Depth - Simple 3D Cube

//@includepath "~/Documents/;%USERPROFILE%Documents"; // eslint-disable-line
//@include "basiljs/bundle/basil.js"; // eslint-disable-line
// based on this flash tutorial
//  Scripting 3D in Flash
//  by senocular
// https://www.kirupa.com/developer/actionscript/3dindex.htm
//
//  TODO: expolore the tutorial even more (e.g. camera)
//
var pw = 200; // for easier handling
var ph = 200; // for easier handling
// see https://en.wikipedia.org/wiki/Focal_length
var focalLength = 300;

/**
 * creates a 3D point
 * @param  {Number} x the x location
 * @param  {Number} y the y location
 * @param  {Number} z the z location
 * @return {Object}   an Object with {x:Nmber, y:Number, z:Number}
 */
var point = function(x, y, z) {
  var point = {};
  point.x = x;
  point.y = y;
  point.z = z;
  return point;
};
/**
 * Converts a 3D point Object to screen coordiantes
 * @param  {Object} pointIn3D an Object created by the point function
 * @return {Object} an Object with {x:Number, y:Number}
 */
var toScreen = function(pointIn3D) {
  var pointIn2D = {};
  var scaleRatio = focalLength / (focalLength + pointIn3D.z);
  pointIn2D.x = pointIn3D.x * scaleRatio;
  pointIn2D.y = pointIn3D.y * scaleRatio;
  return pointIn2D;
};

function draw() {
  b.clear(b.doc()); // clear the current document
  b.units(b.MM); // we want to print. use MM instead of default pixels
  var doc = b.doc(); // a reference to the current document
  // set some preferneces of the document for better handling
  doc.documentPreferences.properties = {
    pageWidth: pw,
    pageHeight: ph
  }; // set the page size
  doc.viewPreferences.rulerOrigin = RulerOrigin.SPREAD_ORIGIN; // upper left corner
  // ----------
  // main code goes here
  // define some 3D points
  points3D = [
    point(-50, -50, -100),
    point(50, -50, -100),
    point(50, -50, 100),
    point(-50, -50, 100),
    point(-50, 50, -100),
    point(50, 50, -100),
    point(50, 50, 100),
    point(-50, 50, 100)
  ];

  var points2D = []; // will hold the 2D points
  // convert them from 3D to 2D
  for (var i = 0; i < points3D.length; i++) {
    p = points3D[i];
    points2D[i] = toScreen(p);
  }
  b.pushMatrix(); // push the matrix
  b.translate(b.width / 2, b.height / 2); // to the center of the screen
  // draw the top plane. Could also be a polygon
  b.line(points2D[0].x, points2D[0].y, points2D[1].x, points2D[1].y);
  b.line(points2D[1].x, points2D[1].y, points2D[2].x, points2D[2].y);
  b.line(points2D[2].x, points2D[2].y, points2D[3].x, points2D[3].y);
  b.line(points2D[3].x, points2D[3].y, points2D[0].x, points2D[0].y);
  // draw the bottom plane
  b.line(points2D[4].x, points2D[4].y, points2D[5].x, points2D[5].y);
  b.line(points2D[5].x, points2D[5].y, points2D[6].x, points2D[6].y);
  b.line(points2D[6].x, points2D[6].y, points2D[7].x, points2D[7].y);
  b.line(points2D[7].x, points2D[7].y, points2D[4].x, points2D[4].y);
  // // connecting bottom and top planes
  b.line(points2D[0].x, points2D[0].y, points2D[4].x, points2D[4].y);
  b.line(points2D[1].x, points2D[1].y, points2D[5].x, points2D[5].y);
  b.line(points2D[2].x, points2D[2].y, points2D[6].x, points2D[6].y);
  b.line(points2D[3].x, points2D[3].y, points2D[7].x, points2D[7].y);
  b.popMatrix();// reset the matrix
  // ----------
  var fname = File($.fileName).parent.fsName + '/' + ($.fileName.split('/')[$.fileName.split('/').length - 1]).split('.')[0] + '.indd';
  // b.println(fname);
  doc.save(fname, false, 'basil', true);
  b.savePNG('out.png');
}
b.go();