HexVisibility.h

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#pragma once
#include "common/Export.h"
 
 
#include "common/Result.h"
#include "hexmap/HexSearch.h"
 
#include <cstdint>
#include <vector>
 
namespace eve::hexmap {
 
class EVENGINE_API_WORLD HexVisibility {
public:
    HexVisibility() = default;
 
    void reset(std::int32_t cellCount);
 
    [[nodiscard]] std::int32_t cellCount() const noexcept { return static_cast<std::int32_t>(counts_.size()); }
 
    [[nodiscard]] bool isVisible(std::int32_t cellIndex) const noexcept;
    [[nodiscard]] std::int32_t visibility(std::int32_t cellIndex) const noexcept;
    [[nodiscard]] std::int32_t visibleCellCount() const noexcept;
 
    [[nodiscard]] Result<void> increase(HexMap& map, HexSearchContext& scratch, HexCoordinates from,
                                        std::int32_t range);
 
    [[nodiscard]] Result<void> decrease(HexMap& map, HexSearchContext& scratch, HexCoordinates from,
                                        std::int32_t range);
 
    void clear(HexMap& map) noexcept;
 
private:
    std::vector<std::int32_t> counts_;
    std::vector<std::int32_t> touched_;
};
 
}  // namespace eve::hexmap