Vector3d.prototype.pitchAndYawTo = function(position) {
		var dx = this.x - position.x;
		var dy = this.y - position.y;
		var dz = this.z - position.z;
		return {
			pitch: toDegrees(Math.atan2(dz, Math.sqrt(dx * dx + dy * dy))),
			yaw: toDegrees(Math.atan2(dy, dx)) + 180
		}
	}