DisplayObject - GetBounds

Code

var stage = new Stage("canvas", 420, 500, 30);

var parent_box = new Sprite();
parent_box.x = 100;
parent_box.y = 100;
parent_box.graphics.beginFill(0x0000FF);
parent_box.graphics.drawRect(0, 0, 100, 100);
parent_box.graphics.endFill();
stage.addChild(parent_box);

var target_box = new Sprite();
target_box.x = -50;
target_box.y = 50;
target_box.graphics.beginFill(0x000000);
target_box.graphics.drawRect(0, 0, 100, 100);
target_box.graphics.endFill();
parent_box.addChild(target_box);

var child_box = new Sprite();
child_box.x = 0;
child_box.y = -100;
child_box.graphics.beginFill(0xFF0000);
child_box.graphics.drawRect(0, 0, 50, 50);
child_box.graphics.endFill();
target_box.addChild(child_box);

var transform_box = new Sprite();
transform_box.x = 300;
transform_box.y = 200;
transform_box.rotation = 90;
transform_box.scaleX = 2;
transform_box.scaleY = 1.5;
transform_box.graphics.beginFill(0x00FF00);
transform_box.graphics.drawRect(0, 0, 100, 100);
transform_box.graphics.endFill();
stage.addChild(transform_box);

var transform_child_box = new Sprite();
transform_child_box.x = 20;
transform_child_box.y = -50;
transform_child_box.graphics.beginFill(0xFF00FF);
transform_child_box.graphics.drawRect(0, 0, 50, 50);
transform_child_box.graphics.endFill();
transform_box.addChild(transform_child_box);

var notadded_box = new Sprite();
notadded_box.x = 500;
notadded_box.y = 500;
notadded_box.graphics.beginFill(0xFFFF00);
notadded_box.graphics.drawRect(0, 0, 100, 100);
notadded_box.graphics.endFill();

//transform_box and transform_child_box results are a little different but it's good enough for me
//I think the reason is how we are calculating the Matrix.invert()
trace("target");
trace("result");
trace("answer");
trace("---------------------");
trace("stage");
trace(target_box.getBounds(this.stage));
trace(new Rectangle(50, 50, 100, 200));
trace("---------------------");
trace("parent_box");
trace(target_box.getBounds(parent_box));
trace(new Rectangle(-50, -50, 100, 200));
trace("---------------------");
trace("self");
trace(target_box.getBounds(target_box));
trace(new Rectangle(0, -100, 100, 200));
trace("---------------------");
trace("child_box");
trace(target_box.getBounds(child_box));
trace(new Rectangle(0, 0, 100, 200));
trace("---------------------");
trace("transform_box");
trace(target_box.getBounds(transform_box));
trace(new Rectangle(-75, 100, 100, 66.65));
trace("---------------------");
trace("transform_child_box");
trace(target_box.getBounds(transform_child_box));
trace(new Rectangle(-95, 150, 100, 66.65));
trace("---------------------");
trace("notadded_box");
trace(target_box.getBounds(notadded_box));
trace(new Rectangle(-450, -450, 100, 200));
trace("---------------------");

Canvas

Output