mesh_gen::anonymous_namespace{meshGenerator.cpp} Namespace Reference

Functions
void	writeGmshMsh22From2DTriangleMesh (const mesh::Mesh &m, const std::string &path)

Function Documentation

writeGmshMsh22From2DTriangleMesh()

void mesh_gen::anonymous_namespace{meshGenerator.cpp}::writeGmshMsh22From2DTriangleMesh	(	const mesh::Mesh &	m,
		const std::string &	path
	)

One-shot Gmsh 2.2 ASCII from filled 2D triangle mesh (nodes z=0; matches fillMeshFromActiveGmshModel).

Definition at line 31 of file meshGenerator.cpp.

                                                                                {
  if (m.getElementType() != util::vtk_type_triangle)
    throw std::runtime_error("writeGmshMsh22From2DTriangleMesh: only triangle meshes are supported.");
  if (m.getDimension() != 2)
    throw std::runtime_error("writeGmshMsh22From2DTriangleMesh: dimension must be 2.");
 
  const auto &nodes = m.getNodes();
  const auto &enc = m.getElementConnectivities();
  const size_t n = nodes.size();
  const size_t ne = enc.size() / 3;
 
  std::ofstream out(path);
  if (!out)
    throw std::runtime_error("writeGmshMsh22From2DTriangleMesh: cannot open " + path);
 
  out << std::setprecision(17);
  out << "$MeshFormat\n2.2 0 8\n$EndMeshFormat\n";
  out << "$Nodes\n" << n << "\n";
  for (size_t i = 0; i < n; ++i) {
    const auto &p = nodes[i];
    out << (i + 1) << " " << p.d_x << " " << p.d_y << " 0\n";
  }
  out << "$EndNodes\n";
  out << "$Elements\n" << ne << "\n";
  for (size_t e = 0; e < ne; ++e) {
    const size_t a = enc[3 * e] + 1;
    const size_t b = enc[3 * e + 1] + 1;
    const size_t c = enc[3 * e + 2] + 1;
    out << (e + 1) << " 2 2 0 1 " << a << " " << b << " " << c << "\n";
  }
  out << "$EndElements\n";
}

References mesh::Mesh::getDimension(), mesh::Mesh::getElementConnectivities(), mesh::Mesh::getElementType(), mesh::Mesh::getNodes(), util::vtk_type_triangle, and writeGmshMsh22From2DTriangleMesh().

Referenced by writeGmshMsh22From2DTriangleMesh().

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