4bcb35cef7
screen-transitions.md carried a 14-unit "black hold" that the page itself flagged as arithmetic rather than measurement. Measured it against the running game; the guess was wrong, and finding the instrument to measure it turned up a second, larger error in the same page. 1. fade_quads.py was STALE. It read each pose's time from blk+36 -- the next record's time word -- the association the keyframe record-layout fix retired in the crate. sylpheed-cli was rebuilt at the time; the Python helper was never swept with it. Signature: it cannot time a group's last pose, so it printed a trailing `t=-`. Fixed, controlled against the rebuilt `screen info` ([0 12 70 80] for build 5's pteff00.prm). 2. Through it, the page labelled the quad's CLEAR-hold as its fade-in and published 0.87 s / 0.97 s / 4.08 s for a ramp that is 0.20 s / 0.20 s / 0.27 s. A port pacing its menu fade-in off that would run it 5x too slow. 3. The measurement. fade_decompose.sh boots to the main menu, arms the UI draw capture there, then presses (B), so one 260-frame window holds the whole screen change. The fade quad is identified rather than guessed: a .prm carries no tex[base=] and paints last, so it is the last full-screen untextured quad of a frame. Control first -- the quad's ramp is decoded at 10 units = 5 frames, and measures 4 submitted-frame steps with one unlogged frame in the span. Result: content elements begin fading at frame 34; the black quad first appears at 40 and is opaque by 43; the menu's last frame is 45; frame 46 has 6 draws against 12. So the ~14 extra units are the content's own fade-outs OVERLAPPING the quad's ramp, not a hold after it, and the inter-screen black is one frame. Refutation attempted: sylpheed-port's entries 13/14 twins. Re-derived off the disc -- 3.06 / 4.33 / 47.91, identical to two decimals. Recorded as confirming their addressing and arithmetic, NOT as independent support: same renderer, same disc, which is their own rule. Reach: one transition, one run; the frame axis has gaps (232 headers over frames 3..260), so every span is +-1 frame. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
44 lines
2.3 KiB
Plaintext
44 lines
2.3 KiB
Plaintext
# Menu -> title transition, per-frame, from the running game.
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# tools/re-capture/fade_decompose.sh -> log_ui_draws capture (260 frames)
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# tools/re-capture/fade_envelope.py (the fade quad = last FULL-SCREEN
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# UNTEXTURED quad in a frame: a .prm carries no tex[base=], and the fade
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# quad paints last).
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# Xenia VdSwap frame numbers. 2026-08-30.
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#
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# TIMING CHECK: F10 armed the capture at frame 1; the script sent (B) 1.2 s
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# later. 1.2 s at 30 Hz is frame ~36. The fade begins at 34. The press and
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# the transition agree without either being used to place the other.
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#
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# frame untextured full-screen quad alphas, in submission order
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28 [[64]] draws= 12 tex= 10
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29 [[64]] draws= 12 tex= 10
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30 [[64]] draws= 12 tex= 10
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31 [[64]] draws= 12 tex= 10
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32 [[64]] draws= 12 tex= 10
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34 [[64, 255], [64]] draws= 15 tex= 12 <- content starts fading
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35 [[64, 223], [64]] draws= 15 tex= 12
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36 [[64, 207], [64]] draws= 15 tex= 12
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37 [[64, 175], [64]] draws= 14 tex= 11
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39 [[64, 95], [64]] draws= 11 tex= 8
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40 [[64, 31], [64], [102]] draws= 12 tex= 6 <- BLACK QUAD APPEARS
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41 [[64, 15], [64], [127]] draws= 12 tex= 6
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43 [[64], [64], [255]] draws= 12 tex= 6 <- fully black
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44 [[64], [64], [255]] draws= 12 tex= 6
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45 [[64], [64], [255]] draws= 12 tex= 6
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46 [[64]] draws= 6 tex= 2 <- menu stops drawing (6 draws vs 12); ONE frame of black
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47 [[64]] draws= 8 tex= 6
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49 [[64]] draws= 8 tex= 6
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50 [[64]] draws= 8 tex= 6
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51 [[64]] draws= 8 tex= 6
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52 [[64]] draws= 8 tex= 6
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53 [[64]] draws= 8 tex= 6
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54 [[64]] draws= 8 tex= 6
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55 [[64]] draws= 8 tex= 6
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56 [[73]] draws= 8 tex= 6
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57 [[93]] draws= 8 tex= 6
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58 [[113]] draws= 9 tex= 7
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59 [[152]] draws= 12 tex= 10
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60 [[172]] draws= 12 tex= 10
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missing submitted frames in this span: 33->34, 37->39, 41->43, 47->49
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