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Adding bounce/elasticity to tracked null object

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Lance Gambis
Adding bounce/elasticity to tracked null object
on Oct 8, 2013 at 6:11:25 pm

I have an object (graphic) this is tracking another object using motion tracking. How do I insert some elasticity/bounce/delay between the graphic and the object it is tracking. Not sure if I'm explaining myself correctly. More specifically, I have someone walking and being followed by a dark cloud. But I want to inject a natural/organic movement into how the cloud moves over the person.

Perhaps I'm not using the right search terms but I could not find
anything.

Thanks for any help or for pointing out any tuts that might put me on the right path.


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Roland R. Kahlenberg
Re: Adding bounce/elasticity to tracked null object
on Oct 8, 2013 at 9:15:02 pm

Add the Point Expression Control to the tracked layer. Then add the following Expression to its Position property -

value+effect("Point Control")("Point")


You should now be able to manually add keyframes to Point Control, to offset the original tracking data.

HTH
RoRK

Intensive mocha & AE Training in Singapore and Other Dangerous Locations

Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE/ACI


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Dave LaRonde
Re: Adding bounce/elasticity to tracked null object
on Oct 8, 2013 at 10:36:30 pm

[Lance Gambis] "I have someone walking and being followed by a dark cloud. But I want to inject a natural/organic movement into how the cloud moves over the person."

If that's the case, there isn't a lot of need to do do a track. I'd say just animate the position, and let your judgement be your guide.

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


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Lance Gambis
Re: Adding bounce/elasticity to tracked null object
on Oct 9, 2013 at 12:16:15 am

Thanks for your tips--will put them into action!


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Roland R. Kahlenberg
Re: Adding bounce/elasticity to tracked null object
on Oct 9, 2013 at 12:21:06 am

Instead of the method I specified in the earlier post, you could also offset the tracked position by keyframing the Anchor Point.

HTH
RoRK

Intensive mocha & AE Training in Singapore and Other Dangerous Locations

Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE/ACI


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Tudor "Ted" Jelescu
Re: Adding bounce/elasticity to tracked null object
on Oct 9, 2013 at 8:31:59 am

For realistic interactions you can test Newton- it can provide you with the natural feel you're after.

Tudor "Ted" Jelescu
Senior VFX Artist


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