@plastichub/osr-cad/lib/geometry/dxf.js

This is a CLI(CommandLineInterface) toolset to convert 3D files, using Solidworks and other software.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const fs = require("fs");
const dxf = require('dxf-parser');
const write_1 = require("@plastichub/fs/write");
function distanceBetweenPoints(p1, p2) {
    return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
}
function arcLength(radius, startAngle, endAngle) {
    return Math.abs(endAngle - startAngle) * radius;
}
function calculateEntityLength(entity) {
    switch (entity.type) {
        //case 'LINE':
        //    return distanceBetweenPoints(entity.start!, entity.end!);
        case 'LWPOLYLINE':
        case 'LINE':
            let length = 0;
            for (let i = 0; i < entity.vertices.length - 1; i++) {
                try {
                    length += distanceBetweenPoints(entity.vertices[i], entity.vertices[i + 1]);
                }
                catch (e) {
                    console.log('error', entity, e);
                }
            }
            return length;
        case 'CIRCLE':
            return 2 * Math.PI * entity.radius;
        case 'ARC':
            return arcLength(entity.radius, entity.startAngle, entity.endAngle);
        default:
            return 0;
    }
}
function calculateTotalDxfEntitiesLength(filePath) {
    const parser = new dxf();
    const dxfData = parser.parseSync(fs.readFileSync(filePath, 'utf-8'));
    const ret = dxfData.entities.reduce((totalLength, entity) => {
        console.log('entity', entity);
        const length = calculateEntityLength(entity);
        return totalLength + length;
    }, 0);
    (0, write_1.sync)(filePath + '.json', JSON.stringify(dxfData, null, 2));
    return ret;
}
const test = () => {
    // Usage example
    const filePath = './tests/dxf/square-200-bore.DXF';
    const totalLength = calculateTotalDxfEntitiesLength(filePath);
    console.log(`Total length of all entities: ${totalLength}`);
};
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