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Don't divide/merge mesh when having only one domain

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Matthias Hochsteger 2021-06-22 11:25:50 +02:00
parent 2b8a2356a0
commit c7e9a822cc
1 changed files with 25 additions and 25 deletions
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50
libsrc/meshing/meshfunc.cpp
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@ -18,10 +18,9 @@ namespace netgen
// mesh for one domain (contains all adjacent surface elments)
unique_ptr<Mesh> mesh;
// maps from lokal (domain) mesh to global mesh
// maps from local (domain) mesh to global mesh
Array<PointIndex, PointIndex> pmap;
// todo: store (mapped) identifications
Array<INDEX_2> connected_pairs;
MeshingParameters mp;
@ -30,13 +29,25 @@ namespace netgen
};
// extract surface meshes belonging to individual domains
Array<MeshingData> DivideMesh(const Mesh & mesh, const MeshingParameters & mp)
Array<MeshingData> DivideMesh(Mesh & mesh, const MeshingParameters & mp)
{
static Timer timer("DivideMesh"); RegionTimer rt(timer);
Array<MeshingData> ret;
auto num_domains = mesh.GetNDomains();
ret.SetSize(num_domains);
if(num_domains==1 || mp.only3D_domain_nr)
{
// no need to divide mesh, just fill in meshing data
ret[0].domain = 1;
if(mp.only3D_domain_nr)
ret[0].domain = mp.only3D_domain_nr;
ret[0].mesh.reset(&mesh); // careful, this unique_ptr must not delete &mesh! (it will be released in MergeMeshes after meshing)
ret[0].mp = mp;
return ret;
}
Array<Array<PointIndex, PointIndex>> ipmap;
ipmap.SetSize(num_domains);
@ -51,9 +62,6 @@ namespace netgen
auto & md = ret[i];
md.domain = i+1;
if(mp.only3D_domain_nr && mp.only3D_domain_nr !=md.domain)
continue;
md.mp = mp;
md.mp.maxh = min2 (mp.maxh, mesh.MaxHDomain(md.domain));
@ -82,9 +90,6 @@ namespace netgen
if(dom==0)
continue;
if(mp.only3D_domain_nr && mp.only3D_domain_nr != dom)
continue;
auto & sels = ret[dom-1].mesh->SurfaceElements();
for(auto pi : sel.PNums())
ipmap[dom-1][pi] = 1;
@ -95,9 +100,6 @@ namespace netgen
// add used points to domain mesh, build point mapping
for(auto i : Range(ret))
{
if(mp.only3D_domain_nr && mp.only3D_domain_nr != ret[i].domain)
continue;
auto & m = *ret[i].mesh;
auto & pmap = ret[i].pmap;
@ -114,10 +116,8 @@ namespace netgen
for(auto i : Range(ret))
{
auto & imap = ipmap[i];
if(mp.only3D_domain_nr && mp.only3D_domain_nr != ret[i].domain)
continue;
auto & m = *ret[i].mesh;
for (auto & sel : m.SurfaceElements())
for(auto & pi : sel.PNums())
pi = imap[pi];
@ -134,7 +134,6 @@ namespace netgen
ret[i].connected_pairs.Append({imap[pi0], imap[pi1]});
}
}
// ret[i].mesh.Save("surface_"+ToString(i)+".vol");
}
return ret;
}
@ -145,9 +144,6 @@ namespace netgen
auto domain = md.domain;
MeshingParameters & mp = md.mp;
if(mp.only3D_domain_nr && mp.only3D_domain_nr != domain)
return;
int oldne;
if (multithread.terminate)
return;
@ -255,12 +251,6 @@ namespace netgen
auto domain = md.domain;
MeshingParameters & mp = md.mp;
if(mp.only3D_domain_nr && mp.only3D_domain_nr != domain)
return;
if (mp.delaunay && mesh.GetNOpenElements())
{
int oldne = mesh.GetNE();
@ -662,6 +652,16 @@ namespace netgen
{
// todo: optimize: count elements, alloc all memory, copy vol elements in parallel
static Timer t("MergeMeshes"); RegionTimer rt(t);
if(md.Size()==1)
{
// assume that mesh was never divided, no need to do anything
if(&mesh != md[0].mesh.get())
throw Exception("Illegal Mesh pointer in MeshingData");
md[0].mesh.release();
return;
}
for(auto & m_ : md)
{
auto first_new_pi = m_.pmap.Range().Next();