Culler.hpp

#pragma once
 
#include "Common.hpp"
#include "scene/Object.hpp"
 
class Culler {
 
public:
 
    using List = std::vector<long>; 
 
    Culler(const std::vector<Object> & objects);
 
    const List & cull(const glm::mat4 & view, const glm::mat4 & proj);
 
    const List & cullAndSort(const glm::mat4 & view, const glm::mat4 & proj, const glm::vec3 & pos);
 
    void interface();
 
    Culler & operator=(const Culler &) = delete;
    
    Culler(const Culler &) = delete;
    
    Culler & operator=(Culler &&) = delete;
    
    Culler(Culler &&) = delete;
 
private:
 
    enum class Ordering {
        FRONT_TO_BACK, 
        BACK_TO_FRONT  
    };
 
    const std::vector<Object> & _objects; 
    List _order; 
 
    struct DistPair {
        long id = -1; 
        double distance = std::numeric_limits<double>::max(); 
        long material = -1; 
    };
    std::vector<DistPair> _distances; 
 
    Frustum _frustum; 
    unsigned long _maxCount; 
    bool _freezeFrustum = false; 
 
};