10 #include "xdmf_mesh.h"
11 #include "xdmf_utils.h"
12 #include <dolfinx/common/MPI.h>
13 #include <dolfinx/mesh/MeshTags.h>
17 #include <xtl/xspan.hpp>
23 namespace xdmf_meshtags
28 void add_meshtags(MPI_Comm comm,
const mesh::MeshTags<T>& meshtags,
29 pugi::xml_node& xml_node,
const hid_t h5_id,
30 const std::string name)
33 assert(meshtags.mesh());
34 std::shared_ptr<const mesh::Mesh> mesh = meshtags.mesh();
35 const int dim = meshtags.dim();
37 const std::int32_t num_local_entities
38 = mesh->topology().index_map(dim)->size_local();
41 const int num_active_entities
42 = std::lower_bound(meshtags.indices().begin(), meshtags.indices().end(),
44 - meshtags.indices().begin();
46 const std::string path_prefix =
"/MeshTags/" + name;
48 comm, xml_node, h5_id, path_prefix, mesh->topology(), mesh->geometry(),
50 xtl::span<const std::int32_t>(meshtags.indices().data(),
51 num_active_entities));
54 pugi::xml_node attribute_node = xml_node.append_child(
"Attribute");
55 assert(attribute_node);
56 attribute_node.append_attribute(
"Name") = name.c_str();
57 attribute_node.append_attribute(
"AttributeType") =
"Scalar";
58 attribute_node.append_attribute(
"Center") =
"Cell";
60 std::int64_t global_num_values = 0;
61 const std::int64_t local_num_values = num_active_entities;
62 MPI_Allreduce(&local_num_values, &global_num_values, 1, MPI_INT64_T, MPI_SUM,
64 const std::int64_t num_local = num_active_entities;
65 std::int64_t offset = 0;
66 MPI_Exscan(&num_local, &offset, 1, dolfinx::MPI::mpi_type<std::int64_t>(),
69 xdmf_utils::add_data_item(
70 attribute_node, h5_id, path_prefix +
"/Values",
71 xtl::span<const T>(meshtags.values().data(), num_active_entities), offset,
72 {global_num_values, 1},
"", use_mpi_io);
int size(MPI_Comm comm)
Return size of the group (number of processes) associated with the communicator.
Definition: MPI.cpp:82
void add_topology_data(MPI_Comm comm, pugi::xml_node &xml_node, const hid_t h5_id, const std::string path_prefix, const mesh::Topology &topology, const mesh::Geometry &geometry, const int cell_dim, const xtl::span< const std::int32_t > &active_entities)
Add Topology xml node.
Definition: xdmf_mesh.cpp:19