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Modifying blitMask target?

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First of all, thank you very much for this brilliant job!

I use blitmask as Carl Schooff’s singleDigit.fla example, but I’m using the button to go forward number by number and another button to choose the number user wants. When user choose a number i need to 'disable' this number coloring it in grey for exemple, or modifying its alpha level.

var blitMask1:BlitMask = new BlitMask( strip1, strip1.x, strip1.y, strip1.width, 300, true, true, 0xffff00, true);

//if user choose the number three...
strip1.three.alpha= 0.5; // I want to do that but it doesn't work and I don’t know how to modify or update the target bitmap.

Thank you very much for you help!
Sorry for my poor English..

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Hi and welcome to the GreenSock forums,


Yes, once you modify the target of the BlitMask (like changing the alpha of one of its children) you need to update the BlitMask and recapture the pixels of the target.


The update() method does this.




In your case you will need to set the forceRecaptureBitmap parameter to true like so:

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