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];
 
\comment{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);
 
\comment{read element connectivity}
connect = (int *) calloc(num_nod_per_el*num_el_in_blk,
                         sizeof(int));
 
error = ex_get_elem_conn(exoid, id, connect);
 
\comment{read element block attributes}
attrib = (float *) calloc (num_attr * num_el_in_blk, sizeof(float));
error = ex_get_elem_attr (exoid, id, attrib);
 
\comment{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);