Abstract engine and drawing logic apart from one another. Keep gamestate in a struct

2014-12-05 10:27:25 +13:00
parent 2195f44005
commit 387f37a64a
3 changed files with 444 additions and 0 deletions
@@ -0,0 +1,46 @@
+#ifndef _2048_ENGINE
+#define _2048_ENGINE
+
+#include <stdio.h>
+
+#define fatal(msg) do { fprintf(stderr, "line %d: %s\n", __LINE__, msg); abort(); } while (0)
+
+typedef enum {
+    dir_left  = 'h',
+    dir_right = 'l',
+    dir_up    = 'k',
+    dir_down  = 'j'
+} direction;
+
+struct gameoptions {
+    size_t grid_height;
+    size_t grid_width;
+    long goal;
+    long spawn_value;
+    int spawn_rate;
+};
+
+struct gamestate {
+    /* Game state */
+    long **grid;
+    int moved;
+    long score;
+    long score_high;
+    long score_last;
+    int print_width;
+    /* Options */
+    struct gameoptions *opts;
+    /* Draw functions */
+    void (*ds_draw)(struct gamestate*);
+    void (*ds_clear)(void);
+};
+
+void gravitate(struct gamestate*, direction, void (*callback)(struct gamestate*));
+void merge(struct gamestate*, direction, void (*callback)(struct gamestate*));
+int  moves_available(struct gamestate *);
+void random_block(struct gamestate *);
+int  gamestate_tick(struct gamestate*, direction, void (*callback)(struct gamestate*));
+void gamestate_clear(struct gamestate*);;
+struct gamestate*   gamestate_init(struct gameoptions *);
+struct gameoptions* gameoptions_default(void);
+#endif