78 lines
2.1 KiB
JavaScript
78 lines
2.1 KiB
JavaScript
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function chooseDict(dict, rand=Math.random) {
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if (Object.keys(dict).length == 0) return undefined;
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let sum = 0;
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for (let key of Object.keys(dict)) {
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sum += dict[key];
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}
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sum *= rand();
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for (let key of Object.keys(dict)) {
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sum -= dict[key];
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if (sum <= 0) return key;
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}
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return Object.keys(dict)[0];
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}
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function mixColors(color_a, color_b) {
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return [Math.round(Math.sqrt(color_a[0] * color_a[0] / 2 + color_b[0] * color_b[0] / 2)),
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Math.round(Math.sqrt(color_a[1] * color_a[1] / 2 + color_b[1] * color_b[1] / 2)),
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Math.round(Math.sqrt(color_a[2] * color_a[2] / 2 + color_b[2] * color_b[2] / 2))];
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}
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function formAsRGB(color) {
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return "rgb(" + color[0] + "," + color[1] + "," + color[2] + ")";
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}
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function properPrecision(number, digits) {
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let sign = number.sign;
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let result = "";
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if (sign < 0) result += "-";
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let numlog = number.abs().max(1e-100).log10();
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if (numlog.gt(1e9)) {
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result += "e";
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numlog = numlog.log10();
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}
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numlog = numlog.toNumber();
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if (round_prec(Math.pow(10, numlog - Math.floor(numlog)), Math.pow(10, digits)) == 10) numlog = Math.round(numlog);
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result += pad_number(Math.pow(10, numlog - Math.floor(numlog)), digits);
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result += "e";
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result += Math.floor(numlog);
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return new Decimal(result);
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}
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function choose(list, rand=Math.random) {
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return list[Math.min(Math.floor(rand() * list.length), list.length - 1)];
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}
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function openModal(id) {
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closeModal();
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document.getElementById(id).style.display = "";
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}
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function closeModal() {
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for (let element of document.getElementsByClassName('modal-container')) {
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element.style.display = "none";
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}
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}
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// Simple Fast Counter is a part of PractRand suite by Chris Doty-Humphrey.
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function sfc32(a, b, c, d) {
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return function() {
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a >>>= 0; b >>>= 0; c >>>= 0; d >>>= 0;
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var t = (a + b) | 0;
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a = b ^ b >>> 9;
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b = c + (c << 3) | 0;
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c = (c << 21 | c >>> 11);
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d = d + 1 | 0;
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t = t + d | 0;
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c = c + t | 0;
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return (t >>> 0) / 4294967296;
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}
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}
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