void Foam::polyLineSet::calcSamples
(
DynamicList<point>& samplingPts,
DynamicList<label>& samplingCells,
DynamicList<label>& samplingFaces,
DynamicList<label>& samplingSegments,
DynamicList<scalar>& samplingCurveDist
) const
{
// Check sampling points
if (sampleCoords_.size() < 2)
{
FatalErrorInFunction
<< "Incorrect sample specification. Too few points:"
<< sampleCoords_ << exit(FatalError);
}
point oldPoint = sampleCoords_[0];
for (label sampleI = 1; sampleI < sampleCoords_.size(); sampleI++)
{
if (mag(sampleCoords_[sampleI] - oldPoint) < SMALL)
{
FatalErrorInFunction
<< "Incorrect sample specification."
<< " Point " << sampleCoords_[sampleI-1]
<< " at position " << sampleI-1
<< " and point " << sampleCoords_[sampleI]
<< " at position " << sampleI
<< " are too close" << exit(FatalError);
}
oldPoint = sampleCoords_[sampleI];
}
// Force calculation of cloud addressing on all processors
const bool oldMoving = const_cast<polyMesh&>(mesh()).moving(false);
passiveParticleCloud particleCloud(mesh());
// current segment number
label segmentI = 0;
// starting index of current segment in samplePts
label startSegmentI = 0;
label sampleI = 0;
point lastSample(GREAT, GREAT, GREAT);
while (true)
{
// Get boundary intersection
point trackPt;
label trackCelli = -1;
label trackFacei = -1;
do
{
const vector offset =
sampleCoords_[sampleI+1] - sampleCoords_[sampleI];
const scalar smallDist = mag(tol*offset);
// Get all boundary intersections
List<pointIndexHit> bHits = searchEngine().intersections
(
sampleCoords_[sampleI],
sampleCoords_[sampleI+1]
);
point bPoint(GREAT, GREAT, GREAT);
label bFacei = -1;
if (bHits.size())
{
bPoint = bHits[0].hitPoint();
bFacei = bHits[0].index();
}
// Get tracking point
bool isSample =
getTrackingPoint
(
sampleCoords_[sampleI],
bPoint,
bFacei,
smallDist,
trackPt,
trackCelli,
trackFacei
);
if (isSample && (mag(lastSample - trackPt) > smallDist))
{
//Info<< "calcSamples : getTrackingPoint returned valid sample "
// << " trackPt:" << trackPt
// << " trackFacei:" << trackFacei
// << " trackCelli:" << trackCelli
// << " sampleI:" << sampleI
// << " dist:" << dist
// << endl;
samplingPts.append(trackPt);
samplingCells.append(trackCelli);
samplingFaces.append(trackFacei);
// Convert sampling position to unique curve parameter. Get
// fraction of distance between sampleI and sampleI+1.
scalar dist =
mag(trackPt - sampleCoords_[sampleI])
/ mag(sampleCoords_[sampleI+1] - sampleCoords_[sampleI]);
samplingCurveDist.append(sampleI + dist);
lastSample = trackPt;
}
if (trackCelli == -1)
{
// No intersection found. Go to next point
sampleI++;
}
} while ((trackCelli == -1) && (sampleI < sampleCoords_.size() - 1));
if (sampleI == sampleCoords_.size() - 1)
{
//Info<< "calcSamples : Reached end of samples: "
// << " sampleI now:" << sampleI
// << endl;
break;
}
//
// Segment sampleI .. sampleI+1 intersected by domain
//
// Initialize tracking starting from sampleI
passiveParticle singleParticle
(
mesh(),
trackPt,
trackCelli
);
bool bReached = trackToBoundary
(
particleCloud,
singleParticle,
sampleI,
samplingPts,
samplingCells,
samplingFaces,
samplingCurveDist
);
// fill sampleSegments
for (label i = samplingPts.size() - 1; i >= startSegmentI; --i)
{
samplingSegments.append(segmentI);
}
if (!bReached)
{
//Info<< "calcSamples : Reached end of samples: "
// << " sampleI now:" << sampleI
// << endl;
break;
}
lastSample = singleParticle.position();
// Find next boundary.
sampleI++;
if (sampleI == sampleCoords_.size() - 1)
{
//Info<< "calcSamples : Reached end of samples: "
// << " sampleI now:" << sampleI
// << endl;
break;
}
segmentI++;
startSegmentI = samplingPts.size();
}
const_cast<polyMesh&>(mesh()).moving(oldMoving);
}
void Foam::faceOnlySet::calcSamples
(
DynamicList<point>& samplingPts,
DynamicList<label>& samplingCells,
DynamicList<label>& samplingFaces,
DynamicList<label>& samplingSegments,
DynamicList<scalar>& samplingCurveDist
) const
{
// distance vector between sampling points
if (mag(end_ - start_) < SMALL)
{
FatalErrorIn("faceOnlySet::calcSamples()")
<< "Incorrect sample specification :"
<< " start equals end point." << endl
<< " start:" << start_
<< " end:" << end_
<< exit(FatalError);
}
const vector offset = (end_ - start_);
const vector normOffset = offset/mag(offset);
const vector smallVec = tol*offset;
const scalar smallDist = mag(smallVec);
// Force calculation of minimum-tet decomposition.
(void) mesh().tetBasePtIs();
// Get all boundary intersections
List<pointIndexHit> bHits = searchEngine().intersections
(
start_ - smallVec,
end_ + smallVec
);
point bPoint(GREAT, GREAT, GREAT);
label bFaceI = -1;
if (bHits.size())
{
bPoint = bHits[0].hitPoint();
bFaceI = bHits[0].index();
}
// Get first tracking point. Use bPoint, bFaceI if provided.
point trackPt;
label trackCellI = -1;
label trackFaceI = -1;
//Info<< "before getTrackingPoint : bPoint:" << bPoint
// << " bFaceI:" << bFaceI << endl;
getTrackingPoint
(
offset,
start_,
bPoint,
bFaceI,
trackPt,
trackCellI,
trackFaceI
);
//Info<< "after getTrackingPoint : "
// << " trackPt:" << trackPt
// << " trackCellI:" << trackCellI
// << " trackFaceI:" << trackFaceI
// << endl;
if (trackCellI == -1)
{
// Line start_ - end_ does not intersect domain at all.
// (or is along edge)
// Set points and cell/face labels to empty lists
//Info<< "calcSamples : Both start_ and end_ outside domain"
// << endl;
return;
}
if (trackFaceI == -1)
{
// No boundary face. Check for nearish internal face
trackFaceI = findNearFace(trackCellI, trackPt, smallDist);
}
//Info<< "calcSamples : got first point to track from :"
// << " trackPt:" << trackPt
// << " trackCell:" << trackCellI
// << " trackFace:" << trackFaceI
// << endl;
//
// Track until hit end of all boundary intersections
//
// current segment number
label segmentI = 0;
// starting index of current segment in samplePts
label startSegmentI = 0;
// index in bHits; current boundary intersection
label bHitI = 1;
while(true)
{
if (trackFaceI != -1)
{
//Info<< "trackPt:" << trackPt << " on face so use." << endl;
samplingPts.append(trackPt);
samplingCells.append(trackCellI);
samplingFaces.append(trackFaceI);
samplingCurveDist.append(mag(trackPt - start_));
}
// Initialize tracking starting from trackPt
passiveParticle singleParticle
(
mesh(),
trackPt,
trackCellI
);
bool reachedBoundary = trackToBoundary
(
singleParticle,
samplingPts,
samplingCells,
samplingFaces,
samplingCurveDist
);
// fill sampleSegments
for (label i = samplingPts.size() - 1; i >= startSegmentI; --i)
{
samplingSegments.append(segmentI);
}
if (!reachedBoundary)
{
//Info<< "calcSamples : Reached end of samples: "
// << " samplePt now:" << singleParticle.position()
// << endl;
break;
}
// Go past boundary intersection where tracking stopped
// Use coordinate comparison instead of face comparison for
// accuracy reasons
bool foundValidB = false;
while (bHitI < bHits.size())
{
scalar dist =
(bHits[bHitI].hitPoint() - singleParticle.position())
& normOffset;
//Info<< "Finding next boundary : "
// << "bPoint:" << bHits[bHitI].hitPoint()
// << " tracking:" << singleParticle.position()
// << " dist:" << dist
// << endl;
if (dist > smallDist)
{
// hitpoint is past tracking position
foundValidB = true;
break;
}
else
{
bHitI++;
}
}
if (!foundValidB)
{
// No valid boundary intersection found beyond tracking position
break;
}
// Update starting point for tracking
trackFaceI = bHits[bHitI].index();
trackPt = pushIn(bHits[bHitI].hitPoint(), trackFaceI);
trackCellI = getBoundaryCell(trackFaceI);
segmentI++;
startSegmentI = samplingPts.size();
}
}
void Foam::uniformSet::calcSamples
(
DynamicList<point>& samplingPts,
dynamicLabelList& samplingCells,
dynamicLabelList& samplingFaces,
dynamicLabelList& samplingSegments,
DynamicList<scalar>& samplingCurveDist
) const
{
// distance vector between sampling points
if ((nPoints_ < 2) || (mag(end_ - start_) < SMALL))
{
FatalErrorIn("uniformSet::calcSamples()")
<< "Incorrect sample specification. Either too few points or"
<< " start equals end point." << endl
<< "nPoints:" << nPoints_
<< " start:" << start_
<< " end:" << end_
<< exit(FatalError);
}
const vector offset = (end_ - start_)/(nPoints_ - 1);
const vector normOffset = offset/mag(offset);
const vector smallVec = tol*offset;
const scalar smallDist = mag(smallVec);
// Get all boundary intersections
List<pointIndexHit> bHits = searchEngine().intersections
(
start_ - smallVec,
end_ + smallVec
);
point bPoint(GREAT, GREAT, GREAT);
label bFaceI = -1;
if (bHits.size())
{
bPoint = bHits[0].hitPoint();
bFaceI = bHits[0].index();
}
// Get first tracking point. Use bPoint, bFaceI if provided.
point trackPt;
label trackCellI = -1;
label trackFaceI = -1;
bool isSample =
getTrackingPoint
(
offset,
start_,
bPoint,
bFaceI,
trackPt,
trackCellI,
trackFaceI
);
if (trackCellI == -1)
{
// Line start_ - end_ does not intersect domain at all.
// (or is along edge)
// Set points and cell/face labels to empty lists
return;
}
if (isSample)
{
samplingPts.append(start_);
samplingCells.append(trackCellI);
samplingFaces.append(trackFaceI);
samplingCurveDist.append(0.0);
}
//
// Track until hit end of all boundary intersections
//
// current segment number
label segmentI = 0;
// starting index of current segment in samplePts
label startSegmentI = 0;
label sampleI = 0;
point samplePt = start_;
// index in bHits; current boundary intersection
label bHitI = 1;
while(true)
{
// Initialize tracking starting from trackPt
Cloud<passiveParticle> particles(mesh(), IDLList<passiveParticle>());
passiveParticle singleParticle
(
particles,
trackPt,
trackCellI
);
bool reachedBoundary = trackToBoundary
(
singleParticle,
samplePt,
sampleI,
samplingPts,
samplingCells,
samplingFaces,
samplingCurveDist
);
// fill sampleSegments
for(label i = samplingPts.size() - 1; i >= startSegmentI; --i)
{
samplingSegments.append(segmentI);
}
if (!reachedBoundary)
{
if (debug)
{
Info<< "calcSamples : Reached end of samples: "
<< " samplePt now:" << samplePt
<< " sampleI now:" << sampleI
<< endl;
}
break;
}
bool foundValidB = false;
while (bHitI < bHits.size())
{
scalar dist =
(bHits[bHitI].hitPoint() - singleParticle.position())
& normOffset;
if (debug)
{
Info<< "Finding next boundary : "
<< "bPoint:" << bHits[bHitI].hitPoint()
<< " tracking:" << singleParticle.position()
<< " dist:" << dist
<< endl;
}
if (dist > smallDist)
{
// hitpoint is past tracking position
foundValidB = true;
break;
}
else
{
bHitI++;
}
}
if (!foundValidB)
{
// No valid boundary intersection found beyond tracking position
break;
}
// Update starting point for tracking
trackFaceI = bFaceI;
trackPt = pushIn(bPoint, trackFaceI);
trackCellI = getBoundaryCell(trackFaceI);
segmentI++;
startSegmentI = samplingPts.size();
}
}
