4jcraft/targets/minecraft/world/level/chunk/DataLayer.cpp

#include "DataLayer.h"

DataLayer::DataLayer(int length, int depthBits)
    : depthBits(depthBits), depthBitsPlusFour(depthBits + 4) {
    data = std::vector<uint8_t>(length >> 1);
}

DataLayer::DataLayer(std::vector<uint8_t>& data, int depthBits)
    : depthBits(depthBits), depthBitsPlusFour(depthBits + 4) {
    this->data = data;
}

int DataLayer::get(int x, int y, int z) {
    int pos = (x << depthBitsPlusFour | z << depthBits | y);
    int slot = pos >> 1;
    int part = pos & 1;

    if (part == 0) {
        return data[slot] & 0xf;
    } else {
        return (data[slot] >> 4) & 0xf;
    }
}

void DataLayer::set(int x, int y, int z, int val) {
    int pos = (x << depthBitsPlusFour | z << depthBits | y);

    int slot = pos >> 1;
    int part = pos & 1;

    if (part == 0) {
        data[slot] = (uint8_t)((data[slot] & 0xf0) | (val & 0xf));
    } else {
        data[slot] = (uint8_t)((data[slot] & 0x0f) | ((val & 0xf) << 4));
    }
}

bool DataLayer::isValid() { return !data.empty(); }

void DataLayer::setAll(int br) {
    uint8_t val = (uint8_t)(br & (br << 4));
    for (unsigned int i = 0; i < data.size(); i++) {
        data[i] = val;
    }
}