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/*
* 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
};
}]);
}());
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