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re: F6 unit 9 -- sweep period and onset, as ratios reproduced across two runs

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Two captures of the same animation disagree on frame counts by 1.947x, so
frames are not comparable across runs. Expressed as ratios to a long
in-capture baseline, both runs agree: loop period = 13.93 baselines (0.35%
apart), and the sweep starts 0.79-0.80 baselines BEFORE the plate (0.9%).

This answers F6: the sweep does not start at t=0 as the port has it, nor
exactly with the plate -- it leads the plate by about 40 title units, under
a second, which is consistent with what the human reported seeing.

Surfaces a conflict rather than smoothing it: unit 8's title rate of 1.0
units/frame (from ptcopyright) and the plate's 0.571 units/frame are 1.75x
apart in the SAME capture. Either an element's declared ramp is misread or
the two are not on one clock -- the port's clock:"shared" premise. The
ratios stand without a clock; the title-unit conversions are 🟡 pending F4.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
This commit is contained in:
sylph-decoder
2026-09-02 19:20:30 +00:00
parent a726391ead
commit 15207b1c74
2 changed files with 82 additions and 4 deletions
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10
tools/re-capture/title_sweep_probe.sh
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@@ -25,19 +25,21 @@ win="$(xdotool search --name "Xenia-canary" | tail -1)"
xdotool windowactivate "$win" 2>/dev/null; xdotool key --window "$win" F10; xdotool key F10
echo "armed at ${SECONDS}s"
sleep 12; pad "press=A"; sleep 0.4; pad ""; echo "A (skip video) at ${SECONDS}s"
# ⚠️ ARMING IS NOT CONFIRMED BY SENDING THE KEY. Twice now a probe has printed
# "armed", pressed on, and written no draw log at all -- once because the window
# lookup failed, once with the window found and the key sent. A probe that cannot
# confirm its own instrument is recording is a probe whose negatives mean nothing.
# So: wait for the log to exist AND grow, and abort loudly if it does not.
for _ in $(seq 1 20); do
for _ in $(seq 1 45); do
sz=$(stat -c %s "$OUT"/xenia_re_ui_draws_*.log 2>/dev/null | head -1 || echo 0)
[ "${sz:-0}" -gt 0 ] && break
sleep 1
done
[ "${sz:-0}" -gt 0 ] || { echo "FATAL: armed but no draw log after 20s -- not recording"; pkill -x xenia_canary; exit 1; }
[ "${sz:-0}" -gt 0 ] || { echo "FATAL: armed but no draw log after 45s -- not recording"; pkill -x xenia_canary; exit 1; }
echo "logging confirmed at ${SECONDS}s (${sz} bytes)"
sleep 12; pad "press=A"; sleep 0.4; pad ""; echo "A (skip video) at ${SECONDS}s"
sleep 150 # let the title build in and settle, no further input
sleep 260 # long enough for TWO leaf wraps, not one
pkill -x xenia_canary
echo "done at ${SECONDS}s"; ls -la "$OUT"/*.log 2>/dev/null