.
.
while(entCar != NULL)
{
if(key_pressed(key_for_str("cuu")) || key_pressed(key_for_str("cud")))
{
pXcon_setwheel(entFrontLeftWheel, 0, (key_cuu - key_cud)*100000*time_step, 0);
pXcon_setwheel(entFrontRightWheel, 0, (key_cuu - key_cud)*100000*time_step, 0);
pXcon_setwheel(entBackLeftWheel, 0, (key_cuu - key_cud)*100000*time_step, 0);
pXcon_setwheel(entBackRightWheel, 0, (key_cuu - key_cud)*100000*time_step, 0);
}
if(key_pressed(key_for_str("cul")) || key_pressed(key_for_str("cur")))
{
pXcon_setwheel(entFrontLeftWheel, 0, (key_cur - key_cul)*100000*time_step, 0);
pXcon_setwheel(entFrontRightWheel, 0, (key_cur - key_cul)*-100000*time_step, 0);
pXcon_setwheel(entBackLeftWheel, 0, (key_cur - key_cul)*100000*time_step, 0);
pXcon_setwheel(entBackRightWheel, 0, (key_cur - key_cul)*-100000*time_step, 0);
}
wait(1);
}
.
.