GDC 2014

GDC 2014 Session Scheduler

View, browse, and sort the ever-growing list of GDC sessions by pass type, track, summit, format, and day. With GDC Session Scheduler you can build your schedule in advance, and access it during the show via export or with the GDC mobile app, app.gdconf.com. Please note that adding sessions to your schedule does not guarantee you a seat in that session. Sessions do fill up, so please arrive early to sessions that you would like to attend.

Start building your GDC agenda — create your linked account for the GDC Session Scheduler and the GDC Mobile App now!

Register now for GDC 2014!

Please note: Registration accounts are separate from Session Scheduler. Even if you've registered, please create a Session Scheduler account below.

Export Schedule:

Concurrent Interactions in The Sims 4

Peter Ingebretson  |  Senior Software Engineer, Electronic Arts (Maxis)
Max Rebuschatis  |  Software Engineer III, Electronic Arts (Maxis)


Location: Room 304, South Hall

Format: Session
Track: Programming
Vault Recording: Video


In real life, people often do several things at the same time, but games typically limit agents to performing actions sequentially. For The Sims 4, we developed a system for authoring interactions that allows simulated people (called Sims) to express multiple concurrent behaviors. Interactions are largely data-driven and are defined in terms of constraints, which specify the state a Sim must be in to perform the interaction. Constraints are used to test whether interactions are compatible, and to drive decisions that Sims make about whether, how and where to perform an interaction. This system allows Sims in The Sims 4 to convincingly eat, watch TV, chat with other Sims, express emotion, and perform many more behaviors simultaneously. We believe that this powerful and simple technique could be applied to a similar effect in your game too.

Takeaway

Attendees will learn a powerful and practical technique for defining composable behaviors using constraints. Constraints can drive decision-making and allow multiple behaviors to be expressed simultaneously. This technique allows characters in The Sims 4 to eat, watch TV, and socialize with other Sims, all while sitting, expressing anger, and much more.

Intended Audience

The main audience for this presentation will consist of software engineers who are curious to learn a new technique to add to their toolboxes. The presentation will also be of interest to designers and producers, who should be inspired by the possibilities that are unlocked by constraint-driven behaviors. This presentation has no prerequisites.