如何通过给定的经验获得水平？

Question

I have a formula that calculates the experience based on a certain level and another that calculates the level based on the given experience. But the second function does not return the expected value.

 const levels = 40; const xp_for_first_level = 1000; const xp_for_last_level = 1000000; const getExperience = level => { const B = Math.log(xp_for_last_level / xp_for_first_level) / (levels - 1); const A = xp_for_first_level / (Math.exp(B) - 1.0); const old_xp = Math.round(A * Math.exp(B * (level - 1))); const new_xp = Math.round(A * Math.exp(B * level)); return new_xp - old_xp; }; const getLevel = experience => { const B = Math.log(xp_for_last_level / xp_for_first_level) / (levels - 1); const A = xp_for_first_level / (Math.exp(B) - 1.0); return Math.ceil(Math.log(experience / A) / B); }; console.log(getLevel(xp_for_first_level)); // -9 console.log(getLevel(xp_for_last_level)); // 30 

Expected result 1 and 40, but returns -9 and 30.

Can anyone help?

Anyone enlighten me, please?

Answer 1

I think the formula should change, i tried with this and it given correct return.

const getLevel = experience => {
  const B = Math.log(xp_for_last_level / xp_for_first_level) / (levels + 1);
  const A = xp_for_first_level - 1;
  return Math.ceil(Math.log(experience / A) / B);
};