Updated game structure

src/gameplay/LineEffect.h

@@ -0,0 +1,71 @@
+// LineEffect.h - Line clearing visual and audio effects
+#pragma once
+#include <SDL3/SDL.h>
+#include <vector>
+#include <random>
+
+class LineEffect {
+public:
+    struct Particle {
+        float x, y;
+        float vx, vy;
+        float size;
+        float alpha;
+        SDL_Color color;
+        
+        Particle(float px, float py);
+        void update();
+        void render(SDL_Renderer* renderer);
+        bool isAlive() const { return alpha > 0.0f; }
+    };
+
+    enum class AnimationState {
+        IDLE,
+        FLASH_WHITE,
+        EXPLODE_BLOCKS,
+        BLOCKS_DROP
+    };
+
+    LineEffect();
+    ~LineEffect();
+    
+    bool init(SDL_Renderer* renderer);
+    void shutdown();
+    
+    // Start line clear effect for the specified rows
+    void startLineClear(const std::vector<int>& rows, int gridX, int gridY, int blockSize);
+    
+    // Update and render the effect
+    bool update(float deltaTime); // Returns true if effect is complete
+    void render(SDL_Renderer* renderer, int gridX, int gridY, int blockSize);
+    
+    // Audio
+    void playLineClearSound(int lineCount);
+    
+    bool isActive() const { return state != AnimationState::IDLE; }
+
+private:
+    SDL_Renderer* renderer{nullptr};
+    AnimationState state{AnimationState::IDLE};
+    float timer{0.0f};
+    std::vector<int> clearingRows;
+    std::vector<Particle> particles;
+    std::mt19937 rng{std::random_device{}()};
+    
+    // Audio resources
+    SDL_AudioStream* audioStream{nullptr};
+    std::vector<int16_t> lineClearSample;
+    std::vector<int16_t> tetrisSample;
+    
+    // Animation timing - Flash then immediate explosion effect
+    static constexpr float FLASH_DURATION = 0.12f;   // Very brief white flash
+    static constexpr float EXPLODE_DURATION = 0.15f; // Quick explosive effect
+    static constexpr float DROP_DURATION = 0.05f;    // Almost instant block drop
+    
+    void createParticles(int row, int gridX, int gridY, int blockSize);
+    void updateParticles();
+    void renderFlash(int gridX, int gridY, int blockSize);
+    void renderExplosion();
+    bool loadAudioSample(const std::string& path, std::vector<int16_t>& sample);
+    void initAudio();
+};