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/* globals Ziggurat, Poisson */ |
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/** |
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util |
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Utility service with misc. functions. |
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@namespace Services |
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*/ |
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'use strict'; |
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angular |
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.module('game') |
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.service('util', ['prettyNumberFilter', |
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'$sce', |
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'data', |
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function(prettyNumber, $sce, data) { |
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this.gaussian = new Ziggurat(); |
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this.poisson = new Poisson(); |
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/* Return the HTML representation of an element, or the element itself |
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if it doesn't have one */ |
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this.getHTML = function(resource) { |
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let html = data.html[resource]; |
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if (typeof html === 'undefined') { |
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html = data.resources[resource].html; |
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} |
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if (typeof html === 'undefined') { |
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return resource; |
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} |
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return html; |
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}; |
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this.prettifyNumber = function(number) { |
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if (typeof number === 'undefined' || number === null) { |
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return null; |
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} |
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if (number === '') { |
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return ''; |
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} |
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if (number === Infinity) { |
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return '∞'; |
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} |
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if (number > 1e6) { |
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// Very ugly way to extract the mantisa and exponent from an exponential string |
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let exponential = number.toPrecision(6).split('e'); |
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let exponent = parseFloat(exponential[1].split('+')[1]); |
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// And it is displayed with superscript |
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return Number.parseFloat(exponential[0]).toFixed(4) + |
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' × 10<sup>' + |
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this.prettifyNumber(exponent) + |
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'</sup>'; |
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} |
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// we use a regex to remove trailing zeros, plus . (if necessary) |
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return prettyNumber(number, 4); |
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}; |
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this.randomDraw = function(number, p) { |
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let production; |
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let mean = number * p; |
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//if (p < 0.01) { |
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// using Poisson distribution (would get slow for large numbers. |
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// there are fast formulas but I don't know how good they are) |
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//production = this.poisson.getPoisson(mean); |
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//} else { |
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// Gaussian distribution |
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let q = 1 - p; |
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let variance = number * p * q; |
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let std = Math.sqrt(variance); |
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production = Math.round(this.gaussian.nextGaussian() * std + mean); |
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//} |
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if (production > number) { |
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production = number; |
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} |
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if (production < 0) { |
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production = 0; |
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} |
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return production; |
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}; |
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this.trustHTML = function(html) { |
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return $sce.trustAsHtml(html); |
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}; |
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} |
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]); |
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angarg12 /
nucleogenesis
