SkyRuntime.h

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#pragma once
#include <array>
#include <memory>
#include "common/Export.h"
#include "daynight/sky/SkyTimeline.h"
 
namespace eve::graphics {
class Graphics;
struct SkyAtmosphereParameters;
struct SkyWispsLayer;
}  // namespace eve::graphics
namespace eve::daynight {
struct SkyCloudMotion {
    double phase = 0, speed = 0, timeScale = 1, windMultiplier = 1;
    [[nodiscard]] EVENGINE_API_WORLD Result<void> validate() const;
};
struct SkyRuntimeSettings {
    SkyClock             clock;
    SkyWeather           weather;
    SkyCloudMotion       cloudMotion;
    double               sunPitchDegrees = 30;
    double               sunYawDegrees   = 0;
    std::array<float, 3> sunIrradiance{5, 5, 5};
};
struct SkyRuntimeFrame {
    SkyFrame              simulation;
    double                cloudTime       = 0;
    float                 wispsMorphPhase = 0;
    std::array<double, 3> sunDirection{};
    std::array<float, 3>  sunIrradiance{};
};
class EVENGINE_API_WORLD SkyRuntime {
public:
    [[nodiscard]] static Result<std::unique_ptr<SkyRuntime>> prepare(
        graphics::Graphics& graphics, const SkyRuntimeSettings& settings,
        const graphics::SkyAtmosphereParameters& atmosphere, const graphics::SkyWispsLayer* wisps = nullptr);
    ~SkyRuntime();
    SkyRuntime(const SkyRuntime&)            = delete;
    SkyRuntime& operator=(const SkyRuntime&) = delete;
    [[nodiscard]] Result<void> advance(Duration duration);
    [[nodiscard]] Result<void> transitionTo(const SkyWeather& target, Duration duration);
    [[nodiscard]] SkyRuntimeFrame frame() const noexcept;
    [[nodiscard]] Result<void> attach();
    void detach() noexcept;
 
private:
    SkyRuntime();
    struct Impl;
    std::unique_ptr<Impl> impl_;
};
}  // namespace eve::daynight