400 lines
11 KiB
C++
400 lines
11 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2011-2024 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM 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
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Application
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blockMesh
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Description
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A multi-block mesh generator.
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Uses the block mesh description found in
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- \c system/blockMeshDict
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- \c system/\<region\>/blockMeshDict
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- \c constant/polyMesh/blockMeshDict
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- \c constant/\<region\>/polyMesh/blockMeshDict
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Usage
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\b blockMesh [OPTION]
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Options:
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- \par -blockTopology
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Write the topology as a set of edges in OBJ format.
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- \par -region \<name\>
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Specify an alternative mesh region.
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- \par -dict \<filename\>
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Specify alternative dictionary for the block mesh description.
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "Time.H"
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#include "systemDict.H"
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#include "blockMesh.H"
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#include "mergePatchPairs.H"
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#include "polyTopoChange.H"
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#include "emptyPolyPatch.H"
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#include "cyclicPolyPatch.H"
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#include "OFstream.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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argList::noParallel();
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Foam::argList::removeOption("noFunctionObjects");
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#include "addDictOption.H"
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argList::addBoolOption
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(
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"blockTopology",
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"write block edges and centres as .obj files"
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);
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argList::addBoolOption
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(
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"noClean",
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"keep the existing files in the polyMesh"
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);
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argList::addNote
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(
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"Block description\n"
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"\n"
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" For a given block, the correspondence between the ordering of\n"
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" vertex labels and face labels is shown below.\n"
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" For vertex numbering in the sequence 0 to 7 (block, centre):\n"
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" faces 0 (f0) and 1 are left and right, respectively;\n"
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" faces 2 and 3 are front and back; \n"
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" and faces 4 and 5 are bottom and top::\n"
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"\n"
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" 7 ---- 6\n"
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" f5 |\\ |\\ f3\n"
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" | | 4 ---- 5 \\\n"
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" | 3 |--- 2 | \\\n"
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" | \\| \\| f2\n"
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" f4 0 ---- 1\n"
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"\n"
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" Z f0 ----- f1\n"
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" | Y\n"
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" | /\n"
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" O --- X\n"
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);
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#include "addRegionOption.H"
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#include "setRootCase.H"
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#include "createTime.H"
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const word dictName("blockMeshDict");
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word regionName;
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word regionPath;
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// Check if the region is specified otherwise mesh the default region
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if (args.optionReadIfPresent("region", regionName, polyMesh::defaultRegion))
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{
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Info<< nl << "Generating mesh for region " << regionName << endl;
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regionPath = regionName;
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}
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if (!args.optionFound("noClean"))
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{
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fileName polyMeshPath
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(
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runTime.path()/runTime.constant()/regionPath/polyMesh::meshSubDir
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);
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if (exists(polyMeshPath))
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{
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if (exists(polyMeshPath/dictName))
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{
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Info<< "Not deleting polyMesh directory " << nl
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<< " " << polyMeshPath << nl
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<< " because it contains " << dictName << endl;
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}
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else
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{
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Info<< "Deleting polyMesh directory" << nl
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<< " " << polyMeshPath << endl;
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rmDir(polyMeshPath);
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}
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}
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}
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typeIOobject<IOdictionary> meshDictIO
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(
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systemDictIO(dictName, args, runTime, regionName)
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);
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if (!meshDictIO.headerOk())
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{
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FatalErrorInFunction
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<< "Cannot find file " << meshDictIO.relativeObjectPath()
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<< nl
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<< exit(FatalError);
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}
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Info<< "Creating block mesh from\n "
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<< meshDictIO.relativeObjectPath() << endl;
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IOdictionary meshDict(meshDictIO);
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blockMesh blocks(meshDict, regionName);
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if (args.optionFound("blockTopology"))
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{
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// Write mesh as edges.
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{
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fileName objMeshFile("blockTopology.obj");
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OFstream str(runTime.path()/objMeshFile);
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Info<< nl << "Dumping block structure as Lightwave obj format"
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<< " to " << objMeshFile << endl;
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blocks.writeTopology(str);
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}
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// Write centres of blocks
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{
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fileName objCcFile("blockCentres.obj");
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OFstream str(runTime.path()/objCcFile);
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Info<< nl << "Dumping block centres as Lightwave obj format"
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<< " to " << objCcFile << endl;
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const polyMesh& topo = blocks.topology();
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const pointField& cellCentres = topo.cellCentres();
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forAll(cellCentres, celli)
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{
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// point cc = b.blockShape().centre(b.points());
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const point& cc = cellCentres[celli];
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str << "v " << cc.x() << ' ' << cc.y() << ' ' << cc.z() << nl;
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}
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}
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Info<< nl << "end" << endl;
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return 0;
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}
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Info<< nl << "Creating polyMesh from blockMesh" << endl;
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word defaultFacesName = "defaultFaces";
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word defaultFacesType = emptyPolyPatch::typeName;
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polyMesh mesh
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(
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IOobject
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(
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regionName,
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runTime.constant(),
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runTime
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),
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clone(blocks.points()), // could we re-use space?
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blocks.cells(),
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blocks.patches(),
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blocks.patchNames(),
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blocks.patchDicts(),
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defaultFacesName,
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defaultFacesType
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);
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// Read in a list of dictionaries for the merge patch pairs
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if (meshDict.found("mergePatchPairs"))
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{
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List<Pair<word>> patchPairNames
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(
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meshDict.lookup("mergePatchPairs")
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);
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if (patchPairNames.size())
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{
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const word oldInstance = mesh.pointsInstance();
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mergePatchPairs(mesh, patchPairNames, 1e-4);
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mesh.setInstance(oldInstance);
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}
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}
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else
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{
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Info<< nl << "No patch pairs to merge" << endl;
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}
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label nZones = blocks.numZonedBlocks();
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if (nZones > 0)
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{
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Info<< nl << "Adding cell zones" << endl;
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// Map from zoneName to cellZone index
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HashTable<label> zoneMap(nZones);
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// Cells per zone.
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List<DynamicList<label>> zoneCells(nZones);
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// Running cell counter
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label celli = 0;
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// Largest zone so far
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label freeZoneI = 0;
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forAll(blocks, blockI)
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{
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const block& b = blocks[blockI];
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const List<FixedList<label, 8>> blockCells = b.cells();
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const word& zoneName = b.zoneName();
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if (zoneName.size())
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{
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HashTable<label>::const_iterator iter = zoneMap.find(zoneName);
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label zoneI;
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if (iter == zoneMap.end())
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{
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zoneI = freeZoneI++;
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Info<< " " << zoneI << '\t' << zoneName << endl;
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zoneMap.insert(zoneName, zoneI);
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}
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else
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{
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zoneI = iter();
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}
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forAll(blockCells, i)
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{
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zoneCells[zoneI].append(celli++);
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}
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}
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else
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{
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celli += blockCells.size();
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}
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}
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List<cellZone*> cz(zoneMap.size());
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forAllConstIter(HashTable<label>, zoneMap, iter)
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{
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label zoneI = iter();
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cz[zoneI] = new cellZone
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(
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iter.key(),
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zoneCells[zoneI].shrink(),
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zoneI,
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mesh.cellZones()
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);
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}
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mesh.pointZones().setSize(0);
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mesh.faceZones().setSize(0);
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mesh.cellZones().setSize(0);
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mesh.addZones(List<pointZone*>(0), List<faceZone*>(0), cz);
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}
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// Detect any cyclic patches and force re-ordering of the faces
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{
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const polyPatchList& patches = mesh.boundaryMesh();
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bool hasCyclic = false;
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forAll(patches, patchi)
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{
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if (isA<cyclicPolyPatch>(patches[patchi]))
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{
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hasCyclic = true;
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break;
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}
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}
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if (hasCyclic)
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{
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Info<< nl << "Detected cyclic patches; ordering boundary faces"
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<< endl;
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const word oldInstance = mesh.instance();
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polyTopoChange meshMod(mesh);
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meshMod.changeMesh(mesh, false);
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mesh.setInstance(oldInstance);
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}
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}
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// Set the precision of the points data to 10
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IOstream::defaultPrecision(max(10u, IOstream::defaultPrecision()));
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Info<< nl << "Writing polyMesh" << endl;
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mesh.removeFiles();
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if (!mesh.write())
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{
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FatalErrorInFunction
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<< "Failed writing polyMesh."
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<< exit(FatalError);
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}
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// Write summary
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{
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const polyPatchList& patches = mesh.boundaryMesh();
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Info<< "----------------" << nl
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<< "Mesh Information" << nl
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<< "----------------" << nl
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<< " " << "boundingBox: " << boundBox(mesh.points()) << nl
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<< " " << "nPoints: " << mesh.nPoints() << nl
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<< " " << "nCells: " << mesh.nCells() << nl
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<< " " << "nFaces: " << mesh.nFaces() << nl
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<< " " << "nInternalFaces: " << mesh.nInternalFaces() << nl;
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Info<< "----------------" << nl
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<< "Patches" << nl
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<< "----------------" << nl;
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forAll(patches, patchi)
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{
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const polyPatch& p = patches[patchi];
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Info<< " " << "patch " << patchi
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<< " (start: " << p.start()
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<< " size: " << p.size()
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<< ") name: " << p.name()
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<< nl;
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}
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}
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Info<< "\nEnd\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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