MC absolute coordinates?

[abeall webforumsuser@macromedia.com]

When you have nested MCs, the coordinates of a nested MC will be relative where it is in relation to the reg point of its parent MC. Is there a way to get the absolute _x and _y coordinates of a nested MC? In other words, find out where the reg point of an MC falls on the _root timeline even when it's nested?

TIA

-beally-
-------------------------
"Senior Member" - experienced at messing things up
CurrentProject - feedback appreciated

[abeall webforumsuser@macromedia.com]

UPDATE

the obvious solution would be to add the parent coordinates to the child coordinates, and the sum should be the child's _root coordinates. The problem is, if the parent is rotated, the child(if not directly at reg point of parent) will be moved on the _root but not on the parent, so the above wont work. I have figured out a really round about way to counter this using calculus, but is there no absolute coordinates function?

-beally-
-------------------------
"Senior Member" - experienced at messing things up
CurrentProject - feedback appreciated

[Bertrand Saint-Guillain]

"abeall" [email]webforumsuser@macromedia.com[/email] wrote:
Q > When you have nested MCs, the coordinates of a
nested MC will be relative where it is in relation to
the reg point of its parent MC. Is there a way to get the
absolute _x and _y coordinates of a nested MC? In other
words, find out where the reg point of an MC falls on
the _root timeline even when it's nested?


A : check MovieClip's localToGlobal method

In your case the solution would be - provided that your root is
not scaled nor moved - something like for instance :

var p={x:0,y:0};
parentMc.anotherMc.mc.localToGlobal(p);

// or

var path = parentMc.anotherMc;
var myMc = path.mc;
var p={x:myMc._x,y:myMc._y};
parentMc.anotherMc.localToGlobal(p);

then to retrieve these absolute coordinates in any mc
coordinate space:
anyMc.globalToLocal(p);

you could also try something like:

MovieClip.prototype.getAbsoluteCoordinates = function () {
var p= { x : this._x , y : this._y };
this._parent.localToGlobal(p);
return p;
};
MovieClip.prototype.getLocalCoordinates =
function (/*MovieClip*/ targetMc) {
var p= { x : this._x , y : this._y };
this._parent.localToGlobal(p);
targetMc.globalToLocal(p);
return p;
};

// sample code:
d.onEnterFrame=function() {
var p = a.b.getLocalCoordinates(d);
d.c._x=p.x;
d.c._y=p.y;
};
// on the root timeline clip b is nested in clip a
// and clip c is nested in clip d
// suppose b has a motion tween within a
// both a and d can be rotated and/or scaled
// and/or skewed and
// no matter how deep mc's are nested


NB: getBounds doesn't answer specifically your question but
is in some way related since it takes a "target
coordinate space" parameter, you couldn't achieve the
same result - but it might be useful.

HTH,

--
Bertrand Saint-Guillain
[url]http://www.supersatori.com/[/url]

[abeall webforumsuser@macromedia.com]

hey

still haven't gotten around to trying this idea out, it looks complex, but I'll give it a shot.

let me see if I get this. the localToGlobal method takes a point object, and will convert it to a global point?

I'll try it out, thanks

-beally-
-------------------------
"Senior Member" - experienced at messing things up
CurrentProject - feedback appreciated