initial commit

scripts/vscripts/common/incoming_damage_reduction_math.lua

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+local ____lualib = require("lualib_bundle")
+local __TS__NumberIsFinite = ____lualib.__TS__NumberIsFinite
+local ____exports = {}
+--- Верхний предел после убывания (как в `incoming_damage_reduction_combine`).
+____exports.MAX_EFFECTIVE_INCOMING_REDUCTION_FROM_LINEAR_SUM_PCT = 92
+____exports.INCOMING_DAMAGE_REDUCTION_STAT_KEY = "incoming_damage_reduction_pct"
+--- «Бумажная» сумма % снижения входящего → эффективный % в бою (убывающая отдача).
+-- 
+-- @param linearSumPositivePct сумма вкладов из KV/арсенала (+20+20+…)
+function ____exports.resolveIncomingDamageReductionPctFromLinearSum(self, linearSumPositivePct)
+    if not __TS__NumberIsFinite(linearSumPositivePct) or linearSumPositivePct <= 0 then
+        return 0
+    end
+    local s = linearSumPositivePct
+    local hyperbolic = 100 * s / (100 + s)
+    return math.min(____exports.MAX_EFFECTIVE_INCOMING_REDUCTION_FROM_LINEAR_SUM_PCT, hyperbolic)
+end
+--- Значение для MODIFIER_PROPERTY_INCOMING_DAMAGE_PERCENTAGE (отрицательное = меньше урона).
+function ____exports.incomingDamageReductionModifierValue(self, linearSumPositivePct)
+    local effective = ____exports.resolveIncomingDamageReductionPctFromLinearSum(nil, linearSumPositivePct)
+    return effective > 0 and -effective or 0
+end
+return ____exports