From a82d76ca464481bbcaad012202aab32efd525018 Mon Sep 17 00:00:00 2001
From: Tropical <42101043+tropicaaal@users.noreply.github.com>
Date: Wed, 25 Mar 2026 12:43:41 -0500
Subject: [PATCH] refactor: `Tesselator` thread-local storage

---
 Minecraft.Client/Rendering/Tesselator.cpp | 7 +++----
 Minecraft.Client/Rendering/Tesselator.h   | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/Minecraft.Client/Rendering/Tesselator.cpp b/Minecraft.Client/Rendering/Tesselator.cpp
index 35e472a45..25d9014b2 100644
--- a/Minecraft.Client/Rendering/Tesselator.cpp
+++ b/Minecraft.Client/Rendering/Tesselator.cpp
@@ -24,15 +24,14 @@ int normal;
 
 
 */
-unsigned int Tesselator::tlsIdx = TlsAlloc();
+thread_local Tesselator* Tesselator::m_thread_instance = nullptr;
 
 Tesselator* Tesselator::getInstance() {
-    return (Tesselator*)TlsGetValue(tlsIdx);
+    return m_thread_instance;
 }
 
 void Tesselator::CreateNewThreadStorage(int bytes) {
-    Tesselator* instance = new Tesselator(bytes / 4);
-    TlsSetValue(tlsIdx, instance);
+    Tesselator::m_thread_instance = new Tesselator(bytes / 4);
 }
 
 // she tessalate my vertices till i render
diff --git a/Minecraft.Client/Rendering/Tesselator.h b/Minecraft.Client/Rendering/Tesselator.h
index 02d43a12c..bd9edecc2 100644
--- a/Minecraft.Client/Rendering/Tesselator.h
+++ b/Minecraft.Client/Rendering/Tesselator.h
@@ -41,7 +41,7 @@ public:
     static void CreateNewThreadStorage(int bytes);
 
 private:
-    static unsigned int tlsIdx;
+    static thread_local Tesselator* m_thread_instance;
 
 public:
     static Tesselator* getInstance();