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Make randomize clearer.

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This commit is contained in:
Howard Stearns 2016-02-10 12:53:05 -08:00
parent 31d72ffb8d
commit 989192e9fd
1 changed files with 5 additions and 5 deletions
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10
examples/libraries/virtualBaton.js
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@ -28,11 +28,11 @@
function virtualBatonf(options) {
// Answer averages (number +/- variability). Avoids having everyone act in lockstep.
function randomize(number, variability) {
var allowedDeviation = number * variability;
var theNumberThatIsTwice = 2;
// random() is (0, 1], averages 0.5. The average of twice that is 1.
var randomDeviation = Math.random() * theNumberThatIsTwice * allowedDeviation;
return number - allowedDeviation + randomDeviation;
var allowedDeviation = number * variability; // one side of the deviation range
var allowedDeviationRange = allowedDeviation * 2; // total range for +/- deviation
var randomDeviation = Math.random() * allowedDeviationRange;
var result = number - allowedDeviation + randomDeviation;
return result;
}
// Allow testing outside in a harness outside of High Fidelity.
// See sourceCodeSandbox/tests/mocha/test/testVirtualBaton.js