Add coin animation

mario/blocks.hpp

@@ -34,6 +34,11 @@ public:
     void setCoinCount( int coins );
     void setDestructible( bool destructible = true );
     void ensureCollision();
+    bool isBouncing();
+
+protected:
+    double bounce_speed = 0.5;
+    int bounce_ticks = 100;
 
 private:
     bool _tool = false;
@@ -43,8 +48,8 @@ private:
     bool _bouncing = false;
     int _coins = 0;
     bool _mushroom = false;
-    const int bounce_ticks = 100;
-    int ticks_to_bounce = bounce_ticks;
+    bool _release_coin = false;
+    int ticks_to_bounce = 0;
     SDLPP::Vec2D< double > og_pos = {};
     LandType::Value _type;
     SDL_Rect _base_src;