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96 lignes
2.4 KiB
96 lignes
2.4 KiB
#pragma once
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#include <vector>
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#include <array>
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template<typename T, size_t chunk_size = 16>
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struct cube {
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struct chunk_elem_t {
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size_t coord;
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T elem;
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};
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struct chunk_t {
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std::array<std::array<std::vector<chunk_elem_t>, chunk_size>, chunk_size> data;
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};
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struct row_t {
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size_t coord;
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std::shared_ptr<chunk_t> value;
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};
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struct column_t {
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size_t coord;
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std::vector<row_t> value;
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};
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std::vector<column_t> chunks;
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std::optional<T> at(size_t x, size_t y, size_t z) {
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auto column = std::ranges::find_if(chunks, [&](const column_t& col) {
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return col.coord == y/chunk_size;
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});
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if(column == chunks.end()) return std::nullopt;
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auto row = std::ranges::find_if(column->value, [&](const row_t& row) {
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return row.coord == x/chunk_size;
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});
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if(column->value.end() == row) return std::nullopt;
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auto& chunk_segment = row->value->data.at(x%chunk_size).at(y%chunk_size);
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auto position = std::ranges::find_if(chunk_segment, [&](const chunk_elem_t& item) {
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return item.coord == z;
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});
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if(position == chunk_segment.end()) return std::nullopt;
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return position->elem;
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}
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void set(size_t x, size_t y, size_t z, T&& value) {
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auto column = std::ranges::find_if(chunks, [&](const column_t& col) {
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return col.coord == y/chunk_size;
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});
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if(column == chunks.end()) {
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auto chunk = std::make_shared<chunk_t>();
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chunks.push_back(column_t{
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.coord = y / chunk_size,
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.value = {
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row_t{
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.coord = x/chunk_size,
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.value = chunk
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}
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}
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});
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chunk->data.at(x%chunk_size).at(y%chunk_size).push_back(chunk_elem_t{
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.coord = z,
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.elem = std::move(value)
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});
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return;
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}
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auto row = std::ranges::find_if(column->value, [&](const row_t& row) {
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return row.coord == x/chunk_size;
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});
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if(column->value.end() == row) {
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auto chunk = std::make_shared<chunk_t>();
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column->value.push_back(
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row_t{
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.coord = x/chunk_size,
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.value = chunk
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}
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);
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chunk->data.at(x%chunk_size).at(y%chunk_size).push_back(chunk_elem_t{
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.coord = z,
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.elem = std::move(value)
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});
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return;
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}
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auto& chunk_segment = row->value->data.at(x%chunk_size).at(y%chunk_size);
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auto position = std::ranges::find_if(chunk_segment, [&](const chunk_elem_t& item) {
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return item.coord == z;
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});
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if(position == chunk_segment.end()) {
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chunk_segment.push_back(chunk_elem_t{
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.coord = z,
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.elem = std::move(value)
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});
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return;
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}
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position->elem = std::move(value);
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}
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};
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