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2 is magic.

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Howard Stearns 2016-02-10 12:17:58 -08:00
parent 4241f4b305
commit 31d72ffb8d
1 changed files with 4 additions and 1 deletions
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5
examples/libraries/virtualBaton.js
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@ -29,7 +29,10 @@ function virtualBatonf(options) {
// Answer averages (number +/- variability). Avoids having everyone act in lockstep. // Answer averages (number +/- variability). Avoids having everyone act in lockstep.
function randomize(number, variability) { function randomize(number, variability) {
var allowedDeviation = number * variability; var allowedDeviation = number * variability;
return number - allowedDeviation + (Math.random() * 2 * allowedDeviation); 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;
} }
// Allow testing outside in a harness outside of High Fidelity. // Allow testing outside in a harness outside of High Fidelity.
// See sourceCodeSandbox/tests/mocha/test/testVirtualBaton.js // See sourceCodeSandbox/tests/mocha/test/testVirtualBaton.js