Hi,
You make both values absolute and calculate your angle, then
subtract 90 from the degrees.
You have to detect whether adj is negative and if so, add 180 to
your angle or something similar if I remember...
var adjside:Number = watchX - originX;
var oppside:Number = -1*(watchY - originY);
var angle:Number = Math.atan2(Math.abs(oppside), Math.abs(adjside));
// in radians
var angle:Number = Math.round(angle/Math.PI*180) - 90; // convert to
degrees
if(0 > adside) {
angle += 180;
}
var angle:Number = -1*(angle); // invert
Allandt Bik-Elliott (Receptacle) wrote:
hi guys
i have a problem that i need to sort out - i have a script that checks
to see where the mouse pointer is in relation to a point of origin and
then selects which frame from a group of 9 to show
the problem i'm having is that if the angle is above 180 degrees, it
swaps to negative numbers back down to 0 (go to
http://www.19.5degs.com/element/215.php to see an example - in
particular watch the text frame as you move) and i need to figure out
how to make it a full 360
i've tried
if (angle<<0) {
angle = (-1*angle)+180;
}
but that's not right
here is my code
//image frame selector
function changeFrame(clip:MovieClip, angle:Number):Void {
// frame is receiving a wrong number above 180 degrees here
// there are 9 frames so i want each frame to have 40 degrees
(hence angle/40)
var frame:Number = Math.round(angle/40);
// visibleClip is a variable set on all clips (set in the
mousemove below) to tell my script which clip is visible to make it
invisible without having to loop through the other clips when there's
a change
clip[clip.visibleClip]._visible = false;
clip["p"+frame]._visible = true;
clip.visibleClip = ["p"+frame];
}
//mouse follower
var mouseListener:Object = new Object();
mouseListener.lookAt = function(clip:MovieClip, originX:Number,
originY:Number, watchX:Number, watchY:Number):Void {
var adjside:Number = watchX - originX;
var oppside:Number = -1*(watchY - originY);
var angle:Number = Math.atan2(oppside, adjside); // in radians
var angle:Number = Math.round(angle/Math.PI*180); // convert to
degrees
var angle:Number = -1*(angle); // invert
changeFrame(clip, angle);
}
mouseListener.onMouseMove = function () {
var watchX:Number = _xmouse;
var watchY:Number = _ymouse;
// there are 8 images that are trying to do this
for (var i:Number=1; i<9; i++) {
var thisPerson:MovieClip = content_mc["person"+i];
this.lookAt(thisPerson, thisPerson._x, thisPerson._y,
_root._xmouse, _root._ymouse);
}
};
Mouse.addListener(mouseListener);
hope you can help
alz
Allandt Bik-Elliott
Receptacle
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