HELP PLEASE...moving movie clip using averages

[ravenchaos]

In flash, I am trying to get a movie clip/object to move to the average between two other objects. In other words, I have dot A (pa) and dot C (pc) and as I move them, I want dot B (pb) to be dead center of the two...can anyone help me figure out how to do this? Here is the script I have so far, and commented out on the bottom is the formula I need, but don't know how to get to work:

pa.onPress = function() {
this.startDrag(false,
_root.groove_1_mc._x,
_root.groove_1_mc._y - 382,
_root.groove_1_mc._x,
_root.groove_1_mc._y);

};
pa.onRelease = function() {
stopDrag();
};

pc.onPress = function() {
this.startDrag(false,
_root.groove_2_mc._x,
_root.groove_2_mc._y - 382,
_root.groove_2_mc._x,
_root.groove_2_mc._y);
};
pc.onRelease = function() {
stopDrag();
};

var pax = pa._x;
var pay = pa._y;
var pcx = pc._x;
var pcy = pc._y;
var cax = pcx - pax;
var cay = pcy - pay;


this.createEmptyMovieClip("cnt", 1000);
cnt.lineStyle(2, 0xFFFFFF, 100);
cnt.moveTo(pa._x, pa._y);
cnt.lineTo(pc._x, pc._y);
cnt.lineTo(pa._x, pa._y);
cnt.moveTo(pa._x, pa._y);

//pb.y (green dot) needs to be equal to the y axis of pa (left red dot) plus the y axis of pc (right red dot) divided by 2
//pb.y = (pa._y + pc._y)/2;
//pb.x (green dot) needs to be equal to the x axis of pa (left red dot) plus the x axis of pc (right red dot) divided by 2
//pb.x = (pa._x + pc._x)/2;

 

[kennethkawamoto]

pb.onEnterFrame = function() {
	with (this) {
		_x = (pa._x+pc._x)/2;
		_y = (pa._y+pc._y)/2;
	}
};

Kenneth Kawamoto

http://www.materiaprima.co.uk