How to use the makerjs.paths function in makerjs

/// 
var makerjs = require('makerjs');
var arc = makerjs.paths.Arc;
var line = makerjs.paths.Line;
var point = makerjs.point;
var PolygonStackBoxInside = (function () {
    function PolygonStackBoxInside(angle, radius, holeRadius, rimThickness) {
        var rim = Math.min(rimThickness, holeRadius);
        var a2 = angle * 2;
        var innerFilletCenter = point.rotate([radius + 2 * holeRadius + rim, 0], 90 + angle, [radius, 0]);
        var innerFilletTop = new arc(innerFilletCenter, holeRadius, 270 + angle, angle);
        var innerFilletTopPoints = point.fromArc(innerFilletTop);
        var innerFilletBottomPoint = [innerFilletTopPoints[1][0], -innerFilletTopPoints[1][1]];
        this.paths = {
            innerFilletTop: innerFilletTop,
            innerFilletBottom: makerjs.path.mirror(innerFilletTop, false, true),
            innerLine: new line(innerFilletTopPoints[1], point.rotate(innerFilletBottomPoint, a2, [0, 0])),
            innerFillet: new arc([radius, 0], holeRadius + rim, 90 + angle, 270 - angle)
        };
    }

function starboxInner(width, height, holeRadius, rimThickness) {
        var mm = makerjs.model;
        var corner = new starboxCorner(holeRadius, rimThickness);
        this.models = {
            bottomLeft: corner,
            bottomRight: mm.move(mm.mirror(corner, true, false), [width, 0]),
            topLeft: mm.move(mm.mirror(corner, false, true), [0, height]),
            topRight: mm.move(mm.mirror(corner, true, true), [width, height])
        };
        var line = makerjs.paths.Line;
        var rim = Math.min(rimThickness, holeRadius);
        var d = 2 * holeRadius + rim;
        this.paths = {
            bottom: new line([d, -holeRadius], [width - d, -holeRadius]),
            top: new line([d, height + holeRadius], [width - d, height + holeRadius]),
            left: new line([-holeRadius, d], [-holeRadius, height - d]),
            right: new line([width + holeRadius, d], [width + holeRadius, height - d])
        };
    }
    return starboxInner;

function Spines(spines, innerRadius, outerRadius) {
    this.paths = {};
    if (innerRadius === outerRadius) innerRadius = 0;
    for (var i = 1; i < spines; i++) {
        var a = (180 / spines) * i;
        var line = new makerjs.paths.Line([innerRadius, 0], [outerRadius, 0]);
        makerjs.path.rotate(line, a);
        this.paths["spine" + i] = line;
    }
}

function Wireframe(columns, column, extra, radius, split) {
    this.paths = {
        bottom: new makerjs.paths.Line([-radius, 0], [radius, 0])
    };
    this.models = {
        bows: new Bows(columns, column),
        spines: new Spines(columns + (+extra), columns % 2 ? column / 2 : column, radius)
    };
    if (split && columns > 3 && columns % 2 === 0) {
        this.paths.split = new makerjs.paths.Line([0, 0], [0, column]);
    }
}

function TongueAndGroove(count, tongueWidth, grooveWidth, grooveDepth, dogbone) {

  //Tongue and grooves for a box joint
  var groove = new m.models.Dogbone(grooveWidth, grooveDepth, dogbone, 0, true);

  groove.paths.leftTongue = new m.paths.Line([-tongueWidth / 2, 0], [0, 0]);
  groove.paths.rightTongue = new m.paths.Line([grooveWidth, 0], [grooveWidth + tongueWidth / 2, 0]);

  this.models = {
    tng: m.layout.cloneToRow(groove, count)
  };

  this.origin = [tongueWidth / 2, 0];
}

function Heart(r, a2) {

    var a = a2 / 2;

    var a_radians = makerjs.angle.toRadians(a);

    var x = Math.cos(a_radians) * r;
    var y = Math.sin(a_radians) * r;

    var z = makerjs.solvers.solveTriangleASA(90, 2 * r, 90 - a);

    this.paths = {
        arc1: new makerjs.paths.Arc([x , 0], r, -a, 180 - a),
        line1: new makerjs.paths.Line([x * 2, -y], [0, -z + y])
    };

    this.paths.arc2 = makerjs.path.mirror(this.paths.arc1, true, false);
    this.paths.line2 = makerjs.path.mirror(this.paths.line1, true, false);
}

function TongueAndGroove(count, tongueWidth, grooveWidth, grooveDepth, dogbone) {

  //Tongue and grooves for a box joint
  var groove = new m.models.Dogbone(grooveWidth, grooveDepth, dogbone, 0, true);

  groove.paths.leftTongue = new m.paths.Line([-tongueWidth / 2, 0], [0, 0]);
  groove.paths.rightTongue = new m.paths.Line([grooveWidth, 0], [grooveWidth + tongueWidth / 2, 0]);

  this.models = {
    tng: m.layout.cloneToRow(groove, count)
  };

  this.origin = [tongueWidth / 2, 0];
}

function TextOnPath(font, fontSize, topText, topSpan, bottomText, bottomSpan, baseline, contain, rotate, showPath) {

    var topTextModel = new makerjs.models.Text(font, topText, fontSize);
    var bottomTextModel = new makerjs.models.Text(font, bottomText, fontSize);

    var topArc = new makerjs.paths.Arc([0, 0], 100, 90 - topSpan / 2, 90 + topSpan / 2);
    var bottomArc = new makerjs.paths.Arc([0, 0], 100, 270 - bottomSpan / 2, 270 + bottomSpan / 2);

    makerjs.layout.childrenOnPath(topTextModel, topArc, baseline, true, contain, rotate);
    makerjs.layout.childrenOnPath(bottomTextModel, bottomArc, baseline, false, contain, rotate);

    this.models = {
        topText: topTextModel,
        bottomText: bottomTextModel
    };

    if (showPath) {
        this.paths = {
            topArc: topArc,
            bottomArc: bottomArc
        };
    }

function Heart(r, a2) {

    var a = a2 / 2;

    var a_radians = makerjs.angle.toRadians(a);

    var x = Math.cos(a_radians) * r;
    var y = Math.sin(a_radians) * r;

    var z = makerjs.solvers.solveTriangleASA(90, 2 * r, 90 - a);

    this.paths = {
        arc1: new makerjs.paths.Arc([x , 0], r, -a, 180 - a),
        line1: new makerjs.paths.Line([x * 2, -y], [0, -z + y])
    };

    this.paths.arc2 = makerjs.path.mirror(this.paths.arc1, true, false);
    this.paths.line2 = makerjs.path.mirror(this.paths.line1, true, false);
}

function monotext() {
	var mv = makerjs.model.move;
	var arc = makerjs.paths.Arc;
	var line = makerjs.paths.Line;
	
	var u = 50;
	var u2 = u * 2;
	var u3 = u * 3;
	var u4 = u * 4;
	var up = u / 3;
	var c1 = [u, u];
	var c2 = [u, u3];
	var pne = [u2, u4];
	var pnw = [0, u4];
	var k = u2 + u * .75;
	var gap = 15;
	var gc = [gap, u2];
	var gc2 = [u2 - gap, u2];
	var sa = 10;