first commit

Minecraft.World/RiverInitLayer.cpp

@@ -0,0 +1,24 @@
+#include "stdafx.h"
+#include "net.minecraft.world.level.newbiome.layer.h"
+
+RiverInitLayer::RiverInitLayer(__int64 seed, shared_ptr<Layer>parent) : Layer(seed)
+{
+	this->parent = parent;
+}
+
+intArray RiverInitLayer::getArea(int xo, int yo, int w, int h)
+{
+	intArray b = parent->getArea(xo, yo, w, h);
+
+	intArray result = IntCache::allocate(w * h);
+	for (int y = 0; y < h; y++)
+	{
+		for (int x = 0; x < w; x++)
+		{
+			initRandom(x + xo, y + yo);
+			result[x + y * w] = b[x + y * w] > 0 ? nextRandom(2) + 2 : 0;
+		}
+	}
+
+	return result;
+}