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Adding Squash and Stretch

Learn how to use the Set Ease for Multiple Parameters tool to add some ease-in and ease-out to your animation. Stacey shows you how to loop a specific segment of your animation. Finally, convert your interpolation to keyframes on every two frames using the Create Keyframes On tool and add some stretch and squash to some of the frames.

About the Author

Stacey Eberschalg

Stacey Eberschalg

Toon Boom Software Instructor and Animator

Toon Boom Animation

Toon Boom

Video Transcript

Hello, welcome to Part 4 of Making Our Ball Bounce.

And what we had finished in the last part of our [project] is we were basically left with something that looked like this. And the first thing I want to adjust in this is the timing. Because we want to show there is a bit of gravity as it falls, it's going to accelerate. And as it hits the ground and moves up, it's going to go from fast to slow. So I'm just going to click on my first keyframe and I'm going to find something that we call our Velocity Editor, or are Set Ease for Multiple Parameters and I'm going to open that up.

Inside here gives us the keyframing. You can see that the animation is on the right side of the keyframe. And if I was on this keyframe, the information is happening on the left side. So clearly, my keyframe is on frame 1 and the animation is happening to the right time value. So I'm going to make this value quite high. Maybe I'll make it 80 and Apply.

And you can see that now it's going to go slow to fast. Anything that is on the horizontal is slow. Anything that's on the vertical is fast.

And you can see that we have quite a bit of... we almost have until frame 11 of a little bit of horizontal, that just completely drops off. And what that's going to look like when I play it back is you go slow to fast and there's going to be nothing at the end. Then I'm going to go to the last keyframe and I'm going to basically do the same.

Oh excuse me, I'm going to go do the same. I'm going to move over here and I'm going to press 80. Apply.

And now our animation is going to look slightly different. It's going to go slow. It's going to speed up. It's going to be going fast and moving to slow.

If I just press stop here and Loop, you'll get an idea of the way that the timing will look different. Okay.

You can see now it eases up and it eases out.

Now the first thing I can do is I can take all of this animation and put it on twos. So I'm going to select this group of frames. And press this button: Create Keyframes On. All the frames are going to be on frame 2, from frame 1 to frame 31. And now we have everything simply on twos.

One of the things I want to change is I want to make this last drawing flat. Just to give it a little of... I'm just zooming in by pressing the number [2].

Make that one squash a little bit. And what I'm going to do with this other frame I'm going to just mildly take that and I'm going to favour it to the bottom. I'm trying to keep the volumes pretty simple. I'm going to make it speed up, but the one thing I also might want to do is remove some of these tweens. Maybe these ones.

Re-inbetween it, so as the ball is falling, you can see it's starting to change its shape. And now just put those keyframes back.

So now the change we have is look a little bit more like that. And I'll do the same thing on the way up. Maybe this one I'll give a little bit of stretch to. Maybe I'll do this one manually. I'll just give it a little bit less squash.

And let's take a look at what our final result looks like. Well this is a very rubbery ball. It's changing shape quite a bit in this action. Maybe I've made it a little bit too much. But you're getting the idea of how to use some of the tools in Harmony to do a simple bouncing ball.

Thank you for your time and hope you enjoyed the videos.