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fix 1d FindPointInElement

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This commit is contained in:
Christopher Lackner 2025-03-07 18:01:00 +01:00
parent 0c789fb04f
commit d240203932
2 changed files with 17 additions and 4 deletions
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15
libsrc/interface/nginterface_v2.cpp
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@ -1011,14 +1011,23 @@ namespace netgen
int * const indices, int numind) const int * const indices, int numind) const
{ {
Point<3> p(hp[0], 0,0); Point<3> p(hp[0], 0., 0.);
if(mesh->GetDimension() > 1)
p[1] = hp[1];
if(mesh->GetDimension() == 3)
p[2] = hp[2];
for (SegmentIndex si = 0; si < mesh->GetNSeg(); si++) for (SegmentIndex si = 0; si < mesh->GetNSeg(); si++)
{ {
auto & seg = (*mesh)[si]; auto & seg = (*mesh)[si];
Point<3> p1 = (*mesh)[seg[0]]; Point<3> p1 = (*mesh)[seg[0]];
Point<3> p2 = (*mesh)[seg[1]]; Point<3> p2 = (*mesh)[seg[1]];
double lam = (p(0)-p1(0)) / (p2(0)-p1(0)); Vec<3> v1 = p2-p1;
if (lam >= -1e-10 && lam <= 1+1e-10) Vec<3> v2 = p-p1;
double lam = v1*v2 / v1.Length2();
double lam2 = (v2 - lam * v1).Length() / v1.Length();
if (lam >= -1e-10 && lam <= 1+1e-10 && lam2 < 1e-10)
{ {
lami[0] = 1-lam; lami[0] = 1-lam;
return si; return si;

6
libsrc/meshing/meshclass.cpp
View File

@ -85,7 +85,11 @@ namespace netgen
int velement = 0; int velement = 0;
if(mesh.GetNE()) if(mesh.GetNE())
velement = Find3dElement(mesh, p,vlam,NULL,searchtree ? mesh.GetElementSearchTree(3) : nullptr,allowindex); {
if(searchtree)
const_cast<Mesh&>(mesh).BuildElementSearchTree(3);
velement = Find3dElement(mesh, p,vlam,NULL,searchtree ? mesh.GetElementSearchTree(3) : nullptr,allowindex);
}
//(*testout) << "p " << p << endl; //(*testout) << "p " << p << endl;
//(*testout) << "velement " << velement << endl; //(*testout) << "velement " << velement << endl;