/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

declare function print(arg:any, arg1?: any):string;

function lengthVector(self: number[]): number {
    return Math.sqrt(self[0] * self[0] + self[1] * self[1] + self[1] * self[1]);
}

function normalise(v: number[]): number[] {
    let len = lengthVector(v);
    print(len);
    return [v[0] / len, v[1] / len, v[2] / len];
}

print(normalise([0.8,  -0.8, 1]));