first commit

Minecraft.World/IslandLayer.cpp

@@ -0,0 +1,25 @@
+#include "stdafx.h"
+#include "net.minecraft.world.level.newbiome.layer.h"
+
+IslandLayer::IslandLayer(__int64 seedMixup) : Layer(seedMixup)
+{
+}
+
+intArray IslandLayer::getArea(int xo, int yo, int w, int h)
+{
+	intArray result = IntCache::allocate(w * h);
+	for (int y = 0; y < h; y++)
+	{
+		for (int x = 0; x < w; x++)
+		{
+			initRandom(xo + x, yo + y);
+			result[x + y * w] = (nextRandom(10) == 0) ? 1 : 0;
+		}
+	}
+	// if (0, 0) is located here, place an island
+	if (xo > -w && xo <= 0 && yo > -h && yo <= 0)
+	{
+		result[-xo + -yo * w] = 1;
+	}
+	return result;
+}