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Minecraft.World/AddMushroomIslandLayer.cpp

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+#include "stdafx.h"
+#include "net.minecraft.world.level.newbiome.layer.h"
+#include "net.minecraft.world.level.biome.h"
+
+
+AddMushroomIslandLayer::AddMushroomIslandLayer(__int64 seedMixup, shared_ptr<Layer> parent) : Layer(seedMixup)
+{
+	this->parent = parent;
+}
+
+intArray AddMushroomIslandLayer::getArea(int xo, int yo, int w, int h)
+{
+    int px = xo - 1;
+    int py = yo - 1;
+    int pw = w + 2;
+    int ph = h + 2;
+    intArray p = parent->getArea(px, py, pw, ph);
+
+    intArray result = IntCache::allocate(w * h);
+    for (int y = 0; y < h; y++)
+	{
+        for (int x = 0; x < w; x++)
+		{
+            int n1 = p[(x + 0) + (y + 0) * pw];
+            int n2 = p[(x + 2) + (y + 0) * pw];
+            int n3 = p[(x + 0) + (y + 2) * pw];
+            int n4 = p[(x + 2) + (y + 2) * pw];
+            int c = p[(x + 1) + (y + 1) * pw];
+            initRandom(x + xo, y + yo);
+            if (c == 0 && (n1 == 0 && n2 == 0 && n3 == 0 && n4 == 0) && nextRandom(100) == 0)
+			{
+                result[x + y * w] = Biome::mushroomIsland->id;
+            }
+			else
+			{
+                result[x + y * w] = c;
+            }
+        }
+    }
+    return result;
+}