------------------------------------
// Constructs a uniform grid instance given the prescribed
// origin, grid spacing and dimensions.
vtkUniformGrid* GetGrid( double* origin,double* h,int* ndim )
{
vtkUniformGrid *grd = vtkUniformGrid::New();
grd->Initialize();
grd->SetOrigin( origin );
grd->SetSpacing( h );
grd->SetDimensions( ndim );
return grd;
}
//------------------------------------------------------------------------------
// Computes the cell center for the cell corresponding to cellIdx w.r.t.
// the given grid. The cell center is stored in the supplied buffer c.
void ComputeCellCenter( vtkUniformGrid *grid, const int cellIdx, double c[3] )
{
assert( "pre: grid != NULL" && (grid != NULL) );
assert( "pre: Null cell center buffer" && (c != NULL) );
assert( "pre: cellIdx in bounds" &&
(cellIdx >= 0) && (cellIdx < grid->GetNumberOfCells() ) );
vtkCell *myCell = grid->GetCell( cellIdx );
assert( "post: cell is NULL" && (myCell != NULL) );
double pCenter[3];
double *weights = new double[ myCell->GetNumberOfPoints() ];
int subId = myCell->GetParametricCenter( pCenter );
myCell->EvaluateLocation( subId,pCenter,c,weights );
delete [] weights;
}
} // END namespace
#endif /* AMRCOMMON_H_ */
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