Flash/Flex Tidbit #2 How to use Alpha Mask in Flash CS3

October 21, 2007

Flash/Flex Tidbit #2 How to use Alpha Mask in Flash CS3

Category: actionscript, as3, flash, flash CS3 — joshspoon @ 9:37 pm —

So the other day I spent 2hrs looking for how to and trying to do an alpha mask (I've done on once). So like an idiot I was trying to do it the Photoshop way with level of gray.

My method of thinking

Black = 100 and White = 0
but it doesn't matter what color only the opacity.

If you have never mad a alpha mask in Flash before or CS3 it's easy.

open a fla
draw a shape
Make that shape a MovieClip
name it maskee_mc
draw a second shape
use a linear gradient
choose color
set one linear color alpha at say, 40
Make that second shape another MovieCilp
name it mask_mc

PLAIN TEXT

Actionscript:

this.mask_mc.cacheAsBitmap = true;
this.maskee_mc.cacheAsBitmap = true;
// as2 was maskee_mc.mask(mask_mc);
maskee_mc.mask = mask_mc;

That's it!

Horaayy..there are 5 comment(s) for me so far ;)

hello!

do you think you could provide a sample fla for this? i cant get it working...

ps: as 2 was setMask(), not mask()

cheers,
Z.

pallzoltan wrote on January 7, 2008 - 10:12 am

Yeah give me a sec. I'll throw it up there

joshspoon wrote on January 8, 2008 - 8:56 pm

here is an example:
http://tinyurl.com/233mdo

joshspoon wrote on January 8, 2008 - 9:14 pm

thanks mate

pallzoltan wrote on January 9, 2008 - 6:53 am

Sweet. Can't believe how simple this was, after looking through so many other complicated solutions.
Thanks

marty wrote on February 8, 2008 - 2:56 pm

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October 21, 2007