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package lottery
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import (
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"GenshinImpact/global"
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"math/rand"
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)
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// 武器up池
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func PickWeaponUp() string {
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if global.LastRareWeapon >= 9 {
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global.LastRareWeapon -= 9
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}
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if global.LastEpicWeapon >= 80 {
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global.LastEpicWeapon -= 80
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}
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//保底
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if global.LastEpicWeapon == 79 {
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//必出橙色
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//fmt.Println("必出橙色-----------------------------------------------------------------------------------------------------------------------")
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return RandomEpicWeapon()
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}
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if global.LastRareWeapon == 9 {
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//必出紫色
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//fmt.Println("必出紫色")
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return RandomRareWeapon()
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}
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//单抽
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//up5占5星出货75%
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//up4占4星出货75%
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//5星概率为0.7% 最多80次必出5星
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//4星概率为6% 其中角色3% 武器3% 最多10次必出4星
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//当起源到4星时 75%为up武器
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//如果本次不是当期up 下一个一定是up
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//https://www.bilibili.com/read/cv12616453
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//模型五星综合概率为1.8779%，期望53.250抽，概率在第63抽开始上升，保底位置实为第77抽而非公示的第80抽。
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//作者：一棵平衡树 https://www.bilibili.com/read/cv12616453 出处：bilibili
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//模型四星综合概率为14.857%，期望6.7309抽，概率在第8抽开始上升，保底位置实为第9抽而非公示的第10抽。
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//作者：一棵平衡树 https://www.bilibili.com/read/cv12616453 出处：bilibili
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dice := rand.Intn(10000)
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adjustRateWeapon := 69
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if global.LastEpicWeapon > 61 {
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adjustRateWeapon = 770 + 700*(global.LastEpicWeapon-61)
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}
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adjustRateRareWeapon := 300 + 300
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if global.LastRareWeapon == 7 {
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adjustRateRareWeapon += 6000
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}
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switch {
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case dice <= adjustRateWeapon:
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//epic
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return RandomEpicWeapon()
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case dice <= adjustRateWeapon+adjustRateRareWeapon:
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//rare
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return RandomRareWeapon()
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default:
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//常驻3星武器
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return RandomCommonItemWeapon()
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}
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}
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// 常驻3星武器 武器池
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func RandomCommonItemWeapon() string {
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global.LastEpicWeapon += 1
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global.LastRareWeapon += 1
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commonItem := global.CommonItem
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return commonItem[rand.Intn(len(commonItem))]
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}
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