TileAutotile.h

Go to the documentation of this file.

// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <array>
#include <cstdint>
#include <string_view>
 
#include "Core/Levels/TileMap.h"

 
namespace hmi {

enum NeighborBits : std::uint8_t {
    NEIGHBOR_UP = 1u << 0,     
    NEIGHBOR_RIGHT = 1u << 1,  
    NEIGHBOR_DOWN = 1u << 2,   
    NEIGHBOR_LEFT = 1u << 3,   
};

inline constexpr int AUTOTILE_SHEET_SIDE = 4;

inline constexpr int AUTOTILE_CONFIGURATION_COUNT = AUTOTILE_SHEET_SIDE * AUTOTILE_SHEET_SIDE;

struct AutotileCell {
    int column = 0;
    int row = 0;
 
    [[nodiscard]] friend bool operator==(const AutotileCell& lhs,
                                         const AutotileCell& rhs) noexcept {
        return lhs.column == rhs.column && lhs.row == rhs.row;
    }
};

[[nodiscard]] std::uint8_t solidNeighborMask(const core::TileMap& tiles, int column,
                                             int row) noexcept;

[[nodiscard]] AutotileCell autotileCell(std::uint8_t mask) noexcept;

[[nodiscard]] AutotileCell autotileRepresentativeCell() noexcept;

[[nodiscard]] std::string_view autotileConfigurationLabelKey(std::uint8_t mask) noexcept;

[[nodiscard]] std::array<std::uint8_t, 9> autotileAssemblyMasks() noexcept;
 
}  // namespace hmi