Formula
CommonFun.getItemReduceValue
function CommonFun.getItemReduceValue(deltalv, star)
local extrper = 0
local extrper1 = 0
local extrper2 = 0
if -40 <= deltalv then
extrper1 = 1
elseif -50 <= deltalv and deltalv <= -41 then
extrper1 = 0.9
elseif -60 <= deltalv and deltalv <= -51 then
extrper1 = 0.8
elseif -70 <= deltalv and deltalv <= -61 then
extrper1 = 0.7
elseif deltalv < -70 then
extrper1 = 0.6
end
if -30 <= deltalv then
extrper2 = 1
elseif -40 <= deltalv and deltalv <= -31 then
extrper2 = 0.9
elseif -50 <= deltalv and deltalv <= -41 then
extrper2 = 0.8
elseif -60 <= deltalv and deltalv <= -51 then
extrper2 = 0.7
elseif -70 <= deltalv and deltalv <= -61 then
extrper2 = 0.6
elseif deltalv < -70 then
extrper2 = 0.5
end
if star ~= nil and star == true then
extrper = extrper1
else
extrper = extrper2
end
return extrper
end