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Convert 2D scale to 3D position

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anders bundgaard
Convert 2D scale to 3D position
on Jul 8, 2014 at 1:46:30 pm

hello all,

i've got a comp where a 2d text layer moves towards camera using scale keyframes… is there a way to convert the scale keyframes to 3d z position keyframes?

thanks in advance
anders


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Dave LaRonde
Re: Convert 2D scale to 3D position
on Jul 8, 2014 at 2:22:54 pm

This depends on what you want to do. I'll assume there's a reason why you can't animate the scale property of the text layer if you make it 3D.
If the text layer grows from nothing, you'll need a combination of scale and position animation. Likewise, if it shrinks to nothing, you'll have to do the same thing.

A description of what you want to accomplish would be helpful.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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anders bundgaard
Re: Convert 2D scale to 3D position
on Jul 8, 2014 at 2:26:35 pm

i've got a few comps doing different things.

comp 1. scales from 1000% to 100%.
comp 2. scales from 100% to 0%.

does that help?

anders


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Dave LaRonde
Re: Convert 2D scale to 3D position
on Jul 8, 2014 at 2:34:20 pm

A little. For the one that scales from 100 to 0, I recommend the combination position-scale trick mentioned earlier.

For the comp that goes from 1000 to 100, I don't know of any straightforward method to automatically translate 2D scale into 3D position. For example, you'd have to compensate for the focal length of the camera, which can vary.

At the moment, I can only say, "use your discerning eye".

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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anders bundgaard
Re: Convert 2D scale to 3D position
on Jul 8, 2014 at 2:54:04 pm

had a feeling there wouldn't be a short cut. i've only got about 150 layers to match… i had hoped there might be a plugin / script that could handle it.

thank
anders


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John Cuevas
Re: Convert 2D scale to 3D position
on Jul 10, 2014 at 11:46:06 am

You might try in the expressions forum. I could write you up a ease expression that could take could take info from scale and apply it to your z position, but if you truly want to convert scale to position it's going to take a little more math than I know.

Johnny Cuevas, Editor
Thinkck.com

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.


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