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feat(sim+engine): lock alteration calibration + fix psychedelic dark grade

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Tuning the look by eye in the simulator (design §8) surfaced that the dark
mood pole rendered a full-frame hue-rotate(-200deg) — rock orange, trees
purple: the disorienting look rejected in session 0008, not the peaceful POC
dark_frame. Replace it with darken + slight desaturate on the video filter
plus a multiply-blended deep-blue wash (#tint, below the SVG HUD so the
overlay stays legible). Dark now reads cool/somber with natural greens, like
the approved POC look; light/left/right unchanged and confirmed peaceful.

With full tilt now tasteful on every axis, LOCK DEFAULT_CALIBRATION to unity
gains + linear variant map as a deliberate by-eye choice (not placeholders),
closing the open session-0006 knob->strength decision: knobs run 0=off..4=max,
equal Dark/Light = identity, the 5 notches map 1:1 to the 5 discrete Right
bakes. Guard the locked constants with test_default_calibration_is_locked.

Resolves design §8 open questions (calibration curve shape; grade-vs-overlay
ordering) and records the dark-grade fix. Full suite 193 passed / 2 skipped.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Ben Stull
2026-06-07 23:19:53 -07:00
parent 7d2a3064ad
commit 9c347d580f
6 changed files with 62 additions and 12 deletions
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player/alteration.py
+19 -1
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@@ -42,7 +42,25 @@ class Calibration:
right_variant_map: tuple = (0, 1, 2, 3, 4)
DEFAULT_CALIBRATION = Calibration()
# The LOCKED calibration (session 0010, 2026-06-07) — settled by eye in the
# simulator, closing the open session-0006 knob->strength decision. Convention:
# every experience knob runs 0 = off .. 4 = max, and equal Dark/Light = identity
# (raw footage); there is no "centered at 2 = no push" coordinate.
# - mood_gain = 1.0: full Dark/Light knob reaches the full mood grade. By-eye
# evidence (POC renders + sim, after the dark-grade fix this session) shows
# full tilt is peaceful on every axis, so no softening is warranted.
# - overlay_gain = 1.0: full Left = opacity 1.0; the HUD is legible, not
# overwhelming, sitting above the grade.
# - right_variant_map linear: the 5 knob notches map 1:1 onto the 5 discrete
# pre-baked Right strengths (0 = raw base).
# These are unity/linear by deliberate choice, not as placeholders. The curve
# stays parameterized so a future re-bake or a different feel is one edit away;
# test_default_calibration_is_locked guards the values from drifting silently.
DEFAULT_CALIBRATION = Calibration(
mood_gain=1.0,
overlay_gain=1.0,
right_variant_map=(0, 1, 2, 3, 4),
)
@dataclass(frozen=True)