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How to blend Keyframes? (i don't mean normal interpolation)

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selva malakia
How to blend Keyframes? (i don't mean normal interpolation)
on Mar 13, 2017 at 6:32:52 am

I'm looking for a plugin/expression that can blend a set of keyframes.

For instance:
1. I've an animated walk cycle of a character.
2. And an animated run cycle of the same character.

How to blend 1 and 2 so the character can walk and gradually run. Is there any sophisticated workflow out there?


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Cassius Marques
Re: How to blend Keyframes? (i don't mean normal interpolation)
on Mar 13, 2017 at 8:05:41 pm

You can add to any property a linear expression essentially transitioning between two values (lets say add the expression to the foot target of the run cycle and use the foot target of the walk cycle as a argument) . But that won't solve your problem. A walk cycle and a run cycle have both very distinct behaviours. A run cycle has a pose in which no feet touches the ground. Transitioning from a walk cycle would mean that the character would slightly hover over the ground when on those moments.

In my opinion you can't automate that and make it look fine.

Cassius Marques
http://www.zapfilmes.com


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Dave LaRonde
Re: How to blend Keyframes? (i don't mean normal interpolation)
on Mar 14, 2017 at 3:03:14 pm
Last Edited By Dave LaRonde on Mar 14, 2017 at 3:25:45 pm

I agree with Cassius. What you want to do won't work.

Walking is a motion where at least one foot is on the ground.
Running is a motion where ZERO feet are on the ground, after each stride.

They may both be forms of locomotion, but you can't automate a walk into a run. I recommend shooting a person on a treadmill as the speed increases to examine the transition from a walk to a run. Or go take a walk and change from a walk to a run as you would like it to happen. Notice the changes in the speed and the length of your strides and how more power is transferred to the feet in particular.

You need the SKILL of animation. You can't use the PROCESS of automation.

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


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