Live test 2026-10-09: taps took several tries and the laser jumped between
hands. The owner's ray dropping for a moment (closing the fingers turns the
hand) handed the laser to the other raised hand at once, for good; a pinch
by the other hand pressed where the old owner's ray pointed; a pinch whose
ray had just dropped became a press at a stale spot, or only woke the
pointer.
- The owner keeps the laser through POINTER_RAY_GRACE (0.5 s) of its ray
being down; the other hand takes it by pinching, by raising its ray while
the owner's is down, or after the grace (pointer/helper/rayowner.h).
- A pinch on a ray that dropped within the grace, or is on its way up,
brings it back (fh_ray.h ShowForPinch) and is a ray pinch.
- Aim lock: the press goes along the ray from just before the fingers
began to close, after a pose along it has gone out; a tap that ends
before its press clicks there too.
- Each ray follows one tracked hand through a brief flip of ft-hands'
left/right call.
- Log: owner changes with the reason, the owner's ray down and back, and
one line per pinch saying what it clicked or why not.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
hands/include/fh_ray.h, shared by the pointer helper and ft-screens (design
sections 2.4-2.5): a body model (torso yaw = head yaw low-passed, at most
30 deg behind; shoulders from it), the ray from the shoulder through the
knuckles (20 ms prediction), the pointing gate (show tests for 120 ms,
hide after 250 ms of a failed keep test; near and "off" hide at once;
held through a ray pinch), and One Euro filters on yaw, pitch and origin.
- pointer/tests/handray-test.cpp: body, gate timing and tests, filter
(just test-c).
- ft-handreplay --ray FILE: per set and hand, what the helper reads.
- pointer/tools/rayeval: the ray over a replay, with the head poses from the
ft-handtest probe's log of the same session (clock matched by the
published capture times): how often it shows, why not, jitter, the ray's
shift into a pinch.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Per side, a controller used recently wins, else the bare hand
(pointer/helper/handoff.h, design section 1): touch and presses from the
input relay, motion, charging and tracking from SteamVR, and the tracked
hands from ft-hands' hands file (handsin.h, which also takes the gestures
reader and the head pose history out of ft-pointer.cpp).
- The relay's web socket reader (game_pause.py TouchTracker) sends
"ctl <side> touch 0|1", "ctl <side> press", "ctl <side> gone" and
"ctl ws 0|1" with POINTER_HANDS=1, and the pause state as "paused 1|0".
- The helper logs transitions and sends ft-screens "hands <L> <R> <allowed>"
(hand|controller|off, 0|1) on a change and every second. Nothing acts
on it yet.
- fh_gestures v3 adds the middle pinch slots (written as zero for now).
- Tests: pointer/tests/handoff-test.cpp (just test-c), input/test/touch-test.py.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
