A library for measuring STL meshes. Point it at a file and it returns volume, surface area, bounding box, center of mass, triangle count and whether the mesh is watertight. It runs in the browser as happily as in Node, which makes it useful for 3D printing tools that want to quote a price before anything is uploaded to a server.

Features

• Parses both binary and ASCII STL with a hand-written parser and no dependencies
• Volume, surface area, bounding box, center of mass, triangle count and watertightness
• Optional weight estimate from a density and a unit scale
• Accepts almost any input: ArrayBuffer, typed arrays, Blob or File, streams, or a Node file path
• Flags non-watertight or degenerate geometry through a warnings array instead of failing
• Optional off-main-thread worker, so a large mesh does not block the UI

Install

npm install stl-metrics

import { parseStl } from "stl-metrics";

const metrics = await parseStl(file, { worker: true, density: 1.24, unitScale: "mm" });
console.log(metrics.volume, metrics.isWatertight, metrics.weight);

Links

Source on GitHub, package on npm.