noisedestroyers
7d6d5c232e
Generator - Depth & exposure dynamics: per-track chamber depth (z) + event age drive opacity, bubble size and defocus (depthFactors); depth/aging dials. - Palette abstraction (src/render/palette.js) — one registry entry per "feel": mono, charge, beta, kind, kindlife, kindrise, lifecycle, psychedelic, cyanotype, magentarise. Per-track ink + per-bubble bubbleInk hooks. - Global colour controls: saturation, hue shift; paper toning (cream/sepia/ selenium/cool/olive/neutral + brightness + gas-glow), bubble edge softness, iridescent disk (spectral sunburst), chromatic halo. Ink blend chosen by ground luminance so light-on-dark chemistries composite correctly. - Tracks carry charge q; bubbles carry lifecycle position + local beta. - All effects in raster + layered SVG + CMYK/OCG PDF; B&W remains the default. Tooling & art - tools/find-semicircle.mjs; render-svg/pdf --seed mode + k=v overrides. - Curated vector SVG sets under output/ with browsable index.html. Repo hygiene - .gitignore: stop tracking generated rasters/PDFs (reproducible from seeds), the reference image, and a stray db; keep curated SVGs + code + docs. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
84 lines
4.5 KiB
Markdown
84 lines
4.5 KiB
Markdown
# Bubble Chamber
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A seeded, parametric generator of imaginary particle-physics plates — the
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black-and-white "bubble chamber" photographs of mid-century high-energy physics —
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built for large-format art print. One seed → one fully-determined image, rendered
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either as a worn photographic plate or as clean, layered vector for print.
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## How the images are generated
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Everything derives deterministically from a **seed** string: the seed is hashed
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(`cyrb53`) to seed a chain of salted PRNGs (`mulberry32`) that drive a small
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physics model, so the same seed always yields the same plate. Charged particles
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are launched from interaction **vertices** and integrated step-by-step through a
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uniform magnetic field — curving with radius `r = p/(qB)` and bleeding momentum to
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a simplified Bethe–Bloch energy loss, so slow particles tighten into inward
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spirals. The velocity **β** is tracked along every path and sets both how densely
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**bubbles** nucleate (`∝ 1/β²`) and how fat they are. Low-energy electrons
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knocked loose along the way (**δ-rays**) are drawn as tight logarithmic spirals;
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neutral particles leave **V-decays**; stiff **cosmic rays** and gentle
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**sweepers** cross the frame; a pressure **shock disk**, faint **chamber-optics**
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lines, and **emulsion damage** (scratches, dust, water rings, stains) complete the
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scene. This pure geometric description — the **scene model** — is renderer-agnostic
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and handed to independent renderers: a **photographic raster** compositor that
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layers soft blooming bubbles, halation, film grain, tonal mottle, vignette and
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plate damage for the worn-archival look; and a **vector renderer** that emits the
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identical geometry as **layered SVG** and **CMYK PDF (with OCG layers)** for the
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print shop. Because the seed fixes every choice, an inspiration thumbnail and its
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print master are the same image at different sizes.
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## Colour, palettes & effects
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Black-and-white is the default; colour is an optional, seeded **palette** layer
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(`src/render/palette.js`) applied over the same geometry. Shipped feels:
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- **mono** (B&W), **charge** (duotone by charge sign), **β** (velocity → spectral)
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- **kind** (one hue per particle type), **kindlife** / **kindrise** (type sets the
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hue, lifecycle sets the *intensity* — fading to, or rising toward, the death)
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- **lifecycle** (hue across birth→death), **psychedelic** (hue cycling along trails)
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- **cyanotype** (a full chemistry — blueprint ground + pale ink), **magentarise**
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(a restrained magenta-family example with a burnt-orange disk)
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Orthogonal global controls: **paper tone** (cream/sepia/selenium/cool/olive/neutral
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toners + brightness + gas-glow), **saturation**, **hue shift**, **depth/exposure**
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(per-trail opacity, size & defocus from chamber depth + event age), **bubble edge
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softness**, **iridescent disk** (spectral sunburst), and **chromatic halo** (a
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hue-shifted aura around trails). Adding a new "feel" is one entry in the registry.
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## Quick start
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```bash
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# interactive: open the single self-contained file in a browser
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open bubble_chamber.html # type a seed, hit "Derive all params from seed", tweak sliders
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# dev build (modular src/ → portable single file)
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node build.mjs
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# browse random plates, pick by seed, render print masters
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tools/inspire.sh 24 600 # → output/inspiration/index.html
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tools/render.sh LAMBDA-2648 # → output/masters/ (SVG + CMYK PDF + hi-res PNG)
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node tools/render-svg.mjs --seed LAMBDA-2648 out.svg 6000 diskSoften=1.5
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```
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## Project layout
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- `src/` — modular source: `scene/` (the deterministic model), `render/` (canvas /
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svg / pdf), `ui/`, `rng.js`, `main.js`.
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- `bubble_chamber.html` — built, portable single-file app (live sliders + export).
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- `tools/` — headless render helpers, the inspiration randomizer, CLI renderers.
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- `output/` — `inspiration/` contact sheets, `iterations*/` curated SVG sets (with
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browsable `index.html`), and `masters/` print files. Raster PNGs and print
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masters are **git-ignored** (large and fully reproducible from their seeds).
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- **[DESIGN.md](DESIGN.md)** — architecture & physics decisions.
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- **[PRINT.md](PRINT.md)** — large-format strategy (vector + texture layers, SVG/PDF layers, sizes/DPI).
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- **[roadmap.md](roadmap.md)** — where the project is going, artistically and technically.
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## Aesthetic
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Faithful black-and-white photographic-positive by default (dark ink on milky
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paper), with a "negative plate" variant and an optional colour-palette layer.
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Vector-first for print; the seed/hash makes any preview reproducible at any
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resolution.
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