const vectorField& localVertices = tlocalVertices();
// Determine triangulation
List<vector2D> localVertices2D(localVertices.size());
forAll(localVertices, i)
{
localVertices2D[i][0] = localVertices[i][0];
localVertices2D[i][1] = localVertices[i][1];
}
triSurface s(triSurfaceTools::delaunay2D(localVertices2D));
tmp<pointField> localFaceCentres
(
referenceCS().localPosition
(
this->patch().patch().faceCentres()
)
);
if (debug)
{
Pout<< "readSamplePoints :"
<<" Dumping triangulated surface to triangulation.stl" << endl;
s.write(this->db().time().path()/"triangulation.stl");
OFstream str(this->db().time().path()/"localFaceCentres.obj");
Pout<< "readSamplePoints :"
<< " Dumping face centres to " << str.name() << endl;
forAll(localFaceCentres(), i)
{
void timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()
{
// Read the sample points
pointIOField samplePoints
(
IOobject
(
"points",
this->db().time().constant(),
"boundaryData"/this->patch().name(),
this->db(),
IOobject::MUST_READ,
IOobject::AUTO_WRITE,
false
)
);
const fileName samplePointsFile = samplePoints.filePath();
if (debug)
{
Info<< "timeVaryingMappedFixedValueFvPatchField :"
<< " Read " << samplePoints.size() << " sample points from "
<< samplePointsFile << endl;
}
// Determine coordinate system from samplePoints
if (samplePoints.size() < 3)
{
FatalErrorIn
(
"timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()"
) << "Only " << samplePoints.size() << " points read from file "
<< samplePoints.objectPath() << nl
<< "Need at least three non-colinear samplePoints"
<< " to be able to interpolate."
<< "\n on patch " << this->patch().name()
<< " of field " << this->dimensionedInternalField().name()
<< " in file " << this->dimensionedInternalField().objectPath()
<< exit(FatalError);
}
const point& p0 = samplePoints[0];
// Find point separate from p0
vector e1;
label index1 = -1;
for (label i = 1; i < samplePoints.size(); i++)
{
e1 = samplePoints[i] - p0;
scalar magE1 = mag(e1);
if (magE1 > SMALL)
{
e1 /= magE1;
index1 = i;
break;
}
}
// Find point that makes angle with n1
label index2 = -1;
vector e2;
vector n;
for (label i = index1+1; i < samplePoints.size(); i++)
{
e2 = samplePoints[i] - p0;
scalar magE2 = mag(e2);
if (magE2 > SMALL)
{
e2 /= magE2;
n = e1^e2;
scalar magN = mag(n);
if (magN > SMALL)
{
index2 = i;
n /= magN;
break;
}
}
}
if (index2 == -1)
{
FatalErrorIn
(
"timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()"
) << "Cannot find points that make valid normal." << nl
<< "Need at least three sample points which are not in a line."
<< "\n on patch " << this->patch().name()
<< " of field " << this->dimensionedInternalField().name()
<< " in file " << this->dimensionedInternalField().objectPath()
<< exit(FatalError);
}
if (debug)
{
Info<< "timeVaryingMappedFixedValueFvPatchField :"
<< " Used points " << p0 << ' ' << samplePoints[index1]
<< ' ' << samplePoints[index2]
<< " to define coordinate system with normal " << n << endl;
}
referenceCS_.reset
(
new cartesianCS
(
"reference",
p0, // origin
n, // normal
e1 // 0-axis
)
);
tmp<vectorField> tlocalVertices
(
referenceCS().localPosition(samplePoints)
);
const vectorField& localVertices = tlocalVertices();
// Determine triangulation
List<vector2D> localVertices2D(localVertices.size());
forAll(localVertices, i)
{
localVertices2D[i][0] = localVertices[i][0];
localVertices2D[i][1] = localVertices[i][1];
}
void timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()
{
// Read the sample points
pointIOField samplePoints
(
IOobject
(
"points",
this->db().time().constant(),
"boundaryData"/this->patch().name(),
this->db(),
IOobject::MUST_READ,
IOobject::AUTO_WRITE,
false
)
);
const fileName samplePointsFile = samplePoints.filePath();
if (debug)
{
Info<< "timeVaryingMappedFixedValueFvPatchField :"
<< " Read " << samplePoints.size() << " sample points from "
<< samplePointsFile << endl;
}
// Determine coordinate system from samplePoints
if (samplePoints.size() < 3)
{
FatalErrorIn
(
"timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()"
) << "Only " << samplePoints.size() << " points read from file "
<< samplePoints.objectPath() << nl
<< "Need at least three non-colinear samplePoints"
<< " to be able to interpolate."
<< "\n on patch " << this->patch().name()
<< " of points " << samplePoints.name()
<< " in file " << samplePoints.objectPath()
<< exit(FatalError);
}
const point& p0 = samplePoints[0];
// Find furthest away point
vector e1;
label index1 = -1;
scalar maxDist = -GREAT;
for (label i = 1; i < samplePoints.size(); i++)
{
const vector d = samplePoints[i] - p0;
scalar magD = mag(d);
if (magD > maxDist)
{
e1 = d/magD;
index1 = i;
maxDist = magD;
}
}
// Find point that is furthest away from line p0-p1
const point& p1 = samplePoints[index1];
label index2 = -1;
maxDist = -GREAT;
for (label i = 1; i < samplePoints.size(); i++)
{
if (i != index1)
{
const point& p2 = samplePoints[i];
vector e2(p2 - p0);
e2 -= (e2&e1)*e1;
scalar magE2 = mag(e2);
if (magE2 > maxDist)
{
index2 = i;
maxDist = magE2;
}
}
}
if (index2 == -1)
{
FatalErrorIn
(
"timeVaryingMappedFixedValueFvPatchField<Type>::readSamplePoints()"
) << "Cannot find points that make valid normal." << nl
<< "Have so far points " << p0 << " and " << p1
<< "Need at least three sample points which are not in a line."
<< "\n on patch " << this->patch().name()
<< " of points " << samplePoints.name()
<< " in file " << samplePoints.objectPath()
<< exit(FatalError);
}
vector n = e1^(samplePoints[index2]-p0);
n /= mag(n);
if (debug)
{
Info<< "timeVaryingMappedFixedValueFvPatchField :"
<< " Used points " << p0 << ' ' << samplePoints[index1]
<< ' ' << samplePoints[index2]
<< " to define coordinate system with normal " << n << endl;
}
referenceCS_.reset
(
new coordinateSystem
(
"reference",
p0, // origin
n, // normal
e1 // 0-axis
)
);
tmp<vectorField> tlocalVertices
(
referenceCS().localPosition(samplePoints)
);
vectorField& localVertices = tlocalVertices();
const boundBox bb(localVertices, true);
const point bbMid(bb.midpoint());
if (debug)
{
Info<< "timeVaryingMappedFixedValueFvPatchField :"
<< " Perturbing points with " << perturb_
<< " fraction of a random position inside " << bb
<< " to break any ties on regular meshes."
<< nl << endl;
}
Random rndGen(123456);
forAll(localVertices, i)
{
localVertices[i] +=
perturb_
*(rndGen.position(bb.min(), bb.max())-bbMid);
}
