Hi!

I want to use UDF to realize a wing's rotating. The C program as follow:

#include "udf.h" #include <stdio.h> #define PI 3.1415926 DEFINE_CG_MOTION(wing,dt,vel,omega,time,dtime) {

Thread *t;

face_t f;

real ome;

NV_S (vel, = , 0.0);

NV_S (omega, = ,0.0);

if (!Data_Valid_P () )

return;

t = DT_THREAD (dt);

ome = 10*PI*PI*sin(10*PI*time);

Message ("time=%f,omega=%f\n",time,ome);

omega[0] = ome; } But I can't realized it ! what's wrong with the UDF compile???

thanks a lot lyf

Compare with UDF Help 4.5.1

In first line, for #define..#include is not reqd. Check it out.

Mahesh