HexFeatures.h

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#pragma once
#include "common/Export.h"
 
 
#include "hexmap/HexMap.h"
#include "hexmap/HexMeshData.h"
#include "hexmap/HexMetrics.h"
 
#include <cstdint>
 
namespace eve::hexmap {
 
struct HexHash {
    float a = 0.f;
    float b = 0.f;
    float c = 0.f;
    float d = 0.f;
    float e = 0.f;
};
 
class EVENGINE_API_WORLD HexHashGrid {
public:
    static constexpr float kScale = 0.25f;
    static constexpr std::int32_t kSize = 256;
 
    explicit HexHashGrid(std::uint32_t seed = 0u) noexcept : seed_(seed) {}
 
    [[nodiscard]] HexHash sample(HexVec3 position) const noexcept;
 
private:
    std::uint32_t seed_ = 0u;
};
 
[[nodiscard]] EVENGINE_API_WORLD float featureThreshold(std::int32_t level, std::int32_t index) noexcept;
 
inline constexpr std::int32_t kFeatureThresholdCount = 3;
 
inline constexpr float kWallTowerThreshold = 0.5f;
inline constexpr float kBridgeDesignLength = 7.f;
 
EVENGINE_API_WORLD void buildWallMesh(const HexMap& map, std::int32_t chunkIndex, HexMeshData& out);
 
EVENGINE_API_WORLD void buildFeatureMesh(const HexMap& map, std::int32_t chunkIndex, HexMeshData& out);
 
}  // namespace eve::hexmap