DeathDissolveEffect.hpp

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#pragma once
 
#include "particles/ParticleTypes.hpp"
 
#include <cstdint>
#include <glm/glm.hpp>
#include <vector>

class DeathDissolveEffect
{
public:
    void spawn(const std::vector<glm::vec3>& worldPoints, glm::vec3 center, glm::vec4 baseColor);

    void update(float dt);

    [[nodiscard]] const BillboardParticle* data() const { return gpu_.data(); }
    [[nodiscard]] uint32_t count() const { return static_cast<uint32_t>(gpu_.size()); }
 
private:
    struct Particle
    {
        glm::vec3 basePos;  
        glm::vec3 vel;      
        glm::vec4 color;    
        float size = 1.5f;  
        float delay = 0.0f; 
        float age = 0.0f;   
        float fly = 1.5f;   
    };
 
    static constexpr uint32_t k_maxParticles = 30000;
 
    std::vector<Particle> particles_;
    std::vector<BillboardParticle> gpu_; 
};