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From: B Yates on 8 Nov 2005 05:38
Hi guys,

I am trying to create a simple animation using a mask. I want to create
something which looks like an ECG machine. I have created the zig-zag pattern
and made it a mask layer, and placed a coloured rectangle on the layer beneath
it which scrolls left to right very quickly.

The problem is that the mask doesn't work for some reason. My zig-zag line
just disappears completely when i convert it to a mask. The zig-zag line is a
symbol at present, however I also tried it as a series of lines grouped, but
this didn't work either.

Any ideas please?

B.

From: B Yates on 8 Nov 2005 10:02
Update:

I have got the mask working on the stage, the problem was that I was using the
line tool instead of a slim rectangle to create the mask. Spot the beginner.

Although it works nicely on the stage, when i export the movie, or do a test
scene, only the background is displayed.

Here is the setup of the movie:

mask layer - contains the zig-zag pattern for the ECG, and is set to mask
r1 layer - contains a green rectangle which moves from left to right on a
motion tween, is set to masked
background - black

I can't understand why it won't display?

Cheers, B.

From: Chris Ivey on 8 Nov 2005 13:46
Masking won't work properly if you try to use a stroke as your mask. Convert your storkes to fills on the mask layer, and the masked content should show through properly.
From: B Yates on 10 Nov 2005 04:25
Hi Chris,

Yes I have done this - my update post acknowledged this mistake.

The problem now is that it works perfectly on the stage, with the layer setup
as described in update post, but when I Export or Test Scene it displays a
blank canvas.

B.

From: B Yates on 11 Nov 2005 04:12
Managed to get it working.

I hadn't grouped the fills I used to make up the zig-zag pattern, and there
was a small instance of a stroke on the edge of the mask layer which was
causing the error when outputting.

Thanks for your input Chris.

B.

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