New HitTest method of Actionscript 3.0

[Flep]

The good old hitTest " method has been removed, or better, it"s been split into 2 separate methods called hitTestObject and hitTestPoint.
The use of these methods isn"t much different from the old hitTest.
Let"s see how they work"
The Document Class I"ve created is this:

package
{
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	
	public class ProvaNuovoHitTest extends MovieClip
	{
		public function ProvaNuovoHitTest()
		{
			primoCaso();
			secondoCaso();
		}
		
		private function primoCaso():void
		{
			black_mc.addEventListener(Event.ENTER_FRAME,controllaMouse);
		}
		
		private function controllaMouse(e:Event):void
		{
			if(black_mc.hitTestPoint(mouseX,mouseY,true))
				debug_0_txt.text='si';
			else
				debug_0_txt.text='no';
		}
		
		private function secondoCaso():void
		{
			circle_1_mc.buttonMode=true;
			circle_1_mc.addEventListener(MouseEvent.MOUSE_DOWN,sposta);
			circle_1_mc.addEventListener(MouseEvent.MOUSE_UP,ferma);
		}
		
		private function sposta(m:MouseEvent):void
		{
			circle_1_mc.startDrag(true);
			circle_1_mc.addEventListener(Event.ENTER_FRAME,controllaContatto);
		}
		
		private function controllaContatto(e:Event):void
		{
			if(circle_1_mc.hitTestObject(circle_0_mc))
				debug_1_txt.text='si';
			else
				debug_1_txt.text='no';
		}
		
		private function ferma(m:MouseEvent):void
		{
			circle_1_mc.stopDrag();
			circle_1_mc.removeEventListener(Event.ENTER_FRAME,controllaContatto);
		}
	}
}

Here is the result:

Let"s analyze the code:

In the primoCaso ( method ) the script checks if the clip hits the mouse with the event ENTER_FRAME.
In this case I use the method hitTestPoint with its 3 parameters:
-x of the point
-y of the point
-forma: it"s a Boolean value ( true/false ) with which you can decide if you want to apply hitTestPoint only to the real shape of the object or to the containing frame.
I suggest you try to change that value to better understand the difference J

In the secondoCaso ( method ) I control if the red MovieClip ( moveable ) hits the blue one using the hitTestObject method with its only parameter ( the actual object with which we"re checking the collision ).
With the hitTestObject method, you can"t choose to apply it to the containing frame. In order to do so, advanced trigonometry algorithms and complicated Actionscript is required ( we"ll see it later ).

Later !

[esviridc]

hey!
i'm a new member, sorta a beginner at all of this. I was able to get the other dragging tutorials to work, but I am not sure as to how to actually transfer this code into my actions. the "private function" and the italian is throwing me off... please help.

by the way: this is an amazing website! much more helpful than anything i have come across as of yet. thank you for doing this for people!

[Flep]

Hi and welcome

Do you mean transfer the code into timeline ?

[anujsharma181]

Hi
I am trying to drag and drop multiple instances of UILoader on stage. My goal is if user puts UILoader partially on top of other UILoader , it should just stay on top of it. If user puts on top of UILoader more than the central point of other UILoader, the other UILoader will change the color of its border and on mouse release gets replaced by the placed UILoader.
I am successful in getting all this but I am getting inconsistent results as an output. Sometimes I have to put exactly on top of other UILoader to replace it and sometimes I just touch the UILoader and it shows red border and gets replaced. I used the logic of calculating the center of rectangle(my UILoader container) and use hitPoint method, and as soon as dragged UILoader hits the calculated center of UILoader, it gets replaced.
Please help me out in where I am messing things up.Any better idea than this will also be highly appreciated.
( Following is the function which is telling my UILoader to replace of stopDrag.)
Thanks a lot
Anuj
/

*************************CODE***************/
function dropUILoader(e:MouseEvent):void
        {
           
            if(e.target    is UILoader)
            {
                var myUILoader:UILoader = e.target as UILoader;

            if (mouseY<746)
            {
                myUILoader.stopDrag();
                //Putting video on top of already existed videos
                var trackChild:Number=container.getChildIndex(myUILoad  er);
                var childContainer:DisplayObject= container.getChildAt(trackChild);
                for (var z:Number=0; z<=container.numChildren-1; z++)
                {
                    var restChild:DisplayObject=container.getChildAt(z);
                   
                    if (childContainer!=restChild)
                    {
                        if(restChild is UILoader)
                        {
                            var cRC:UILoader=restChild as UILoader;                               
                            var regcRCx:Number=cRC.x;
                            var regcRCy:Number=cRC.y;
                           
                            var regcRCWidth:Number=cRC.width;
                            var regcRCHeight:Number=cRC.height;
                                               
if(childContainer.hitTestPoint(((regcRCx+regcRCWid th)/2),(regcRCy+regcRCHeight)/2)==true) 
                            {
                                trace("Totally Hit");   
                                container.removeChild(cRC);
                            }   
                            else
                            {
                                trace("Partially Hit");   
                            }
                        }
                    }
                }
            }               
            else
            {
                myUILoader.unload();
                container.removeChild(myUILoader);
            }
            }
        }