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interpolate tangential part of growth vector along edge

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Christopher Lackner 2022-02-28 08:29:22 +01:00 committed by mhochsteger@cerbsim.com
parent dabb3b9dbf
commit 3a86103392
1 changed files with 71 additions and 1 deletions
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72
libsrc/meshing/boundarylayer.cpp
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@ -156,7 +156,7 @@ namespace netgen
} }
} }
seg.edgenr = topo.GetEdge(segi)+1; // seg.edgenr = topo.GetEdge(segi)+1;
segments.Append(seg); segments.Append(seg);
} }
} }
@ -291,6 +291,8 @@ namespace netgen
// moved segments // moved segments
Array<SegmentIndex> moved_segs; Array<SegmentIndex> moved_segs;
BitArray moved_edges(max_edge_nr+1);
moved_edges = false;
Array<Segment> new_segments; Array<Segment> new_segments;
// boundaries to project endings to // boundaries to project endings to
@ -307,6 +309,7 @@ namespace netgen
segs_done.SetBit(si); segs_done.SetBit(si);
segmap[si].Append(make_pair(si, 0)); segmap[si].Append(make_pair(si, 0));
moved_segs.Append(si); moved_segs.Append(si);
moved_edges.SetBit(segi.edgenr);
for(auto sj : Range(segments)) for(auto sj : Range(segments))
{ {
if(segs_done.Test(sj)) continue; if(segs_done.Test(sj)) continue;
@ -402,6 +405,73 @@ namespace netgen
Array<int, PointIndex> p2face(mesh.GetNP()); Array<int, PointIndex> p2face(mesh.GetNP());
p2face = 0; p2face = 0;
// interpolate tangential component of growth vector along edge
for(auto edgenr : Range(max_edge_nr))
{
if(!moved_edges[edgenr+1]) continue;
// can only interpolate on geometry edges
if(!mesh.GetGeometry())
break;
const auto& geo = *mesh.GetGeometry();
if(edgenr >= geo.GetNEdges())
continue;
// build sorted list of edge
Array<PointIndex> points;
// find first vertex on edge
for(const auto& seg : segments)
{
if(seg.edgenr-1 == edgenr && mesh[seg[0]].Type() == FIXEDPOINT)
{
points.Append(seg[0]);
break;
}
}
while(true)
{
for(auto si : meshtopo.GetVertexSegments(points.Last()))
{
const auto& seg = mesh[si];
if(seg.edgenr-1 != edgenr)
continue;
if(seg[0] == points.Last() &&
(points.Size() < 2 || points[points.Size()-2] !=seg[1]))
{
points.Append(seg[1]);
break;
}
}
if(mesh[points.Last()].Type() == FIXEDPOINT)
break;
}
// tangential part of growth vectors
EdgePointGeomInfo gi;
Point<3> p = mesh[points[0]];
const auto& edge = geo.GetEdge(edgenr);
edge.ProjectPoint(p, &gi);
auto tau1 = gi.dist;
auto t1 = edge.GetTangent(tau1);
t1 *= 1./t1.Length();
p = mesh[points.Last()];
edge.ProjectPoint(p, &gi);
auto tau2 = gi.dist;
auto t2 = edge.GetTangent(gi.dist);
t2 *= 1./t2.Length();
auto gt1 = (growthvectors[points[0]] * t1) * t1;
auto gt2 = (growthvectors[points.Last()] * t2) * t2;
for(size_t i = 1; i < points.Size()-1; i++)
{
auto pi = points[i];
p = mesh[pi];
edge.ProjectPoint(p, &gi);
auto tau = gi.dist;
auto interpol = (1-fabs(tau-tau1)) * gt1 + (1-fabs(tau-tau2))*gt2;
growthvectors[pi] += interpol;
}
}
// interpolate growth vectors at inner surface points from surrounding edge points // interpolate growth vectors at inner surface points from surrounding edge points
Array<SurfaceElementIndex> surface_els; Array<SurfaceElementIndex> surface_els;
Array<PointIndex> edge_points; Array<PointIndex> edge_points;