From 2's to 1's

I've been thinking about this for a while, and it kinda works out that I can post this now cuz I've been teaching this in my class at CalArts. There is a real danger in SOLELY thinking on 2's. Meaning, you assume that if you need to add ones inbetween those drawings all you do is simply add them in evenly spaced. Not so much-- It's a super important tool to understand the difference in spacing on ones and two's and it can be kind tricky. but the important thing here is to understand WHY you space things a certain way, not memorize charts for whenever the occasition pops up.
I thought a very clear way to present this idea would be through a little ball bounce experiment for ya'll to prove my points. I've animated 4 different ball bounces, all different spacing. 1: all 2's, 2: lazy inbetweens, 3: adjusted spacing, 4: fine tuning of spacing. The first test is completely on two's--


Ball Bounce on 2's - video powered by Metacafe

As you can see it works "OK", but it's not great-- what would give it a lot more fluidity and weight, you decide, would be to put it on to 1's. And I would agree with you, plus it's strobing! So, you just think, whelp, just throw in there 1 drawing between every other drawing and we just be set! Yeah, ummmm, THEN your results come back and you get this:


Ball Bounce - video powered by Metacafe

It's not terrible, but it doesn't have the weight you'd hoped for-- in fact, it feels kinda watery and floaty. Why? What happened-- this animator made "lazy or possibly ignorant inbetweens"... Meaning, he wasn't considering the transition of spacing from ones to 2's or he wasn't thinking period. The main parts of the test, you'll notice, is in the slow in's and out's and the contact of the ball. By the way, side note: you always need at least 2 frames of contact for it to actually read as a contact. Anyway, you think, huh, how can I fix this-- you need to respace some of your animation. You locate the problem areas and begin rethinking it. It seems floaty from 17 to 1, so you respace with place 18 as a half, 19 as a half, and 20 as a third (because that last inbetween needs to be a third to continue the slow out).


ball bounce - video powered by Metacafe

Ok, so it's looking pretty close now! That repsacing from 17-1 really helped! But man, it's still a tiny bit sticky on the contact, and it still doesn't have the punch on the impact that you wanted. What else is there to do? You've already respaced it to an extreme favor-- Whelp, just take out the drawing 10 and add one frame into your slow in at the beginning of the chart! Simple as that!


Ball Bounce - video powered by Metacafe

So yeah man, 1's can be tricky, and sometimes it's a trial and error thing to figure out what'll translate but I think the important thing here to remember is to PLAN FOR ONE'S. If you know your going to need to be doing something that requires 1's, plan for it, build it into your existing work that is on 2's. This is why I animate with the lightbox on, so I can see where my spacing is coming and going from. Spacing is one of those very important pieces of the animators tool-kit that so few truly understand. I'd like to do a whole other post on spacing when your animating your Keys on 3's: 1, 4, 7. but i'm affraid i don't have the energy at the moment! Thanks for continuing to visit everyone! I love hearing from you all, and please, feel free to ask any questions you want!