From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/BiomeOverrideLayer.cpp | 81 ++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 Minecraft.World/BiomeOverrideLayer.cpp

(limited to 'Minecraft.World/BiomeOverrideLayer.cpp')

diff --git a/Minecraft.World/BiomeOverrideLayer.cpp b/Minecraft.World/BiomeOverrideLayer.cpp
new file mode 100644
index 00000000..a44295dc
--- /dev/null
+++ b/Minecraft.World/BiomeOverrideLayer.cpp
@@ -0,0 +1,81 @@
+#include "stdafx.h"
+#include "net.minecraft.world.level.biome.h"
+#include "net.minecraft.world.level.newbiome.layer.h"
+#include "net.minecraft.world.level.h"
+#include "BiomeOverrideLayer.h"
+
+
+BiomeOverrideLayer::BiomeOverrideLayer(int seedMixup) : Layer(seedMixup)
+{
+	m_biomeOverride = byteArray( width * height );
+
+#ifdef _UNICODE
+	wstring path = L"GAME:\\GameRules\\biomemap.bin";
+	HANDLE file = CreateFile(path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+#else
+#ifdef _WINDOWS64
+	string path = "GameRules\\biomemap.bin";
+#else
+	string path = "GAME:\\GameRules\\biomemap.bin";
+#endif
+	HANDLE file = CreateFile(path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+#endif
+	if( file == INVALID_HANDLE_VALUE )
+	{
+		DWORD error = GetLastError();
+		//assert(false);
+		app.DebugPrintf("Biome override not found, using plains as default\n");
+
+		memset(m_biomeOverride.data,Biome::plains->id,m_biomeOverride.length);
+	}
+	else
+	{
+
+#ifdef _DURANGO
+		__debugbreak();	// TODO
+		DWORD bytesRead,dwFileSize = 0;
+#else
+		DWORD bytesRead,dwFileSize = GetFileSize(file,NULL);
+#endif
+		if(dwFileSize > m_biomeOverride.length)
+		{
+			app.DebugPrintf("Biomemap binary is too large!!\n");
+			__debugbreak();
+		}
+		BOOL bSuccess = ReadFile(file,m_biomeOverride.data,dwFileSize,&bytesRead,NULL);
+
+		if(bSuccess==FALSE)
+		{
+			app.FatalLoadError();
+		}
+
+		CloseHandle(file);
+	}
+}
+
+intArray BiomeOverrideLayer::getArea(int xo, int yo, int w, int h)
+{
+	intArray result = IntCache::allocate(w * h);
+
+	int xOrigin = xo + width/2;
+	int yOrigin = yo + height/2;
+	if(xOrigin < 0 ) xOrigin = 0;
+	if(xOrigin >= width) xOrigin = width - 1;
+	if(yOrigin < 0 ) yOrigin = 0;
+	if(yOrigin >= height) yOrigin = height - 1;
+	for (int y = 0; y < h; y++)
+	{
+		for (int x = 0; x < w; x++)
+		{
+			int curX = xOrigin + x;
+			int curY = yOrigin + y;
+			if(curX >= width) curX = width - 1;
+			if(curY >= height) curY = height - 1;
+			int index = curX + curY * width;
+
+			unsigned char headerValue = m_biomeOverride[index];
+			result[x + y * w] = headerValue;
+		}
+	}
+	return result;
+}
\ No newline at end of file
-- 
cgit v1.2.3