AIR Android fullscreen masked background -- plz help

[pa-pavel]

Hi,

I got the follow basic code making my backgound reszie to the stage dimentions:

public function main()      {
     stage.scaleMode = StageScaleMode.NO_SCALE;
     stage.align = StageAlign.TOP_LEFT;
     sw = stage.stageWidth
     sh = stage.stageHeight
     setPosition();
     stage.addEventListener(Event.RESIZE, resizeLayout);
}
private function setPosition():void     {
     bg.width = stage.stageWidth;
     bg.height = stage.stageHeight;
     bg.x = 0
     bg.y = 0
}
private function resizeLayout(e:Event):void     {
     setPosition();
}

The problem is if the bg movieclip is a has a mask inside of it, the dimentions are not of the masked area but of the total size.

Any ideas how i can get around that will be appriciated.

Thx Pavel

[moccamaximum · Accepted solution]

the factor you have to multiply the dimensions your bg with depends on the stage/mask ratio.

the formula is basically this:

(x*bg.width/bg.width) = stage.width/mask.width;

you need x therefore:

x= stage.width/mask.width;

that changes your function to:

private function setPosition():void     {
     bg.scaleX = stage.width/bg.mask.width;
     bg.scaleY= stage.height/bg.mask.height;
     bg.x = 0
     bg.y = 0


// the regristtration point of your mask should be aligned with the regirstrationpoint of your bg otherwise you have to calculate relative nullpoint

[pa-pavel]

Worked like a charm! Thx!