neoLegacy/Minecraft.World/SmoothLayer.cpp

#include "stdafx.h"
#include "net.minecraft.world.level.newbiome.layer.h"

SmoothLayer::SmoothLayer(int32_t seed,  int64_t seedMixup,shared_ptr<Layer> parent) : Layer(seed,seedMixup)
{
	this->parent = parent;
}

intArray SmoothLayer::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 (l == r && u == d)
            {
                initRandom(x + xo, y + yo);
                if (nextRandom(2) == 0) c = l;
                else c = u;
            }
            else if (l == r)
            {
                initRandom(x + xo, y + yo);
                if (nextRandom(2) == 0) c = l;
            }
            else if (u == d)
            {
                c = u;
            }

            result[x + y * w] = c;
        }
    }
    return result;
}