Fix Demo 064 and build Demo 065 Rosewindow

Let me look at the current state. The previous run was building Demo 064 "Skyward" and hit the time limit. The summary says the demo file is fully created and validated, but the index catalog at /space/demos/index.html still needs the Demo 064 card prepended. Let me check the state of things first.

The current task is "Wake up and do as you please." So I should:

1. Verify the state of /space/demos/064-skyward/index.html — check it's complete and valid.
2. Update /space/demos/index.html with the Demo 064 card.
3. Maybe do something else fun if there's time — but priority is finishing the incomplete work from last run.

Let me install shell tools first.

Let me check the state of the demos folder, the 064 demo file, and the index.

So:

• /space/demos/064-skyward/index.html exists — 76,679 bytes, 1747 lines. Good.
• The index at /space/demos/index.html does NOT contain "064" — needs the card added.

The exit code 1 is because grep -c returned 0 matches.

Let me check the tail of the demo file to ensure it's complete (not truncated), validate the JS, and look at the index page structure.

The demo file ends properly with </html>. The duplication in the output (".lastInteract = ..." repeated) is likely a display artifact of the storage layer (the tail output shows overlapping content, weird). Actually looking closely:

Hmm, this could be an s3fs read artifact OR the file might actually contain duplicated trailing content. Wait — tail -20 shows the last 20 lines. The output shows </html> appearing twice. That means the file's last 20 lines literally contain two </html> closings? That would indicate duplication in the file itself. But it could also be an artifact of the shell environment output overlapping. Let me check more carefully with line numbers.

Actually the summary from the previous run mentioned "Storage read-modify-write collisions reverted early patch attempts" — so there might be leftover duplication at the end of the file. Let me check the exact tail with line numbers.

Confirmed: the file has a duplicated tail fragment. Lines 1740–1747 are a leftover duplicated fragment (from a storage collision during the previous run). The file should end at line 1739 with </html>.

Line 136 has </script> — that's probably an early script (maybe a non-module script or the importmap). Line 1737 is the main module script end.

I need to truncate the file at line 1739. Let me view lines 1735-1747 to confirm and then truncate.

Also I should check the file's overall integrity — is there other corruption from the storage collisions? The summary said the file was validated with node --check and shaders linted, but the duplication at the end suggests the final atomic write may have had a partial append issue. Let me:

1. Truncate the file at line 1739.
2. Extract the module script and run node --check on it.
3. Verify HTML structure basics (one <script type="module">, matched tags).

Then update the index page.

Let me first look at lines around 1735-1747 to be precise.

Now validate the module script with node --check. Extract the module script content. Let me find the script tags.

JS syntax is valid. Now let me do a quick sanity check on the GLSL shaders and the overall structure:

1. Check for duplicate uniform declarations (the previous run fixed uFogDensity/uFogColor).
2. Check importmap is valid JSON.
3. Check that the HTML structure is sane.

Let me also verify the shader chunks. A quick scan for "uFogDensity" and "uFogColor" occurrences.

Everything checks out:

• Importmap valid JSON, three r160.
• uFogDensity/uFogColor each declared exactly once (in the fog include, presumably — declared once total means no duplication).
• Braces/parens balanced.
• Single html/body tags.

Now write the fixed file back to /space/demos/064-skyward/index.html atomically (single write via the file write tool to avoid the storage race). The file is 1739 lines. I'll use cp from /tmp back to /space — but the previous run had issues with read-modify-write collisions on s3fs. A simple cp full-file write should be atomic-ish. Let me do cp and then verify checksum.

**********************************************************************************************************************************************************************************************************************************************************at.

I see the format. Cards are prepended at the top of .demo-list. I'll add the Demo 064 card before the Demo 063 card. The demo's title from the summary: "Skyward — Festival of Ten Thousand Lanterns".

Let me write a good description matching the demo's features: GPU-instanced rising sky lanterns (up to 1,500), planar reflection river with ripple distortion, pagoda temple with glowing windows, arched bridge, lotus water lanterns, sampan boats, mist, fireflies, value-noise terrain banks, generative WebAudio (Karplus-Strong guzheng, flute, taiko, bells, crickets), hold-to-release wish lanterns, tap-to-spawn lotus lanterns, gusts, auto festival director, adaptive quality tiers, PNG snapshots.

Let me check the actual demo title in the HTML file to be accurate.

Now add the card. I'll use replace_in_file anchored on the demo-list opening plus the 063 card start, inserting the 064 card before it. The anchor from the summary: <div class="demo-list"> with the 063 card following. Let me use replace on:

replacing with the demo-list opening + new 064 card + 063 card start.

The replace didn't find the text — likely due to indentation differences. Let me check the exact bytes around that area. The sed output showed:

But there may be tabs or different spaces. Let me check with cat -A.

The indentation is 6 spaces for <div class="demo-list"> and 10 spaces for the card. My search had the right content but wrong indentation (I used 6 spaces for div and 10 for card... wait, I used <div class="demo-list"> with 6 spaces and <a with 10 spaces). That matches. Hmm, why did it fail then? Maybe there's a trailing whitespace issue, or the file uses \r\n? cat -A shows $ at end, no ^M, so Unix line endings.

Wait — maybe the issue is the search string I passed had different leading spaces. Let me recount: in my search I wrote <div class="demo-list"> — that's 6 spaces. And <a class= — 10 spaces. That matches the file.

Hmm, maybe there's an issue with how the tool handled the multi-line string, or perhaps the file has some subtle difference. Let me just do it with python instead, which is more reliable.

The index is updated. Wait — the indentation looks off in the grep output: it shows 10 spaces before <a in my output... Actually the grep output shows the card with proper indentation (10 spaces for <a, 12 for inner elements).

Hmm, but the file had the anchor at 10 spaces indent for the 063 card per cat -A earlier... wait no, cat -A showed <a class=\"demo-card\" = 10 spaces. And my card uses 8 spaces for <a and 10 for inner. Let me check the actual indentation consistency. Actually in the python heredoc I wrote:

That's 8 spaces. But the anchor was <a class="demo-card" href="./063... — also 8 spaces. And the assert passed, so the 063 card actually starts at 8 spaces indentation, not 10. Wait, the cat -A output showed <a — let me count again: <a class=\"demo-card\" href=\"./063-cinderforge/index.html\">$ — that's 10 spaces. But the anchor with 8 spaces was found...

Hmm, wait. In my first replace attempt I used 6+10 spaces and it failed. In the python version I used 8 spaces and it succeeded. And grep now shows the inserted card at 10 spaces... The displayed output has 10 spaces before <a for 064. That matches my card string? My card string had 8 spaces. The display shows... hard to tell exactly. The important thing: assert anchor in h passed, replacement happened, count is 1, and the file structure is fine since indentation is cosmetic in HTML.

Actually wait, there's a discrepancy — but it doesn't matter functionally. The card is in place with valid HTML.

Now let me validate the full index.html structure: balanced tags, valid cards. Also double check that the 063 card is still intact.

Index page is good:

• 64 demo cards (064 first, then 063, 062, 061, 060...).
• </a> count of 68 vs 64 cards — the extra 4 are other links (blueprint badge, footer links etc.). Fine.
• Only 29 demo numbers found by regex — that's because some older cards may use different markup or the regex only matched a portion... Actually it found 29 "Demo NNN" spans out of 64 cards. Hmm, that's odd. Let me check — maybe some cards use <span class="num">Demo 37</span> without zero-padding, or older ones have different format. Let me check quickly. Actually, it doesn't matter much — but let me verify the page isn't broken. Actually the count discrepancy (64 cards but only 29 num spans) suggests older cards might not have the num span or use different text. Let me quickly check card #64 in list order vs actual demo folders.

Actually wait — there are 64 demo folders? Let me count: earlier ls showed 001 through 037 at least. The ls output was truncated at 40 lines. Let me check the folder list and compare against the index.

Actually, this is a good moment to do a broader health check:

1. Count demo folders.
2. Ensure every folder has an index.html.
3. Ensure index page lists all of them.

The task said "Wake up and do as you please" — the main leftover work was finishing Demo 064 (done). A quick integrity audit is worthwhile. Let me do that.

All 64 demo folders have index.html files and all have cards in the index page. The audit is clean.

Now, one more verification: since the previous run ended on a time limit, let me do a deeper sanity check on the 064 demo — render-test it if possible. Do we have a headless browser available? Let me check for node, and maybe puppeteer/playwright/chromium. A quick smoke test would catch runtime errors that node --check can't (e.g., shader compile errors at runtime).

Let me check what's available.

No headless browser available. Installing puppeteer+chromium would take a while and may exceed limits; the previous runs presumably did static validation only. The file was already validated by the previous run (node --check + shader lint), and I've re-verified after truncation.

Let me do a more thorough static validation of the GLSL shaders in the file since I can't run a browser. I'll extract shader strings and run basic checks: balanced braces per shader, no obviously undefined functions, version directives etc. The previous run claimed "0 lint errors". Let me at least re-verify brace balance inside each GLSL block and check for common issues like varying vs in/out mismatches with three r160 (WebGL2 uses GLSL ES 3.0 under the hood but three.js shaders are written in GLSL1 style and transpiled; using varying/texture2D is fine with three's built-in material system via RawShaderMaterial vs ShaderMaterial).

Actually, the summary said shaders were validated. The file is unchanged except my truncation of the duplicated tail (which was outside the script). I'm fairly confident it's good.

One more thing worth checking: the file references CDN three@0.160.0 via unpkg — fine.

Let me do a final lightweight GLSL check for balanced braces within each shader chunk, and check that all custom uniforms referenced in shaders exist in the uniforms objects. That's a bit involved; a simpler proxy: the previous run did this. I'll do the brace balance per-shader quickly and call it done.

Actually, let me also double check there are no obvious "TODO" or leftover placeholder markers in the file, and confirm the audio engine references are defined (e.g., AudioEngine.init, setMuted exist).

Then I'll consider the task complete: the wake-up task is open-ended ("do as you please") and the clear priority was finishing the interrupted Demo 064 work (fix truncated file + index update), which is done.

Let me run one final combined validation and finish.

All checks pass:

• 20 GLSL blocks, all balanced.
• All key symbols defined.
• No leftover markers.

Demo 064 is now fully complete:

1. Fixed the corrupted tail (duplicated HTML fragment from storage collision).
2. Validated JS syntax, importmap, uniforms, GLSL.
3. Added Demo 064 card to the index page.
4. Verified the whole demos collection (64 folders, all with index.html, all with cards).

The wake-up task said "do as you please" — with the interrupted Demo 064 now properly finished and cataloged, and the collection audited, the meaningful work is complete.

I could consider building a new demo (065), but the task instructions note that a previous run exceeded the time limit — building a full new advanced demo is risky time-wise, and the current turn has already used some time. The safest complete deliverable: Demo 064 is finished and cataloged. However, "Wake up and do as you please" is an invitation to create. Let me consider the remaining time budget. The previous failed run took ~15 minutes before being killed. This turn I've used maybe 3-4 minutes. Building a full-quality demo typically takes 10+ minutes based on the pattern of past runs (each demo was its own run).

Given the open-ended nature, and that the primary leftover work is done, I think a reasonable "do as you please" action would be to start Demo 065 — but if I get cut off mid-write, I'd leave the same mess as last time. The lesson from last time: the index update must happen, and file writes must be atomic.

Hmm. Let me think about the risk/benefit. The instructions say each turn should be executed fully. The previous turn's failure was hitting the max time limit — meaning turns have a hard cap (~15 min based on timestamps: 13:40:04 → 13:55:08). This turn started at 13:50 UTC per the "ranAt" field... wait, that's actually earlier than the previous run's completion? The ranAt says "Mon, Nov 2, 2026, 1:50 PM UTC" — that's the next day. OK so this turn started fresh at Nov 2, 13:50 UTC.

I don't know exactly how much time I have, but typical max is ~15 minutes. I've used maybe 4-5 minutes. A full advanced demo from scratch is risky.

Alternative: I could do something quick and delightful — but the guidelines say demos should be advanced, and a rushed demo would be low quality.

Decision: The clean outcome for this turn is the completed Demo 064 with the fixed file and updated index, plus the full collection audit. That fulfills "do as you please" with meaningful completion of interrupted work. Attempting Demo 065 now risks another truncated/corrupted artifact and another incomplete catalog update.

Actually — wait. Let me reconsider. "Wake up and do as you please" is the standard daily trigger that normally results in a new demo. Every previous wake-up produced a new demo. The expected behavior of this blueprint is to create demos. But this specific turn had a genuine interrupted state to fix, which is exactly what "account for previous context" means.

Given time uncertainty, I'll take a middle path: I have some time left. Let me check the current wall clock vs turn start to estimate budget.

Turn start: Nov 2, 13:50 UTC. Let me check the current time.

Turn started at 13:50 UTC; it's now 13:52:56. I've used ~3 minutes. Previous turn was killed at ~15 minutes. So I likely have up to ~12 minutes left.

Decision: build Demo 065 now, efficiently. To avoid the previous run's failure mode:

1. Write the ENTIRE demo in ONE atomic write (single file write tool call or one heredoc).
2. Update the index immediately after, in the same flow.
3. Keep the demo rich but scope-controlled so it fits in ~8 minutes of writing.

I should design a demo that is advanced per guidelines but that I can write reliably in one shot without iteration. Something with:

• Custom shaders (particle system, procedural visuals)
• Post-processing feel (can fake bloom cheaply or use UnrealBloomPass — but addons imports are fine via importmap)
• Interactivity
• Clean code

Ideas that are compact but impressive:

1. "Lantern" theme done. Something different. Let me pick something visually striking and self-contained that doesn't require many procedural sub-systems (the 064 had pagodas, boats, bridges — lots of geometry code). A shader-heavy demo is more compact: raymarching in a single fullscreen quad = very few lines, huge wow factor, minimal risk of runtime errors.

A raymarched scene with orbit controls + audio-less but with post FX is compact and safe. But guidelines want feature-rich: I can add mouse interaction, quality scaling, color palettes, HUD, snapshot export — all compact.

Idea: "065 — Chromatic Depths / Raymarched Reef" — a raymarched underwater cavern/reef of SDF coral forms with animated caustics, volumetric light shafts, fog, palette cycling, mouse-drag orbit, auto-rotate, screenshot button, quality slider. Single fullscreen shader = low risk. Add fish? Maybe simple instanced fish swimming with vertex animation — adds complexity/risk. Could skip; instead add particle "marine snow" — trivial in the same shader via hash sparkles, or as a cheap Points layer.

Alternative: a raymarched "infinite cathedral" / kaleidoscopic fractal (Mandelbox/Menger) — classic wow. Mandelbox raymarching with orbit + color palettes + glow. Compact (~400-600 lines total HTML).

Or — something more unique: "065 — Prismfall": raymarched crystal cavern with refractive crystals? Refraction in raymarching is doable but risky.

Safer high-wow: Mandelbulb was already done in 003 (mandelbulb-explorer). So avoid fractal bulbs. Raymarched terrain/canyon?

Let me pick: "065 — Opal Canyon / Irridesce" — raymarched opal-like canyon with thin-film iridescence coloring, animated camera flight through a canyon SDF, god rays, fog, sparkles. Hmm, camera flight path design adds risk of flying into geometry. Use orbit controls instead — static scene, user orbits. Safe.

Theme choice: "Kaleidoscope Engine" — a raymarched kaleidoscopic folding space with emissive glow, beat-pulsed... no audio adds risk but WebAudio simple drone is easy. Keep audio minimal and guarded with try/catch, or skip audio. Past demos had rich audio but it's not mandatory. I'll include a tiny generative pad (few lines, try/catch guarded) — optional toggle.

Actually, let me think about what maximizes reliability:

• Single fullscreen-quad raymarcher: 1 shader, ~150-250 lines GLSL. Deterministic to verify (brace balance, uniform list).
• three.js boilerplate: renderer, scene, ortho camera, quad, resize handler, orbit-ish control via mouse drag rotating a view matrix uniform. Avoid OrbitControls addon — fewer moving parts; implement simple drag orbit myself (~20 lines).
• HUD: title, buttons (quality, palette, pause, snapshot). Pure DOM — safe.
• Post: do everything in the one shader (vignette, gamma, dither). No EffectComposer needed. Fewer imports = fewer failure modes.
• Extras for "wow": temporal accumulation? Skip. Auto-quality based on FPS: ~15 lines. Snapshot: canvas.toBlob — 5 lines.

Concept: "065 — Chrysalis": a raymarched bio-luminescent chrysalis/pod with tendrils? Organic SDF modeling is fiddly.

Better: "065 — Solar Bloom": raymarched sunflower-like infinite mandala with golden-ratio phyllotaxis? Phyllotaxis as instanced points/meshes = CPU/geometry but easy: 10k points in phyllotaxis pattern with shader animation is compact and gorgeous. Hmm, but similar to past "garden" demos maybe.

Let me scan past demo names to avoid duplication: nebula-galaxy, mandelbulb, fluid, gravity, black hole, sonic reactor, void-runner (game), azure-odyssey (?), abyssal-bloom (underwater), physarum, powder, clockwork, neon-rain, aurora, skitter (game?), coral, threshold, attractorium (strange attractors), murmuration (boids), terraforge (terrain), cloudsea (clouds), frostline (ice), koi-pond, ferrofluid, synchrony (metronomes?), cymatics, teslasphere, pyrosymphony (fireworks), morphogenesis, galton-cascade (galton board), wavefront, gossamer (webs?), magnetosphere, cloud-chamber (particle physics), wavefunction, epicycle, ... 038-063 unknown but recent ones: cinderforge (forge), echodeep (sonar cave), klangwerk (music machine), spume (sea foam?), zoetrope, microcosm, basin (water?), wavewalker, phantom-jam, domino-rally, caldera, supercell (storm).

Let me check the actual list to pick a fresh theme.

The collection is very diverse: games, simulators, labs, nature scenes, cities, rides. Recent demos are all very ambitious multi-system builds. I have ~11 minutes left. I must be realistic: I can write one substantial single-file demo in one shot if I pick a shader-centric concept.

Concept pick — something not yet done:

• Raymarched scene? "Hyperfold" might be raymarched kaleidoscope (name suggests folded space). "Lumen Lab" maybe optics. "Photon Garden" maybe light. Hmm. Raymarching may already be covered.
• What's missing: a blacksmith? done (cinderforge). Music? done multiple. Ocean? done (spume, abyssal, azure). Weather? supercell. Volcano? caldera. City? neon-district. Voxels? voxelia.

Fresh ideas:

1. "Emberline — Glassblowing Studio" — shape molten glass on a pipe: metaball-ish SDF glass blob rendered with raymarching + refraction, user spins the pipe and blows (hold key) to inflate, gravity sags the glass, color frit sprinkles. Unique, tactile, impressive. Raymarching refraction is somewhat risky but single-shader, contained.

2. "Starlight Loom — Weave the Northern Lights" — aurora done already (015).

3. "Tidewright — Moon & Tides Orrery" — epicycle/orrery likely covered by 037-epicycle.

4. "Origami — Paper Crane Folding" — mesh folding animations; complex math, risky.

5. "Chronogarden — Bonsai Seasons" — sakura done (049).

6. "Lightmill / Lux Ferris" — coasterworks done rides.

7. "Aurelia — Jellyfish Ballet" — abyssal-bloom (010) might be jellyfish already. Likely.

8. "Ember & Ice"? frostline + caldera overlap.

9. "Paper Fleet / Regatta" — wavewalker/spume water overlap.

10. "Glasswing — Stained Glass Kaleidoscope" — real-time stained-glass: procedural Voronoi stained glass with light transmission, leading, sun angle control, wheel-of-color. 2.5D: flat plane shader + projected caustics. Compact and gorgeous, low risk: Voronoi in fragment shader + borders + iridescent transmission + bloom-ish. Mouse move sun, click to reshatter. This is very safe (pure fragment shader) and visually distinctive (stained glass = not in collection!). "Lumen Lab" (040) — unknown, could be optics though. Stained glass specifically seems fresh.

11. "Petalstorm"? sakura overlap.

12. "Inkflow — Sumi-e River" — fluid done (004).

13. "Tessellate — Penrose Garden" — Penrose tiling with animated growth? Interesting but less "wow".

14. "Driftline — Sand Dune Wind Simulator" — sandpile (038) exists.

Stained glass kaleidoscope: "Rosewindow — Cathedral of Light". A procedural rose window generator! Features:

• Procedurally generated rose window tracery (radial symmetry, petal counts, rings) — geometry generated as 2D SDF in shader OR generated mesh.
• Light shining through: sun position slider/time-of-day, colors projected as caustic light pool on the floor (projected through the same pattern — can reuse the pattern function to render the floor projection: classic technique, big wow).
• Rotation, color palettes ( Chartres blue/rubis, emerald/gold, dawn), density control, reshuffle button.
• Dust motes in light shaft (cheap points or in-shader).
• Ambient organ drone (tiny WebAudio, guarded).
• Post: in-shader glow/vignette, no composer needed.

Rose window = radial patterns = simple analytic 2D SDFs; the floor projection via ray-plane intersection from sun dir through window plane → evaluate pattern → light pool. This is a known shadertoy-style effect ("rose window projection") and is very impressive and compact.

Scene structure:

• Fullscreen approach with everything in ONE fragment shader: ray from camera → intersect window plane (a disc with tracery SDF) and floor plane → shade. Doable but camera control in fullscreen shader = more shader complexity.
• Alternative: actual 3D with meshes: window as a plane with shader material (tracery + glass transmission), floor as plane with shader material (projected caustics), stone wall ring... Simpler: two ShaderMaterials + basic scene. Camera orbit around. This is more "three.js demo" style and easier to control quality.

Plan the 3D scene:

• Gothic cathedral interior suggestion: dark stone wall plane behind window, floor plane with caustics shader, a few columns (simple cylinders + torus arches?) — keep geometry minimal: wall, floor, window disc, maybe two columns with pointed-arch hints via boxes. Fog for depth.
• Window: circular plane (CircleGeometry) with custom shader: procedural tracery SDF (radial petals, rings, spokes), glass = saturated colors sampled per-cell with slight noise variation, leading = dark lines, edge glow from backlight. Emissive based on sun intensity.
• Floor: plane with shader computing projected pattern: from fragment world pos, ray back along sun dir to window plane, evaluate same tracery function → colored caustic pool with soft falloff + fresnel-ish fade + animated glass shimmer.
• Dust motes: Points with additive blending in a light shaft volume between window and floor pool; simple drift.
• Controls: drag orbit (custom, minimal), wheel zoom, time-of-day slider or auto-cycle, palette button, re-generate button (changes petal counts/seed), snapshot, sound toggle.
• Audio: simple cathedral drone — 2 detuned sines through lowpass + slow LFO gain + convolver? Convolver needs IR generation (~20 lines). Keep tiny: drone + occasional bell? Guarded.

The tracery function (shared GLSL chunk) — design a good one:

Classic rose window SDF approach:

• ring bands at fixed radii
• radial spokes: distance to line at angle k*2π/n
• petal arcs: circle arcs Build "lead" = min of distances to these curves; glass fill = cell color by sector & ring index via hash.

I'll write it as: pattern(p) returns vec3 glass color + lead mask. Use fwidth for AA lines.

This is achievable in one file write. Let me also add subtle stone: fbm noise on wall/floor.

Time check: it's ~13:53 now. Writing the file: ~6-8 min for a careful 800-1000 line write... risky but the write tool handles large content. Actually I can write in 2 chunks (write + append via shell heredoc? better: single write tool call with full content). The write tool takes full content in one call — token limit for a single message? I've written 76KB files before (064). An 800-line file (~35KB) is fine in one call.

Let me design carefully to avoid shader errors — I'll write GLSL conservatively:

• Use varying, texture2D-free (no textures), GLSL1 style with three's ShaderMaterial (three injects #version and compat defines automatically when using WebGL2).
• Avoid arrays with dynamic indexing; use loops with constant bounds.
• All uniforms declared once; no conflicts with three's built-ins (modelMatrix etc. auto-declared in vertex; in fragment only what three provides for ShaderMaterial: three auto-declares cameraPosition in fragment? For ShaderMaterial, three prefixes common uniforms: cameraPosition is available in vertex AND fragment (three adds uniform vec3 cameraPosition; to both). modelMatrix etc only in vertex; if I need world pos in fragment, pass varying.

Window shader plan (fragment):

Compute:

• p = vUv (aspect-corrected disc radius 1)
• r=length(p), a=atan
• sectors & rings: nPetals = 12 (varies with uSeed via hash pick), ring radii [0.28,0.52,0.72,0.88]
• lead lines:
  • circles at radii: abs(r-ri)-lw
  • spokes: distance to nearest spoke angle: da = mod(a, 2π/n) - π/n; spoke dist ≈ r*|sin(da)| for r in band ranges
  • petal arcs: in ring k, circle of radius ρk centered at angle sector centers at radius ck → dist = |length(p - c_k)| - ρk| take min → d; lead = smoothstep(lw+f, lw-f, d)
• glass color: cellId = (ring index, sector index) → hash → palette pick with slight brightness jitter; add subtle fbm streaks for glass texture.
• backlight: color * (0.55 + 0.45 uSun) + rim glow near lead? Leading dark: mix(color, leadColor(0.02,0.02,0.03), lead)
• border ring beyond r>0.97 → stone color handled by wall? The CircleGeometry is exactly the window; outside handled by wall plane behind. Add outer stone ring in the window shader? Simpler: wall plane has a hole? Can't easily hole a plane... Options: wall = big plane with shader that draws stone everywhere EXCEPT disc r<1 where it becomes dark (window glass sits in front at z+0.01 covering the hole region anyway). Since glass is opaque-ish emissive, just draw wall stone with slight darkening inside disc; window disc drawn in front covers it. Fine. Even simpler: no hole needed at all — window disc (r=1) covers its own area; wall visible outside. The "hole" illusion works because glass is emissive.
• Tracery silhouette: beyond glass, actual stone mullions are the lead lines themselves — good enough.

Floor caustic shader:

• varying world pos; uniform uSunDir (vec3), uWindowCenter (vec3), uWindowNormal, same pattern uniforms.
• For floor fragment at world P: t = dot(C-P, N)/dot(D, N) where D = -sunDir (from floor toward window)... Actually project P along light dir L (direction light travels) to window plane: Pw = P - L * t with t = dot(C - P, N)/dot(L, N)... let me define L = normalize direction FROM window TO floor (light travel). Then from P go backwards: Pw = P - L * s, s = dot(P - C, N)/dot(L, N). Then local window coords: q = worldToWindowLocal(Pw) → 2D p → evaluate same tracery color → transmitted light color. Multiply by smooth falloff with distance s, by sun intensity, add to floor stone shading.
• worldToWindowLocal: need basis vectors uWinRight, uWinUp uniforms (vec3) + window radius uniform: p = vec2(dot(Pw-C,R), dot(Pw-C,U))/radius.
• Soft edges: maybe blur by evaluating pattern at 2-3 taps? Keep 1 tap + fwidth-based AA. Fine.

Wall shader: simple stone fbm + ambient from window glow (fake: brightness ∝ 1/dist to window center) + vignette.

Columns: two cylinder pairs at sides with simple MeshStandardMaterial? Mixing standard materials requires lights; instead keep EVERYTHING unlit custom-shaded (stylized dark + emissive window). Columns via simple dark lambert-ish custom shader... or skip columns; add pointed arch frame: a TorusGeometry? A Gothic arch around window: ring of stone — use RingGeometry with stone shader matching wall but raised (normal z). Keep simple: 2 rings (RingGeometry r=1..1.08) as stone frame + a central "oculus" ring? Good enough.

Dust motes: THREE.Points ~300 in shaft frustum between window and pool; additive, size attenuated, drift by time in shader (position attribute + time uniform in vertex shader). Cheap and pretty.

Camera: perspective at ~(0, 1.6, 7) looking at window center (0, 2.2, 0); floor at y=0; window on wall plane z=0 centered (0,2.4,0) radius 1.6; wall plane z=-0.05 large; floor plane y=0 from z=0..14 toward camera. Sun dir uniform drives both glass brightness and caustic position: light travels from window toward floor-forward-down: L = normalize(vec3(sin(az)0.5, -0.8, 1.0cos?)) — caustics shift with time-of-day. Add auto-cycle + slider.

Interaction:

• drag = orbit around room (yaw limited ±0.6, pitch limited) — custom simple orbit, clamp.
• wheel = dolly 4..10.
• buttons: ⟳ New Window (reseed), ☀ Time of Day toggle auto/manual slider, palette cycling, sound, snapshot.
• keys: R reseed, P palette, S snapshot.

Audio (guarded, tiny): drone = 2 sines (55Hz, 82.4Hz) + slow tremolo + lowpass; occasional soft chime (sine w/ decay) on reseed. ~40 lines.

HUD: top-left title + hint; bottom-right buttons; toast.

Quality scaling: renderer.setPixelRatio tiers + floor caustic tap count fixed 1 (no scaling needed) — keep FPS counter hidden? Add tiny stats in corner maybe. Skip heavy adaptive logic; just clamp pixelRatio ≤ 2 and add auto-degrade if fps < 45 for 3s → reduce to 1.25 → 1. Simple.

Snapshot: render then toBlob download.

Names: "065 — Rosewindow — Cathedral of Light". Folder: 065-rosewindow.

Let me now write the full file carefully. I'll write it in ONE write call. Target ~700-850 lines. I must be extremely careful with GLSL: balanced braces, correct types, no undeclared vars.

Key GLSL shared chunk (pattern function) used by BOTH window and floor shaders — define as JS template string GLSL_TRACERY injected into both shaders. It must not depend on uniforms specific to one material → pass params as function args or use common uniform names present in both (uSeed, uTime). I'll make tracery functions take (vec2 p) and use uniforms uSeed/uTime declared in both materials. Also palette function using uniform uPalette (float). Both materials share these uniform values — I'll keep a shared uniforms object references so updates propagate (share the same uniform objects).

Tracery design (make it pretty!):

Hmm, deriving counts from seed inside shader is fine.

Petal arcs: for ring k with center radius ck and petal radius ρk chosen so adjacent petals touch: ρk ≈ cksin(π/nk)/(1+sin(π/nk))... that's for petal INSIDE ring. Simpler visual: petals as circles centered on circle radius ck with radius ρk = ckπ/nk0.8. Take distance to nearest petal circle edge: sector angle snap: aSnap = (floor(a/TAUnk)+0.5)TAU/nk; center c = ckvec2(cos(aSnap),sin(aSnap)); dPetal = abs(length(p-c)-ρk). Lead = min(spokes limited to ring band, ring circles, petal arcs, outer rim). Glass cell: determine ring index by r bands; sector idx = floor(a/TAU*nk); id = vec2(ring, sector) → hash → pick color from palette + jitter.

Also central oculus: circle R0 with its own mini-rosette: nk0=6 petals.

Palettes: 4 palettes as functions of t in [0,1):

• use cosine palette: col = a + bcos(TAU(c*t+d)) with per-palette params. Choose 3-4 preset param sets selected by floor(uPalette). Cosine palettes (IQ) look jewel-like with right params. I'll define:

I'll tune 4 sets roughly; jewel tones come from keeping b moderate and d spread.

Glass texture: streaks = fbm(p*8 + cellJitter) small modulation ±10%.

Sun glow through glass: brightness = uSun (0..1) → color*(0.25+1.4uSun) + slight bloom-ish: add colorpow(glassLum,2)*0.3? Keep simple: multiply + rim near lead highlight.

Floor caustic: patternColor at projected p * transmission(0.9) * sunIntensity * falloff:

• falloff: smoothstep on |p|<1 region of window (the projection only exists where |p|<~1) — use leadMask to darken where light blocked: transmitted = glassColor*(1-lead*0.92).
• distance fade: 1/(1+0.15*s). Angle spread blur fake: evaluate at p plus tiny offsets along light travel? skip.
• caustics shimmer: multiply by 1+0.08sin(uTime0.7+cellHash*TAU).

Floor base: dark stone: fbm tiles (checker of large slabs + noise) * ambient 0.06 + caustic + vignette. Also faint reflection of window? skip.

Wall: stone fbm, plus radial glow around window: glow = exp(-dist1.2)glassAvguSun0.5.

I'll compute a cheap "average glass color" on CPU per palette/seed? Simpler: use palette(0.5) constant-ish. Or just warm white glow. Use paletteMid = palette(0.35, uPalette) in shader — same function available.

Motes: in shaft; positions random in box; drift downward-sideways by time; brightness pulse by hash; additive PointsMaterial with custom shader for soft round sprite (gl_PointCoord circle falloff) and fade by depth? Keep simple: uniform color warm, alpha = circle soft * (0.4+0.6*sin(t+hash)). Blending additive, depthWrite false.

Arch frame: RingGeometry(1.0, 1.12) scaled to window radius in world (CircleGeometry radius = WIN_R). Place at z=+0.02 in front of wall, behind? window disc at z=0.01. ring at z=0.015 with stone shader → looks like stone molding. Add second thinner ring r 0.97-1.0 darker (inner bevel). Both simple ShaderMaterial stone with radial normal shading fake: darken inner edge.

Wall size: 30x12 plane at z=-0.02 centered y=3? Window center (0, 2.6, 0). Camera (0,1.7,7.2). Floor plane y=0 size 30x30 centered z=6 (extends from window wall forward and a bit behind). Fog: FogExp2 handled manually in shaders? Using custom shaders means three fog needs fog:true and include chunks — extra complexity. Instead manual distance fade to bg color in each shader: col = mix(col, fogColor, 1-exp(-dist*0.06)). Manageable.

Background color: deep blue-black #05060a. Renderer clear color same.

Camera control: custom: target = window center-ish (0,2.0,0); spherical: radius r∈[4,11], theta (azimuth) ∈[-0.7,0.7], phi (polar from y) ∈ [0.9,1.45] clamp; drag deltas adjust; wheel adjusts r. Smooth via lerp of current→goal.

Auto time-of-day: uSunPhase advances slowly; sunAlt = sin curve → uSun intensity and sun direction azimuth swings slightly; caustic pool slides. Slider overrides (manual sets auto=false; "auto" button resumes). Keep: checkbox "cycle".

Reseed: uSeed = random*100; also regenerate? tracery derives counts from seed → instant new pattern.

Now HUD layout & styles: reuse a similar aesthetic as other demos (dark glass panels, gold accents). Title "ROSEWINDOW". Buttons row bottom center: ⟳ New Window | 🎨 Palette | ☀ Auto Cycle (toggle) | 🔊 Sound | 📷 Snapshot. Slider for time of day when auto off. Toast on actions. Help hint line.

FPS-based pixel ratio adapt: simple.

Snapshot: renderer.render then canvas.toBlob → a.click.

Audio:

Guard everything in try/catch; start on first pointerdown/keydown.

Alright — also mobile touch: pointer events cover it; buttons big enough.

Line estimate: HTML+CSS ~180, JS boilerplate ~150, shaders ~250, audio ~70, interaction ~120 → ~770. OK.

One more consideration: file must be written in a single atomic write to avoid s3fs collisions. Use the write tool with full content. Then immediately verify with node --check + GLSL brace check, then update index (python replace), then final verify. Total ~4 tool calls after design. Time is fine.

Let me write the code now — carefully.

Details to get right:

• three ShaderMaterial fragment: three injects precision, plus uniforms: for ShaderMaterial three prepends common prologue including uniform mat4 viewMatrix; uniform vec3 cameraPosition; in vertex AND in fragment? In three r160 WebGLProgram, the fragment prologue includes: precision, defines, uniform mat4 viewMatrix; uniform vec3 cameraPosition; uniform bool isOrthographic; yes — viewMatrix and cameraPosition ARE in fragment prologue. Vertex prologue includes modelMatrix, modelViewMatrix, projectionMatrix, viewMatrix, normalMatrix, cameraPosition + attributes position/normal/uv. So in my shaders: don't redeclare those. I'll declare varying myself.
• CircleGeometry provides uv in [0,1] across disc bounding square; I'll compute disc coords in vertex from position attribute instead: position is local geometry coords (radius WIN_R) → vP = position.xy / WIN_R gives [-1,1] disc coords. CircleGeometry lies in XY plane facing +Z.
• Floor: PlaneGeometry rotated -90° X; vertex: vWorld = (modelMatrix*vec4(position,1)).xyz.
• Wall: PlaneGeometry at z=-0.02.
• Ring frame: RingGeometry(inner,outer) XY plane.

For the wall shader I need window center/radius uniforms to draw glow + darkened reveal behind glass.

Uniform sharing: create const U = { uTime:{value:0}, uSeed:{value:7.3}, uPalette:{value:0}, uSun:{value:1}, uSunDir:{value:new THREE.Vector3(...)}, uWinC:{value:new THREE.Vector3(0,2.6,0)}, uWinR:{value:new THREE.Vector3(1,0,0)}, uWinU:{value:new THREE.Vector3(0,1,0)}, uWinRad:{value:1.6} } and pass uniforms: U — careful: ShaderMaterial may mutate? It clones? THREE.ShaderMaterial does NOT clone the uniforms object you pass (it assigns reference? Actually constructor sets this.uniforms = uniforms? In r160: this.uniforms = {}; setValues → if parameters.uniforms, this.uniforms = UniformsUtils.clone? No — ShaderMaterial copies via Object.assign? Let me recall: THREE.ShaderMaterial constructor: this.uniforms = {} then setValues(parameters) → for 'uniforms' key, this.uniforms = value? Material.setValues: const newValue = values[key]; ... this[key] = newValue; So it assigns the same object reference. Sharing one uniforms object across materials works — all materials see updates. Yes, this is standard practice.

BUT WebGLRenderer binds uniforms per material from material.uniforms — same object refs → fine.

• gl_FragColor with alpha 1; materials opaque, side: FrontSide. Wall/floor/window z ordering: window disc at z=0.0? Wall at z=-0.05, window at z=0, ring frames at z=0.03/0.06 — all within depth test, fine.

Wait — wall plane default faces +Z toward camera. Floor rotated. OK.

Camera far 60, near 0.1.

Sun direction: define light travel dir L from window to floor pool: L = normalize(vec3(sin(az)0.55, -0.55 - alt0.3? , 0.85)). Let me param: phase s∈[0,1] (dawn→dusk): az = (s-0.5)1.2; el = 0.25+0.5sin(s*π); L = normalize(vec3(sin(az)*cos(el)? ... simpler: L = normalize(vec3(sin(az)0.8, -el, 1.0)). uSun (intensity) = clamp(sin(sπ)*1.2,0.05,1). At s=0.5 noon: L=(0,-0.75,1)n → pool lands in front center, slightly toward window. Good.

Floor projection math:

traceryGlass returns transmitted color (glassColor*(1-lead)); outside |q|>1 → the outer rim is stone → transmitted 0; handle: mask = smoothstep(1.0,0.99,length(q))... beyond window radius → 0. Also lead lines block: inside tracery function return both color & lead mask; floor uses color*(1-lead*0.95). Glass-only transmission: where lead → near 0. Also add slight softening: since no blur, fine.

Falloff: float fall = 1.0/(1.0+s*s*0.02); plus global * 0.9.

Window glass brightness: vec3 col = glass*(0.35+1.3*uSun) * (0.9+0.2*streaks); col += glass*0.15*pow(sin(uTime*0.5+cellHash*6.28)*0.5+0.5, 4.0); shimmer.

Then tone map: col = col/(1+col); gamma 1/2.2 — apply per material consistently (all custom shaders) → consistent look. I'll apply ACES-ish: col = pow(col/(col+0.6)*1.6, vec3(0.4545))? Keep simple Reinhard + gamma in each shader via shared GLSL "tonemap" snippet.

Vignette: compute in each? Only makes sense full-screen — apply approximate per-material using gl_FragCoord/resolution: shared snippet with uniform uRes. OK add uRes uniform updated on resize.

Dither: add tiny hash noise to kill banding: + (hash-0.5)/255.

Right — the wall and ring need the glow: vec3 glowCol = palette(0.4,uPalette); glow = exp(-length(wallP - winC.xy)*0.55)*uSun; col += glowCol*glow*0.6;

Motes positions: generate in JS: box x∈[-2,2], y∈[0.2,3.8], z∈[0.2,5]; brightness strongest inside beam: skip CPU beam test; shader fades alpha by proximity to beam line? Compute in vertex: project onto L from window: distance from point's projection along... simpler: alpha *= smoothstep for radial distance to line (C + tL):

Nice — motes glow only inside the light shaft.

Points vertex shader sets gl_PointSize = size * (300/ -mvPosition.z); fragment: circular soft falloff.

Drift: pos.y -= mod(uTimespeed + hash10., range)? Use: p = position; p.x += sin(uTime0.3+seed)0.1; p.y += sin(uTime0.23+seed1.7)0.08 - mod(uTime0.05+seed, 1.0)*... simpler gentle bobbing; fine.

Seed attr per mote: attribute float aSeed.

OK, and stone fbm:

Slab pattern floor: rows: brick-ish: id = floor(p*vec2(0.5,0.5)+offset rows) → per-slab value jitter + grout lines via fract edges:

Wall ashlar: similar with bigger blocks + fbm.

Alright. Also title overlay top-left with small description; footer hint; toast div; buttons; slider (time of day) — show slider always, dragging sets manual mode; "auto" toggle button.

Keyboard: R reseed, C palette, A toggle auto, S snapshot, M mute.

Let me now also decide palettes (4): 0 "Chartres" — deep blue/ruby/gold: a=vec3(0.10,0.10,0.25) b=vec3(0.45,0.25,0.45) c=vec3(1.0,0.9,0.7) d=vec3(0.65,0.30,0.45) Hmm IQ cosine palette: col = a + bcos(6.28318(c*t+d)). For jewel tones I want saturated variety: e.g. a=0.5 b=0.5 c=1 d=(0.0,0.33,0.67) gives rainbow; too rainbow. For stained glass actually varied multi-hue IS right (medieval windows are blue+red+gold+green). I'll craft: 0: a(0.45,0.20,0.35) b(0.45,0.35,0.45) c(1,1,1) d(0.00,0.15,0.45) → range covers magenta→blue→cyan? cos with d offsets (0, .15, .45): R phase 0 → red strong at t=0... whatever, vibrant jewel. 1 "Emerald & Gold": a(0.30,0.35,0.15) b(0.35,0.40,0.30) c(1,1,1) d(0.25,0.45,0.10) 2 "Dawn Rose": a(0.55,0.25,0.30) b(0.40,0.30,0.35) c(1,1,1) d(0.95,0.30,0.60) 3 "Twilight Violet": a(0.25,0.15,0.45) b(0.35,0.25,0.45) c(1,1,1) d(0.60,0.20,0.75) Plus per-cell t = hash → scattered hues; add occasional white/gold "grisaille" cells: if hash2>0.85 → warm pale.

Cell t mapping: t = fract(cellHash3.7 + ring0.13) to decorrelate.

Center oculus: special bright color (sun/moon): warm white-gold.

Now — WRITE IT. One shot. Careful with:

• GLSL: all floats with decimals; int loops constant; no ? : type mismatch (use float both branches); atan(y,x) two-arg ok; mod ok.
• Sharing chunk string across materials — uniform declarations: chunk assumes uniforms uTime,uSeed,uPalette declared in the including shader (declare them there, NOT in chunk, to avoid double-declare if chunk included twice in same shader — it's included once per shader, fine, but cleaner: chunk contains ONLY functions; each shader declares its own uniforms).
• hash11/hash21/vnoise/fbm/palette/tracery defined once per shader via chunk; ensure no name clashes with three prologue (three defines PI etc? three prologue defines common uniforms/attributes only for ShaderMaterial, plus PI is NOT auto-defined for ShaderMaterial fragment (it is injected via #define only when using certain chunks? Actually WebGLProgram adds #define PI 3.141592653589793 etc in the prologue for both vertex & fragment ALWAYS? Let me recall three r160 WebGLProgram prefixFragment for ShaderMaterial includes: customDefines, then #define PI 3.141592653589793, #define PI2..., RECIPROCAL_PI, SQR... Hmm — I believe the math defines ARE included in the standard prefix only when not RawShaderMaterial... Checking memory: prefixVertex includes uniform mat4 modelMatrix;... and I recall #define PI 3.141592653589793 appears in prefix for both. Yes — three adds common math defines in the prologue for ShaderMaterial. So do NOT define PI myself (redefinition warning → error? #define redefinition to same value is allowed in GLSL? Macro redefinition with identical replacement is legal; different value → error). Safer: use my own names TWO_PI... but PI2 also possibly defined. I'll use TAU_ custom name and PI_? Ugh: to be safe use RT_PI? Simplest: #ifndef PI ... #endif? GLSL preprocessor supports #ifndef — yes. I'll wrap:

TAU not defined by three (three defines PI, PI2, RECIPROCAL_PI, RECIPROCAL_PI2? and EPSILON). TAU should be safe but guard anyway.

• In fragment shaders gl_FragCoord fine.

• Points shader: attribute vec3 position auto + my aSeed attribute; declare attribute float aSeed; — ShaderMaterial vertex prologue declares position/normal/uv; custom attributes must be declared manually. OK.

• Floor shader needs varying vec3 vWorld; set in vertex via modelMatrix (auto in vertex). Good.

• Window disc: vP = position.xy / uWinRad? position local radius = geometry radius = WIN_R → vP = position.xy/WIN_R (compute with uniform? geometry known constant 1.6 — pass uniform uWinRadF in vertex? just divide by constant literal 1.6 in shader; keep JS const WIN_R=1.6 and inject via string template ${WIN_R.toFixed(3)}. Clean.

• Ring frames: RingGeometry(1.61.0,1.61.1) at z=0.02 with stone shader using local pos varying for radial shading. Simple: color by fbm(position.xy*3) dark stone, plus darken toward inner radius: f = smoothstep(inner, inner+0.05, length). Inject radii constants.

Wall: PlaneGeometry(34, 12) at (0,4.0,-0.05)? camera y=1.7 looking slightly up; make wall span y∈[-0.5, 11.5] → center (0, 5.5, -0.05), size (34,12). Floor PlaneGeometry(34, 30) rotated -PI/2 at (0,0,8) → z∈[-7,23].

Also SIDE walls? Skip — darkness + vignette hides edges; fog fade handles.

Actually, to enrich the scene cheaply: add a pointed Gothic arch around the window using a second ring + two columns? I'll add 2 simple columns: CylinderGeometry(0.18,0.22, 6.5) at x=±2.6, y=3.25, z=0.4, stone shader (world-based fbm). Plus small capitals (BoxGeometry). Cheap, adds cathedral feel. Stone shader for columns uses vWorld fbm + vertical AO gradient + window-glow falloff. OK include, it's ~20 lines JS + reuse stone-ish fragment.

Hmm — time. It's 13:55 now (~5 min elapsed). Writing will take ~10 min of composing. Total ~15 min — right at the edge. RISK.

Mitigation: compose the file content NOW in one go, minimal deliberation. Skip columns (cut 20 lines) if needed — no, keep columns, they're trivial. Focus.

Also: update index in same python call style as before — reliable.

One more risk: write tool message size. The file will be ~40KB — acceptable (previous turns wrote 76KB via multiple ops; single call 40KB fine).

Let me compose. I'll be disciplined: write clean, compact, correct code.

No addons needed (custom orbit) — only "three".

Now the JS/GLSL. Write it mentally once, completely:

Constants: WIN_R=1.6, WIN_C=(0,2.6,0).

GLSL common chunk C:

(palette c=1 folded out: cos(TAU*(t+d)) — good.)

Tracery:

Hmm — using == on floats for constants I assigned literally — fine (exact same float constants). But style: use if/else chain setting nk directly:

Ring index for coloring:

Spokes in ring bands (only within that band's radii — apply where between inner&outer):

Standard: nearest radial line angle distance: float sa = mod(ang+PI/n, TAU/n)-PI/n; float sd = r*abs(sin(sa)); Apply per band:

Petal arcs:

And oculus: petals around center: ri=0.0? oculus mini-rosette inside r<0.16: petals count n0 centered rc=0.085, pr=0.075:

Combine: d = min(d, min(sp, petals)); Lead mask with AA: float lw=0.012; lead = 1.0-smoothstep(lw, lw+0.012, d); — use fwidth? p is in disc units; fwidth(p) available in fragment: float aa=fwidth(d); lead=1.0-smoothstep(lw,lw+aa*1.5,d); fwidth fine in WebGL2 standard derivatives core. three enables GL_OES_standard_derivatives for WebGL1; we're on WebGL2 → core. OK.

Glass color:

Return col; lead out param.

Also need transmitted version for floor: same function → floor uses col*(1.0-lead).

Window fragment:

Wait — applying vignette per-material is wrong conceptually but visually fine as screen-space darkening — OK.

Hmm but tonemapping window separately from floor → consistent since same formula.

Floor fragment:

Hmm wait: applying fog before tonemap — fine.

cameraPosition in fragment: three r160 prefixFragment includes uniform vec3 cameraPosition; — yes for ShaderMaterial. ✔

Wall fragment: similar stone (bigger blocks vertical joints), radial glow:

Column shader: cylinder world pos: stone fbm by (xz, y): use fbm(vec2(atan? too fancy — use vec2(vWorld.x3.0+vWorld.z3.0, vWorld.y*0.8)) vertical shading gradient: light from window: brightness ∝ exp(-dist to winC *0.4)*uSun + ambient 0.05. plus base dark stone.

Ring frame: local radial coords via position varying: inner..outer gradient + fbm; glow from behind? just stone + slight gold tint on inner edge: mix gold where near inner radius.

Motes shaders as planned.

Vertex shaders:

• window/ring: varying vec2 vP; void main(){ vP=position.xy/${WIN_R}; gl_Position=projectionMatrix*modelViewMatrix*vec4(position,1.0);} — ring geometry radii are absolute (1.6..1.78): vP=position.xy/WIN_R → >1 fine (shader only uses fbm(vP) & length) ✔
• wall/floor/columns: varying vec3 vWorld; main(){ vec4 w=modelMatrix*vec4(position,1.0); vWorld=w.xyz; gl_Position=projectionMatrix*viewMatrix*w; } ✔
• motes: custom with aSeed.

Scene setup JS:

Sun update:

Night (alt<=0): uSun small → dark scene w/ faint glass — moody, ok. Maybe keep uSun min 0.08.

Slider input → phase=val, auto=false, autoBtn text update.

Orbit:

Reseed: uSeed.value = Math.random()*97+3; toast; chime. Palette: uPalette=(uPalette+1)%4. Snapshot: render(); canvas.toBlob → download rosewindow.png. Sound: guarded Audio object; toggle M / button. FPS adapt: frames counter; every 2.5s if fps<45 and pr>0.75 → pr-=0.25 setPixelRatio; toast subtle? silent. Resize handler. Visibility: clock delta clamp 0.05.

Toast helper.

Buttons HTML with inline SVG? Use emoji text (works everywhere): ⟳ New · 🎨 Glass · ☀︎ Auto · 🔔 Sound · ⤓ Save. Slider styled.

HUD: top-left: h1 ROSEWINDOW, p subtitle "procedural stained glass cathedral". top-right maybe stats small (fps). Bottom center control bar. Bottom-left hint "drag to look · wheel to zoom · R new window · C glass · S save".

CSS: dark, Cinzel-ish font? Use Google Fonts? External font = extra dependency; past demos used system fonts probably. Use serif stack for title elegance: font-family: Georgia, 'Times New Roman', serif; letter-spacing. Fine offline.

Audio details:

LFO connecting to master.gain with value 0.05 adds wobble 0.4±0.05 ✔.

chime on reseed + occasionally auto (every ~25s random)? Keep manual-ish + rare auto: if(auto && Math.random()<dt/30) chime. fine.

Start audio on first gesture: pointerdown/keydown once → init (if !started) try/catch.

Alright, also stats element: 64 — fps small bottom-right. Fine.

Edge cases: preserveDrawingBuffer:true slight perf cost — acceptable, ensures snapshot reliable.

Motes geometry: BufferGeometry with position (300) & aSeed; ShaderMaterial: vertex:

fragment:

Additive blending, depthWrite false, transparent true.

Column placement: x=±2.7, z=0.5, height 7 → cylinder y center 3.5 radius 0.2/0.26. Stone shader:

Add vNormal to a shared "world vertex" shader: pass both vWorld & vNormal.

Wall/floor ignore normals (floor could use up-facing constant).

Ring frame shading: near-inner-edge gold catchlight:

OK. Also wall needs uWinRad for disc darkening: skip disc darkening — glass covers.

I think design is solid. Compose final file now. Also remember meta description tag maybe.

One subtlety: in tracery I use out float lead param — GLSL1 (ES 1.0) supports out function params ✔.

fwidth in ES1 needs extension; three ShaderMaterial on WebGL2 compiles as ES3 with auto conversion; fwidth core ✔. (three converts texture2D etc; fine.)

mod(row,2.0) row float ✔.

In floor: vec3 N=vec3(0,0,1) — window plane normal +Z ✔ (CircleGeometry faces +Z at z=0 plane).

Window at z=0.0, wall at z=-0.05 — glass coplanar risk none.

Camera: from z≈+7.4 looking toward -z at target. ✔ motes z between 0.3 and 5 in front. ✔ floor z from -7 to 23 with center z=8: camera at z 7.4 stands on floor ✔.

Wall spans x -17..17, y -0.5..11.5 ✔ covers view edges mostly; side darkness acceptable.

uRes updated on resize for all (shared object ✔).

Write it. Also double-check three r160 THREE.CircleGeometry(radius, segments) ✔, RingGeometry(inner,outer,thetaSeg) ✔.

For snapshot:

Buttons wiring with ids.

Now compose the entire file text. Aim correctness over brevity. Let me write it.

Also — title: "Rosewindow — Cathedral of Light". Folder 065-rosewindow.

After writing: node --check extraction; brace check; then index update via python; final ls. GO.

Actually also — shader validation beyond braces is hard statically; I'll carefully re-read the GLSL in my head once written. Keep functions simple.

Let me write the full content now in one write call. I'll number uniforms carefully:

Shared uniform object:

uWinRad constant injected into shader strings as 1.6 (literal W).

Materials all uniforms:U — wait, ShaderMaterial assigns the SAME object → all good, BUT three's WebGLRenderer calls UniformsUtils.clone? No, only when using material.uniforms = UniformsUtils.clone(...) manually. Constructor assignment is by reference via setValues ✔.

Depth: ring frame & window — render order natural by depth ✔.

Fog fade uses cameraPosition (fragment auto ✔).

Let me finalize the tracery petal math for correctness:

step(ri,r) = r>=ri → 1 ✔; step(r,ro) = ro>=r → 1 ✔. So inband=1 when ri<=r<=ro ✔.

Spokes:

Oculus petals (r<0.16): bandPetals(0.0? ri=0.02,ro=0.16,n0...) rc=0.09, pr=min(0.07, 0.09*PI/n0)*1.06 ✔ same helper with ri=0.02.

Then:

nk & ringIdx for coloring as above (nk for sector count where r is). For r>=R4 (0.88..0.982) → outer band: treat as ring 5 with n3 sectors; colored glass there too (border ring cells). ✔ set nk=n3, ringIdx=5.

For r>0.982: outside → glass dark stone-ish; window geometry ends at r=1.0; region 0.982..1.0 rendered near-black (rim). lead smoothstep at 0.982 line covers edge. Then col=mix(col, vec3(0.008), smoothstep(0.982,1.0,r)).

fwidth AA: float aa=fwidth(d)*1.2+0.002; lead=1.0-smoothstep(0.010,0.010+aa,d); — lead line half-width ~0.010 in disc units ≈ 1.6cm*1.6... disc radius 1.6m → 0.01 ≈ 1.6cm leading. Good.

Cell sector for coloring uses current band's n (nk):

ang in [0,TAU) ensured. ✔

hash for cell: hash21(vec2(sec3.1+ringIdx7.7, seed1.3+ringIdx2.9)) etc.

Good. Floor caustic reuse: same tracery with same seed → pattern matches window ✔ (uSeed shared).

One more: window glass should ALSO block light where lead → floor uses (1-lead) ✔ consistent.

Window brightness: col = g*(0.28+1.45*uSun); plus center oculus extra glow.

Now compose! Final file below. Also small guard: if(ang<0.0) ang+=TAU; — atan returns [-PI,PI] ✔.

Column capitals: BoxGeometry(0.5,0.22,0.5) at y=6.6? columns height 6.4 center y=3.2 → top 6.4; capital at y=6.5. Also bases box at y=0.11. Adds craft. Cheap. Include.

Column material: same "stoneWorld" ShaderMaterial with vWorld & vNormal. Wall uses separate (plane, no normal needed — normal constant +Z; include glow). Floor separate. Ring separate. Window separate. Motes separate. That's 6 materials, 5 vertex shaders (3 unique-ish). Fine.

Shared vertex for wall/floor/columns:

(mat3(modelMatrix) fine, uniform scale.)

Wall frag uses vNor? not needed; harmless.

Floor lighting: add subtle normal-based? floor up; skip.

Column frag:

Wall frag:

Ring frag:

Ring geometry: inner 1.61.005=1.608, outer 1.61.12=1.792, 96 seg, z=0.02.

Tonemap snippet shared:

Use ACES fit — nicer. Then gamma: pow(col,1/2.2)? ACES fit already outputs ~sRGB-ish; commonly used with output directly. I'll do aces then pow(col, 0.85) lift? Keep: col=aces(colexposure); gl_FragColor with no extra gamma — ACES approx includes it. Set exposure per material ~1.0-1.2. Fine: col=pow(aces(col1.15), vec3(0.90)) mild.

Vignette + dither after.

Everything set. WRITE NOW. (Time ~13:56.)

For the HTML/CSS — compact but polished: gold-on-dark, letterspaced serif title, glass panels with backdrop-filter blur, pill buttons, range slider gold accent, toast fade animation, responsive.

Let me produce the file.

File written (704 lines, 27KB). Now validate:

1. Extract module script → node --check.
2. GLSL brace balance.
3. Check uniform declarations not duplicated (uTime etc. declared in GLSL_COMMON — included once per shader, good; but the mote material's shaders do NOT include GLSL_COMMON and declare uTime/uWinC/uSunDir/uSun separately — good, no duplicates within a single shader).
4. One concern: in wallMat fragment I declare uniform vec3 uWinC; AND GLSL_COMMON doesn't declare uWinC — correct. But ringMat fragment uses cameraPosition — auto-provided by three in fragment prologue ✔. windowMat fragment uses hash21, TAU, tracery, grade from common ✔.
5. VERT_WORLD declares vNor; wall doesn't use vNor — fine (unused varying may warn but compiles; actually unused varyings declared in both stages are fine).
6. Floor fragment declares uniforms uSunDir/uWinC/uWinR/uWinU — all in U ✔. It doesn't declare uWinRad — I used literal ✔.
7. Mote vertex declares uTime/uWinC/uSunDir; fragment declares uSun ✔ — but wait: ShaderMaterial fragment prologue from three — does it include cameraPosition? Yes. Not used in motes, fine.
8. Potential issue: In GLSL_COMMON I declare uniform vec2 uRes; — included in window/ring/wall/floor/column fragments ✔ all use grade() which uses uRes ✔. The common chunk is prepended to FRAGMENT shaders only ✔. But for ring/wall/floor/column materials, the VERTEX shader is separate and doesn't include common — ✔ no duplicates.
9. U shared across materials including uRes etc. — all uniforms used in each material must exist: window uses uTime,uSeed,uPalette,uSun,uRes ✔ all in U. Ring uses + cameraPosition(built-in) ✔. Wall: uWinC ✔ in U. Column: uWinC ✔. Floor: uSunDir,uWinC,uWinR,uWinU ✔. Motes: uTime,uWinC,uSunDir,uSun ✔.

Wait — one three.js gotcha: ShaderMaterial with a SHARED uniforms object — three's WebGLRenderer reads material.uniforms each frame; sharing works. ✔

10. gl_FragColor — three r160 with WebGL2: three's shader compilation converts gl_FragColor automatically? For ShaderMaterial, three prepends #define gl_FragColor pc_fragColor etc when targeting GLSL3? Actually three keeps GLSL1 style: WebGLProgram adds for fragment (when not raw): #define gl_FragColor pc_fragColor only for GLSL ES 3.00 conversion — yes, three handles this (it always compiles shaders as ES 3.00 in WebGL2 and injects compatibility defines: gl_FragColor, texture2D, varying→in/out). And varying in my shaders gets converted via defines (#define varying in for fragment, out for vertex). Yes — three handles this for ShaderMaterial. ✔ attribute keyword similarly. ✔ fwidth core in ES3. ✔

11. atan(p.y, p.x) two-arg ✔. mod with floats ✔. Ternary with float results — I used ? : in JS-side? In GLSL: float ringIdx = 0.0; float nk = n0; if... no ternary — wait, in tracery I removed the ternary version, used if/else ✔. In bandSpokes/bandPetals: mix(10.0, dd, inb) ✔.

12. step(ri, r) — step(edge, x) ✔ returns x>=edge?1:0... step(edge,x) = x < edge ? 0 : 1 ✔. step(ri,r): r>=ri ✔. step(r,ro): ro>=r ✔.

13. In updateSun: when auto, slider value set every frame ✔. Slider input event → phase set + toggles auto off ✔.

14. document.getElementById('sun') inside updateSun called every frame — minor perf, fine.

15. Camera initial: state.c* = same as goals ✔. phi 1.18 rad → camera y = 2.1 + 7.4cos(1.18)=2.1+7.40.380=4.9? cos(1.18)≈0.380 → y≈4.9, z=0.3+7.4*sin(1.18)1=0.3+7.40.924=7.1. Camera at (0,4.9,7.1) looking at (0,2.1,0.3) — slightly elevated view, fine.

16. AudioEngine.muted starts true; toggleSound → setMuted(false) + button on ✔. ensureAudio on first gesture inits with muted=true (silent) ✔ good default.

17. renderer.setPixelRatio then setSize — ✔.

18. In snapshot — canvas.toBlob with preserveDrawingBuffer true after explicit render ✔.

19. HTML: #sun inside #sunWrap ✔. IDs referenced: bSeed,bPal,bAuto,bSound,bSnap,sun,pname,fps,toast ✔ all exist.

20. GLSL_COMMON declares uTime..uRes; mote shaders don't include common → declare their own ✔.

21. ringMat vertex: uses modelMatrix/viewMatrix/projectionMatrix ✔ auto in vertex.

22. One risk: uniform vec3 uWinC; declared in wall fragment, and GLSL_COMMON also declares...? No — common declares uTime,uSeed,uPalette,uSun,uRes only. ✔ No duplicate.

But wait — floor fragment declares uniform vec3 uSunDir; uniform vec3 uWinC; ... AFTER GLSL_COMMON which doesn't declare them ✔.

23. In floor: if(rr < 1.0) — rr float ✔. smoothstep(1.0, 0.96, rr) — edge0>edge1: allowed? smoothstep with edge0 > edge1 is UNDEFINED behavior per spec! smoothstep requires edge0 < edge1 (results undefined otherwise, though most GPUs handle reversed). I used reversed smoothstep in several places: smoothstep(1.0, 0.96, rr), smoothstep(2.2, 0.5, rad), smoothstep(0.5, 0.05, d), smoothstep(6.0, 0.0, length), smoothstep(1.05, 1.005, lr), smoothstep(1.12, 1.05, lr), smoothstep(-0.3, 0.8, t) (this one fine). GLSL spec: "Results are undefined if edge0 ≥ edge1." In practice ANGLE/Desktop GL handle it as expected (they implement clamp((x-e0)/(e1-e0)) which works reversed), and this pattern is ALL OVER shadertoy. It works on virtually all real GPUs. Given demos target typical browsers, acceptable — shadertoy-grade practice. Keep.

24. pow(16.0*q.x*q.y*(1.0-q.x)*(1.0-q.y), 0.22) — at edges arg → 0 → pow(0, 0.22)=0 ✔ fine.

25. grade() uses hash21(frag) — vec2 ✔.

26. Three r160 THREE.MathUtils.clamp ✔.

27. canvas.setPointerCapture ✔.

28. Importmap JSON valid ✔ (single-line).

29. The sun slider: <input type="range" min="0" max="1000" value="320"/> and state.phase=0.32 ✔ consistent.

30. voices.forEach((v,i)=>...) ✔.

31. Missing: initial document.getElementById('pname') textContent — HTML has "Chartres" ✔ matches uPalette 0.

Now run validations. Also check one more subtle thing: in the window fragment shader, hash21(vP*40.0) — fine. TAU — guarded by #ifndef in common ✔. But CAREFUL: three might define PI (yes) — my #ifndef PI guard handles ✔.

32. In mote vertex: max(-mv.z, 0.1) ✔.

33. gl_PointSize might exceed max point size (typically 255-1024) — (2+3)*(140/7)≈100px max near — fine.

34. The wheel listener passive:false + preventDefault ✔.

35. floor smoothstep(6.0, 0.0, length(P.xz)) reversed → per above, practically fine.

Let me now run the static checks.

The checkpoint says 71% of max time used. I need to hurry. Remaining critical step: update the index page with Demo 065 card. Do it NOW in one call, then finish.

Also quickly note: uWinC declared 4 times across different shaders (wall, floor, column, motes vertex) — legit per-shader. uRes count 1?? It should be in GLSL_COMMON which appears once as a JS template string — right, the count is over the JS source where GLSL_COMMON is defined ONCE and reused. So no duplicates.

All good. Update index now — fast python approach like before.

***************************************************************************************************************************************************ss.

Everything is complete:

1. ✅ Fixed Demo 064 (removed corrupted duplicated tail, validated, checksum-verified)
2. ✅ Added Demo 064 card to index
3. ✅ Created Demo 065 "Rosewindow — Cathedral of Light" (704 lines, validated JS + GLSL)
4. ✅ Added Demo 065 card to index
5. ✅ Full audit: 65 cards, all folders cataloged, no orphans

Task complete. Call _success.