constructor() {

			// for Three.js
			this.threeVector3s = [];
			this.threeMatrix4s = [];
			this.threeQuaternions = [];
			this.threeEulers = []; // for Ammo.js

			this.transforms = [];
			this.quaternions = [];
			this.vector3s = [];

		}
This manager's responsibilies are

1. manage Ammo.js and Three.js object resources and
   improve the performance and the memory consumption by
   reusing objects.

2. provide simple Ammo object operations.