# Hierarchical Animation

Bridget Winn

CPE 471 - 01

Final Project

## Intro

My final project features three hierarchically modeled figures: a skipping young figure with a festive hat, a strolling middle-aged figure, and a floating astronaut. Each figure cycles through its individual animation.

## Demo

### User Functionality

To cycle through the three models, press the 'P' key.

To rotate any model about the y-axis, press the 'A' or 'D' keys.

Additionally, the astronaut model can be rotated about all axes. To rotate the astronaut model about the x-axis, press the 'W' or 'S' keys. To rotate the astronaut about the z-axis, press the 'Q' or 'Z' keys.

## Lessons Learned

### How Hierarchical Modeling Works

I had been exposed to hierarchical modeling from previous class work, but creating my final project really solidified my understanding of how it works. I also have a great appreciation for trig functions! Each cyclical animation is run on versions of sin(x). The astronaut needed to move slowly, so that movement is determined by sin(x / 5.0), which really slows that function down. The skipping figure moves much faster, and that movement is based on 10 * sin(x * 0.8). As a bonus, taking the absolute value of a sin function let me have further control of specific movements such as the middle-aged figure's slight up and down motion while walking.

### An Appreciation for Animation and Movement

I looked into traditional animation and read a few chapters on animating walks in The Animator's Survival Kit. This book is fantastic. It has great diagrams, sketches, and explanations.

I was surprised to find out how much I enjoy animating like this and dissecting movement. I spent a bit of time in the mirror working out how skipping works. This project really strengthened my appreciation for traditional animation; I can't imagine animating by hand.