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(); } }