57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
#pragma once
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#include <QtCore/QtGlobal>
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#include <QtCore/QDebug>
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#include <QtCore/QTime>
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#include <QRandomGenerator>
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namespace LAMPMainWidget {
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/*
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* 浮点数判断的精度值
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*/
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const double DoublePrecision{0.00000001};
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/*
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* 判断的d1和d2是否符合精度要求
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* @param d1 浮点数
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* @param d2 浮点数
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* @param precision 精度要求
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* @return 小于进度要求返回true，否则返回false
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*/
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inline bool
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isDoubleNearby(double d1, double d2, double precision = DoublePrecision) {
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return qAbs(d1 - d2) < precision;
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}
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/*
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* 获取min和max间的随机整数
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* @param min 最小值
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* @param max 最大值
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* @return 随机的整数
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*/
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inline int
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randomInt(int min, int max) {
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if (max <= min) {
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qDebug() << "随机数的最大值大于最小值";
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return -1;
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}
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//qsrand(static_cast<uint>(QTime{0, 0}.msecsTo(QTime::currentTime())));
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quint32 seed = static_cast<quint32>(QTime{ 0, 0 }.msecsTo(QTime::currentTime()));
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QRandomGenerator seededGenerator(seed);
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return min + seededGenerator.bounded(max - min) ;
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}
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/*
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* 快速计算2的阶乘
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* @param n 阶数
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* @return 返回结果
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*/
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inline int
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power2(int n) {
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return 1u << static_cast<unsigned>(n);
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}
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}
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