DiffuseLightProbeRegistry.h

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#pragma once
 
#include "common/ProcgenProbeSink.h"
 
#include <glm/vec3.hpp>
#include <glm/vec4.hpp>
#include <string>
#include <unordered_map>
#include <vector>
 
namespace eve::graphics {
 
struct DiffuseLightProbeSample {
    std::array<glm::vec4, 9> coefficients{};
};
 
struct DiffuseLightProbeVolumeSample {
    static constexpr int kMaxProbes = 8;
    std::array<glm::vec4, kMaxProbes> positions{};
    std::array<glm::vec4, kMaxProbes> extents{};
    std::array<glm::vec4, kMaxProbes * 9> coefficients{};
    int count = 0;
    bool trilinearCell = false;
};
 
class EVENGINE_API_BACKENDS DiffuseLightProbeRegistry {
public:
    static DiffuseLightProbeRegistry& instance();
 
    void replaceBatch(const std::string& batchId, const std::vector<eve::ProcgenProbeDesc>& probes);
    void removeBatch(const std::string& batchId);
    [[nodiscard]] Result<DiffuseLightProbeSample> sample(const glm::vec3& position, int maxSamples) const;
    [[nodiscard]] Result<DiffuseLightProbeVolumeSample> selectVolume(const glm::vec3& position) const;
 
private:
    std::unordered_map<std::string, std::vector<eve::ProcgenProbeDesc>> batches_;
};
 
}  // namespace eve::graphics