Log replay (MCAP)

Can I scrub a drive log and see point cloud, pose, state and signals at the same instant?

Input: MCAP (json-encoded channels) — built-in synthetic drive or your own file
Output: Synchronized 3D replay, state swimlanes, multi-panel plots
Demos: 3 · all run in the browser

Loading engine

Drag to orbit · scroll to zoom

Point cloud (height)
Ego
Ground returns

Built with MCAP 3D replay

A 30 s drive is written as a real MCAP file with @mcap/core (chunked, indexed), read back with McapIndexedReader, and replayed: point cloud, ego pose, trail and topic list with a scrubber.

@mcap/core 2.2MCAP read/write
Foxglove schemasMessage layouts for PointCloud, Image, TF
Three.js r184WebGL scene, instancing, controls
FoxgloveReference layout for log review