On the first frame (and currently the only frame) of my main timeline I have the following code
[AS]
_root.plane.onEnterFrame = function() {
_y += gravity;
if (Key.isDown(Key.LEFT)) {
_x -= 1;
_rotation = -5;
} else {
_rotation = 0;
}
if (Key.isDown(Key.RIGHT)) {
_x += 5;
_rotation = 3;
} else {
_x += 2;
}
};
[/AS]
This works fine until I place more stuff on the stage and everything starts to follow the function. I have tried it with and without the _root. Now if I put a [AS]this[/AS] before each property it works fine. why is that? if this code is being place on the plane?
I am still new to writting my code this way - any help in undesrstanding would be appreciated.
By calling _root.plane.onEnterFrame you are assign all actions in that function to the movie clip with the instance name “plane” (no quotes) on the _root timeline. So you would need to use “this” instead of _root.
If you want to use the same actions on multiple clips then you will have to define the actions in a function or a prototype that can be called by each individual clip. If you want to do that, check out these tutorials…
Yep, basically, properties (and more generally variables), when put just like that in functions, refer to the current timeline. In your case _root. Putting this. in front of the properties make them relative to object calling the function, in your case plane.
