ArMarkerControls id output NaN instead of a number

[kalwalt]

Note: ArMarkerControls is a dervied class from ArBaseControls
This happens because i implemented the code in this way

AR.js-threejs/src/ArBaseControls.ts

Lines 3 to 14 in 9c8e08b

	export class ArBaseControls extends EventDispatcher implements IArBaseControls {
	static id: number;
	private _id;
	protected object3d: Object3D;
	/**
	* THe ArBaseControls constructor, you need to pass a Theee.js Object3d to it.
	* @param object3d the Threejs Object3D to pass.
	*/
	constructor(object3d: Object3D) {
	super()
	this._id = ArBaseControls.id++;

original AR.js code here:

const ArBaseControls = function (object3d) {
  this.id = ArBaseControls.id++;


  this.object3d = object3d;
  this.object3d.matrixAutoUpdate = false;
  this.object3d.visible = false;


  // Events to honor
  // this.dispatchEvent({ type: 'becameVisible' })
  // this.dispatchEvent({ type: 'markerVisible' })	// replace markerFound
  // this.dispatchEvent({ type: 'becameUnVisible' })
};

ArBaseControls.id = 0;

https://github.com/AR-js-org/AR.js/blob/be7c9083df5a651c2ab978ddd7c1a33409c4d40b/three.js/src/threex/threex-arbasecontrols.js#L3-L16
I think this is a bad idea. The _id (should be re-named id) should simply be incremented and not added by the static id property. I will fix this.