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#include "stdafx.h"
#include "net.minecraft.world.level.biome.h"
#include "net.minecraft.world.level.newbiome.layer.h"
RiverLayer::RiverLayer(int64_t seedMixup, shared_ptr<Layer>parent) : Layer(seedMixup)
{
this->parent = parent;
}
intArray RiverLayer::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 l = p[(x + 0) + (y + 1) * pw];
int r = p[(x + 2) + (y + 1) * pw];
int u = p[(x + 1) + (y + 0) * pw];
int d = p[(x + 1) + (y + 2) * pw];
int c = p[(x + 1) + (y + 1) * pw];
if (c == 0 || (l == 0 || r == 0 || u == 0 || d == 0) || c != l || c != u || c != r || c != d)
{
result[x + y * w] = Biome::river->id;
}
else
{
result[x + y * w] = -1;
}
}
}
return result;
}
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