krishnax12/watchy-eink-smartwatch

scripts/measure-step-models.cjs

// Raw STEP geometry only: these bounds do not certify viewer transforms or fit.
const fs = require("node:fs");
const path = require("node:path");

function measureMesh(mesh) {
	const min = [Infinity, Infinity, Infinity];
	const max = [-Infinity, -Infinity, -Infinity];
	const vertices = mesh.attributes.position.array;
	for (let i = 0; i < vertices.length; i++) {
		const axis = i % 3;
		min[axis] = Math.min(min[axis], vertices[i]);
		max[axis] = Math.max(max[axis], vertices[i]);
	}
	return { name: mesh.name, min, max };
}

async function main() {
	const occt = await require("occt-import-js")();
	const models = [];
	for (const file of fs
		.readdirSync("assets")
		.filter((file) => file.endsWith(".step"))) {
		const result = occt.ReadStepFile(
			fs.readFileSync(path.join("assets", file)),
			{
				linearUnit: "millimeter",
			},
		);
		if (!result.success) throw new Error(`Cannot parse ${file}`);
		const meshes = result.meshes.map(measureMesh);
		const min = [0, 1, 2].map((axis) =>
			Math.min(...meshes.map((mesh) => mesh.min[axis])),
		);
		const max = [0, 1, 2].map((axis) =>
			Math.max(...meshes.map((mesh) => mesh.max[axis])),
		);
		models.push({
			file,
			min,
			max,
			size: max.map((value, axis) => value - min[axis]),
			meshes,
		});
		console.log(
			file,
			max.map((value, axis) => (value - min[axis]).toFixed(3)).join(" × "),
		);
	}
	fs.writeFileSync(
		"reports/step-model-measurements.json",
		JSON.stringify(models, null, 2),
	);
}

main().catch((error) => {
	console.error(error);
	process.exitCode = 1;
});