299 lines
8.6 KiB
C
299 lines
8.6 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright held by original author
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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 the
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Free Software Foundation; either version 2 of the License, or (at your
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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, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Description
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\*---------------------------------------------------------------------------*/
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#include "vtkFoam.H"
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#include "fvMesh.H"
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#include "cellModeller.H"
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#include "vtkUnstructuredGrid.h"
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#include "vtkCellArray.h"
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#include "vtkFoamInsertNextPoint.H"
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void Foam::vtkFoam::addInternalMesh
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(
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const fvMesh& mesh,
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vtkUnstructuredGrid* vtkMesh
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)
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{
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SetName(vtkMesh, "Internal Mesh");
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// Number of additional points needed by the decomposition of polyhedra
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label nAddPoints = 0;
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// Number of additional cells generated by the decomposition of polyhedra
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label nAddCells = 0;
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const cellModel& tet = *(cellModeller::lookup("tet"));
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const cellModel& pyr = *(cellModeller::lookup("pyr"));
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const cellModel& prism = *(cellModeller::lookup("prism"));
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const cellModel& wedge = *(cellModeller::lookup("wedge"));
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const cellModel& tetWedge = *(cellModeller::lookup("tetWedge"));
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const cellModel& hex = *(cellModeller::lookup("hex"));
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// Scan for cells which need to be decomposed and count additional points
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// and cells
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if (debug)
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{
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Info<< "building cell-shapes" << endl;
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}
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const cellShapeList& cellShapes = mesh.cellShapes();
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if (debug)
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{
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Info<< "scanning" << endl;
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}
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forAll(cellShapes, cellI)
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{
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const cellModel& model = cellShapes[cellI].model();
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if
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(
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model != hex
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&& model != wedge
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&& model != prism
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&& model != pyr
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&& model != tet
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&& model != tetWedge
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)
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{
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const cell& cFaces = mesh.cells()[cellI];
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forAll(cFaces, cFaceI)
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{
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const face& f = mesh.faces()[cFaces[cFaceI]];
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label nFacePoints = f.size();
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label nQuads = (nFacePoints - 2)/2;
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label nTris = (nFacePoints - 2)%2;
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nAddCells += nQuads + nTris;
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}
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nAddCells--;
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nAddPoints++;
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}
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}
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// Set size of additional point addressing array
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// (from added point to original cell)
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addPointCellLabels_.setSize(nAddPoints);
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// Set size of additional cells mapping array
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// (from added cell to original cell)
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superCells_.setSize(mesh.nCells() + nAddCells);
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if (debug)
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{
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Info<< "converting points" << endl;
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}
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// Convert Foam mesh vertices to VTK
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vtkPoints *vtkpoints = vtkPoints::New();
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vtkpoints->Allocate(mesh.nPoints() + nAddPoints);
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const Foam::pointField& points = mesh.points();
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forAll(points, i)
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{
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vtkFoamInsertNextPoint(vtkpoints, points[i]);
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}
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if (debug)
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{
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Info<< "converting cells" << endl;
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}
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vtkMesh->Allocate(mesh.nCells() + nAddCells);
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// Set counters for additional points and additional cells
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label api = 0, aci = 0;
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forAll(cellShapes, celli)
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{
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const cellShape& cellShape = cellShapes[celli];
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const cellModel& cellModel = cellShape.model();
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superCells_[aci++] = celli;
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if (cellModel == tet)
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{
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vtkMesh->InsertNextCell
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(
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VTK_TETRA,
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4,
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const_cast<int*>(cellShape.begin())
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);
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}
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else if (cellModel == pyr)
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{
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vtkMesh->InsertNextCell
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(
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VTK_PYRAMID,
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5,
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const_cast<int*>(cellShape.begin())
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);
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}
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else if (cellModel == prism)
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{
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vtkMesh->InsertNextCell
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(
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VTK_WEDGE,
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6,
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const_cast<int*>(cellShape.begin())
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);
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}
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else if (cellModel == tetWedge)
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{
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// Treat as squeezed prism
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int vtkVerts[6];
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vtkVerts[0] = cellShape[0];
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vtkVerts[1] = cellShape[2];
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vtkVerts[2] = cellShape[1];
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vtkVerts[3] = cellShape[3];
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vtkVerts[4] = cellShape[4];
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vtkVerts[5] = cellShape[4];
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vtkMesh->InsertNextCell(VTK_WEDGE, 6, vtkVerts);
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}
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else if (cellModel == wedge)
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{
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// Treat as squeezed hex
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int vtkVerts[8];
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vtkVerts[0] = cellShape[0];
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vtkVerts[1] = cellShape[1];
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vtkVerts[2] = cellShape[2];
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vtkVerts[3] = cellShape[2];
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vtkVerts[4] = cellShape[3];
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vtkVerts[5] = cellShape[4];
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vtkVerts[6] = cellShape[5];
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vtkVerts[7] = cellShape[6];
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vtkMesh->InsertNextCell(VTK_HEXAHEDRON, 8, vtkVerts);
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}
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else if (cellModel == hex)
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{
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vtkMesh->InsertNextCell
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(
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VTK_HEXAHEDRON,
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8,
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const_cast<int*>(cellShape.begin())
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);
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}
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else
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{
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// Polyhedral cell. Decompose into tets + prisms.
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// Mapping from additional point to cell
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addPointCellLabels_[api] = celli;
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// Insert the new vertex from the cell-centre
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label newVertexLabel = mesh.nPoints() + api;
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vtkFoamInsertNextPoint(vtkpoints, mesh.C()[celli]);
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// Whether to insert cell in place of original or not.
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bool substituteCell = true;
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const labelList& cFaces = mesh.cells()[celli];
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forAll(cFaces, cFaceI)
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{
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const face& f = mesh.faces()[cFaces[cFaceI]];
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label nFacePoints = f.size();
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label nQuads = (nFacePoints - 2)/2;
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label nTris = (nFacePoints - 2)%2;
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label qpi = 0;
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for (label quadi=0; quadi<nQuads; quadi++)
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{
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label thisCellI = -1;
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if (substituteCell)
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{
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thisCellI = celli;
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substituteCell = false;
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}
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else
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{
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thisCellI = mesh.nCells() + aci;
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superCells_[aci++] = celli;
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}
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int addVtkVerts[5];
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addVtkVerts[0] = f[0];
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addVtkVerts[1] = f[qpi + 1];
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addVtkVerts[2] = f[qpi + 2];
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addVtkVerts[3] = f[qpi + 3];
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addVtkVerts[4] = newVertexLabel;
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vtkMesh->InsertNextCell(VTK_PYRAMID, 5, addVtkVerts);
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qpi += 2;
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}
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if (nTris)
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{
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label thisCellI = -1;
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if (substituteCell)
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{
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thisCellI = celli;
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substituteCell = false;
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}
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else
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{
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thisCellI = mesh.nCells() + aci;
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superCells_[aci++] = celli;
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}
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int addVtkVerts[4];
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addVtkVerts[0] = f[0];
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addVtkVerts[1] = f[qpi + 1];
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addVtkVerts[2] = f[qpi + 2];
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addVtkVerts[3] = newVertexLabel;
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vtkMesh->InsertNextCell(VTK_TETRA, 4, addVtkVerts);
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}
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}
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api++;
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}
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}
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vtkMesh->SetPoints(vtkpoints);
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vtkpoints->Delete();
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}
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// ************************************************************************* //
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