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Fix edge case in BoundaryLayer 2d growth vector limitation

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This commit is contained in:
Matthias Hochsteger 2023-10-13 14:03:58 +02:00
parent 6f6b1fcb56
commit 73c2eded15
1 changed files with 11 additions and 6 deletions
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17
libsrc/meshing/boundarylayer2d.cpp
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@ -488,7 +488,7 @@ namespace netgen
for ( auto pi : {seg0[0], seg0[1]} )
{
if(growthvectors[pi] == 0.0)
if(growthvectors[pi].Length2() == 0.0)
continue;
PointIndex pi1 = seg0[0] + seg0[1] - pi;
@ -523,7 +523,7 @@ namespace netgen
{
double safety = 1.3;
double t = safety*total_thickness;
if(growthvectors[pi] == 0.0)
if(growthvectors[pi].Length2() == 0.0)
continue;
Point<3> points[] = { p10, p10+t*growthvectors[seg1[0]], p11, p11+t*growthvectors[seg1[1]] };
@ -534,16 +534,21 @@ namespace netgen
double alpha, beta;
if(X_INTERSECTION == intersect( P2(p0), P2(p1), P2(points[0]), P2(points[2]), alpha, beta ))
auto checkIntersection = [] (Point<2> p0, Point<2> p1, Point<2> q0, Point<2> q1, double & alpha, double & beta) {
auto intersection_type = intersect( p0, p1, q0, q1, alpha, beta );
return intersection_type == X_INTERSECTION || intersection_type == T_INTERSECTION_P || intersection_type == T_INTERSECTION_Q;
};
if(checkIntersection( P2(p0), P2(p1), P2(points[0]), P2(points[2]), alpha, beta ))
intersections.Append({alpha, 0.0});
if(X_INTERSECTION == intersect( P2(p0), P2(p1), P2(points[1]), P2(points[3]), alpha, beta ))
if(checkIntersection( P2(p0), P2(p1), P2(points[1]), P2(points[3]), alpha, beta ))
intersections.Append({alpha, 1.0});
if(X_INTERSECTION == intersect( P2(p0), P2(p1), P2(points[0]), P2(points[1]), alpha, beta ))
if(checkIntersection( P2(p0), P2(p1), P2(points[0]), P2(points[1]), alpha, beta ))
intersections.Append({alpha, beta});
if(X_INTERSECTION == intersect( P2(p0), P2(p1), P2(points[2]), P2(points[3]), alpha, beta ))
if(checkIntersection( P2(p0), P2(p1), P2(points[2]), P2(points[3]), alpha, beta ))
intersections.Append({alpha, beta});
QuickSort(intersections);