Files
Syplheed-Reborn/tools/re-capture/pitch_gametime.py
Claude (auto-RE) 8b10c0451f re(flight): the clock factor is universal — angular matches too once corrected in-run
pitch_gametime.py brackets each turn phase with HUD screenshots, so the mission
clock's own advance converts wall seconds to game seconds within the same run:

  this run's clock: TIME 00:33.68 -> 00:44.12 = 10.44 s game in 7.96 s wall = 1.311

  pitch @ min speed  88.9 deg/wall-s  /1.311 -> 67.8 deg/game-s  vs AV_PitchMinus_Min 75
  pitch @ max speed  53.6            /1.311 -> 40.9             vs AV_PitchMinus_Max 40

Both land on the definition (the slow phase 10% low, consistent with including the
AA_* ramp in an 8 s window), so the clock explanation covers angular motion as well:
every stated rate is per GAME second.

The ratio is not a machine constant — 1.260 in the earlier flight, 1.311 here — so it
must be measured in the same run as whatever it corrects. Bonus: the same shots show
the HUD reading 102 at full LT against MinimumVelocity 100.

Also documents the trap that cost three runs: a killed Canary leaves both its shm
image and its last frame on screen, so a dead emulator looks alive and the scans
report "0 moving triples" like a tooling bug. pgrep -x matches zombies, so
speed_law.require_live_emulator() checks the process state letter and refuses to
measure a corpse.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NptfmpjdpNCKEez6d2xvA9
2026-08-13 17:56:16 +00:00

73 lines
3.1 KiB
Python

#!/usr/bin/env python3
"""Is the clock factor universal, or does it apply only to linear motion?
The mission clock runs ~1.26x wall time, which fully explains the linear
measurements. Applied to the angular ones it predicts a wall-time pitch rate of
~94 deg/s for `AV_PitchMinus_Min` 75 — but the settled measurement read 74.9.
Either that was luck inside a noisy sample or angular integration is frame-based.
The flaw in comparing across runs is that the emulator's speed depends on scene
load, so the clock ratio is not a constant of the machine. This measures BOTH in
the same run: a HUD screenshot brackets each turn phase, so the mission clock's
own advance over that phase converts wall seconds to game seconds.
Usage: pitch_gametime.py <out.csv> [dwell_s] (then read the HUD TIME off the shots)
"""
import json, math, os, struct, subprocess, sys, time
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import speed_law
def pad(*a):
subprocess.run(["vgamepad", *a], capture_output=True)
def shot(n):
subprocess.run(["screenshot", f"/sylph-home/re/shots/{n}.png"], capture_output=True)
def row_at(fd, off, cfg, row):
at = off + cfg["rot_delta"] + row * cfg["rot_stride"]
v = struct.unpack(">3f", os.pread(fd, 12, at))
n = math.sqrt(sum(c * c for c in v)) or 1.0
return tuple(c / n for c in v)
def ang(a, b):
return math.degrees(math.acos(max(-1.0, min(1.0, sum(a[i] * b[i] for i in range(3))))))
def main():
out_csv = sys.argv[1]
dwell = float(sys.argv[2]) if len(sys.argv) > 2 else 8.0
cfg = json.load(open("/tmp/nav-live.json"))
w, off, nm = speed_law.find_player()
if not w:
sys.exit("player entity not found after retries")
print(f"# locked on {nm}")
fwd = cfg.get("fwd_row", 0)
rows = []
for label, (trig, tv) in (("slow", ("LT", 1.0)), ("fast", ("RT", 1.0))):
pad("trig", "RT", "0.0"); pad("trig", "LT", "0.0"); pad("axis", "LY", "0.0")
pad("trig", trig, str(tv))
time.sleep(5.0)
shot(f"gt_{label}_a") # HUD TIME at the start of the phase
t0 = time.time()
pad("axis", "LY", "1.0") # nose down = PitchMinus
seq = []
while time.time() - t0 < dwell:
seq.append((round(time.time() - t0, 3), *row_at(w.fd, off, cfg, fwd)))
time.sleep(0.05)
pad("axis", "LY", "0.0")
wall = seq[-1][0]
shot(f"gt_{label}_b") # HUD TIME at the end
rows += [(label, *s) for s in seq]
total = sum(ang(seq[i][1:], seq[i + 1][1:]) for i in range(len(seq) - 1))
print(f"# {label:<5} wall {wall:5.2f}s swept {total:7.1f}deg "
f"rate {total / wall:6.1f} deg/wall-s "
f"(x1.26 -> {total / wall * 1.26:6.1f} deg/game-s if the clock applies)")
pad("trig", "RT", "0.0"); pad("trig", "LT", "0.0"); pad("reset")
with open(out_csv, "w") as f:
f.write("phase,t,fx,fy,fz\n")
for r in rows:
f.write(",".join(str(x) for x in r) + "\n")
print("# read HUD TIME off gt_slow_a/b and gt_fast_a/b to get the run's own ratio")
if __name__ == "__main__":
main()