Assignment 1. Traditional Animation

Ashley Kim ([email protected])
2/13/2023

Part 1 : Keyframing

Using Maya, I made two walkcycles that portray two different moods for each character. The first is a slightly excited robot semi-dashing over, and the second is an old zombie trying to take few steps.

For each character that I downloaded from SketchFab, I made my own IK handles and animated the entire walkcycle from start to the end.

Walk Cycle 1 :

Walk Cycle 2 :

IK Process

Resources:

• Robot by Willy Decarpentrie
• Zombie by DJMaesen

Part 2 : MoCap Editing

This part is based on the start code for miniproject 1.

The code can be run by downloading this repo and running python3 main.py in terminal. If you have specific bvh files you'd like to combine or have specific destination location for the output to be saved, you can use the optional --src_path1 SRC1 --src_path2 SRC2 --dst_path DST flags to indicate them.

I made five modified functions of load function:

• loadTop : This function sets joints in the bottom half of the body to have offest of (0,0,0) so that any translation or rotation shows in the rendering.
• loadBottom : This function sets joints in the upper half of the body to have offest of (0,0,0) so that any translation or rotation shows in the rendering.
• loadMinusTop : This function sets rotations of the joints in the upper half of the body to (0,0,0) in Euler so that the motion movement doesn't show.
• loadMinusBottom : This function sets rotations of the joints in the lower half of the body to (0,0,0) in Euler so that the motion movement doesn't show.
• loadTwo : Taking in two file addresses, this function reads both and combines upper half motion of the body from the first file and lower half motion from the second file. I initially tried to load two animations via load then combine the two animation objects (attempt in combine function), but I couldn't figure out the translation conflict between Euler rotation in BVH file to Quaternion rotation in Animation object. Instead, I wrote loadTwo to combine the data of upper and lower halves of the body from two BVH files.

Example Edit Combination:

Reference:

• Holden, D., Komura, T., & Saito, J. (2017). Phase-functioned neural networks for character control. ACM Transactions on Graphics (TOG), 36(4), 42.
• How to Use Starter Code