Exodus 7.21

Functions
ex_get_elem_block.c File Reference
`#include "exodusII.h"`

## Functions
int | ex_get_elem_block (int exoid, ex_entity_id elem_blk_id, char *elem_type, void_int *num_elem_this_blk, void_int *num_nodes_per_elem, void_int *num_attr)

## Function Documentation

## ◆ ex_get_elem_block()

int ex_get_elem_block | ( | int | exoid,
|  | ex_entity_id | elem_blk_id,
|  | char * | elem_type,
|  | void_int * | num_elem_this_blk,
|  | void_int * | num_nodes_per_elem,
|  | void_int * | num_attr
| ) |  |

Deprecated:
  Use ex_get_block()(exoid, EX_ELEM_BLOCK, elem_blk_id, elem_type, num_elem_this_blk, num_nodes_per_elem, NULL, NULL, num_attr) instead

The function ex_get_elem_block() reads the parameters used to describe an element block. IDs of all element blocks stored can be determined by calling ex_get_elem_blk_ids().

Returns
  In case of an error, ex_get_elem_block() returns a negative number; a warning will return a positive number. Possible causes of errors include:
  - data file not properly opened with call to ex_create() or ex_open()
  - element block with specified ID is not stored in the data file.

Parameters

  [in] | exoid | exodus file ID returned from a previous call to ex_create() or ex_open().
  [in] | elem_blk_id | The element block ID.
  [out] | elem_type | Returned element typetype of elements in the element block. The maximum length of this string is `MAX_STR_LENGTH` .
  [out] | num_elem_this_blk | Returned number of elements in the element block.
  [out] | num_nodes_per_elem | Returned number of nodes per element in the element block.
  [out] | num_attr | Returned number of attributes per element in the element block.

As an example, the following code segment will read the parameters for the element block with an ID of 10 and read the connectivity and element attributes arrays from an open exodus file :

#include "exodusII.h"
int id, error, exoid, num_el_in_blk, num_nod_per_el, num_attr,
*connect;
float *attrib;
char elem_type[MAX_STR_LENGTH+1];
/* read element block parameters */
id = 10;
error = ex_get_elem_block(exoid, id, elem_type, &num_el_in_blk,
&num_nod_per_elem, &num_attr);
/* read element connectivity */
connect = (int *) calloc(num_nod_per_el*num_el_in_blk,
sizeof(int));
error = ex_get_elem_conn(exoid, id, connect);
/* read element block attributes */
attrib = (float *) calloc (num_attr * num_el_in_blk, sizeof(float));
error = ex_get_elem_attr (exoid, id, attrib);
/* Same result using non-deprecated functions */
error = ex_get_block(exoid, EX_ELEM_BLOCK, id, elem_type, &num_el_in_blk,
&num_nod_per_elem, 0, 0, &num_attr);
error = ex_get_conn (exoid, EX_ELEM_BLOCK, id, connect);
error = ex_get_attr (exoid, EX_ELEM_BLOCK, id, attrib);