actionscript 3 - How to create masks in AS3?

Question

objectToBeMasked.mask = maskObject;

Ok, simple... but I can SEE the maskObject unless I set its alpha to 0 and then it doesn't let clicks through to objectToBeMasked

And every single tutorial that I've seen fails to mention this and how to solve it, as if it should be obvious.

How do I mask objects through AS3 so that the masks act like masks act like the ones added in the IDE?

Answer 1

Here is an example :

var maskedShape : Shape = new Shape();
maskedShape.graphics.beginFill(0x0);
maskedShape.graphics.drawRect(0, 0, 100, 100);
maskedShape.graphics.endFill();
addChild(maskedShape);

var maskerShape : Shape = new Shape();
maskerShape.graphics.beginFill(0x0);
maskerShape.graphics.drawRect(0, 0, 100, 100);
maskerShape.graphics.endFill();
addChild(maskerShape);
maskerShape.x = 20;
maskerShape.y = 20;

maskedShape.mask = maskerShape;