Files
DeeJanuzandClaude Opus 5.5 499035216c Make hand tracking a Frametop component
- Programs: ft-camd (the camera broker), ft-hands (the tracker), and
  ft-handreplay and ft-ringplay for recordings, built by hands/build.sh
  into hands/build/ with one Makefile. The first build fetches ncnn at
  frame-hands' pinned tag and builds it with the same options.
- ft-camd gets its privileges from file capabilities (CAP_SYS_PTRACE,
  CAP_PERFMON, CAP_DAC_READ_SEARCH) that hands/run.sh install sets with
  sudo, and drops them once set up. It still works under sudo. It runs
  on the host, linked statically, as frametop-camd.service. ft-hands
  runs in the dev container as frametop-hands.service. Both start and
  stop with SteamVR.
- Files move to /run/user/UID/frametop/ (cam-ring, hands, gestures),
  not $XDG_RUNTIME_DIR, which a terminal in the Frametop desktop has
  its own of. SIGUSR1 recordings go to ~/.local/share/frametop/hands.
- The calibration is read through /run/host in the container.
- Settings: HANDS_SWAP_SIDES and HANDS_CPUS in frametop.conf.
- install.sh offers hand tracking as an optional last step.
- The container gets jsoncpp-devel, glibc-static, and NumPy and OpenCV
  for the Python tools.
- tools/ring.py reads the ring, and models/NOTICE credits the
  Apache-2.0 models.

Checked: ft-handreplay gives identical summaries and byte-identical
depth dumps to frame-hands' fh-replay on both 2026-09-29 recordings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 09:15:07 -06:00

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Bash
Executable File

#!/usr/bin/env bash
# Build hand tracking in the dev container on the Frame, into hands/build/: ft-camd and ft-hands,
# and with --tools also ft-handreplay and ft-ringplay. The first build fetches ncnn and builds
# it (a few minutes); NCNN=DIR, an ncnn install already on the Frame, skips that.
# A rebuilt ft-camd has lost its capabilities: hands/run.sh install sets them again.
set -euo pipefail
root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
targets=all
[ "${1:-}" = --tools ] && targets="all tools"
"$root/scripts/sync.sh" >/dev/null
exec "$root/scripts/frame.sh" -C hands "make -s ${NCNN:+NCNN=$NCNN} $targets && echo built \$(ls build/ft-* | tr '\n' ' ')"