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Stroke effect/write on

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Steve Waldron
Stroke effect/write on
on Oct 26, 2012 at 12:16:33 pm

Greetings! I am in the early stages of setting up a workflow for what could be a large amount of whiteboard style videos.

I have been able to create a lot of vector path images using illustrator which I have then pulled into AE masks.

I can use stroke to then animate these lines 'drawing on' which is great - but for the final stage I want to add a hand and pen following the path.

This is where I'm stumped.

The stroke effect uses the progress of the lines as a percentage so there is no anchor point to parent the pen tip to. I can manually trace the path using write on, motion trace or similar but I could potentially have dozens of videos in a series each holding a large amount of images. So I was sure I'd be able to find a more efficient way but so far no luck.

Any ideas from the collective genius of the cow?

I found a program called VideoScribe that seems to do what I want but found the program quite limited in terms of quality and other options and so wanted to keep things under the after effects roof if possible.

Thansk folks.


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Vishesh Arora
Re: Stroke effect/write on
on Oct 26, 2012 at 5:53:26 pm

Steve

COpy the Mask Path and Paste is into the Position Attribute of your Pen/Hand Image.


Here is a tutorial which may help:

http://allbetsareoff.com/tutorials/animating-a-signature-part-2/

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

Demo Reel(3D):







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Steve Waldron
Re: Stroke effect/write on
on Oct 29, 2012 at 10:35:56 am

This is great, thanks both, although a slight problem that still needs ironing out. It could be an AE question - but also could be illustrator...

I'm bringing in not just one, but many paths, all of them are vector paths copied out of illustrator, when I paste them in it creates about 25 paths - I guess what I need to do is collate these into just one path so the solution you've suggested works.

I'm not hugely experienced within illustrator but cant seem to find a meathod of taking several paths and merging them into one - I shall continue my hunt.

Once I get the 25 paths down to just one, it should work a treat, I'm just seeing if anyone knows way to do this either within AE or IL?

thanks again.


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Dave LaRonde
Re: Stroke effect/write on
on Oct 29, 2012 at 3:59:25 pm

Without actually seeing the paths, it would be difficult to judge. You could encounter unnatural speed of writing with a single path, and it might also might be difficult to pull of a single-path strategy if the paths frequently cross, intersect or cover one another.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Steve Waldron
Re: Stroke effect/write on
on Oct 29, 2012 at 4:02:57 pm

yeah, I've joined the paths in illustrator and experienced some issues with the joinings like you mentioned. It's fixable, but not terribly viable on a long term basis as I'd spend a ton of time in illustrator for each image.

Thanks anyway for the help and advise guys, I'll keep working on it.


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Dave LaRonde
Re: Stroke effect/write on
on Oct 26, 2012 at 7:37:03 pm

...and if you want to be able to modify the speed of the writing, Pick-whip the the pen's position property to the Pen position property of the Write-On effect.

Make sure the pen tip is at the layer's anchor point.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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