雷索纳斯砍价抬价期望疲劳计算

README.md

在当前页面按 F12 打开 devtool，把下面的代码粘贴到 console 里回车执行

function calc(config) {
  const SUCCESS_USE = 8;
  const FAILED_USE = Math.max(0, SUCCESS_USE - config.reduceGrowthWhenFailed);
  const EACH_SUCCESS_REDUCE_PROB = 0.1;
  const run = ({ totalCount, successCount, isLastFailed }) => {
    const curProb = Math.min(1, config.initProb + (totalCount === 0 ? config.fistTryAddProb : 0) - successCount * EACH_SUCCESS_REDUCE_PROB + (isLastFailed ? config.failedAddProb : 0));
    if (successCount >= config.successNumber || totalCount >= config.maxTry || curProb <= 0) {
      return successCount * SUCCESS_USE + (totalCount - successCount) * FAILED_USE;
    }
    return curProb * run({ totalCount: totalCount + 1, successCount: successCount + 1, isLastFailed: false }) + (curProb === 1 ? 0 : (1 - curProb) * run({ totalCount: totalCount + 1, successCount, isLastFailed: true }));
  };
  return run({ totalCount: 0, successCount: 0, isLastFailed: false });
}

然后执行以下函数计算

calc({
  // 需要成功次数
  successNumber: 2,
  // 砍抬次数上限
  maxTry: 7,
  // 初始成功率（游戏内看的要去除生活技能首次增加的成功率）
  initProb: 0.8,
  // 生活技能：首次议价增加成功率
  fistTryAddProb: 0,
  // 生活技能：失败时下一次增加成功率
  failedAddProb: 0.05,
  // 生活技能：议价失败时增加的疲劳值减少
  reduceGrowthWhenFailed: 1
})

calc.ts

interface Config {
  successNumber: number;
  maxTry: number;
  initProb: number;
  fistTryAddProb: number;
  failedAddProb: number;
  reduceGrowthWhenFailed: number;
}

interface State {
  totalCount: number;
  successCount: number;
  isLastFailed: boolean;
}

function calc(config: Readonly<Config>) {
  const SUCCESS_USE = 8;
  const FAILED_USE = Math.max(0, SUCCESS_USE - config.reduceGrowthWhenFailed);
  const EACH_SUCCESS_REDUCE_PROB = 0.1;

  const run = ({ totalCount, successCount, isLastFailed }: State) => {
    const curProb = Math.min(
      1,
      config.initProb +
        (totalCount === 0 ? config.fistTryAddProb : 0) -
        successCount * EACH_SUCCESS_REDUCE_PROB +
        (isLastFailed ? config.failedAddProb : 0)
    );

    if (successCount >= config.successNumber || totalCount >= config.maxTry || curProb <= 0) {
      return successCount * SUCCESS_USE + (totalCount - successCount) * FAILED_USE;
    }

    return (
      curProb * run({ totalCount: totalCount + 1, successCount: successCount + 1, isLastFailed: false }) +
      (curProb === 1 ? 0 : (1 - curProb) * run({ totalCount: totalCount + 1, successCount, isLastFailed: true }))
    );
  };

  return run({ totalCount: 0, successCount: 0, isLastFailed: false });
}

console.log(
  calc({
    // 需要成功次数
    successNumber: 2,
    // 砍抬次数上限
    maxTry: 7,
    // 初始成功率（游戏内看的要去除生活技能首次增加的成功率）
    initProb: 0.8,
    // 生活技能：首次议价增加成功率
    fistTryAddProb: 0,
    // 生活技能：失败时下一次增加成功率
    failedAddProb: 0.05,
    // 生活技能：议价失败时增加的疲劳值减少
    reduceGrowthWhenFailed: 1,
  })
);