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Easy Ease In results in a “kink” in my animation curve
I’m doing a very simple position animation on a layer. It is only moving in the X direction (from left to right). I converted the last keyframe using “Easy Ease In” to slow the motion down and make the layer come to a smooth stop, but when doing a RAM preview, I noticed the layer would go too far to the right and then come back to the left. Not a smooth left to right stop at all. I opened the curve editor and see what I would describe as a “kink” in the curve just before that final keyframe that would explain the jerk at the end. What’s up with that? Is there a way to solve this problem? I’ve tried to grab bezier handles, turned it back into a linear keyframe, tried Easy Ease again, but I’m stumped for the moment. Anyone see anything like this before? Any help would be greatly appreciated.
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6 Replies
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there’s two ways to resolve this…
1.highlight the two keyframes…
right click and select keyframe interpolation…
change the spatial interpolation setting from auto-bezier to linear.2. under your preferences..go to the general settings and check mark the fourth box..
this defaults the spatial interpolation to linear…(so you dont have to do #1 all the time) -
Well, I haven’t seen it before, but try to select all the keyframes, but the first and the last ones, right-click them and seletc “Rove acroos time”.
I’m not sure if it will solve the problem, but it’s worth trying.
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that kink is created by spatial interpolation.
he’s converting a linear motion into easy ease…which is bezier-based, space over time becomes curvy..hence the boomerang-like movement.
defaulting the spatial interpolation to linear removes that boomerang problem and keeps your easy ease moves strictly on speed. -
Converting the last keyframe to have a Spatial Interpolation of “Linear” did the trick. Thank you.
I would like to be able to understand this concept more fully. It’s one of those deals where I feel like I kind of “get it,” but I wouldn’t be able to articulate it, I don’t think. Wondering what was unusual about this circumstance where I ran into a problem. I’ve been using AE for over 10 years, and I can’t say I’ve ever run into this problem before. I did go in and mess with keyframe interpolation settings at one point in an effort to fix this, but I don’t think I did before I noticed the “boomerang” action. Anyone care to explain why I WOULD NOT want to change the default setting for Spatial Interpolation as suggested by djeddy76?
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It’s just personal preference. If you have it set to spatial, then your keyframe paths will be curved by default, other wise they will be straight lines.
To see it really easily, take a small image, and place it along the bottom left of your composition and set a keyframe. Then move it to the top middle and set a keyframe, and finally the bottom right side, and set a third keyframe. You see the dotted path that your image will follow? It will either be curved or straight, depending on how the interpolation is set.
Usually, you want to have a smooth, more “natural” motion, and so you wouldnt want it set to linear.
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[terrycoolidge] “I would like to be able to understand this concept more fully. It’s one of those deals where I feel like I kind of “get it,” but I wouldn’t be able to articulate it, I don’t think. Wondering what was unusual about this circumstance where I ran into a problem. I’ve been using AE for over 10 years, and I can’t say I’ve ever run into this problem before. I did go in and mess with keyframe interpolation settings at one point in an effort to fix this, but I don’t think I did before I noticed the “boomerang” action. Anyone care to explain why I WOULD NOT want to change the default setting for Spatial Interpolation as suggested by djeddy76?”
Just remember that AE lets you control keyframes in both time (temporal) and space. When you adjust temporal keyframes you’re controlling how fast or slow the change is- not the positioning. A good exercise to help you master both types of keyframes is to try to animate a bouncing ball as it moves across the screen. To do it well, you’ll have to adjust both temporal and spatial keyframes.
– Jim
Jim Krause
tabletop productions https://www.ttop.com
(812) 332-1005
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