Finding the angle of a movie clip

[thawfeekyahya]

Wat's the difference between to find angles of two points which is
(x1,x2) and the other point be (_xmouse,_ymouse).

To find the angles we subtract from one point to the other

like
method 1:

target x = (_xmouse - mc._x)
target y= (_ymouse - mc._y)

method 2:

target x = (mc._x - _xmouse)
target y = (mc._y - ymouse)

wat's the difference between with this two methods

wen i implement with this target x and y values to Math.atan2(y,x)

i am getting different results

does this two have any major difference????

i get the error especially in this program--------->
_________________________________


var spring:Number = 0.1;
var friction:Number = 0.9;
var springLength:Number = 75;
var vx:Number = 0;
var vy:Number = 0;

onEnterFrame = function () {
var dx:Number = ball._x - _xmouse;
var dy:Number = ball._y - _ymouse;
var angle:Number = Math.atan2(dy, dx);
var targetX:Number = _xmouse + Math.cos(angle) * springLength;
var targetY:Number = _ymouse + Math.sin(angle) * springLength;
vx += (targetX - ball._x) * spring;
vy += (targetY - ball._y) * spring;

vx *= friction;
vy *= friction;
ball._x += vx;
ball._y += vy;

clear();
lineStyle(1, 0, 100);
moveTo(ball._x, ball._y);
lineTo(_xmouse, _ymouse);
};

[cbeech]

the difference in the two is, considering pointA and pointB is that if you subtract pointA values from pointB values you get the angle from the vertex at pointB - whereas if you subtract pointB from pointA you get the angle from the vertex at pointA.

rem: Math.atan2 will return a value in Radians.