circular movement towards mouse

[pi3rc3]

i was looking at the circular movement tutorial on this site and am now trying to make it so the object points towards the mouse but only moves around that circular axis. any ideas on how i can do this in as3?

[nathan99]

I don't get it :/

[CriTiCeRz]

nathan I think he means that he wants an mc to follow the mouse making circles.. lol

[pi3rc3]

i made alittle diagram to explain..
http://www.wormp.com/pictures/circular.GIF

where the bluish line is the path i want the movie clip (red circle) to move along. but as you see it adjust its position based on the mouses location relative to the center of the path.

hope that clears up any confusion

[nathan99]

ah, like this;


var radius:Number = 50;
//The radius of the circle
var centerX:Number = 200;
//The center X position of the circle
var centerY:Number = 200;
//The center Y position of the circle
MovieClip.prototype.startCycle = function():Void {
this.onEnterFrame = function():Void {
this.ang = Math.atan2(this._y-_ymouse, this._x-_xmouse);
//Rotate depending on mouse location
this._x = centerX+(Math.cos(this.ang)*radius);
//Move along the X
this._y = centerY+(Math.sin(this.ang)*radius);
//Move along the Y
};
};
im0.startCycle();


?

[nathan99]

^^ im0 is the instance name of the red circle

[pi3rc3]

exactly, thanks.

[pi3rc3]

now im trying to get the same effect but so the circle points towards the mouse and not away. ive tried to change the calculations with no success. anyone know how this could be accomplished?

[jjcorreia]

.prototypes...yuck :P

[nathan99]

var radius:Number = 50;
//The radius of the circle
var centerX:Number = 200;
//The center X position of the circle
var centerY:Number = 200;
//The center Y position of the circle
MovieClip.prototype.startCycle = function(toMouse:Boolean):Void {
this.onEnterFrame = function():Void {
this.ang = Math.atan2(centerY-_ymouse, centerX-_xmouse);
//Rotate depending on mouse location
this._x = centerX+(Math.cos(this.ang)*radius)*(toMouse ? 1 : -1);
//Move along the X
this._y = centerY+(Math.sin(this.ang)*radius)*(toMouse ? 1 : -1);
//Move along the Y
};
};
circle1.startCycle(true); // true moves to mouse
circle2.startCycle(false); // false moves away from mouse

Fixed the formula ;)