update particles garbage collection scheme

src/graphics/render/ParticlesRenderer.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <vector>
+#include <memory>
 #include <unordered_map>
 
 #include "Emitter.hpp"
@@ -12,13 +13,15 @@ class MainBatch;
 
 class ParticlesRenderer {
     std::unordered_map<const Texture*, std::vector<Particle>> particles;
-    std::vector<Emitter> emitters;
+    std::vector<std::unique_ptr<Emitter>> emitters;
     std::unique_ptr<MainBatch> batch;
+
+    void renderParticles(const Camera& camera, float delta);
 public:
     ParticlesRenderer(const Assets& assets);
     ~ParticlesRenderer();
 
-    void render(const Assets& assets, const Camera& camera, float delta);
+    void render(const Camera& camera, float delta);
 
     static size_t visibleParticles;
     static size_t aliveEmitters;