fe_mesh_t* fe_mesh_from_mesh(mesh_t* fv_mesh,
string_array_t* element_block_tags)
{
fe_mesh_t* fe_mesh = fe_mesh_new(fv_mesh->comm, fv_mesh->num_nodes);
if ((element_block_tags != NULL) && (element_block_tags->size > 1))
{
// Block-by-block construction.
for (int b = 0; b < element_block_tags->size; ++b)
{
char* tag_name = element_block_tags->data[b];
size_t num_elem;
int* block_tag = mesh_tag(fv_mesh->cell_tags, tag_name, &num_elem);
int* num_elem_faces = polymec_malloc(sizeof(int) * num_elem);
int elem_faces_size = 0;
for (int i = 0; i < num_elem; ++i)
{
int nef = fv_mesh->cell_face_offsets[block_tag[i]+1] - fv_mesh->cell_face_offsets[block_tag[i]];
num_elem_faces[i] = nef;
elem_faces_size += nef;
}
int* elem_faces = polymec_malloc(sizeof(int) * elem_faces_size);
int offset = 0;
for (int i = 0; i < num_elem; ++i)
{
for (int f = 0; f < num_elem_faces[i]; ++f, ++offset)
elem_faces[offset+f] = fv_mesh->cell_faces[fv_mesh->cell_face_offsets[block_tag[i]+f]];
}
fe_block_t* block = polyhedral_fe_block_new((int)num_elem, num_elem_faces, fv_mesh->cell_faces);
fe_mesh_add_block(fe_mesh, tag_name, block);
polymec_free(num_elem_faces);
polymec_free(elem_faces);
}
}
else
{
// One honking block.
int num_elem = fv_mesh->num_cells;
int* num_elem_faces = polymec_malloc(sizeof(int) * num_elem);
for (int i = 0; i < num_elem; ++i)
num_elem_faces[i] = fv_mesh->cell_face_offsets[i+1] - fv_mesh->cell_face_offsets[i];
fe_block_t* block = polyhedral_fe_block_new(num_elem, num_elem_faces, fv_mesh->cell_faces);
fe_mesh_add_block(fe_mesh, "block_1", block);
polymec_free(num_elem_faces);
}
// Copy coordinates.
memcpy(fe_mesh_node_positions(fe_mesh), fv_mesh->nodes, sizeof(point_t) * fv_mesh->num_nodes);
return fe_mesh;
}
void test_write_poly_exodus_file(void** state)
{
fe_mesh_t* mesh = fe_mesh_new(MPI_COMM_WORLD, 14);
int num_elem_faces[3] = {5, 5, 7};
int elem_face_indices[] = {0, 1, 2, 3, 4, 3, 5, 6, 7, 8, 7, 9, 10, 11, 12, 13, 14};
fe_block_t* block = polyhedral_fe_block_new(3, num_elem_faces, elem_face_indices);
fe_mesh_add_block(mesh, "nfaced_1", block);
int num_face_nodes[15] = {2, 2, 3, 3, 3, 2, 2, 3, 3, 4, 4, 3, 3, 3, 3};
int face_nodes[] = {4, 5, 7, 1, 0, 3, 5, 1, 3, 7, 7, 3, 0, 4, 0, 1, 5, 4, 4, 7, 6, 0,
2, 3, 6, 7, 3, 2, 6, 2, 0, 4, 7, 3, 13, 9, 11, 6, 10, 8, 12, 2, 6, 7,
11, 10, 10, 11, 9, 8, 8, 9, 13, 12, 12, 13, 3, 2};
fe_mesh_set_face_nodes(mesh, 15, num_face_nodes, face_nodes);
point_t* X = fe_mesh_node_positions(mesh);
X[ 0].x = 0.0; X[ 0].y = 0.0; X[ 0].z = 0.0;
X[ 1].x = 2.0; X[ 1].y = 0.0; X[ 1].z = 0.0;
X[ 2].x = 0.0; X[ 2].y = 2.0; X[ 2].z = 0.0;
X[ 3].x = 2.0; X[ 3].y = 2.0; X[ 3].z = 0.0;
X[ 4].x = 0.0; X[ 4].y = 0.0; X[ 4].z = 2.0;
X[ 5].x = 2.0; X[ 5].y = 0.0; X[ 5].z = 2.0;
X[ 6].x = 0.0; X[ 6].y = 2.0; X[ 6].z = 2.0;
X[ 7].x = 2.0; X[ 7].y = 2.0; X[ 7].z = 2.0;
X[ 8].x = 0.0; X[ 8].y = 3.5; X[ 8].z = 1.0;
X[ 9].x = 2.0; X[ 9].y = 3.5; X[ 9].z = 1.0;
X[10].x = 0.0; X[10].y = 3.0; X[10].z = 1.0;
X[11].x = 2.0; X[11].y = 3.0; X[11].z = 1.0;
X[12].x = 0.0; X[12].y = 3.0; X[12].z = 0.5;
X[13].x = 2.0; X[13].y = 3.0; X[13].z = 0.5;
exodus_file_t* file = exodus_file_new(MPI_COMM_WORLD, "test-nfaced-2.exo");
assert_true(file != NULL);
exodus_file_set_title(file, "This is a test");
exodus_file_write_mesh(file, mesh);
exodus_file_close(file);
fe_mesh_free(mesh);
}
mesh_t* mesh_from_fe_mesh(fe_mesh_t* fe_mesh)
{
// Feel out the faces for the finite element mesh. Do we need to create
// them ourselves, or are they already all there?
int num_cells = fe_mesh_num_elements(fe_mesh);
int num_faces = fe_mesh_num_faces(fe_mesh);
int* cell_face_offsets = polymec_malloc(sizeof(int) * (num_cells + 1));
cell_face_offsets[0] = 0;
int* cell_faces = NULL;
int* face_node_offsets = NULL;
int* face_nodes = NULL;
if (num_faces == 0)
{
// Traverse the element blocks and figure out the number of faces per cell.
int pos = 0, elem_offset = 0;
char* block_name;
fe_block_t* block;
while (fe_mesh_next_block(fe_mesh, &pos, &block_name, &block))
{
int num_block_elem = fe_block_num_elements(block);
fe_mesh_element_t elem_type = fe_block_element_type(block);
int num_elem_faces = get_num_cell_faces(elem_type);
for (int i = 0; i < num_block_elem; ++i)
cell_face_offsets[elem_offset+i+1] = cell_face_offsets[elem_offset+i] + num_elem_faces;
elem_offset += num_block_elem;
}
// Now assemble the faces for each cell.
int_tuple_int_unordered_map_t* node_face_map = int_tuple_int_unordered_map_new();
cell_faces = polymec_malloc(sizeof(int) * cell_face_offsets[num_cells]);
// We build the face->node connectivity data on-the-fly.
int_array_t* face_node_offsets_array = int_array_new();
int_array_append(face_node_offsets_array, 0);
int_array_t* face_nodes_array = int_array_new();
pos = 0, elem_offset = 0;
while (fe_mesh_next_block(fe_mesh, &pos, &block_name, &block))
{
int num_block_elem = fe_block_num_elements(block);
fe_mesh_element_t elem_type = fe_block_element_type(block);
int num_elem_nodes = fe_block_num_element_nodes(block, 0);
int elem_nodes[num_elem_nodes];
for (int i = 0; i < num_block_elem; ++i)
{
fe_block_get_element_nodes(block, i, elem_nodes);
int offset = cell_face_offsets[elem_offset+i];
get_cell_faces(elem_type, elem_nodes, node_face_map,
&cell_faces[offset], face_node_offsets_array,
face_nodes_array);
}
elem_offset += num_block_elem;
}
// Record the total number of faces and discard the map.
num_faces = node_face_map->size;
int_tuple_int_unordered_map_free(node_face_map);
// Gift the contents of the arrays to our pointers.
face_node_offsets = face_node_offsets_array->data;
int_array_release_data_and_free(face_node_offsets_array);
face_nodes = face_nodes_array->data;
int_array_release_data_and_free(face_nodes_array);
}
else
{
// Fill in these arrays block by block.
int pos = 0;
char* block_name;
fe_block_t* block;
int block_cell_offset = 0;
while (fe_mesh_next_block(fe_mesh, &pos, &block_name, &block))
{
int num_block_elem = fe_block_num_elements(block);
for (int i = 0; i < num_block_elem; ++i)
cell_face_offsets[block_cell_offset+i] = cell_face_offsets[block_cell_offset+i-1] + block->elem_face_offsets[i];
block_cell_offset += num_block_elem;
}
cell_faces = polymec_malloc(sizeof(int) * cell_face_offsets[num_cells]);
pos = 0, block_cell_offset = 0;
while (fe_mesh_next_block(fe_mesh, &pos, &block_name, &block))
{
int num_block_elem = fe_block_num_elements(block);
memcpy(&cell_faces[cell_face_offsets[block_cell_offset]], block->elem_faces, sizeof(int) * block->elem_face_offsets[num_block_elem]);
block_cell_offset += num_block_elem;
}
// We just borrow these from the mesh. Theeenks!
face_node_offsets = fe_mesh->face_node_offsets;
face_nodes = fe_mesh->face_nodes;
}
ASSERT(cell_faces != NULL);
ASSERT(face_node_offsets != NULL);
ASSERT(face_nodes != NULL);
// Create the finite volume mesh and set up its cell->face and face->node
// connectivity.
int num_ghost_cells = 0; // FIXME!
mesh_t* mesh = mesh_new(fe_mesh_comm(fe_mesh),
num_cells, num_ghost_cells,
num_faces,
fe_mesh_num_nodes(fe_mesh));
memcpy(mesh->cell_face_offsets, cell_face_offsets, sizeof(int) * (mesh->num_cells+1));
memcpy(mesh->face_node_offsets, face_node_offsets, sizeof(int) * (mesh->num_faces+1));
mesh_reserve_connectivity_storage(mesh);
memcpy(mesh->cell_faces, cell_faces, sizeof(int) * (mesh->cell_face_offsets[mesh->num_cells]));
memcpy(mesh->face_nodes, face_nodes, sizeof(int) * (mesh->face_node_offsets[mesh->num_faces]));
// Set up face->cell connectivity.
for (int c = 0; c < mesh->num_cells; ++c)
{
for (int f = mesh->cell_face_offsets[c]; f < mesh->cell_face_offsets[c+1]; ++f)
{
int face = mesh->cell_faces[f];
if (mesh->face_cells[2*face] == -1)
mesh->face_cells[2*face] = c;
else
mesh->face_cells[2*face+1] = c;
}
}
// Set up face->edge connectivity and edge->node connectivity (if provided).
if (fe_mesh->face_edges != NULL)
{
memcpy(mesh->face_edge_offsets, fe_mesh->face_edge_offsets, sizeof(int) * (mesh->num_faces+1));
mesh->face_edges = polymec_malloc(sizeof(int) * fe_mesh->face_edge_offsets[mesh->num_faces]);
memcpy(mesh->face_edges, fe_mesh->face_edges, sizeof(int) * fe_mesh->face_edge_offsets[mesh->num_faces]);
}
else
{
// Construct edges if we didn't find them.
mesh_construct_edges(mesh);
}
// Copy the node positions into place.
memcpy(mesh->nodes, fe_mesh_node_positions(fe_mesh), sizeof(point_t) * mesh->num_nodes);
// Calculate geometry.
mesh_compute_geometry(mesh);
// Sets -> tags.
int pos = 0, *set;
size_t set_size;
char* set_name;
while (fe_mesh_next_element_set(fe_mesh, &pos, &set_name, &set, &set_size))
{
int* tag = mesh_create_tag(mesh->cell_tags, set_name, set_size);
memcpy(tag, set, sizeof(int) * set_size);
}
pos = 0;
while (fe_mesh_next_face_set(fe_mesh, &pos, &set_name, &set, &set_size))
{
int* tag = mesh_create_tag(mesh->face_tags, set_name, set_size);
memcpy(tag, set, sizeof(int) * set_size);
}
pos = 0;
while (fe_mesh_next_edge_set(fe_mesh, &pos, &set_name, &set, &set_size))
{
int* tag = mesh_create_tag(mesh->edge_tags, set_name, set_size);
memcpy(tag, set, sizeof(int) * set_size);
}
pos = 0;
while (fe_mesh_next_node_set(fe_mesh, &pos, &set_name, &set, &set_size))
{
int* tag = mesh_create_tag(mesh->node_tags, set_name, set_size);
memcpy(tag, set, sizeof(int) * set_size);
}
// Clean up.
polymec_free(cell_face_offsets);
polymec_free(cell_faces);
if (fe_mesh_num_faces(fe_mesh) == 0)
{
polymec_free(face_node_offsets);
polymec_free(face_nodes);
}
return mesh;
}
void test_write_exodus_file(void** state)
{
fe_mesh_t* mesh = fe_mesh_new(MPI_COMM_WORLD, 22);
int elem1_node_indices[] = {0, 1, 2, 3, 4, 5, 6, 7};
fe_block_t* block = fe_block_new(1, FE_HEXAHEDRON, 8, elem1_node_indices);
fe_mesh_add_block(mesh, "block_1", block);
int elem2_node_indices[] = {8, 9, 10, 11};
block = fe_block_new(1, FE_TETRAHEDRON, 4, elem2_node_indices);
fe_mesh_add_block(mesh, "block_2", block);
int elem3_node_indices[] = {12, 13, 14, 15, 16, 17};
block = fe_block_new(1, FE_WEDGE, 6, elem3_node_indices);
fe_mesh_add_block(mesh, "block_3", block);
int elem4_node_indices[] = {18, 19, 20, 21};
block = fe_block_new(1, FE_TETRAHEDRON, 4, elem4_node_indices);
fe_mesh_add_block(mesh, "block_4", block);
point_t* X = fe_mesh_node_positions(mesh);
X[ 0].x = 0.0; X[ 0].y = 0.0; X[ 0].z = 0.0;
X[ 1].x = 10.0; X[ 1].y = 0.0; X[ 1].z = 0.0;
X[ 2].x = 10.0; X[ 2].y = 0.0; X[ 2].z = -10.0;
X[ 3].x = 1.0; X[ 3].y = 0.0; X[ 3].z = -10.0;
X[ 4].x = 0.0; X[ 4].y = 10.0; X[ 4].z = 0.0;
X[ 5].x = 10.0; X[ 5].y = 10.0; X[ 5].z = 0.0;
X[ 6].x = 10.0; X[ 6].y = 10.0; X[ 6].z = -10.0;
X[ 7].x = 1.0; X[ 7].y = 10.0; X[ 7].z = -10.0;
X[ 8].x = 0.0; X[ 8].y = 0.0; X[ 8].z = 0.0;
X[ 9].x = 1.0; X[ 9].y = 0.0; X[ 9].z = 5.0;
X[10].x = 10.0; X[10].y = 0.0; X[10].z = 2.0;
X[11].x = 7.0; X[11].y = 5.0; X[11].z = 3.0;
X[12].x = 3.0; X[12].y = 0.0; X[12].z = 6.0;
X[13].x = 6.0; X[13].y = 0.0; X[13].z = 0.0;
X[14].x = 0.0; X[14].y = 0.0; X[14].z = 0.0;
X[15].x = 3.0; X[15].y = 2.0; X[15].z = 6.0;
X[16].x = 6.0; X[16].y = 2.0; X[16].z = 2.5;
X[17].x = 2.0; X[17].y = 2.0; X[17].z = 0.0;
X[18].x = 2.7; X[18].y = 1.7; X[18].z = 2.7;
X[19].x = 6.0; X[19].y = 1.7; X[19].z = 3.3;
X[20].x = 5.7; X[20].y = 1.7; X[20].z = 1.7;
X[21].x = 3.7; X[21].y = 0.0; X[21].z = 2.3;
// Node sets.
int* ns1 = fe_mesh_create_node_set(mesh, "nset_1", 5);
ns1[0] = 1; ns1[1] = 2; ns1[2] = 3; ns1[3] = 4; ns1[4] = 5;
int* ns2 = fe_mesh_create_node_set(mesh, "nset_2", 3);
ns2[0] = 11; ns2[1] = 12; ns2[2] = 13;
// Side set.
int* ss1 = fe_mesh_create_side_set(mesh, "sset_1", 1);
ss1[0] = 0; ss1[1] = 5;
exodus_file_t* file = exodus_file_new(MPI_COMM_WORLD, "test-3d.exo");
assert_true(file != NULL);
exodus_file_set_title(file, "This is a test");
exodus_file_write_mesh(file, mesh);
exodus_file_close(file);
fe_mesh_free(mesh);
}
fe_mesh_t* exodus_file_read_mesh(exodus_file_t* file)
{
// Create the "host" FE mesh.
fe_mesh_t* mesh = fe_mesh_new(file->comm, file->num_nodes);
// Count up the number of polyhedral blocks.
int num_poly_blocks = 0;
for (int i = 0; i < file->num_elem_blocks; ++i)
{
int elem_block = file->elem_block_ids[i];
char elem_type_name[MAX_NAME_LENGTH+1];
int num_elem, num_nodes_per_elem, num_faces_per_elem;
ex_get_block(file->ex_id, EX_ELEM_BLOCK, elem_block,
elem_type_name, &num_elem,
&num_nodes_per_elem, NULL,
&num_faces_per_elem, NULL);
fe_mesh_element_t elem_type = get_element_type(elem_type_name);
if (elem_type == FE_POLYHEDRON)
++num_poly_blocks;
}
// If we have any polyhedral element blocks, we read a single face
// block that incorporates all of the polyhedral elements.
if (num_poly_blocks > 0)
{
// Dig up the face block corresponding to this element block.
char face_type[MAX_NAME_LENGTH+1];
int num_faces, num_nodes;
ex_get_block(file->ex_id, EX_FACE_BLOCK, file->face_block_ids[0], face_type, &num_faces,
&num_nodes, NULL, NULL, NULL);
if (string_ncasecmp(face_type, "nsided", 6) != 0)
{
fe_mesh_free(mesh);
ex_close(file->ex_id);
polymec_error("Invalid face type for polyhedral element block.");
}
// Find the number of nodes for each face in the block.
int* num_face_nodes = polymec_malloc(sizeof(int) * num_faces);
ex_get_entity_count_per_polyhedra(file->ex_id, EX_FACE_BLOCK,
file->face_block_ids[0],
num_face_nodes);
// Read face->node connectivity information.
int face_node_size = 0;
for (int i = 0; i < num_faces; ++i)
face_node_size += num_face_nodes[i];
int* face_nodes = polymec_malloc(sizeof(int) * face_node_size);
ex_get_conn(file->ex_id, EX_FACE_BLOCK, 1, face_nodes, NULL, NULL);
for (int i = 0; i < face_node_size; ++i)
face_nodes[i] -= 1;
fe_mesh_set_face_nodes(mesh, num_faces, num_face_nodes, face_nodes);
// Clean up.
polymec_free(num_face_nodes);
}
// Go over the element blocks and feel out the data.
for (int i = 0; i < file->num_elem_blocks; ++i)
{
int elem_block = file->elem_block_ids[i];
char elem_type_name[MAX_NAME_LENGTH+1];
int num_elem, num_nodes_per_elem, num_faces_per_elem;
ex_get_block(file->ex_id, EX_ELEM_BLOCK, elem_block,
elem_type_name, &num_elem,
&num_nodes_per_elem, NULL,
&num_faces_per_elem, NULL);
// Get the type of element for this block.
fe_mesh_element_t elem_type = get_element_type(elem_type_name);
fe_block_t* block = NULL;
char block_name[MAX_NAME_LENGTH+1];
if (elem_type == FE_POLYHEDRON)
{
// Find the number of faces for each element in the block.
int* num_elem_faces = polymec_malloc(sizeof(int) * num_elem);
ex_get_entity_count_per_polyhedra(file->ex_id, EX_ELEM_BLOCK, elem_block,
num_elem_faces);
// Get the element->face connectivity.
int elem_face_size = 0;
for (int j = 0; j < num_elem; ++j)
elem_face_size += num_elem_faces[j];
int* elem_faces = polymec_malloc(sizeof(int) * elem_face_size);
ex_get_conn(file->ex_id, EX_ELEM_BLOCK, elem_block, NULL, NULL, elem_faces);
// Subtract 1 from each element face.
for (int j = 0; j < elem_face_size; ++j)
elem_faces[j] -= 1;
// Create the element block.
block = polyhedral_fe_block_new(num_elem, num_elem_faces, elem_faces);
}
else if (elem_type != FE_INVALID)
{
// Get the element's nodal mapping.
int* node_conn = polymec_malloc(sizeof(int) * num_elem * num_nodes_per_elem);
ex_get_conn(file->ex_id, EX_ELEM_BLOCK, elem_block, node_conn, NULL, NULL);
// Subtract 1 from each element node.
for (int j = 0; j < num_elem * num_nodes_per_elem; ++j)
node_conn[j] -= 1;
// Build the element block.
block = fe_block_new(num_elem, elem_type, num_nodes_per_elem, node_conn);
}
else
{
fe_mesh_free(mesh);
ex_close(file->ex_id);
polymec_error("Block %d contains an invalid (3D) element type.", elem_block);
}
// Fish out the element block name if it has one, or make a default.
ex_get_name(file->ex_id, EX_ELEM_BLOCK, elem_block, block_name);
if (strlen(block_name) == 0)
sprintf(block_name, "block_%d", elem_block);
// Add the element block to the mesh.
fe_mesh_add_block(mesh, block_name, block);
}
// Fetch node positions and compute geometry.
real_t x[file->num_nodes], y[file->num_nodes], z[file->num_nodes];
ex_get_coord(file->ex_id, x, y, z);
point_t* X = fe_mesh_node_positions(mesh);
for (int n = 0; n < file->num_nodes; ++n)
{
X[n].x = x[n];
X[n].y = y[n];
X[n].z = z[n];
}
// Fetch sets of entities.
for (int i = 1; i <= file->num_elem_sets; ++i)
fetch_set(file, EX_ELEM_SET, i, mesh, fe_mesh_create_element_set);
for (int i = 1; i <= file->num_face_sets; ++i)
fetch_set(file, EX_FACE_SET, i, mesh, fe_mesh_create_face_set);
for (int i = 1; i <= file->num_edge_sets; ++i)
fetch_set(file, EX_EDGE_SET, i, mesh, fe_mesh_create_edge_set);
for (int i = 1; i <= file->num_node_sets; ++i)
fetch_set(file, EX_NODE_SET, i, mesh, fe_mesh_create_node_set);
for (int i = 1; i <= file->num_side_sets; ++i)
fetch_set(file, EX_SIDE_SET, i, mesh, fe_mesh_create_side_set);
return mesh;
}
void exodus_file_write_mesh(exodus_file_t* file,
fe_mesh_t* mesh)
{
ASSERT(file->writing);
// See whether we have polyhedral blocks, and whether the non-polyhedral
// blocks have supported element types.
int num_blocks = fe_mesh_num_blocks(mesh);
bool is_polyhedral = false;
int pos = 0;
char* block_name;
fe_block_t* block;
while (fe_mesh_next_block(mesh, &pos, &block_name, &block))
{
fe_mesh_element_t elem_type = fe_block_element_type(block);
if (elem_type == FE_POLYHEDRON)
{
is_polyhedral = true;
break;
}
else if (elem_type != FE_INVALID)
{
// Check the number of nodes for the element.
if (!element_is_supported(elem_type, fe_block_num_element_nodes(block, 0)))
polymec_error("exodus_file_write_mesh: Element type in block %s has invalid number of nodes.", block_name);
}
else
polymec_error("exodus_file_write_mesh: Invalid element type for block %s.", block_name);
}
// Write out information about elements, faces, edges, nodes.
file->num_nodes = fe_mesh_num_nodes(mesh);
ex_init_params params;
strcpy(params.title, file->title);
params.num_dim = 3;
params.num_nodes = file->num_nodes;
int num_edges = fe_mesh_num_edges(mesh);
params.num_edge = num_edges;
params.num_edge_blk = 0;
int num_faces = fe_mesh_num_faces(mesh);
params.num_face = num_faces;
params.num_face_blk = (is_polyhedral) ? 1 : 0;
int num_elem = fe_mesh_num_elements(mesh);
params.num_elem = num_elem;
params.num_elem_blk = num_blocks;
params.num_elem_sets = file->num_elem_sets = fe_mesh_num_element_sets(mesh);
params.num_face_sets = file->num_face_sets = fe_mesh_num_face_sets(mesh);
params.num_edge_sets = file->num_edge_sets = fe_mesh_num_edge_sets(mesh);
params.num_node_sets = file->num_node_sets = fe_mesh_num_node_sets(mesh);
params.num_side_sets = file->num_side_sets = fe_mesh_num_side_sets(mesh);
params.num_elem_maps = 0;
params.num_face_maps = 0;
params.num_edge_maps = 0;
params.num_node_maps = 0;
ex_put_init_ext(file->ex_id, ¶ms);
// If we have any polyhedral element blocks, we write out a single face
// block that incorporates all of the polyhedral elements.
if (is_polyhedral)
{
// Generate face->node connectivity information.
int num_pfaces = fe_mesh_num_faces(mesh);
int face_node_size = 0;
int num_face_nodes[num_pfaces];
for (int f = 0; f < num_pfaces; ++f)
{
int num_nodes = fe_mesh_num_face_nodes(mesh, f);
num_face_nodes[f] = num_nodes;
face_node_size += num_nodes;
}
int* face_nodes = polymec_malloc(sizeof(int) * face_node_size);
int offset = 0;
for (int f = 0; f < num_pfaces; ++f)
{
fe_mesh_get_face_nodes(mesh, f, &face_nodes[offset]);
offset += num_face_nodes[f];
}
for (int i = 0; i < face_node_size; ++i)
face_nodes[i] += 1;
// Write an "nsided" face block.
ex_put_block(file->ex_id, EX_FACE_BLOCK, 1, "nsided",
num_pfaces, face_node_size, 0, 0, 0);
ex_put_name(file->ex_id, EX_FACE_BLOCK, 1, "face_block");
ex_put_conn(file->ex_id, EX_FACE_BLOCK, 1, face_nodes, NULL, NULL);
// Clean up.
polymec_free(face_nodes);
// Number of nodes per face.
ex_put_entity_count_per_polyhedra(file->ex_id, EX_FACE_BLOCK,
1, num_face_nodes);
}
// Go over the element blocks and write out the data.
pos = 0;
while (fe_mesh_next_block(mesh, &pos, &block_name, &block))
{
int elem_block = pos;
int num_e = fe_block_num_elements(block);
fe_mesh_element_t elem_type = fe_block_element_type(block);
if (elem_type == FE_POLYHEDRON)
{
// Count up the faces in the block and write the block information.
int tot_num_elem_faces = 0;
int faces_per_elem[num_e];
for (int i = 0; i < num_e; ++i)
{
faces_per_elem[i] = fe_block_num_element_faces(block, i);
tot_num_elem_faces += faces_per_elem[i];
}
ex_put_block(file->ex_id, EX_ELEM_BLOCK, elem_block, "nfaced",
num_e, 0, 0, tot_num_elem_faces, 0);
// Write elem->face connectivity information.
int elem_faces[tot_num_elem_faces], offset = 0;
for (int i = 0; i < num_e; ++i)
{
fe_block_get_element_faces(block, i, &elem_faces[offset]);
offset += faces_per_elem[i];
}
for (int i = 0; i < tot_num_elem_faces; ++i)
elem_faces[i] += 1;
ex_put_conn(file->ex_id, EX_ELEM_BLOCK, elem_block, NULL, NULL, elem_faces);
ex_put_entity_count_per_polyhedra(file->ex_id, EX_ELEM_BLOCK, elem_block, faces_per_elem);
}
else if (elem_type != FE_INVALID)
{
// Get element information.
char elem_type_name[MAX_NAME_LENGTH+1];
get_elem_name(elem_type, elem_type_name);
int num_nodes_per_elem = fe_block_num_element_nodes(block, 0);
// Write the block.
ex_put_block(file->ex_id, EX_ELEM_BLOCK, elem_block, elem_type_name,
num_e, num_nodes_per_elem, 0, 0, 0);
// Write the elem->node connectivity.
int elem_nodes[num_e* num_nodes_per_elem], offset = 0;
for (int i = 0; i < num_e; ++i)
{
fe_block_get_element_nodes(block, i, &elem_nodes[offset]);
offset += num_nodes_per_elem;
}
for (int i = 0; i < num_e* num_nodes_per_elem; ++i)
elem_nodes[i] += 1;
ex_put_conn(file->ex_id, EX_ELEM_BLOCK, elem_block, elem_nodes, NULL, NULL);
}
// Set the element block name.
ex_put_name(file->ex_id, EX_ELEM_BLOCK, elem_block, block_name);
}
// Set node positions.
real_t x[file->num_nodes], y[file->num_nodes], z[file->num_nodes];
point_t* X = fe_mesh_node_positions(mesh);
for (int n = 0; n < file->num_nodes; ++n)
{
x[n] = X[n].x;
y[n] = X[n].y;
z[n] = X[n].z;
}
ex_put_coord(file->ex_id, x, y, z);
char* coord_names[3] = {"x", "y", "z"};
ex_put_coord_names(file->ex_id, coord_names);
// Write sets of entities.
int *set, set_id = 0;
size_t set_size;
char* set_name;
pos = set_id = 0;
while (fe_mesh_next_element_set(mesh, &pos, &set_name, &set, &set_size))
write_set(file, EX_ELEM_SET, ++set_id, set_name, set, set_size);
pos = set_id = 0;
while (fe_mesh_next_face_set(mesh, &pos, &set_name, &set, &set_size))
write_set(file, EX_FACE_SET, ++set_id, set_name, set, set_size);
pos = set_id = 0;
while (fe_mesh_next_edge_set(mesh, &pos, &set_name, &set, &set_size))
write_set(file, EX_EDGE_SET, ++set_id, set_name, set, set_size);
pos = set_id = 0;
while (fe_mesh_next_node_set(mesh, &pos, &set_name, &set, &set_size))
write_set(file, EX_NODE_SET, ++set_id, set_name, set, set_size);
pos = set_id = 0;
while (fe_mesh_next_side_set(mesh, &pos, &set_name, &set, &set_size))
write_set(file, EX_SIDE_SET, ++set_id, set_name, set, set_size);
}
