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Thread: lining up movieclip with mouse cursor

  1. #1

    lining up movieclip with mouse cursor

    How would you create the effect in this game: http://www.newgrounds.com/portal/view/375622
    where the hero's gun/arms align up with the mouse cursor?

    I'm guessing there is trigonometry involved and tracking _xmouse/_ymouse, but I'm not to sure. Any help is appreciated.

    Here's what I have so far. I think the problem is in my math.
    Any ideas.

    Code:
    onEnterFrame = function ():Void {
        addScope();
        var armY = _ymouse-this.hero_mc.arm_mc._y;
        var armX = _xmouse-this.hero_mc.arm_mc._x;
        var radians = Math.atan2(armY, armX);
        this.hero_mc.arm_mc._rotation = radians*90/Math.PI;
    };
    
    function addScope():Void {
        Mouse.hide();
        scope_mc.onMouseMove = function() {
            this._x = _root._xmouse;
            this._y = _root._ymouse;
            // updateAfterEvent used to refresh stage creating smooth cursor movement
            updateAfterEvent();
        };
    }

  2. #2
    I didn't really look your code over too well but it looks like you have the right idea. I remember after about an hour of playing around I created this lump of code to get a movieclip to point at the mouse. Hope it helps.


    Code:
    xTanDist = _xmouse - Arrow._x;
    yTanDist = _ymouse - Arrow._y;
    
    Radians = Math.atan2(yTanDist, xTanDist)*10
    	
    Rotation = Math.round(5.8*Radians)
    Arrow._rotation = Rotation+90
    Attached Files Attached Files


  3. #3
    207
    posts
    Registered User
    The first thing to jump out at me is you're using *90/Math.PI; where I usually would have *180/Math.PI;

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