253 lines
6.8 KiB
C++
253 lines
6.8 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Description
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Plot3d mesh (ascii/formatted format) converter.
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Work in progress! Handles ascii multiblock (and optionally singleBlock)
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format.
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By default expects blanking. Use -noBlank if none.
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Use -2D @a thickness if 2D.
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Niklas Nordin has experienced a problem with lefthandedness of the blocks.
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The code should detect this automatically - see hexBlock::readPoints but
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if this goes wrong just set the blockHandedness_ variable to 'right'
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always.
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "objectRegistry.H"
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#include "foamTime.H"
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#include "IFstream.H"
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#include "hexBlock.H"
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#include "polyMesh.H"
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#include "wallPolyPatch.H"
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#include "symmetryPolyPatch.H"
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#include "preservePatchTypes.H"
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#include "cellShape.H"
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#include "cellModeller.H"
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#include "mergePoints.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::noParallel();
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argList::validArgs.append("PLOT3D geom file");
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argList::validOptions.insert("scale", "scale factor");
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argList::validOptions.insert("noBlank", "");
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argList::validOptions.insert("singleBlock", "");
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argList::validOptions.insert("2D", "thickness");
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argList args(argc, argv);
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if (!args.check())
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{
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FatalError.exit();
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}
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scalar scaleFactor = 1.0;
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args.optionReadIfPresent("scale", scaleFactor);
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bool readBlank = !args.optionFound("noBlank");
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bool singleBlock = args.optionFound("singleBlock");
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scalar twoDThickness = -1;
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if (args.optionReadIfPresent("2D", twoDThickness))
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{
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Info<< "Reading 2D case by extruding points by " << twoDThickness
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<< " in z direction." << nl << endl;
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}
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# include "createTime.H"
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IFstream plot3dFile(args.additionalArgs()[0]);
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// Read the plot3d information using a fixed format reader.
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// Comments in the file are in C++ style, so the stream parser will remove
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// them with no intervention
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label nblock;
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if (singleBlock)
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{
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nblock = 1;
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}
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else
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{
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plot3dFile >> nblock;
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}
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Info<< "Reading " << nblock << " blocks" << endl;
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PtrList<hexBlock> blocks(nblock);
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{
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label nx, ny, nz;
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forAll (blocks, blockI)
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{
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if (twoDThickness > 0)
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{
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// Fake second set of points (done in readPoints below)
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plot3dFile >> nx >> ny;
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nz = 2;
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}
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else
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{
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plot3dFile >> nx >> ny >> nz;
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}
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Info<< "block " << blockI << " nx:" << nx
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<< " ny:" << ny << " nz:" << nz << endl;
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blocks.set(blockI, new hexBlock(nx, ny, nz));
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}
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}
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Info<< "Reading block points" << endl;
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label sumPoints(0);
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label nMeshCells(0);
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forAll (blocks, blockI)
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{
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Info<< "block " << blockI << ":" << nl;
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blocks[blockI].readPoints(readBlank, twoDThickness, plot3dFile);
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sumPoints += blocks[blockI].nBlockPoints();
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nMeshCells += blocks[blockI].nBlockCells();
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Info<< nl;
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}
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pointField points(sumPoints);
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labelList blockOffsets(blocks.size());
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sumPoints = 0;
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forAll (blocks, blockI)
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{
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const pointField& blockPoints = blocks[blockI].points();
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blockOffsets[blockI] = sumPoints;
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forAll (blockPoints, i)
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{
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points[sumPoints++] = blockPoints[i];
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}
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}
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// From old to new master point
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labelList oldToNew;
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pointField newPoints;
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// Merge points
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mergePoints
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(
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points,
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SMALL,
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false,
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oldToNew,
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newPoints
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);
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Info<< "Merged points within " << SMALL << " distance. Merged from "
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<< oldToNew.size() << " down to " << newPoints.size()
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<< " points." << endl;
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// Scale the points
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if (scaleFactor > 1.0 + SMALL || scaleFactor < 1.0 - SMALL)
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{
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newPoints *= scaleFactor;
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}
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Info<< "Creating cells" << endl;
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cellShapeList cellShapes(nMeshCells);
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const cellModel& hex = *(cellModeller::lookup("hex"));
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label nCreatedCells = 0;
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forAll (blocks, blockI)
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{
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labelListList curBlockCells = blocks[blockI].blockCells();
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forAll (curBlockCells, blockCellI)
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{
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labelList cellPoints(curBlockCells[blockCellI].size());
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forAll (cellPoints, pointI)
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{
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cellPoints[pointI] =
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oldToNew
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[
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curBlockCells[blockCellI][pointI]
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+ blockOffsets[blockI]
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];
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}
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// Do automatic collapse from hex.
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cellShapes[nCreatedCells] = cellShape(hex, cellPoints, true);
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nCreatedCells++;
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}
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}
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Info<< "Creating boundary patches" << endl;
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faceListList boundary(0);
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wordList patchNames(0);
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wordList patchTypes(0);
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word defaultFacesName = "defaultFaces";
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word defaultFacesType = wallPolyPatch::typeName;
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wordList patchPhysicalTypes(0);
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polyMesh pShapeMesh
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(
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IOobject
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(
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polyMesh::defaultRegion,
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runTime.constant(),
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runTime
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),
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xferMove(newPoints),
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cellShapes,
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boundary,
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patchNames,
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patchTypes,
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defaultFacesName,
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defaultFacesType,
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patchPhysicalTypes
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);
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// Set the precision of the points data to 10
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IOstream::defaultPrecision(10);
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Info<< "Writing polyMesh" << endl;
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pShapeMesh.write();
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Info<< "End\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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