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View, browse and sort the ever-growing list of sessions by day, pass type, topic, and format. With this Session Viewer, you can view GDC 2023 session details and speakers, and share your favorites via social media. You will be able to build your schedule and access it during the show via export or Mobile App, once live. Sessions do fill up and seating is first come, first serve, so arrive early to sessions that you would like to attend.

Math in Game Development Summit: Practical Projective Geometric Algebra

Eric Lengyel  (CTO, Terathon Software)

Location: Room 2001, West Hall

Date: Tuesday, March 21

Time: 4:10 pm - 5:10 pm

Pass Type: All Access Pass, Summits Pass

Topic: Programming

Format: Lecture

Vault Recording: Video

Audience Level: All

In this session, Eric Lengyel, CTO at Terathon Software, introduces recent advances in the understanding of geometric algebra. It discusses practical applications related to the kinds of geometric manipulation that often appear in game engines and other software dealing with 3D graphics.


Attendees will learn how to perform complex geometric calculations involving objects such as points, lines, planes, circles, and spheres in 3D space using the fundamental products in geometric algebra. This can often lead to simpler, more concise code that is easier to understand. However, geometric algebra is not always a win, and attendees learn when to stick with conventional methods for better performance.

Intended Audience

This is for engineers who work with mathematical code dealing with 3D geometry that would normally include vector and matrix calculations.