PcgTerrainStreaming.h

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#pragma once
#include "common/Export.h"
 
 
#include "common/PcgPhotoModeApply.h"
#include "procgen/heightmap/TerrainStreaming.h"
 
namespace eve::procgen {
 
enum class PcgTerrainStreamingTier { Regular = 0, Impostor = 1, Unloaded = 2 };
 
struct PcgTerrainStreamingState {
    float regularRange = 1000.f;
    float impostorRange = 2000.f;
    float worldUnitsPerSample = 1.f;
};
 
class EVENGINE_API_DOMAINS PcgTerrainStreamingAuthority final : public IPhotoModeFieldSink {
public:
    ~PcgTerrainStreamingAuthority() override;
 
    [[nodiscard]] Result<void> setTarget(TerrainStreamingCache* cache, float worldUnitsPerSample);
    void setAuthority(bool enabled);
    const PcgTerrainStreamingState& state() const noexcept { return state_; }
    int regularRadiusChunks() const noexcept;
    int impostorRadiusChunks() const noexcept;
    [[nodiscard]] Result<TerrainStreamStats> streamAround(int worldSampleX, int worldSampleY, int maxLoads = 0);
    PcgTerrainStreamingTier tierForDistance(float worldDistance) const noexcept;
 
    PhotoModeFieldAcceptance acceptsPhotoModeField(const PhotoModeAssignment& assignment) const noexcept override;
    [[nodiscard]] Result<void> applyPhotoModeField(const PhotoModeAssignment& assignment) override;
 
private:
    int rangeToChunks(float range) const noexcept;
 
    TerrainStreamingCache* cache_ = nullptr;
    PcgTerrainStreamingState state_{};
    bool authority_ = false;
};
 
}  // namespace eve::procgen