ShadowMap.hpp

#pragma once
 
#include "processing/BoxBlur.hpp"
#include "resources/Texture.hpp"
 
#include "Common.hpp"
 
class Scene;
 
enum class ShadowMode : int {
    NONE     = 0, 
    BASIC    = 1, 
    PCF      = 2, 
    VARIANCE = 3  
};
 
class ShadowMap {
public:
    ShadowMap() = default;
    
    virtual void draw(const Scene & scene) = 0;
    
    virtual ~ShadowMap() = default;
    
    ShadowMap(const ShadowMap &) = delete;
    
    ShadowMap & operator=(const ShadowMap &) = delete;
    
    ShadowMap(ShadowMap &&) = default;
    
    ShadowMap & operator=(ShadowMap &&) = delete;
 
    struct Region {
        const Texture * map = nullptr; 
        ShadowMode mode = ShadowMode::NONE; 
        glm::vec2 minUV = glm::vec2(0.0f); 
        glm::vec2 maxUV = glm::vec2(0.0f); 
        size_t layer = 0; 
        float bias = 0.002f; 
    };
 
};