getPixel [help]

[Fuzzgtp]

hey, I need to get some color info for where a user clicks on the screen.
can i use getPixel with an imported image file ? or does it need to be converted to a bitmap? Can someone give me some info on what/how im supposed do that ?

here is the code im using to import my image

function loaderComplete(myEvent:Event)
{
  var myQueryStrings=this.loaderInfo.parameters;
  //Live URL
  loader.load(new URLRequest(myQueryStrings.ImageFile));

}

this.loaderInfo.addEventListener(Event.COMPLETE,loaderComplete);

var loader:Loader = new Loader();
addChild(loader); 

[5TonsOfFlax]

You'll need to draw your loader (or loader's content) into a bitmapdata, then use that bitmapdata's getPixel method.

[Fuzzgtp]

You'll need to draw your loader (or loader's content) into a bitmapdata, then use that bitmapdata's getPixel method.

kinda what i thought, but no idea what im doing right/wrong here. I tried calling on pixeldat2.getPixel and it errors out.

TypeError: Error #1009: Cannot access a property or method of a null object reference. at js_interface_fla::MainTimeline/mouseClickListener()

If i try calling on pixeldat.getPixel it comes up with the same number each time : PIXEL DATA: 16777215

function loaderComplete(myEvent:Event)
{
  var myQueryStrings=this.loaderInfo.parameters;
  //TEST URL
  pixeldat2 = BitmapData(loader.load(new URLRequest("http://www.fuzzthed.com/applications/uploads/adomsshot.jpg")));
  
}
import flash.display.BitmapData;
this.loaderInfo.addEventListener(Event.COMPLETE,loaderComplete);

var loader:Loader = new Loader();
addChild(loader);
stop()

var stopping_point = 0;
var old_x = 0;
var old_y = 0;
var pixeldata = 0;
var pixeldat:BitmapData = new BitmapData(621,466);
var pixeldat2;
											  
addEventListener(MouseEvent.CLICK, mouseClickListener);

function mouseClickListener(event:MouseEvent):void
{   
    stopping_point = stopping_point +5;
	old_x = stage.mouseX;
	old_y = stage.mouseY;
	trace("PIXEL DATA: " + pixeldat.getPixel(stage.mouseX, stage.mouseY))
    
	gotoAndStop(stopping_point)
	  
}

[5TonsOfFlax]

The way you're trying to instantiate pixeldat2 makes absolutely no sense, and shouldn't even compile. You also never actually call load to trigger loaderComplete.

import flash.display.BitmapData;

var stopping_point:int = 0;
var old_x:Number = 0;
var old_y:Number = 0;
var pixeldata:uint = 0;
var pixeldat2:BitmapData;

function loaderComplete(myEvent:Event)
{
  pixeldat2 = new BitmapData(loader.width, loader.height);
  pixeldat2.draw(loader);
  addEventListener(MouseEvent.CLICK, mouseClickListener);
}

var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loaderComplete);
addChild(loader);
loader.load(new URLRequest("http://www.fuzzthed.com/applications/uploads/adomsshot.jpg"))
stop();
											  
function mouseClickListener(event:MouseEvent):void
{   
    stopping_point = stopping_point +5;
    old_x = stage.mouseX;
    old_y = stage.mouseY;
    trace("PIXEL DATA: " + pixeldat2.getPixel(stage.mouseX, stage.mouseY))
    gotoAndStop(stopping_point)
}

[Schfifty Five]

The BitmapData constructor can't take a Display Object (i.e. a Loader) as an argument:

BitmapData(width:int, height:int, transparent:Boolean = true, fillColor:uint = 0xFFFFFFFF)

Even if it did, you still have to use the "new" keyword to create the BitmapData object anyway.

Instead, you have to draw the Loader to your BitmapData, and then use getPixel().

Also, I think you'll want to use contentLoaderInfo rather than loaderInfo, since loaderInfo is more generic and is a property of all DisplayObjects, not just Loaders (I don't think you'll get the right events if you use loaderInfo).

Anyway, try this, it works when I do it:

import flash.display.BitmapData;
stop();

function loaderComplete(myEvent:Event) {
    var myQueryStrings=this.loaderInfo.parameters;
    pixeldat2.draw(loader);
}

var loader:Loader = new Loader();
addChild(loader);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loaderComplete);
loader.load(new URLRequest("http://www.fuzzthed.com/applications/uploads/adomsshot.jpg"));

var stopping_point:Number = 0;
var old_x:Number = 0;
var old_y:Number = 0;
var pixeldata:int = 0;
var pixeldat:BitmapData = new BitmapData(621,466);
var pixeldat2:BitmapData = new BitmapData(621,466);

stage.addEventListener(MouseEvent.CLICK, mouseClickListener);

function mouseClickListener(event:MouseEvent):void {
    stopping_point = stopping_point +5;
    old_x = stage.mouseX;
    old_y = stage.mouseY;
    trace("PIXEL DATA: 0x" + pixeldat2.getPixel(stage.mouseX, stage.mouseY).toString(16));
    gotoAndStop(stopping_point);
} 

Edit: I guess 5tons beat me to it; it probably makes more sense to do "pixeldat2 = new BitmapData(loader.width, loader.height);" like that anyway.

[zompo]

I'm to slow, 5TonsOfFlax works, this is something simular

		var loader:Loader = new Loader();
		loader.contentLoaderInfo.addEventListener(Event.COMPLETE, complete);
		loader.load(new URLRequest("http://www.fuzzthed.com/applications/uploads/adomsshot.jpg"));
		
		function complete($e:Event):void
		{
			var loadedBitmap:Bitmap = $e.target.content as Bitmap;
			this.addChild(loadedBitmap);
			trace(loadedBitmap.bitmapData.getPixel(100,150));
			trace(loadedBitmap.bitmapData.getPixel(100,161));
			trace(loadedBitmap.bitmapData.getPixel(100,172));
		}

that traces

1644563
1644815
1710608

Edit: oh.. Schfifty Five also beat me to it :P

[Fuzzgtp]

thanks a bunch guys. Been a couple years since I touched flash for anything, and as3 is really wierd ><