frame

It seems like you're interested in the concept of "frame" as it relates to the content presented at Apple's WWDC. Here are some relevant insights from the sessions:

1. WebXR Frame Loop: In the session titled "Build immersive web experiences with WebXR," the concept of a frame loop is discussed. In WebXR, a frame loop is established by using requestAnimationFrame to queue up actions for the next frame. This is similar to standard web animations but is synced to the WebXR display, which typically runs at a faster frame rate than a standard web browser. This ensures that the numerical positions of various tracked objects are updated in reference to the requested reference space.

2. Swift Performance and Call Frame: In the session "Explore Swift performance," the call frame is discussed in the context of function execution. The call frame is a memory allocation that provides space for a function to execute, and it is deallocated once the function returns. This is an efficient way to manage memory during function calls.

3. Rendering and Frame Timing in visionOS: In the session "Render Metal with passthrough in visionOS," frame timing is crucial for rendering content accurately. The session discusses how the timing of frame presentation affects the accuracy of anchor post-prediction functions, emphasizing the importance of querying anchors and device poses at optimal times for better results.

If you have a specific question about frames in any of these contexts, feel free to ask!