Hello Madam or Sir,
I am the user of OpenMesh, and I want ask some questions about the parallel code with OpenMesh, exactly, the parallel code is based on OpenMP on the VS2013.
The first question: When I use the OpenMP on the VS2013 to speed up the program which write with OpenMesh, for example, I add the code: #pragma omp parallel for num_threads(7) , just like the following:
and the errors follow, and I do not know why.
and the second question: Could the code with iterator of OpenMesh be paralleled by OpenMP just like " for (TriMesh::FaceIter f_it = mesh.faces_begin(); f_it != mesh.faces_end(); f_it++) " in the above picture? or How can I parallel the code with iterator of OpenMesh?
Thank you for your time! And I am looking forward to your reply.
Sincerely
LuWang
Hi,
I am new and recently started to play with OpenMesh. I would like to
subdivide a triangle mesh based on midpoint criteria. It is required that
the subdivided mesh has the same geometry as the original one. No geometry
loss!
I read a STL mesh and tried to use the uniform subdivider:
___________________________________________________________________
struct CustomTraits : public OpenMesh::DefaultTraitsDouble { };
typedef OpenMesh::TriMesh_ArrayKernelT<CustomTraits> OM_TriMesh;
OM_TriMesh om_mesh;
OpenMesh::IO::read_mesh( om_mesh, fname_in);
int n_refine = 1;
OpenMesh::Subdivider::Uniform::MidpointT<OM_TriMesh> divider;
divider.attach(om_mesh);
divider(n_refine);
divider.detach();
OpenMesh::IO::write_mesh( om_mesh , fname_out);
____________________________________________________________________
Conceptually, I supposed it would uniformly divide one triangle into four
triangles after connecting its edge midpoints. However, I found it was not
true and the subdivided mesh is geometrically not exactly the same as the
original one.
In addition, for a simple mesh with only 1 triangle(stl format), I found
that only the central triangle connected with midpoints is generated and
triangles associated with the original vertices are lost. I looked at the
source code, and found that it was caused by the "if (!_m.is_boundary(vh))"
check. So it seems the boundary vertices are ignored. Then the geometry
after subdivision became different from the original mesh. Is it true? Can
anyone help and tell me how to do that? Thank you very much.
Best,
Xujun
