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ENH: foamyHexMesh: do not allow perturbation to cross surface

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This commit is contained in:
laurence
2013-08-30 12:19:48 +01:00
parent 6f4202c08c
commit 5e3a057965
2 changed files with 105 additions and 25 deletions
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120
applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/initialPointsMethod/rayShooting/rayShooting.C
View File

@ -37,6 +37,90 @@ namespace Foam
defineTypeNameAndDebug(rayShooting, 0);
addToRunTimeSelectionTable(initialPointsMethod, rayShooting, dictionary);
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
void rayShooting::splitLine
(
const line<point, point>& l,
const scalar& pert,
DynamicList<Vb::Point>& initialPoints
) const
{
Foam::point midPoint(l.centre());
const scalar localCellSize(cellShapeControls().cellSize(midPoint));
const scalar lineLength(l.mag());
const scalar minDistFromSurfaceSqr
(
minimumSurfaceDistanceCoeffSqr_
*sqr(localCellSize)
);
if
(
magSqr(midPoint - l.start()) > minDistFromSurfaceSqr
&& magSqr(midPoint - l.end()) > minDistFromSurfaceSqr
)
{
// Add extra points if line length is much bigger than local cell size
// if (lineLength > 4.0*localCellSize)
// {
// splitLine
// (
// line<point, point>(l.start(), midPoint),
// pert,
// initialPoints
// );
//
// splitLine
// (
// line<point, point>(midPoint, l.end()),
// pert,
// initialPoints
// );
// }
if (randomiseInitialGrid_)
{
Foam::point newPt
(
midPoint.x() + pert*(rndGen().scalar01() - 0.5),
midPoint.y() + pert*(rndGen().scalar01() - 0.5),
midPoint.z() + pert*(rndGen().scalar01() - 0.5)
);
if
(
!geometryToConformTo().findSurfaceAnyIntersection
(
midPoint,
newPt
)
)
{
midPoint = newPt;
}
else
{
WarningIn
(
"rayShooting::splitLine"
"("
" const line<point,point>&,"
" const scalar&,"
" DynamicList<Vb::Point>&"
")"
) << "Point perturbation crosses a surface. Not inserting."
<< endl;
}
}
initialPoints.append(toPoint(midPoint));
}
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
rayShooting::rayShooting
@ -75,7 +159,7 @@ List<Vb::Point> rayShooting::initialPoints() const
const searchableSurfaces& surfaces = geometryToConformTo().geometry();
const labelList& surfacesToConformTo = geometryToConformTo().surfaces();
const scalar maxRayLength = surfaces.bounds().mag();
const scalar maxRayLength(surfaces.bounds().mag());
// Initialise points list
label initialPointsSize = 0;
@ -94,8 +178,7 @@ List<Vb::Point> rayShooting::initialPoints() const
const pointField& faceCentres = faceCentresTmp();
Info<< " Shoot rays from " << s.name() << nl
<< " nRays = " << faceCentres.size() << endl;
<< " nRays = " << faceCentres.size() << endl;
forAll(faceCentres, fcI)
{
@ -110,9 +193,11 @@ List<Vb::Point> rayShooting::initialPoints() const
continue;
}
const scalar pert =
const scalar pert
(
randomPerturbationCoeff_
*cellShapeControls().cellSize(fC);
*cellShapeControls().cellSize(fC)
);
pointIndexHit surfHitStart;
label hitSurfaceStart;
@ -181,27 +266,12 @@ List<Vb::Point> rayShooting::initialPoints() const
}
}
Foam::point midPoint(l.centre());
const scalar minDistFromSurfaceSqr =
minimumSurfaceDistanceCoeffSqr_
*sqr(cellShapeControls().cellSize(midPoint));
if (randomiseInitialGrid_)
{
midPoint.x() += pert*(rndGen().scalar01() - 0.5);
midPoint.y() += pert*(rndGen().scalar01() - 0.5);
midPoint.z() += pert*(rndGen().scalar01() - 0.5);
}
if
splitLine
(
magSqr(midPoint - l.start()) > minDistFromSurfaceSqr
&& magSqr(midPoint - l.end()) > minDistFromSurfaceSqr
)
{
initialPoints.append(toPoint(midPoint));
}
l,
pert,
initialPoints
);
}
}
}

10
applications/utilities/mesh/generation/foamyHexMesh/conformalVoronoiMesh/initialPointsMethod/rayShooting/rayShooting.H
View File

@ -61,6 +61,16 @@ private:
scalar randomPerturbationCoeff_;
// Private Member Functions
void splitLine
(
const line<point, point>& l,
const scalar& pert,
DynamicList<Vb::Point>& initialPoints
) const;
public:
//- Runtime type information