Wow..wow..i'll try the code, tnx again alll! yaaayy yaaaayy yaaayy 8)

Ok it works! Yahoo!

But...(not again )..

since this is my 1st time to use trace, i dont know what vectors to input so it traces from its front.

I put:
action car
{
while(1)
{
vec_set(myfront,my.pos);
myfront.x += 10;
trace(my.pos,myfront);
etc...........................

I know x is front. But when i run, it doesn't change when the car is turning.
it uses the world position 'x', not local position 'x'. Oh no! what do i do?
Forgive me for being a bad programmer.