| /* |
| * Copyright 2014,2015 Open Networking Laboratory |
| * |
| * 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. |
| */ |
| |
| /* |
| ONOS GUI -- Random -- Encapsulated randomness |
| */ |
| (function () { |
| 'use strict'; |
| |
| var $log, fs; |
| |
| var halfRoot2 = 0.7071; |
| |
| // given some value, s, returns an integer between -s/2 and s/2 |
| // e.g. s = 100; result in the range [-50..50) |
| function spread(s) { |
| return Math.floor((Math.random() * s) - s / 2); |
| } |
| |
| // for a given dimension, d, choose a random value somewhere between |
| // 0 and d where the value is within (d / (2 * sqrt(2))) of d/2. |
| function randDim(d) { |
| return d / 2 + spread(d * halfRoot2); |
| } |
| |
| angular.module('onosUtil') |
| .factory('RandomService', ['$log', 'FnService', |
| |
| function (_$log_, _fs_) { |
| $log = _$log_; |
| fs = _fs_; |
| |
| return { |
| spread: spread, |
| randDim: randDim |
| }; |
| }]); |
| }()); |