void Foam::CV2D::writeTriangles(const fileName& fName, bool internalOnly) const
{
Info<< "Writing triangles to " << fName << nl << endl;
OFstream str(fName);
labelList vertexMap(number_of_vertices(), -2);
label verti = 0;
for
(
Triangulation::Finite_vertices_iterator vit = finite_vertices_begin();
vit != finite_vertices_end();
++vit
)
{
if (!internalOnly || !vit->farPoint())
{
vertexMap[vit->index()] = verti++;
meshTools::writeOBJ(str, toPoint3D(vit->point()));
}
}
for
(
Triangulation::Finite_faces_iterator fit = finite_faces_begin();
fit != finite_faces_end();
++fit
)
{
if
(
!internalOnly
|| (
fit->vertex(0)->internalOrBoundaryPoint()
|| fit->vertex(1)->internalOrBoundaryPoint()
|| fit->vertex(2)->internalOrBoundaryPoint()
)
)
{
str << "f";
for (label i = 0; i < 3; ++i)
{
str << " " << vertexMap[fit->vertex(i)->index()] + 1;
}
str << nl;
}
}
}
void Foam::CV2D::writePoints(const fileName& fName, bool internalOnly) const
{
Info<< "Writing points to " << fName << nl << endl;
OFstream str(fName);
for
(
Triangulation::Finite_vertices_iterator vit = finite_vertices_begin();
vit != finite_vertices_end();
++vit
)
{
if (!internalOnly || vit->internalOrBoundaryPoint())
{
meshTools::writeOBJ(str, toPoint3D(vit->point()));
}
}
}
void Foam::CV2D::insertPoints
(
const point2DField& points,
const scalar nearness
)
{
Info<< "insertInitialPoints(const point2DField& points): ";
startOfInternalPoints_ = number_of_vertices();
label nVert = startOfInternalPoints_;
// Add the points and index them
forAll(points, i)
{
const point2D& p = points[i];
if (qSurf_.wellInside(toPoint3D(p), nearness))
{
insert(toPoint(p))->index() = nVert++;
}
else
{
Warning
<< "Rejecting point " << p << " outside surface" << endl;
}
}
Info<< nVert << " vertices inserted" << endl;
if (meshControls().objOutput())
{
// Checking validity of triangulation
assert(is_valid());
writeTriangles("initial_triangles.obj", true);
writeFaces("initial_faces.obj", true);
}
}
void Foam::CV2D::writePatch(const fileName& fName) const
{
point2DField dual2DPoints;
faceList dualFaces;
wordList patchNames;
labelList patchSizes;
EdgeMap<label> mapEdgesRegion;
EdgeMap<label> indirectPatchEdge;
calcDual
(
dual2DPoints,
dualFaces,
patchNames,
patchSizes,
mapEdgesRegion,
indirectPatchEdge
);
pointField dualPoints(dual2DPoints.size());
forAll(dualPoints, ip)
{
dualPoints[ip] = toPoint3D(dual2DPoints[ip]);
}
void Foam::CV2D::extractPatches
(
wordList& patchNames,
labelList& patchSizes,
EdgeMap<label>& mapEdgesRegion,
EdgeMap<label>& indirectPatchEdge
) const
{
label nPatches = qSurf_.patchNames().size() + 1;
label defaultPatchIndex = qSurf_.patchNames().size();
patchNames.setSize(nPatches);
patchSizes.setSize(nPatches, 0);
mapEdgesRegion.clear();
const wordList& existingPatches = qSurf_.patchNames();
forAll(existingPatches, sP)
{
patchNames[sP] = existingPatches[sP];
}
patchNames[defaultPatchIndex] = "CV2D_default_patch";
for
(
Triangulation::Finite_edges_iterator eit = finite_edges_begin();
eit != finite_edges_end();
++eit
)
{
Face_handle fOwner = eit->first;
Face_handle fNeighbor = fOwner->neighbor(eit->second);
Vertex_handle vA = fOwner->vertex(cw(eit->second));
Vertex_handle vB = fOwner->vertex(ccw(eit->second));
if
(
(vA->internalOrBoundaryPoint() && !vB->internalOrBoundaryPoint())
|| (vB->internalOrBoundaryPoint() && !vA->internalOrBoundaryPoint())
)
{
point ptA = toPoint3D(vA->point());
point ptB = toPoint3D(vB->point());
label patchIndex = qSurf_.findPatch(ptA, ptB);
if (patchIndex == -1)
{
patchIndex = defaultPatchIndex;
WarningInFunction
<< "Dual face found that is not on a surface "
<< "patch. Adding to CV2D_default_patch."
<< endl;
}
edge e(fOwner->faceIndex(), fNeighbor->faceIndex());
patchSizes[patchIndex]++;
mapEdgesRegion.insert(e, patchIndex);
if (!pointPair(*vA, *vB))
{
indirectPatchEdge.insert(e, 1);
}
}
}
}
void Foam::CV2D::writeFaces(const fileName& fName, bool internalOnly) const
{
Info<< "Writing dual faces to " << fName << nl << endl;
OFstream str(fName);
label dualVerti = 0;
for
(
Triangulation::Finite_faces_iterator fit = finite_faces_begin();
fit != finite_faces_end();
++fit
)
{
if
(
!internalOnly
|| (
fit->vertex(0)->internalOrBoundaryPoint()
|| fit->vertex(1)->internalOrBoundaryPoint()
|| fit->vertex(2)->internalOrBoundaryPoint()
)
)
{
fit->faceIndex() = dualVerti++;
meshTools::writeOBJ(str, toPoint3D(circumcenter(fit)));
}
else
{
fit->faceIndex() = -1;
}
}
for
(
Triangulation::Finite_vertices_iterator vit = finite_vertices_begin();
vit != finite_vertices_end();
++vit
)
{
if (!internalOnly || vit->internalOrBoundaryPoint())
{
Face_circulator fcStart = incident_faces(vit);
Face_circulator fc = fcStart;
str<< 'f';
do
{
if (!is_infinite(fc))
{
if (fc->faceIndex() < 0)
{
FatalErrorInFunction
<< "Dual face uses vertex defined by a triangle"
" defined by an external point"
<< exit(FatalError);
}
str<< ' ' << fc->faceIndex() + 1;
}
} while (++fc != fcStart);
str<< nl;
}
}
}
void Foam::CV2D::newPoints()
{
const scalar relaxation = relaxationModel_->relaxation();
Info<< "Relaxation = " << relaxation << endl;
Field<point2D> dualVertices(number_of_faces());
label dualVerti = 0;
// Find the dual point of each tetrahedron and assign it an index.
for
(
Triangulation::Finite_faces_iterator fit = finite_faces_begin();
fit != finite_faces_end();
++fit
)
{
fit->faceIndex() = -1;
if
(
fit->vertex(0)->internalOrBoundaryPoint()
|| fit->vertex(1)->internalOrBoundaryPoint()
|| fit->vertex(2)->internalOrBoundaryPoint()
)
{
fit->faceIndex() = dualVerti;
dualVertices[dualVerti] = toPoint2D(circumcenter(fit));
dualVerti++;
}
}
dualVertices.setSize(dualVerti);
Field<vector2D> displacementAccumulator
(
startOfSurfacePointPairs_,
vector2D::zero
);
// Calculate target size and alignment for vertices
scalarField sizes
(
number_of_vertices(),
meshControls().minCellSize()
);
Field<vector2D> alignments
(
number_of_vertices(),
vector2D(1, 0)
);
for
(
Triangulation::Finite_vertices_iterator vit = finite_vertices_begin();
vit != finite_vertices_end();
++vit
)
{
if (vit->internalOrBoundaryPoint())
{
point2D vert = toPoint2D(vit->point());
// alignment and size determination
pointIndexHit pHit;
label hitSurface = -1;
qSurf_.findSurfaceNearest
(
toPoint3D(vert),
meshControls().span2(),
pHit,
hitSurface
);
if (pHit.hit())
{
vectorField norm(1);
allGeometry_[hitSurface].getNormal
(
List<pointIndexHit>(1, pHit),
norm
);
alignments[vit->index()] = toPoint2D(norm[0]);
sizes[vit->index()] =
cellSizeControl_.cellSize
(
toPoint3D(vit->point())
);
}
}
}
// Info<< "Calculated alignments" << endl;
scalar cosAlignmentAcceptanceAngle = 0.68;
// Upper and lower edge length ratios for weight
scalar u = 1.0;
scalar l = 0.7;
PackedBoolList pointToBeRetained(startOfSurfacePointPairs_, true);
std::list<Point> pointsToInsert;
for
(
Triangulation::Finite_edges_iterator eit = finite_edges_begin();
eit != finite_edges_end();
eit++
)
{
Vertex_handle vA = eit->first->vertex(cw(eit->second));
Vertex_handle vB = eit->first->vertex(ccw(eit->second));
if (!vA->internalOrBoundaryPoint() || !vB->internalOrBoundaryPoint())
{
continue;
}
const point2D& dualV1 = dualVertices[eit->first->faceIndex()];
const point2D& dualV2 =
dualVertices[eit->first->neighbor(eit->second)->faceIndex()];
scalar dualEdgeLength = mag(dualV1 - dualV2);
point2D dVA = toPoint2D(vA->point());
point2D dVB = toPoint2D(vB->point());
Field<vector2D> alignmentDirsA(2);
alignmentDirsA[0] = alignments[vA->index()];
alignmentDirsA[1] = vector2D
(
-alignmentDirsA[0].y(),
alignmentDirsA[0].x()
);
Field<vector2D> alignmentDirsB(2);
alignmentDirsB[0] = alignments[vB->index()];
alignmentDirsB[1] = vector2D
(
-alignmentDirsB[0].y(),
alignmentDirsB[0].x()
);
Field<vector2D> alignmentDirs(alignmentDirsA);
forAll(alignmentDirsA, aA)
{
const vector2D& a(alignmentDirsA[aA]);
scalar maxDotProduct = 0.0;
forAll(alignmentDirsB, aB)
{
const vector2D& b(alignmentDirsB[aB]);
scalar dotProduct = a & b;
if (mag(dotProduct) > maxDotProduct)
{
maxDotProduct = mag(dotProduct);
alignmentDirs[aA] = a + sign(dotProduct)*b;
alignmentDirs[aA] /= mag(alignmentDirs[aA]);
}
}
}
vector2D rAB = dVA - dVB;
scalar rABMag = mag(rAB);
forAll(alignmentDirs, aD)
{
vector2D& alignmentDir = alignmentDirs[aD];
if ((rAB & alignmentDir) < 0)
{
// swap the direction of the alignment so that has the
// same sense as rAB
alignmentDir *= -1;
}
scalar alignmentDotProd = ((rAB/rABMag) & alignmentDir);
if (alignmentDotProd > cosAlignmentAcceptanceAngle)
{
scalar targetFaceSize =
0.5*(sizes[vA->index()] + sizes[vB->index()]);
// Test for changing aspect ratio on second alignment (first
// alignment is neartest surface normal)
// if (aD == 1)
// {
// targetFaceSize *= 2.0;
// }
alignmentDir *= 0.5*targetFaceSize;
vector2D delta = alignmentDir - 0.5*rAB;
if (dualEdgeLength < 0.7*targetFaceSize)
{
delta *= 0;
}
else if (dualEdgeLength < targetFaceSize)
{
delta *=
(
dualEdgeLength
/(targetFaceSize*(u - l))
- 1/((u/l) - 1)
);
}
if
(
vA->internalPoint()
&& vB->internalPoint()
&& rABMag > 1.75*targetFaceSize
&& dualEdgeLength > 0.05*targetFaceSize
&& alignmentDotProd > 0.93
)
{
// Point insertion
pointsToInsert.push_back(toPoint(0.5*(dVA + dVB)));
}
else if
(
(vA->internalPoint() || vB->internalPoint())
&& rABMag < 0.65*targetFaceSize
)
{
// Point removal
// Only insert a point at the midpoint of the short edge
// if neither attached point has already been identified
// to be removed.
if
(
pointToBeRetained[vA->index()] == true
&& pointToBeRetained[vB->index()] == true
)
{
pointsToInsert.push_back(toPoint(0.5*(dVA + dVB)));
}
if (vA->internalPoint())
{
pointToBeRetained[vA->index()] = false;
}
if (vB->internalPoint())
{
pointToBeRetained[vB->index()] = false;
}
}
else
{
if (vA->internalPoint())
{
displacementAccumulator[vA->index()] += delta;
}
if (vB->internalPoint())
{
displacementAccumulator[vB->index()] += -delta;
}
}
}
}
}
