easy ease in rotation

[Darby Edelen]

I think you should look at your speed graph to tweak the interpolation.

[Darby Edelen]

[skimber] “Unfortunately, when I do that, it makes the tires rotate the other way halfway through the animation.”

How many keyframes and what type are you using?

[Sean Kimber]

There were two keyframes. One with rotation of 0x0.0. The next one had an easy-ease in at about 50×0.0. I tried the “hold keyframes” option, but that didn’t look right. (By the way, I’m very familiar with hold keyframes.) I was just trying to get the wheels to look like they were decelerating without reversing their spin.

Thanks for your help.

-Sean

[Sam Moulton]

Start with 2 keyframes only with no easy ease applied.

Go to the graph editor and select show reference graph and edit value graph. You’ll see the speed graph. Select the end keyframe and then click on the ease in button at the bottom of the graph.

Now grab the handle created and while holding down the shift key drag it to the right until the speed curve looks like you’d like it to look. You won’t get a perfectly linear speed until the deceleration starts but it will be close. If you must make it linear add another keyframe at about the point where you want the deceleration to start and carefully adjust the handles while keeping an eye on the speed graph.

If your wheel still appears to turn backwards then you’ve got the same effect that causes stage coach wheels and helicopter blades to appear to turn backwards. It’s called a stroboscopic effect and can only be fixed with motion blur or by changing the speed of the rotation.

[Sam Moulton]

woops,,, make that edit the speed graph not the value graph. You want to make sure that neither graph has a bit of a hook on it.

[Sean Kimber]

Thanks! I’ll give it a try.