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    <p>Actually, the answer depends on which platform you are targeting. In <strong>FlashPlayer</strong>, <strong>hitTestObject</strong> just checks if the bounding boxes of the objects overlap, so as long as you have the correct x and y positions and the correct width and height for your objects you don't need them to actually be on the stage. </p> <p>However, in <strong>AIR</strong>, probably some kind of code optimization is taking place, and if one of the objects is not actually on the stage it will return false</p> <p>Let's just tinker a little with the example from the docs, removing just one addChild: </p> <pre><code>import flash.display.Shape; var circle1:Shape = new Shape(); circle1.graphics.beginFill(0x0000FF); circle1.graphics.drawCircle(40, 40, 40); //addChild(circle1); var circle2:Shape = new Shape(); circle2.graphics.beginFill(0x00FF00); circle2.graphics.drawCircle(40, 40, 40); circle2.x = 50; addChild(circle2); var circle3:Shape = new Shape(); circle3.graphics.beginFill(0xFF0000); circle3.graphics.drawCircle(40, 40, 40); circle3.x = 100; circle3.y = 67; addChild(circle3); trace(circle1.hitTestObject(circle2)); trace(circle1.hitTestObject(circle3)); trace(circle2.hitTestObject(circle3)); </code></pre> <p>In FP10 we get the following output:</p> <pre><code>true false true </code></pre> <p>However, in AIR we get:</p> <pre><code>false false true </code></pre> <p>The key difference is that hitTestObject between the circle1 and circle2 is false in AIR because circle1 has not been added to the stage, but in FlashPlayer is true anyways. Thanks to @user1113426 for pointing there was something amiss here!</p>
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    1. COThx @danii, I'm so tired I didn't think about testing that code without the addChild, sorry :) Yep, the problem it's not there...... Argh
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    2. CO@danii If remove comments from `addChild(circle2)` results will be `false,false,false`. So hitTest counts `addChild`.
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    3. CO@user1113426 wow you are right, if I compile targeting AIR I get different results... it seems AIR behaves a little different than FlashPlayer in what refers to hitTestObject, so the problem might after all be there... I'll edit my answer for future reference!
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