The previous commit's clone removal corrupted the flip (shared live canvas overwritten mid-
animation -> flicker); reverting it fixed the flip but also discarded code that had ridden into
that commit and broke the page label. Recovering:
- Page label: the right-page pageNumber lookup returned null (meta not populated for the queried
index) so every spread read 0. Now derive the printed number from the index (frontmatter
pages 0-2 are unnumbered, so right-page index N prints as N-2), preferring the paginated
pageNumber when present. Title still reads 0.
- Restored the manual-navigation-busy guard and the written-content navigation cap (no flipping
forward into blank leaves before content exists; title stays on its own spread).
The flip flicker fix is the clone restoration in the prior revert; this restores the label and
navigation behavior on top of it. Suite 182. Flip-flicker and per-paragraph stutter still need
verification on a real (non-throttled) foreground tab.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Two changes:
Eliminate cloning in the publish path. The page-texture-records event is dispatched
synchronously and its handler uploads the canvas to a GPU texture synchronously
(renderer.initTexture), and the stored sourceCanvas is never re-read — so the per-draw
cloneCanvas of the page (and the now-static reveal base) was pure waste driving GC stalls.
publishSpread now passes the live page canvas and the cached base directly; cloneCanvas is
removed. Worst per-paragraph stall 1431ms -> 902ms (originally 2159ms); all stalls now <1s.
Title spread and labels (as specified):
- getMaxNavigableSpread caps to the spread holding the last written body page; before any
content exists the book stays on the title spread (forward nav disabled), instead of letting
you flip into blank leaves.
- spreadPageLabel reads 0 at the title and the printed page number of the spread's right page
elsewhere (was the raw right-page index, e.g. "3" before a game).
Verified live: title reads 0 with forward disabled; spread 1 reads 1; suite 182.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Builds on the worker migration with prepare-burst pacing and a title-flip fix:
- New game from mid-game left the book on the previous game's spread, so the first block's
source and target spread matched and the title->content page turn was skipped. story:client-reset
now returns the book to the title spread (spread 0) so the first block flips 0->1 and animates.
Verified: requiresSpreadTransition src=0 tgt=1, page-flip-started/near-end fire.
- The lookahead burst-prepared many blocks at once, spiking allocation/GC into multi-second
main-thread stalls. WebGL book prepares are now serialized through a chain and capped to a
small lookahead window (TTS audio prefetch still spans the full window); future lookahead is
also deferred until the current sentence has entered the display pipeline, keeping it off the
first flip/reveal critical path. Worst game-start stall ~6s -> ~3.4s.
- Page flips now drive the scene through the sceneControl prewarm/startPreparedPageFlip API
(awaited) instead of an event, and the scene awaits the async initial spread draw.
Suite 177. Remaining: a per-block prepare stall (~1.6-3.4s for large blocks at game start)
that profiling has not yet attributed to a single function (likely GC from prepare-path
allocation) — needs a DevTools performance capture for exact attribution.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
handlePageTextureRecords() called markStaticSceneBuffersDirty() on every page-texture update,
forcing a full SSAO + shadow + reflection recompute (23-47ms frames) on every block during
playback — even though a page-text change moves no geometry. AO and shadows depend only on
geometry; the soft tabletop reflection picks up the new page on its throttled cadence. Removed
the forced dirty so only real geometry changes (flips, camera, rebuild, resize) recompute the
static buffers. Playback median ~60->63fps; the per-block forced heavy frames are gone (the
remaining periodic ~23ms frames are the normal 8Hz throttled refresh).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Two robustness gaps from the worker migration, both raised in review:
- The raster worker had no failure recovery: a thrown createImageBitmap/font error or a
dropped message would leave the draw promise pending forever, stalling the serialized draw
chain and hanging prepare/playback. Added worker.onerror and a per-job timeout; both settle
the in-flight draw to a logged miss (texture-worker-error / -timeout) so the pipeline
degrades to last-good per the spec instead of hanging. A single settleRasterization path
clears the timer and resolves.
- prepareSpreadTextureRecordsForFlip() called drawSpread() without awaiting it. That was safe
when drawSpread was synchronous, but now that it is async (worker) the flip could race ahead
of the worker draw and miss the resident texture. prewarmFlipTextures now awaits both spread
draws before the resident-texture lookup.
Suite 168 (added assertions for worker error/timeout recovery and the awaited prewarm).
Normal draw path is behaviorally unchanged from the verified worker commit.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Two regressions made the cursor stop communicating game state:
- The canvas had a hardcoded `cursor: grab`, overriding the document-level process-state
cursor everywhere over the 3D scene (always a hand). Removed it so the canvas inherits the
state cursor; grab is now shown only transiently while right-drag-rotating the camera.
- normalizeProcessState pinned ready/waiting-generating to the playing (feather) cursor
whenever playbackCoordinator.isPlaying was set, which lingered at choice prompts — so an
open choice showed the feather instead of the input cursor. Now, when an input prompt is
open AND no sentence is actively playing (timeline's webglBookPlaybackActive), the playback
overlay is stripped (playing-ready->ready, playing-generating->waiting-generating) and the
input/server cursor shows. Opening an input mode also refreshes the cursor immediately.
Verified live over the canvas: feather while a sentence plays, input arrow at a choice/idle,
and they switch correctly with playback state (no stuck feather, no constant grab).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
primeSceneForLoader() compiled scene materials and rendered the shadow/reflection passes
once, but never ran the full composer pipeline — so the SSAO and output passes compiled
their programs and allocated their render targets on the first live frame after the loader
faded, tanking FPS for ~1-2s before it climbed to full.
Now the loader runs composer.render() twice during prime, and precompiles the flip page
materials (created lazily on first flip, so previously missed by renderer.compile) via a
throwaway probe mesh. The heavy first-frame work is paid behind the loader overlay instead.
Verified live: loader timings show composerWarmup taking ~1499ms during load (exactly the
cost that used to hit the first frame); after fade-out there are no over-budget tank frames
in the slow-frame log and idle settles at ~72fps. Static suite passes (165).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The table reflection (full scene re-render) and the book shadow maps each cost ~11ms/frame
and were refreshing at 30Hz even when nothing moved, so every idle/reveal frame paid for one
heavy pass on top of the ~12ms scene render — ~45-52fps.
These passes only need full-rate updates while the book geometry is actually moving (a page
flip). At idle, or during a text reveal where only the page texture mask animates, they now
refresh at 8Hz (candle flicker is the only thing changing them then, captured imperceptibly).
Most non-flip frames are then just the scene render.
pixelRatio is deliberately left at 2x: the book is tilted, so page glyphs are minified along
the tilt and the supersampling is the scene's antialiasing (the composer MSAA is disabled in
app-integration mode). Reducing it blurs text and exposes edge aliasing, so 60fps is bought
from the geometry-independent passes instead. Expressed pixelRatio via devicePixelRatio so it
stays native on HiDPI.
Verified live at WQHD/2x (screenshot-checked crisp text + clean edges): idle ~64fps median
(was 52), reveal ~66fps median (was ~33). Remaining single-digit dips are main-thread page
rasterization during background prepare — addressed by the worker migration.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Starting a new game reuses block ids (1,2,3...). The reveal clock's per-block
start times (activeRevealBlockStarts in the lab) and the renderer's animation/
revealed sets are keyed by block id and were never cleared on a client reset, so
a new game over already-cached content inherited the previous run's start times.
beginPageReveal then computed a huge elapsed and the shader treated the reveal as
already complete — showing everything at once instead of animating.
resetClientPlaybackAndDisplay (run on new game and restore) now emits
story:client-reset; the lab clears activeRevealBlockStarts/pending reveal state,
the texture renderer clears active animations and revealed-block ids, and the
timeline invalidates prepared segments. So each game starts with a clean reveal
clock.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- Navigation now operates on spread indices, not the non-contiguous page-position
scheme that mapped a forward step onto the same spread (so forward stalled and
triggered a no-op multi-flip). Forward/back move one spread; start/end and the
slider use spread indices. The page readout shows the odd page of the visible
pair (2*spread+1) or 0 at the title spread.
- Flipping forward could show the source page with its last word still masked: a
stale reveal mask left on the flip surface by a previous playback flip was not
cleared when the (finished) source page had no active reveal. Reset the flip
surface reveal shader in that case so the full page shows during the turn.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- Reveal timing is now word-proportional per page: when a block's reveal only
covers part of the block (the continuation spread is not paginated at reveal
time), the page reveals only its share of the TTS, offset by the words before
it. The right page no longer absorbs the whole TTS before flipping; it flips at
normal pace and the continuation resumes on the next spread while TTS plays. No
effect when the regions already cover the whole block (unified plan / one page).
- Page flip start now shows the target spread's same-side page beneath the lifting
page (revealed as it turns away) instead of a blank that pops in after the flip.
Deferred (pending-reveal) sides stay blank so the masked reveal still lands via
activate.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Establish book-playback-timeline as the sole playback owner driving the
scene through formal webgl-book:* events (not the BookLabDebug surface),
with a single reveal clock in the scene render loop and webgl-page-cache as
the only texture cache. Remove the legacy dual playback path and the
ownsPageFlipCommit gating.
Fixes:
- Flip page detached/folded at the spine: restore the raw page-cap line for
flip geometry (matches the prototype/pre-regression), removing
normalizeFlipLineToVisiblePage which moved the pivot off the spine arc.
- Flip textures: distance-based UVs (no horizontal compression),
direction-aware face material (source on the camera-facing side), source
meta derived from the visible spread (manual flips), prewarm shape fix.
- Reveal: flash removed on the static page and the flip back surface;
spanning blocks rebuild the reveal plan at activate and continue the
reveal on the next spread after the fill flip.
- Cache staleness is contentVersion-primary; nav clamps to spreadCount.
Docs updated to describe the intended single-owner architecture. Regression
checks updated to match.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Georg