Movement with speed control

[hutchings]

How would I create car movements with speed control?
I tried following THIS Tutorial. But when I play the movie/game, it only rotates my car. It wont go forward.


I have my Fla.

[jbum]

Your problem is that the speed variable was never initialized. Add this to the top of your script to fix it.

code:

---

onClipEvent(load)

{

	speed =0 ;

}

---

I diagnosed this by adding a trace statement to your existing code:

trace(speed);

I saw this in the output window:

NaN
NaN
NaN
NaN
NaN
...

'NaN' means 'not a number' and it meant that something about the speed calculation involved a non-numeric variable.

Since the speed variable was undefined, and all the calculations on it referred to it, they were all invalid and producing a NaN result.

In other words, if x is undefined then "x + 2" is also undefined.

[hutchings]

Does everybody in the forums give answer like this?
Man! Soooo helpful.
Thanks!

[jbum]

Some of us do, yes. I tend to write very, uh, complete answers when I've had too much coffee.

You can thank the Starbucks establishment

[hutchings]

LOL