moved code here. still needs to update gh

terrarium_bk/terrarium/game.h

@@ -0,0 +1,67 @@
+/******************************************************************************
+ * game.h
+ * 
+ * Exposes the core game logic and data.
+ ******************************************************************************/
+#ifndef GAME_H
+#define GAME_H
+
+/* 
+ * This header declares functions/data for the Terrarium game.
+ * Include it from both main.c and game.c.
+ */
+
+#define MAX_PLANTS          40
+#define SHELF_COUNT         5      /* We'll display 5 shelves total */
+#define PLANTS_PER_SHELF    8      /* 8 plants per shelf => 40 plants total */
+#define GAME_TICK_INTERVAL_MS 200  /* Loop tick (ms) */
+
+#define BASE_OXYGEN_PER_SECOND 0.1
+#define TAP_BONUS_OXYGEN       1.0
+#define BASE_PLANT_COST        10.0
+#define COST_MULTIPLIER        1.2
+
+/*
+ * Data Structures
+ */
+
+typedef struct {
+    char  name[64];         /* e.g. "Snake Plant" */
+    int   active;           /* 1 if purchased/visible, 0 if not */
+    double productionRate;  /* O2 per second contributed by this plant */
+} Plant;
+
+/* Main Game State container */
+typedef struct {
+    double oxygen;               /* Current total oxygen currency */
+    double plantCost;            /* Cost to buy the next plant */
+    Plant  plants[MAX_PLANTS];   /* All 40 plants */
+    int    plantCount;           /* How many plants are active */
+} GameState;
+
+/*
+ * Function Prototypes
+ */
+
+/* Game lifecycle */
+void initGame(GameState *gs);
+void loadGame(GameState *gs);
+void saveGame(const GameState *gs);
+
+/* Game logic */
+void updateGame(GameState *gs, double elapsedSeconds);
+void renderGame(const GameState *gs);
+void handleInput(GameState *gs, char input);
+
+/* Timing: returns elapsed seconds since last call */
+double getElapsedTime(void);
+
+/* Terminal / I/O helpers */
+void initTermios(int echo);
+void resetTermios(void);
+int  kbhit(void);
+char getch(void);
+void clearScreen(void);
+
+#endif /* GAME_H */
+