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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2006 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: ScalarFunctionReaderVTK.cpp,v 1.3 2007/06/10 15:03:07 delpinux Exp $
#include <ScalarFunctionReaderVTK.hpp>
#include <ScalarFunctionBase.hpp>
#include <ErrorHandler.hpp>
#include <Mesh.hpp>
#include <Structured3DMesh.hpp>
#include <DiscretizationType.hpp>
#include <Vector.hpp>
#include <FEMFunctionBase.hpp>
#include <FEMFunctionBuilder.hpp>
#include <XMLFileReader.hpp>
#include <XMLTree.hpp>
#include <XMLContentPosition.hpp>
#include <fstream>
ConstReferenceCounting<ScalarFunctionBase>
ScalarFunctionReaderVTK::
getFunction() const
{
ffout(3) << "Reading file '" << __filename << "'\n";
std::ifstream fin(__filename.c_str());
if (not(fin)) {
throw ErrorHandler(__FILE__,__LINE__,
"error: cannot open file '"+__filename+"'",
ErrorHandler::normal);
}
XMLFileReader::instance().read(__filename);
const XMLTree& xmlTree = * XMLFileReader::instance().xmlTree();
xmlTree.check();
// getting file type
ReferenceCounting<XMLTag> vtkfile = xmlTree.findTag(">VTKFile");
ReferenceCounting<XMLAttribute> filetype = vtkfile->findAttribute("type");
ffout(3) << " - file type is '" << filetype->value() << "'\n";
Vector<real_t> v;
size_t numberOfCells = 0;
size_t numberOfPoints = 0;
size_t numberOfComponents = 0;
if (filetype->value() == "UnstructuredGrid") {
ReferenceCounting<XMLTag> piece = xmlTree.findTag(">VTKFile>UnstructuredGrid>Piece");
// getting number of cells
{
ReferenceCounting<XMLAttribute> attribute = piece->findAttribute("NumberOfCells");
std::istringstream is(attribute->value());
is >> numberOfCells;
}
{
ReferenceCounting<XMLAttribute> attribute = piece->findAttribute("NumberOfPoints");
std::istringstream is(attribute->value());
is >> numberOfPoints;
}
} else if (filetype->value() == "ImageData") {
ReferenceCounting<XMLTag> piece = xmlTree.findTag(">VTKFile>ImageData>Piece");
// getting number of cells
{
ReferenceCounting<XMLAttribute> attribute = piece->findAttribute("Extent");
std::istringstream is(attribute->value());
TinyVector<3,size_t> extent0;
TinyVector<3,size_t> extent1;
is >> extent0[0] >> extent1[0] >> extent0[1] >> extent1[1] >> extent0[2] >> extent1[2];
numberOfCells = (extent1[0]-extent0[0])*(extent1[1]-extent0[1])*(extent1[2]-extent0[2]);
numberOfPoints = (1+extent1[0]-extent0[0])*(1+extent1[1]-extent0[1])*(1+extent1[2]-extent0[2]);
}
} else {
throw ErrorHandler(__FILE__,__LINE__,
"cannot read filetype '"+filetype->value()+"'",
ErrorHandler::unexpected);
}
if ((numberOfPoints != __mesh->numberOfVertices()) or
(numberOfCells != __mesh->numberOfCells())) {
throw ErrorHandler(__FILE__,__LINE__,
"mesh in file '"+__filename+"' is different from 'read' argument",
ErrorHandler::normal);
}
ReferenceCounting<XMLTag> dataArray = 0;
// looking for point data field
if (xmlTree.hasTag(">VTKFile>"+filetype->value()+">Piece>PointData>DataArray")) {
XMLTree::const_range pointDataRange = xmlTree.findTagRange(">VTKFile>"+filetype->value()+">Piece>PointData>DataArray");
for (XMLTree::TagList::const_iterator iDataArray = pointDataRange.first;
iDataArray != pointDataRange.second; ++iDataArray) {
ReferenceCounting<XMLAttribute> name = iDataArray->second->findAttribute("Name");
if (name->value() == __functionName) {
dataArray = iDataArray->second;
ReferenceCounting<XMLAttribute> components = iDataArray->second->findAttribute("NumberOfComponents");
std::istringstream is(components->value());
is >> numberOfComponents;
break;
}
}
}
if (dataArray == 0) { // looking for array data field
if (xmlTree.hasTag(">VTKFile>"+filetype->value()+">Piece>CellData>DataArray")) {
XMLTree::const_range cellDataRange = xmlTree.findTagRange(">VTKFile>"+filetype->value()+">Piece>CellData>DataArray");
for (XMLTree::TagList::const_iterator iDataArray = cellDataRange.first;
iDataArray != cellDataRange.second; ++iDataArray) {
ReferenceCounting<XMLAttribute> name = iDataArray->second->findAttribute("Name");
if (name->value() == __functionName) {
dataArray = iDataArray->second;
ReferenceCounting<XMLAttribute> components = iDataArray->second->findAttribute("NumberOfComponents");
std::istringstream is(components->value());
is >> numberOfComponents;
break;
}
}
}
}
if (dataArray == 0) {
throw ErrorHandler(__FILE__,__LINE__,
"cannot find field '"+__functionName+"' in '"+__filename+"'",
ErrorHandler::normal);
}
ConstReferenceCounting<XMLContentBase> content = dataArray->content();
if (content == 0) {
throw ErrorHandler(__FILE__,__LINE__,
"cannot find content for '"+__functionName+"' in '"+__filename+"'",
ErrorHandler::normal);
}
if (__componentNumber>=numberOfComponents) {
throw ErrorHandler(__FILE__,__LINE__,
"The function '"+__functionName+"' of the file '"+__filename
+"' does only contain "+stringify(__componentNumber)+" components.\n"
+"Cannot read component number "+stringify(__componentNumber),
ErrorHandler::normal);
}
switch(content->type()) {
case XMLContentBase::filePosition: {
const XMLContentPosition& position = dynamic_cast<const XMLContentPosition&>(*content);
v.resize(numberOfPoints);
fin.seekg(position.position(),std::ios_base::beg);
fin.unget();
switch (__mesh->type()) {
case Mesh::cartesianHexahedraMesh: {
const Structured3DMesh& mesh = dynamic_cast<const Structured3DMesh&>(*__mesh);
Vector<real_t> componentsValue(numberOfComponents);
for (size_t k=0; k<mesh.shape().nz(); ++k) {
for (size_t j=0; j<mesh.shape().ny(); ++j) {
for (size_t i=0; i<mesh.shape().nx(); ++i) {
for (size_t l=0; l<componentsValue.size(); ++l) {
fin >> componentsValue[l];
}
v[mesh.shape()(i,j,k)] = componentsValue[__componentNumber];
}
}
}
break;
}
default: {
Vector<real_t> componentsValue(numberOfComponents);
for (size_t i=0; i<numberOfPoints; ++i) {
for (size_t j=0; j<componentsValue.size(); ++j) {
fin >> componentsValue[j];
}
v[i] = componentsValue[__componentNumber];
}
}
}
break;
}
default: {
throw ErrorHandler(__FILE__,__LINE__,
"Bad content for '"+__functionName+"' in '"+__filename+"'",
ErrorHandler::normal);
}
}
FEMFunctionBuilder builder;
DiscretizationType d(DiscretizationType::lagrangianFEM1);
builder.build(d, __mesh, v);
return builder.getBuiltScalarFunction();
}
ScalarFunctionReaderVTK::
ScalarFunctionReaderVTK(const std::string& filename,
ConstReferenceCounting<Mesh> mesh,
const std::string& functionName,
const int& componentNumber)
: ScalarFunctionReaderBase(filename, mesh, functionName, componentNumber)
{
;
}
ScalarFunctionReaderVTK::
ScalarFunctionReaderVTK(const ScalarFunctionReaderVTK& f)
: ScalarFunctionReaderBase(f)
{
;
}
ScalarFunctionReaderVTK::
~ScalarFunctionReaderVTK()
{
;
}
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