FogInteractor.h

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#pragma once
#include "common/Export.h"
 
#include "common/Result.h"
#include "graphics/fog/FogTypes.h"
 
#include <cstddef>
#include <vector>
 
#include <glm/vec3.hpp>
 
namespace eve::graphics::fog {
 
class MacFluidGrid;
 
class EVENGINE_API_WORLD FogInteractor {
public:
    [[nodiscard]] Result<void> setProxies(std::vector<FogSolidProxy> proxies);
 
    [[nodiscard]] std::size_t proxyCount() const noexcept { return proxies_.size(); }
    [[nodiscard]] const FogSolidProxy& proxyAt(std::size_t index) const;
 
    [[nodiscard]] bool isSolidWorld(const glm::vec3& world) const noexcept;
 
    [[nodiscard]] Result<void> applyToGrid(MacFluidGrid& grid, float dt) const;
 
    [[nodiscard]] glm::vec3 clipAdvection(const glm::vec3& startLocal, const glm::vec3& deltaLocal,
                                          const FogWorldBounds& bounds,
                                          const glm::vec3& cellSize) const noexcept;
 
private:
    [[nodiscard]] float signedDistance(const FogSolidProxy& proxy, const glm::vec3& world) const noexcept;
    [[nodiscard]] glm::vec3 closestPoint(const FogSolidProxy& proxy, const glm::vec3& world) const noexcept;
    [[nodiscard]] glm::vec3 surfaceNormal(const FogSolidProxy& proxy, const glm::vec3& world) const noexcept;
 
    std::vector<FogSolidProxy> proxies_;
};
 
}  // namespace eve::graphics::fog