first commit

Minecraft.World/AddIslandLayer.cpp

@@ -0,0 +1,64 @@
+#include "stdafx.h"
+#include "net.minecraft.world.level.newbiome.layer.h"
+#include "net.minecraft.world.level.biome.h"
+
+AddIslandLayer::AddIslandLayer(__int64 seedMixup, shared_ptr<Layer>parent) : Layer(seedMixup)
+{
+	this->parent = parent;
+}
+
+intArray AddIslandLayer::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))
+			{
+				int odds = 1;
+				int swap = 1;
+				if (n1 != 0 && nextRandom(odds++) == 0) swap = n1;
+				if (n2 != 0 && nextRandom(odds++) == 0) swap = n2;
+				if (n3 != 0 && nextRandom(odds++) == 0) swap = n3;
+				if (n4 != 0 && nextRandom(odds++) == 0) swap = n4;
+				if (nextRandom(3) == 0)
+				{
+					result[x + y * w] = swap;
+				}
+				else
+				{
+					if (swap == Biome::iceFlats->id) result[x + y * w] = Biome::frozenOcean->id;
+					else result[x + y * w] = 0;
+				}
+			}
+			else if (c > 0 && (n1 == 0 || n2 == 0 || n3 == 0 || n4 == 0))
+			{
+				if (nextRandom(5) == 0)
+				{
+					if (c == Biome::iceFlats->id) result[x + y * w] = Biome::frozenOcean->id;
+					else result[x + y * w] = 0;
+				}
+				else result[x + y * w] = c;
+			}
+			else
+			{
+				result[x + y * w] = c;
+			}
+		}
+	}
+
+	return result;
+}