Added universal RNGNext function

eid_api.lua

@@ -1055,17 +1055,11 @@ end
 -- Didn't seem right to put them in main or eid_modifiers
 local numVoidable = 0
 local numRunable = 0
-local function VoidRNGNext(num)
-	num = num ~ ((num >> 5) & 4294967295)
-	num = num ~ ((num << 9) & 4294967295)
-	num = num ~ ((num >> 7) & 4294967295)
-	return num >> 0;
-end
 local function GetTwoIncreases(rng, tbl)
 	local statTable = {1,2,3,4,5,6}
 	-- perform 5 random swaps of our stat table
 	for i = 6, 2, -1 do
-		rng = VoidRNGNext(rng)
+		rng = EID:RNGNext(rng, 5, 9, 7)
 		local result = (rng % i) + 1
 		local temp = statTable[i]
 		statTable[i] = statTable[result]
@@ -1103,14 +1097,13 @@ end
 -- Determine what stats will be increased after 1 absorption, the whole room's absorption, and whole room + a purchased item above your head
 function EID:VoidRNGCheck(player, isRune)
 	local increases = {0, 0, 0, 0, 0, 0}
-	local shopItemIncreases = {}; local singleIncreases = {}
 	
 	local startRNG = (isRune and player:GetCardRNG(Card.RUNE_BLACK):GetSeed()) or player:GetCollectibleRNG(CollectibleType.COLLECTIBLE_VOID):GetSeed()
 	local count = (isRune and numRunable) or numVoidable
 	local eidTable = (isRune and EID.BlackRuneStatIncreases) or EID.VoidStatIncreases
 	
 	-- in Repentance, an additional RNG call is done before the 5 for stat ups when using Void
-	if REPENTANCE and not isRune then startRNG = VoidRNGNext(startRNG) end
+	if REPENTANCE and not isRune then startRNG = EID:RNGNext(startRNG, 5, 9, 7) end
 	for i = 1, count do
 		startRNG = GetTwoIncreases(startRNG, increases)
 		if i == 1 then eidTable[3] = {table.unpack(increases)} end
@@ -1716,3 +1709,19 @@ end
 function EID:AddIconToObject(eType, eVariant, eSubType, iconName)
 	EID.ObjectIcon[eType.."."..eVariant.."."..eSubType] = EID.InlineIcons[iconName]
 end
+
+-- reimplementation of RNG Seed shift feature used by the game. Mostly used for RNG Prediction features
+function EID:RNGNext(rngNum, shift1, shift2, shift3)
+	rngNum = rngNum ~ ((rngNum >> shift1) & 4294967295)
+	rngNum = rngNum ~ ((rngNum << shift2) & 4294967295)
+	rngNum = rngNum ~ ((rngNum >> shift3) & 4294967295)
+	return rngNum >> 0;
+end
+
+-- General RNG functions for RNG predicting
+function EID:SeedToFloat(seed)
+	local multi = 2.3283061589829401E-10;
+	return seed * multi;
+end
+
+end