Suppose I saved a UDM (User Defined Memory) variable in each face. Then I loop over the threads and faces to find the minimal of that variable: thread_loop_f(t, domain) {

begin_f_loop(f, t)

{

/* find and record the thread and face where the minimal exists */

tt = t;

ff = f;

}

end_f_loop(f,t) }

Here tt and ff are the same type as t and f, respectively. I am trying to use tt and ff to record the interested face and want to use them out of the loop. But it did not work. Is it because that "Thread *" and "face_t" are not like Integer of Real and they can not be assigned to another variable directly? Anybody has done similar thing and any suggestion? Thanks,

Zhang

Can you do what you want within the loop using the "if........else"? I have not faced such problems. Can user define a global variables in UDF or just a UDF "global" variables.? I'm interesting in it. Could you email to me and tell me something detail?

Joey