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/*=========================================================================
Program: Visualization Toolkit
Module: Generate2DAMRDataSetWithPulse.cxx
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 Generate2DAMRDataSetWithPulse.cxx -- Generates sample 2-D AMR dataset
//
// .SECTION Description
// This utility code generates a simple 2D AMR dataset with a gaussian
// pulse at the center. The resulting AMR dataset is written using the
// vtkXMLHierarchicalBoxDataSetWriter.
//disable linking warning due to inclusion of vtkXML*
#if defined(_MSC_VER)
# pragma warning (disable: 4089)
#endif
#include <iostream>
#include <cmath>
#include <sstream>
#include <cassert>
#include "vtkAMRUtilities.h"
#include "vtkCell.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkDoubleArray.h"
#include "vtkOverlappingAMR.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkUniformGrid.h"
#include "vtkAMRBox.h"
#include "AMRCommon.h"
static struct PulseAttributes {
double origin[3]; // xyz for the center of the pulse
double width[3]; // the width of the pulse
double amplitude; // the amplitude of the pulse
} Pulse;
//
// Function prototype declarations
//
// Description:
// Sets the pulse attributes
void SetPulse();
// Description:
// Constructs the vtkHierarchicalBoxDataSet.
vtkOverlappingAMR* GetAMRDataSet();
// Description:
// Attaches the pulse to the given grid.
void AttachPulseToGrid( vtkUniformGrid *grid );
//
// Program main
//
int main( int argc, char **argv )
{
// Fix compiler warning for unused variables
static_cast<void>(argc);
static_cast<void>(argv);
// STEP 0: Initialize gaussian pulse parameters
SetPulse();
// STEP 1: Get the AMR dataset
vtkOverlappingAMR *amrDataSet = GetAMRDataSet();
assert( "pre: NULL AMR dataset" && ( amrDataSet != NULL ) );
AMRCommon::WriteAMRData( amrDataSet, "Gaussian2D" );
amrDataSet->Delete();
return 0;
}
//=============================================================================
// Function Prototype Implementation
//=============================================================================
void SetPulse()
{
Pulse.origin[0] = Pulse.origin[1] = Pulse.origin[2] = -1.0;
Pulse.width[0] = Pulse.width[1] = Pulse.width[2] = 6.0;
Pulse.amplitude = 0.0001;
}
//------------------------------------------------------------------------------
void AttachPulseToGrid( vtkUniformGrid *grid )
{
assert( "pre: grid is NULL!" && (grid != NULL) );
vtkDoubleArray* xyz = vtkDoubleArray::New( );
xyz->SetName( "GaussianPulse" );
xyz->SetNumberOfComponents( 1 );
xyz->SetNumberOfTuples( grid->GetNumberOfCells() );
for(int cellIdx=0; cellIdx < grid->GetNumberOfCells(); ++cellIdx )
{
double center[3];
AMRCommon::ComputeCellCenter( grid, cellIdx, center );
double r = 0.0;
for( int i=0; i < 2; ++i )
{
double dx = center[i]-Pulse.origin[i];
r += (dx*dx) / (Pulse.width[i]*Pulse.width[i]);
}
double f = Pulse.amplitude*std::exp( -r );
xyz->SetTuple1( cellIdx, f );
} // END for all cells
grid->GetCellData()->AddArray( xyz );
xyz->Delete();
}
//------------------------------------------------------------------------------
vtkOverlappingAMR* GetAMRDataSet()
{
int NumLevels = 2;
int BlocksPerLevel[2] = {1,2};
double origin[3];
origin[0] = origin[1] = -2.0; origin[2] = 0.0;
vtkOverlappingAMR *data = vtkOverlappingAMR::New();
data->Initialize(NumLevels,BlocksPerLevel);
data->SetOrigin(origin);
data->SetGridDescription(VTK_XY_PLANE);
double h[3];
int ndim[3];
// Root Block -- Block 0,0
ndim[0] = 6; ndim[1] = 5; ndim[2] = 1;
h[0] = h[1] = h[2] = 1.0;
int blockId = 0;
int level = 0;
vtkUniformGrid *root = AMRCommon::GetGrid(origin, h, ndim);
vtkAMRBox box(origin, ndim, h, data->GetOrigin(), data->GetGridDescription());
AttachPulseToGrid( root );
data->SetSpacing(level,h);
data->SetAMRBox( level,blockId,box);
data->SetDataSet(level,blockId,root);
root->Delete();
// Block 1,0
ndim[0] = ndim[1] = 9; ndim[2] = 1;
h[0] = h[1] = h[2] = 0.25;
origin[0] = origin[1] = -2.0; origin[2] = 0.0;
blockId = 0;
level = 1;
vtkUniformGrid *grid1 = AMRCommon::GetGrid(origin, h, ndim);
vtkAMRBox box1(origin, ndim, h, data->GetOrigin(), data->GetGridDescription());
AttachPulseToGrid( grid1 );
data->SetSpacing(level,h);
data->SetAMRBox( level,blockId,box1);
data->SetDataSet( level, blockId,grid1);
grid1->Delete();
// Block 1,1
ndim[0] = ndim[1] = 9; ndim[2] = 1;
h[0] = h[1] = h[2] = 0.25;
origin[0] = 1.0; origin[1] = origin[2] = 0.0;
blockId = 1;
level = 1;
vtkUniformGrid *grid3 = AMRCommon::GetGrid(origin, h, ndim);
vtkAMRBox box3(origin, ndim, h, data->GetOrigin(), data->GetGridDescription());
AttachPulseToGrid( grid3 );
data->SetSpacing(level,h);
data->SetAMRBox(level,blockId,box3);
data->SetDataSet( level, blockId,grid3);
grid3->Delete();
vtkAMRUtilities::BlankCells(data);
data->Audit();
return( data );
}
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