light_data.h

#pragma once
 
#include <cstdint>
#include <vector>
 
#include <glm/glm.hpp>
 
#include "ecs/component/render/light.h"
 
namespace Vkm::Engine {

struct LightData {
    LightType type;

    uint32_t  entitySlot = 0;
    glm::vec3 color;
    float     intensity;
    glm::vec3 position;
 
    glm::vec3 direction;    
 
    float radius;           
 
    float innerConeAngle;   
    float outerConeAngle;   
 
    // Area-light fields, zero for punctual lights.
    glm::vec3 axisU{0.0f};  
    glm::vec3 axisV{0.0f};  
    bool      twoSided;     
 
    bool  castShadows;
    float shadowBias;       
    float shadowNormalBias; 
    float shadowDistance;   

    float sourceRadius = 0.0f;
};

inline const LightData* lowestSlotDirectional(const std::vector<LightData>& lights) {
    const LightData* key = nullptr;
    for (const LightData& light : lights) {
        if (light.type != LightType::Directional) continue;
        if (!key || light.entitySlot < key->entitySlot) key = &light;
    }
    return key;
}
 
} // namespace Vkm::Engine