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How to add random movie clip from library to stage dynamically?
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Thread: How to add random movie clip from library to stage dynamically?

  1. #1
    Junior Member
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    How to add random movie clip from library to stage dynamically?

    Hi,
    How to add random movie clip to stage from many different movie clips in library?
    If I wanted to add one movie clip to stage I would do liko so:
    Code:
    stage.addEventListener(MouseEvent.MOUSE_MOVE, onMove); 
    function onMove(e:MouseEvent):void {     
    var mc:MovieClip = new Ball();     
    mc.x = mouseX;     
    mc.y = mouseY;     
    addChild(mc); 
    }
    Code above works perfect but I tried following but with no success, no errors, but nothing happens - no mc's are added to stage. I have 6 movie clips in library and they all are linked, exported for actionscript. On MouseOver I want to add random movie clip from those six movie clips to the stage. Am I going in wrong direction? Any thoughts how to achieve this?

    Code:
    var myArray:Array = [mc1, mc2, mc3, mc4, mc5, mc6]; 
    stage.addEventListener(MouseEvent.MOUSE_OVER, onLoop); 
    function onLoop(e:MouseEvent):void {     
    for (var i:int = 0; i< myArray.length; i++) {
             var randomMc:Number = Math.floor(Math.random()*i);
             var mc:MovieClip =  new myArray[randomMc];
             addChild(mc);
             mc.x = mouseX;
             mc.y = mouseY;
         }
     }
    Thanks

  2. #2
    lemon juice hurts your eyes florianvanthuyn's Avatar
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    The loop you use will generate 6 objects on the stage, and you only want to add 1 right?
    Try this:
    PHP Code:
    var theClip:Object;
    stage.addEventListener(MouseEvent.MOUSE_OVERonLoop); 

    function 
    onLoop(e:MouseEvent):void

       var 
    random:uint Math.round(Math.random() * 6);
       var 
    randomClass:Class = Class(getDefinitionByName("mc" random));
       if(
    mainClass// if it exists, so no errors
       
    {
          
    theClip = new randomClass();
          
    addChild(theClip as DisplayObject);
       }
     } 
    EDIT: Oh, and be sure your library items extend to mc1, mc2, mc3, mc4, mc5 and mc6, because it will be looking for those exact names
    Florian Vanthuyne

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  3. #3
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    Hi, your code returned error:
    1120: Access of undefined property mainClass.
    I took away if statement and then got no errors but it didn't work, then I replaced MouseEvent.MOUSE_OVER with MOUSE_MOVE and then your code worked, the only thing I could not figure out how to assign x and y properties of mouse to the movie clips:
    Code:
    var theClip:Object;
    stage.addEventListener(MouseEvent.MOUSE_MOVE, onLoop); 
    
    function onLoop(e:MouseEvent):void
    { 
       var random:uint = Math.round(Math.random() * 6);
       var randomClass:Class = Class(getDefinitionByName("Mc" + random));
             theClip = new randomClass();
          addChild(theClip as DisplayObject);
    }
    Meanwhile I fixed my code and now it works:
    Code:
    var myArray:Array = [Mc,Mc1,Mc2,Mc3,Mc4,Mc5]; 
    stage.addEventListener(MouseEvent.MOUSE_MOVE, onLoop); 
    function onLoop(e:MouseEvent):void {     
             var randomMc:Number = Math.floor(Math.random()*myArray.length);
             var mc:MovieClip =  new myArray[randomMc];
             addChild(mc);
             mc.x = mouseX;
             mc.y = mouseY;
         
     }
    Thank you!

  4. #4
    lemon juice hurts your eyes florianvanthuyn's Avatar
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    Yeah sorry, that should have been if(randomClass)
    So it was probably because of the naming it didn't work, right? Because I see you've capitalized the m's in your Array.
    Florian Vanthuyne

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  5. #5
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    I was testing this approach for my future project. I will create particle effect: on MOUSE_MOVE I want to add random latin alphabet letters (26 alltogether), so now I must figure out the way how to do this without creating by hand 26 movie clips and then link them from library....
    Any thoughts on that?

    Cheers

  6. #6
    lemon juice hurts your eyes florianvanthuyn's Avatar
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    Sure, just type in the alphabet in an Array and use the same method to make an instance of a Textfield, which you then put inside of a MovieClip (can be done in code) or an instance of a MovieClip in your library containing a dynamix textfield
    Florian Vanthuyne

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  7. #7
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    Thanks dude, will try right away

    P.S
    Yeah sorry, that should have been if(randomClass)
    So it was probably because of the naming it didn't work, right? Because I see you've capitalized the m's in your Array.
    I just tried again your code again with if(randomClass) + MOUSE_MOVE instead of MOUSE_OVER and it works, also gave x and y properties to MC's, works perfect!

    Code:
    var theClip:Object;
    stage.addEventListener(MouseEvent.MOUSE_MOVE, onLoop); 
    
    function onLoop(e:MouseEvent):void
    { 
       var random:uint = Math.round(Math.random() * 6);
       var randomClass:Class = Class(getDefinitionByName("Mc" + random));
       if(randomClass) // if it exists, so no errors
       {
          theClip = new randomClass();
          addChild(theClip as DisplayObject);
    	  theClip.x = mouseX;
    	  theClip.y = mouseY;
       }
    }
    thnks again!

  8. #8
    lemon juice hurts your eyes florianvanthuyn's Avatar
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    Also, see if adding e.updateAfterEvent(); at the end of the onLoop() function (just beneath the if()) gives you a more fluid particle effect
    Florian Vanthuyne

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  9. #9
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    This worked perfectly for what I was looking for. Thanks to everyone!

    I have one additional question regarding this method. I am working with creating movie clips on the stage. With every mouse click event, a new movie clip is created in a static position. But, as it is currently coded, a new movie clip is loaded directly on top of the previously loaded movie clip. So, with every click, I keep adding more and more on top of each other.

    Now, I know I should probably use the removeChild(); command, but I'm not sure if I should be removing the array or theClip, as I have never worked with this "addChild as DisplayObject" method before.

    So, what would I remove and where would I put that code?

    My code is essentially exactly the same, but here it is, just so you get a better idea of what's happening:

    Actionscript Code:
    var front:Object;
    stage.addEventListener(MouseEvent.MOUSE_DOWN, onLoop);

    function onLoop(e:MouseEvent):void {
        var random:uint = Math.round(Math.random() * 2) + 1;
        var randomClass:Class = Class(getDefinitionByName("fmc" + random));
        if(randomClass) {
            front = new randomClass();
            addChild(front as DisplayObject);
                front.x = 0;
                front.y = 0;
        }
    }

  10. #10
    Junior Member
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    May 2014
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    Hi all!
    I am new to programming.
    I want to ask?
    How to add 26 movie clip from library to stage when press different key on the keyboard?
    In other way how to place letters-movie clips from library on the stage when press associated key on keyboard?


    Thank you

  11. #11
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    You are a king!!!

    Thank you for introducing the "Class" type and the use of "getDefinitionByName".
    I was looking for this solution and it's was not easy to find!

    Quote Originally Posted by florianvanthuyn View Post
    The loop you use will generate 6 objects on the stage, and you only want to add 1 right?
    Try this:
    PHP Code:
    var theClip:Object;
    stage.addEventListener(MouseEvent.MOUSE_OVERonLoop); 

    function 
    onLoop(e:MouseEvent):void

       var 
    random:uint Math.round(Math.random() * 6);
       var 
    randomClass:Class = Class(getDefinitionByName("mc" random));
       if(
    mainClass// if it exists, so no errors
       
    {
          
    theClip = new randomClass();
          
    addChild(theClip as DisplayObject);
       }
     } 
    EDIT: Oh, and be sure your library items extend to mc1, mc2, mc3, mc4, mc5 and mc6, because it will be looking for those exact names
    Last edited by avicbk; 06-20-2015 at 11:57 PM. Reason: accidentally posted with SHIFT+ENTER before finish writing...

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