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Merge pull request #2727 from nasa/swg-randomness

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Adds customizable randomness factor to sine wave generator
This commit is contained in:
Shefali Joshi 2020-03-20 10:25:17 -07:00 committed by GitHub
commit 459b2060a5
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3 changed files with 25 additions and 10 deletions
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4
example/generator/GeneratorProvider.js
View File

@ -31,6 +31,7 @@ define([
period: 10,
offset: 0,
dataRateInHz: 1,
randomness: 0,
phase: 0
};
@ -52,7 +53,8 @@ define([
'period',
'offset',
'dataRateInHz',
'phase'
'phase',
'randomness'
];
request = request || {};

17
example/generator/generatorWorker.js
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@ -65,8 +65,8 @@
name: data.name,
utc: nextStep,
yesterday: nextStep - 60*60*24*1000,
sin: sin(nextStep, data.period, data.amplitude, data.offset, data.phase),
cos: cos(nextStep, data.period, data.amplitude, data.offset, data.phase)
sin: sin(nextStep, data.period, data.amplitude, data.offset, data.phase, data.randomness),
cos: cos(nextStep, data.period, data.amplitude, data.offset, data.phase, data.randomness)
}
});
nextStep += step;
@ -99,6 +99,7 @@
var offset = request.offset;
var dataRateInHz = request.dataRateInHz;
var phase = request.phase;
var randomness = request.randomness;
var step = 1000 / dataRateInHz;
var nextStep = start - (start % step) + step;
@ -110,8 +111,8 @@
name: request.name,
utc: nextStep,
yesterday: nextStep - 60*60*24*1000,
sin: sin(nextStep, period, amplitude, offset, phase),
cos: cos(nextStep, period, amplitude, offset, phase)
sin: sin(nextStep, period, amplitude, offset, phase, randomness),
cos: cos(nextStep, period, amplitude, offset, phase, randomness)
});
}
self.postMessage({
@ -120,14 +121,14 @@
});
}
function cos(timestamp, period, amplitude, offset, phase) {
function cos(timestamp, period, amplitude, offset, phase, randomness) {
return amplitude *
Math.cos(phase + (timestamp / period / 1000 * Math.PI * 2)) + offset;
Math.cos(phase + (timestamp / period / 1000 * Math.PI * 2)) + (amplitude * Math.random() * randomness) + offset;
}
function sin(timestamp, period, amplitude, offset, phase) {
function sin(timestamp, period, amplitude, offset, phase, randomness) {
return amplitude *
Math.sin(phase + (timestamp / period / 1000 * Math.PI * 2)) + offset;
Math.sin(phase + (timestamp / period / 1000 * Math.PI * 2)) + (amplitude * Math.random() * randomness) + offset;
}
function sendError(error, message) {

14
example/generator/plugin.js
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@ -122,6 +122,17 @@ define([
"telemetry",
"phase"
]
},
{
name: "Randomness",
control: "numberfield",
cssClass: "l-input-sm l-numeric",
key: "randomness",
required: true,
property: [
"telemetry",
"randomness"
]
}
],
initialize: function (object) {
@ -130,7 +141,8 @@ define([
amplitude: 1,
offset: 0,
dataRateInHz: 1,
phase: 0
phase: 0,
randomness: 0
};
}
});