https://yingyueue.myblog.arts.ac.uk/2 0 2 2 /1 0 /3 0 /animation/>?

By Yingyue Feng ：< https://yingyueue.myblog.arts.ac.uk/author/20028722/?

30th October 2022 ：< https://yingyueue.myblog.arts.ac.uk/2022/10/30/animation/>

In the animation stage, first I refer to the animation principles of some 2D quadrupeds. Woods S. THE ANIMATOR’S SURVIVAL KIT[J]. Film Ireland, 2002. This book is very useful. Although research on the principles of animation of quadrupeds in 3D is difficult to find, the 2D aspect is very complete. So I referenced a lot of information in this area, and based on these materials, I made animations of walking and running of quadrupeds. Although when I started animating, I found that my cat didn’t walk or run like that at all.?

However, the animation principles part of this book is very useful, and this is also a must-learn course for all animation majors.?

The animation part is divided into three parts. I animate the cat’s body part first, then the cat’s ears and tail, and finally the cat’s expression.

The whole animation The animation process was more difficult than I thought, because the cat’s movements are very large, but the cat hardly has any repetitive movements. Moreover, the cat’s movement speed is also very fast, which is very difficult for me to make animations. Sometimes I need to K several poses per second.?

And cats have a very special bone structure. Studies have shown that cats have wider vertebrae with elastic fibrocartilage interspersed between the vertebrae, which makes cats more flexible. This body structure makes cats more flexible than big cats. Second, they can rotate the spine 180 degrees, while humans can only rotate 90 degrees.?

Because the cat’s reaction ability is very fast, the cat’s action frequency is fast and the amplitude is large, so it has caused great difficulties and troubles in the process of making animation.?

There are several poses in a second. Mochi’s body often twists from an S-shape to an inverse-S-shape within a few frames because the core of the controllers is on his butt, and if you adjust one of them, the others follow. So while range of motion doesn’t seem to matter, all of the body’s controllers need to be adjusted. Also, it’s much harder to animate a 4-legged animal than a 2-legged human. The time it takes for each of his feet to fall and lift is different. These all require frame-by-frame, controller-by-controller adjustments.?

And for the convenience of animation production, I chose the tail and ear parts to form a lot of mels, and the tail to form two mels. First the whole tail is one mel, then the second half of the tail is another mel, so it’s a lot easier for me to animate the selection controller.?

It should also be noted that because what I want to make in the end is the AR effect, I need to see this animation from different angles. It is very perfect, and there will not be any strange places, so I put it when making the animation. There are three cameras, front, side and back. When you take a screen shot later, you can easily observe it from multiple angles to see if there are other bad points, and it is also easy to modify.?

I originally planned to combine three screen shots from different perspectives into one video for broadcast, but because the screen shot was imported into the software, the report was wrong, so I divided it into three uploads.