From f31fdaa27d005b769404625732079d55accc9591 Mon Sep 17 00:00:00 2001
From: bluextx <bluextchannel@gmail.com>
Date: Sat, 11 Jan 2025 08:31:59 +0300
Subject: [PATCH] Replaced NumSharp with custom math functions for mean and
 standard deviation calculations

---
 .../LootDumpProcessor.csproj                  | 59 +++++++++----------
 .../LooseLootProcessor/LooseLootProcessor.cs  | 29 ++++++---
 2 files changed, 51 insertions(+), 37 deletions(-)

diff --git a/source/LootDumpProcessor/LootDumpProcessor.csproj b/source/LootDumpProcessor/LootDumpProcessor.csproj
index c4bbc05..fb0ee1b 100644
--- a/source/LootDumpProcessor/LootDumpProcessor.csproj
+++ b/source/LootDumpProcessor/LootDumpProcessor.csproj
@@ -1,36 +1,35 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-    <ServerGarbageCollection>true</ServerGarbageCollection>
-	<GarbageCollectionAdaptationMode>1</GarbageCollectionAdaptationMode>
-    <ConcurrentGarbageCollection>true</ConcurrentGarbageCollection>
-  </PropertyGroup>
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <ServerGarbageCollection>true</ServerGarbageCollection>
+        <GarbageCollectionAdaptationMode>1</GarbageCollectionAdaptationMode>
+        <ConcurrentGarbageCollection>true</ConcurrentGarbageCollection>
+    </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="7z.Libs" Version="21.7.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
-    <PackageReference Include="NumSharp" Version="0.30.0" />
-    <PackageReference Include="SevenZipSharp.Interop" Version="19.1.0" />
-    <PackageReference Include="System.Configuration.ConfigurationManager" Version="7.0.0" />
-    <PackageReference Include="YamlDotNet" Version="13.0.0" />
-  </ItemGroup>
+    <ItemGroup>
+        <PackageReference Include="7z.Libs" Version="21.7.0"/>
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.0"/>
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.2"/>
+        <PackageReference Include="SevenZipSharp.Interop" Version="19.1.0"/>
+        <PackageReference Include="System.Configuration.ConfigurationManager" Version="7.0.0"/>
+        <PackageReference Include="YamlDotNet" Version="13.0.0"/>
+    </ItemGroup>
 
-  <ItemGroup>
-    <None Update="Config\forced_loose.yaml">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-    <None Update="Config\forced_static.yaml">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-    <None Update="Config\config.json">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
+    <ItemGroup>
+        <None Update="Config\forced_loose.yaml">
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </None>
+        <None Update="Config\forced_static.yaml">
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </None>
+        <None Update="Config\config.json">
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </None>
+    </ItemGroup>
 
 </Project>
diff --git a/source/LootDumpProcessor/Process/Processor/v2/LooseLootProcessor/LooseLootProcessor.cs b/source/LootDumpProcessor/Process/Processor/v2/LooseLootProcessor/LooseLootProcessor.cs
index e15eda0..13be903 100644
--- a/source/LootDumpProcessor/Process/Processor/v2/LooseLootProcessor/LooseLootProcessor.cs
+++ b/source/LootDumpProcessor/Process/Processor/v2/LooseLootProcessor/LooseLootProcessor.cs
@@ -6,7 +6,6 @@ using LootDumpProcessor.Storage;
 using LootDumpProcessor.Storage.Collections;
 using LootDumpProcessor.Utils;
 using Microsoft.Extensions.Logging;
-using NumSharp;
 
 namespace LootDumpProcessor.Process.Processor.v2.LooseLootProcessor
 {
@@ -61,7 +60,7 @@ namespace LootDumpProcessor.Process.Processor.v2.LooseLootProcessor
         )
         {
             var config = LootDumpProcessorContext.GetConfig();
-            var spawnPointTolerance = config.ProcessorConfig.SpawnPointToleranceForForced / 100;
+            var spawnPointTolerance = config.ProcessorConfig.SpawnPointToleranceForForced / 100.0;
             var looseLootDistribution = new LooseLootRoot();
 
             var probabilities = new Dictionary<string, double>();
@@ -73,9 +72,9 @@ namespace LootDumpProcessor.Process.Processor.v2.LooseLootProcessor
                 probabilities[itemId] = (double)count / mapCount;
             }
 
-            var spawnPointCount = looseLootCountsItem.MapSpawnpointCount.Select(Convert.ToDouble);
-            var initialMean = np.mean(np.array(spawnPointCount)).ToArray<double>().First();
-            var tolerancePercentage = config.ProcessorConfig.LooseLootCountTolerancePercentage / 100;
+            var spawnPointCount = looseLootCountsItem.MapSpawnpointCount.Select(Convert.ToDouble).ToList();
+            var initialMean = CalculateMean(spawnPointCount);
+            var tolerancePercentage = config.ProcessorConfig.LooseLootCountTolerancePercentage / 100.0;
             var highThreshold = initialMean * (1 + tolerancePercentage);
 
             looseLootCountsItem.MapSpawnpointCount = looseLootCountsItem.MapSpawnpointCount
@@ -84,8 +83,8 @@ namespace LootDumpProcessor.Process.Processor.v2.LooseLootProcessor
 
             looseLootDistribution.SpawnPointCount = new SpawnPointCount
             {
-                Mean = np.mean(np.array(looseLootCountsItem.MapSpawnpointCount)),
-                Std = np.std(np.array(looseLootCountsItem.MapSpawnpointCount))
+                Mean = CalculateMean(looseLootCountsItem.MapSpawnpointCount.Select(Convert.ToDouble).ToList()),
+                Std = CalculateStandardDeviation(looseLootCountsItem.MapSpawnpointCount.Select(Convert.ToDouble).ToList())
             };
             looseLootDistribution.SpawnPointsForced = new List<SpawnPointsForced>();
             looseLootDistribution.SpawnPoints = new List<SpawnPoint>();
@@ -227,5 +226,21 @@ namespace LootDumpProcessor.Process.Processor.v2.LooseLootProcessor
 
             return looseLootDistribution;
         }
+
+        private double CalculateMean(IReadOnlyList<double> numbers)
+        {
+            if (!numbers.Any()) return 0;
+
+            return numbers.Average();
+        }
+
+        private double CalculateStandardDeviation(IReadOnlyList<double> numbers)
+        {
+            if (numbers.Count == 0) return 0;
+
+            var mean = CalculateMean(numbers);
+            var variance = numbers.Sum(num => Math.Pow(num - mean, 2)) / numbers.Count;
+            return Math.Sqrt(variance);
+        }
     }
 }
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