dxf-writer/src/Arc.js

Dead simple 2D DXF writer

const DatabaseObject = require("./DatabaseObject");

class Arc extends DatabaseObject {
    /**
     * @param {number} x - Center x
     * @param {number} y - Center y
     * @param {number} r - radius
     * @param {number} startAngle - degree
     * @param {number} endAngle - degree
     */
    constructor(x, y, r, startAngle, endAngle) {
        super(["AcDbEntity", "AcDbCircle"]);
        this.x = x;
        this.y = y;
        this.r = r;
        this.startAngle = startAngle;
        this.endAngle = endAngle;
    }

    tags(manager) {
        //https://www.autodesk.com/techpubs/autocad/acadr14/dxf/line_al_u05_c.htm
        manager.push(0, "ARC");
        super.tags(manager);
        manager.push(8, this.layer.name);
        manager.point(this.x, this.y);
        manager.push(40, this.r);
        manager.push(100, "AcDbArc");
        manager.push(50, this.startAngle);
        manager.push(51, this.endAngle);
    }
}

module.exports = Arc;