14514f5e3Sopenharmony_ci/*
24514f5e3Sopenharmony_ci * Copyright (c) 2023 Huawei Device Co., Ltd.
34514f5e3Sopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License");
44514f5e3Sopenharmony_ci * you may not use this file except in compliance with the License.
54514f5e3Sopenharmony_ci * You may obtain a copy of the License at
64514f5e3Sopenharmony_ci *
74514f5e3Sopenharmony_ci *     http://www.apache.org/licenses/LICENSE-2.0
84514f5e3Sopenharmony_ci *
94514f5e3Sopenharmony_ci * Unless required by applicable law or agreed to in writing, software
104514f5e3Sopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS,
114514f5e3Sopenharmony_ci * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
124514f5e3Sopenharmony_ci * See the License for the specific language governing permissions and
134514f5e3Sopenharmony_ci * limitations under the License.
144514f5e3Sopenharmony_ci */
154514f5e3Sopenharmony_ci
164514f5e3Sopenharmony_cideclare function print(arg:any, arg1?: any):string;
174514f5e3Sopenharmony_ci
184514f5e3Sopenharmony_cifunction lengthVector(self: number[]): number {
194514f5e3Sopenharmony_ci    return Math.sqrt(self[0] * self[0] + self[1] * self[1] + self[1] * self[1]);
204514f5e3Sopenharmony_ci}
214514f5e3Sopenharmony_ci
224514f5e3Sopenharmony_cifunction normalise(v: number[]): number[] {
234514f5e3Sopenharmony_ci    let len = lengthVector(v);
244514f5e3Sopenharmony_ci    print(len);
254514f5e3Sopenharmony_ci    return [v[0] / len, v[1] / len, v[2] / len];
264514f5e3Sopenharmony_ci}
274514f5e3Sopenharmony_ci
284514f5e3Sopenharmony_ciprint(normalise([0.8,  -0.8, 1]));