3dtours
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COLOR TEMP's swatch was Tanner Helland's blackbody fit, so it painted the colour of the LIGHT the number names: 2500K came out orange #ff9f46 while the engine cooled the frame on the same knob. Read off the render of a neutral 128-grey (mean of the painted preview, CCT via McCamy), the two ran opposite ways at every stop: K old swatch swatch CCT picture mean picture CCT 2500 #ff9f46 2384K 115,135,204 47691K (blue) 3200 #ffb87b 3096K 128,141,171 11246K 4000 #ffcea6 3931K 135,141,156 8203K 5500 #ffedde 5414K 144,139,143 6479K (unity) 6500 #fffefa 6322K 148,138,139 6029K 7500 #e6ebff 7730K 149,138,132 5555K 10000 #cadaff 10024K 153,138,128 5180K (warm) So the number is a Kelvin of the scene's light — which is exactly why the engine warms the picture as K rises — and the swatch was the one thing on the ruler that disagreed with the ruler. It is now painted from kelvinToRGB itself, the same gains the render puts on every pixel, on a mid grey, so the band under the knob can never drift from the frame above it. kelvinToHex goes away with it: one Kelvin->colour mapping in the app, not two. Measured after: the swatch's R-B tracks the render's own cast at every stop (-82 vs -89.8 at 2500K, +23 vs +24.0 at 10000K), 5500K is flat #808080 — the engine's unity point — and 3200K sits cool / 7500K warm either side of it. temp-swatch-test.cjs (scratchpad): 33 PASS / 0 FAIL.
RecipesCam
RecipesCam is a camera and photo-editing app built around recipes — reusable
looks that carry a film simulation plus a full set of adjustments. You shoot or
open a photo, dial in a look, and keep it as a recipe you can apply again, share
as a .recipe file, or save to your account.
It ships twice from one repository: a React Native (Expo) app for iOS and
Android, and a self-contained web build under docker/ that runs the same
render pipeline in the browser.
What it does
- Shoot with a recipe applied. Live viewfinder, GPS-tagged captures, and the recipe baked into the saved file.
- Film simulations. Built-in looks — PROVIPES, VELVIPES, CLASSIC CHRIPES, CLASSIC NEGIPES, ASTIPES, ETERNIPES, ACRIPES, B&W HIGH CONTRAST and the LC STREETLIFE pair — each with its own grain and tone curve.
- The full adjustment set. Exposure, contrast, highlights and shadows, saturation, colour temperature, clarity, grain, and an HSL mixer with a colour picker that samples straight off the photo.
- Geometry. Crop to a fixed ratio or free-form, quarter turns, and a straighten ruler, plus printed frames (classic border, retro instant, wall frame portrait/landscape).
- Finishing. Watermark and GPS stamp, EXIF carried through the export, JPEG written with a proper 300 DPI JFIF header.
- On-device upscaling. A Real-ESRGAN pass runs locally when an export asks for more pixels than the source has — no server sees the photo.
- Recipes. Save, favourite, export and import
.recipefiles; the web build keeps them in your account, the phone build also keeps them on device.
The two builds
| Build | Where | Stack |
|---|---|---|
| iOS / Android | repo root | Expo + React Native, @shopify/react-native-skia for the render pipeline, NativeWind for styling |
| Web | docker/ |
Vite + React, CanvasKit (canvaskit-wasm) for the same pipeline, Fastify + SQLite API for accounts and recipes |
The render engine is shared by design: the web build compiles the app's own
src/utils/* and type definitions unchanged, with @shopify/react-native-skia
aliased to a CanvasKit shim (docker/frontend/src/engine/skiaShim.ts). A look
looks the same on both because it is the same code.
Running the web build
cd docker
cp .env.example .env
docker compose up -d --build
# → http://localhost:8090
Photos never leave the browser: grading, framing, watermarking and JPEG
encoding all run in the visitor's tab; the API only stores accounts and recipe
JSON. See docker/README.md for the layout and the proxy setup.
Running the app
npm install
npx expo start # Expo Go / dev client
npx expo run:android # or run:ios for a native build
Repository layout
App.tsx, src/ the Expo app: screens, tool rail, viewfinder, shaders
docker/ the web build (frontend + API + compose file)
frontend/shared/ vendored copies of the app's types and utils
frontend/src/engine/ CanvasKit shim, export engine, super-resolution
docs/ privacy policy
THIRD_PARTY_NOTICES.md licences of the bundled fonts, models and libraries
Licence
See LICENSE and THIRD_PARTY_NOTICES.md.