constructor( mesh, world, params, manager ) {

			this.mesh = mesh;
			this.world = world;
			this.params = params;
			this.manager = manager;
			this.body = null;
			this.bone = null;
			this.boneOffsetForm = null;
			this.boneOffsetFormInverse = null;

			this._init();

		}
@param {THREE.SkinnedMesh} mesh
@param {Ammo.btDiscreteDynamicsWorld} world
@param {Object} params
@param {ResourceManager} manager