114 lines
2.6 KiB
C++
114 lines
2.6 KiB
C++
#pragma once
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// 概率命中, 针对游戏中一些概率发生事件的处理
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// 例如：概率20%，意味着5次一定会命中一次。具体在哪次命中，这个具有一定的随机性
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// 支持两种类型 1：百分比 2：指定n/m
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#define CIRCLE_HIT_COUNT 100
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class CRandHit : public Counter<CRandHit>
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{
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public:
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CRandHit()
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{
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m_nCurrHitCount = 0;
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m_nRandCount = 0;
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m_nNeedRandCount = 0;
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m_nHitCountInCircle = CIRCLE_HIT_COUNT;
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}
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// 设置命中概率（百分比，0-100）
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/*
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* Comments:设置随机概率
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* Param unsigned int nRate: 100次命中操作中随机的次数 【0，100】。0不会随机，100是百分百随机
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* @Return void: 100次为周期，随机nRate次
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*/
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void SetHitRate(unsigned int nRate)
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{
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nRate = __min(nRate, CIRCLE_HIT_COUNT);
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m_nNeedRandCount = nRate;
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m_nHitCountInCircle = CIRCLE_HIT_COUNT;
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NextCircle();
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}
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/*
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* Comments: 设置随机参数。
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* Param unsigned int nHitCount: 命中次数m
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* Param unsigned int nRandCount:随机次数n
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* @Return void: m次中随机n次
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*/
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void SetHitInfo(unsigned int nHitCount, unsigned int nRandCount)
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{
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nRandCount = __min(nHitCount, nRandCount);
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m_nHitCountInCircle = nHitCount;
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m_nNeedRandCount = nRandCount;
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NextCircle();
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}
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/*
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* Comments: 命中测试
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* @Return bool: 如果命中成功，返回true；否则返回false
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*/
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bool Hit()
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{
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bool bRet = false;
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if (m_nNeedRandCount == 0) // 绝对不命中
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return false;
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m_nCurrHitCount++;
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if (!RandFinishedInCurrCircle())
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{
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if (GetLeftHitCount() < GetLeftRandCount())
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bRet = true; // 绝对命中
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else
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bRet = wrand(2) % 2 == 1 ? true : false;
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if (bRet)
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m_nRandCount++;
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}
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if (GetLeftHitCount() == 0) // 开启新的周期
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NextCircle();
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return bRet;
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}
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private:
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void NextCircle()
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{
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m_nCurrHitCount = 0;
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m_nRandCount = 0;
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}
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inline bool RandFinishedInCurrCircle()
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{
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return m_nRandCount == m_nNeedRandCount ? true : false;
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}
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inline unsigned int GetLeftHitCount()
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{
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return m_nHitCountInCircle - m_nCurrHitCount;
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}
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inline unsigned int GetLeftRandCount()
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{
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return m_nNeedRandCount - m_nRandCount;
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}
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private:
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unsigned int m_nCurrHitCount; // 当前周期触发的次数
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unsigned int m_nNeedRandCount; // 一个周期需要随机的次数 n
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unsigned int m_nRandCount; // 成功随机的次数
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unsigned int m_nHitCountInCircle; // 一个周期触发的总次数 m
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};
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// 组随机
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// 功能：将多个概率随机归结到一个组。在组的每次随机中，一个组的值最多只随机出一个。
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//class CRandHitGroup
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//{
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//public:
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// CVector<CRandHit> m_RandHitList;
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//};
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