Scrap Tracer

Turn a phone photo of a laser-cut scrap piece into a 1:1 DXF/SVG outline, so you can check in RDWorks (or LightBurn/Inkscape) whether your design fits on it. Built for Makerspace Delft.

Use

1. Photograph the piece from straight above, on a contrasting surface, with something of known length visible.
2. Load the photo, click Measure, click both ends of the known length, and enter it in mm.
3. Check the green outline. If needed, click the piece (this also tells the app whether it is darker or lighter than the background), adjust the threshold, or draw the outline by hand.
4. Set the safety margin (default −2 mm shrinks the usable area a little).
5. Download DXF and import it in your laser software at 1:1, in mm.

Develop

npm install
npm run dev      # local dev server
npm test         # unit tests (Vitest, OpenCV runs headless in Node)
npm run check    # type check
npm run build    # static build in dist/

Deploy (Cloudflare Pages)

Build command npm run build, output directory dist. No server or environment variables needed.