constructor( start = new Vector3( 0, 0, 0 ), end = new Vector3( 0, 1, 0 ), radius = 1 ) {

		/**
		 * The start vector.
		 *
		 * @type {Vector3}
		 */
		this.start = start;

		/**
		 * The end vector.
		 *
		 * @type {Vector3}
		 */
		this.end = end;

		/**
		 * The capsule's radius.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.radius = radius;

	}
Constructs a new capsule.

@param {Vector3} [start] - The start vector.
@param {Vector3} [end] - The end vector.
@param {number} [radius=1] - The capsule's radius.