SpawnSlots.h

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#ifndef BOMBERMAN_SIM_SPAWNSLOTS_H
#define BOMBERMAN_SIM_SPAWNSLOTS_H
 
#include <array>
#include <cstddef>
#include <cstdint>
 
#include "Sim/Movement.h"
 
namespace bomberman::sim
{
    constexpr uint8_t kLeftSpawnCol = 1;
    constexpr uint8_t kRightSpawnCol = static_cast<uint8_t>(tileArrayWidth - 2);
    constexpr uint8_t kTopSpawnRow = 1;
    constexpr uint8_t kBottomSpawnRow = 9;
 
    struct SpawnSlotCell
    {
        uint8_t col = 0;
        uint8_t row = 0;
    };
 
    constexpr std::array<SpawnSlotCell, 4> kDefaultSpawnSlots{{
        {kLeftSpawnCol, kTopSpawnRow},
        {kLeftSpawnCol, kBottomSpawnRow},
        {kRightSpawnCol, kTopSpawnRow},
        {kRightSpawnCol, kBottomSpawnRow},
    }};
 
    static_assert(baseTiles[kTopSpawnRow][kLeftSpawnCol] == Tile::EmptyGrass, "Top-left spawn must stay clear");
    static_assert(baseTiles[kBottomSpawnRow][kLeftSpawnCol] == Tile::EmptyGrass, "Bottom-left spawn must stay clear");
    static_assert(baseTiles[kTopSpawnRow][kRightSpawnCol] == Tile::EmptyGrass, "Top-right spawn must stay clear");
    static_assert(baseTiles[kBottomSpawnRow][kRightSpawnCol] == Tile::EmptyGrass, "Bottom-right spawn must stay clear");
 
    [[nodiscard]]
    constexpr SpawnSlotCell spawnSlotCellForPlayerId(const uint8_t playerId)
    {
        return kDefaultSpawnSlots[static_cast<std::size_t>(playerId) % kDefaultSpawnSlots.size()];
    }
 
    [[nodiscard]]
    constexpr TilePos spawnSlotTilePos(const SpawnSlotCell slot)
    {
        return {
            static_cast<int32_t>(slot.col) * 256 + 128,
            static_cast<int32_t>(slot.row) * 256 + 128
        };
    }
 
    [[nodiscard]]
    constexpr TilePos spawnTilePosForPlayerId(const uint8_t playerId)
    {
        return spawnSlotTilePos(spawnSlotCellForPlayerId(playerId));
    }
 
} // namespace bomberman::sim
 
#endif // BOMBERMAN_SIM_SPAWNSLOTS_H