Shaping out the games structure

include/camera.h

@@ -0,0 +1,16 @@
+#ifndef _DEF_CAMERA
+#define _DEF_CAMERA
+
+#include "vec.h"
+
+typedef struct Camera
+{
+	Vec position;
+	Vec *follow; /* the target position to lerp on */
+	float speed; /* camera lerp speed with 0 < speed <= 1 */
+} Camera;
+
+void camera_step(Camera *camera);
+/* camera is invisible */
+
+#endif /* _DEF_CAMERA */

include/level.h

@@ -0,0 +1,16 @@
+#ifndef _DEF_LEVEL
+#define _DEF_LEVEL
+
+#include "camera.h"
+
+typedef struct Level
+{
+	unsigned char tiles[64 * 64]; /* max level size */
+	unsigned int width;  /* in tiles */
+	unsigned int height; /* in tiles */
+} Level;
+
+void level_step(Level *level);
+void level_draw(Level *level, Camera *camera);
+
+#endif /* _DEF_LEVEL */

include/main.h

@@ -0,0 +1,10 @@
+#include "player.h"
+#include "level.h"
+
+#ifndef _DEF_MAIN
+#define _DEF_MAIN
+
+void step_event(Player *player, Level *level, Camera *camera);
+void draw_event(Player *player, Level *level, Camera *camera);
+
+#endif

include/player.h

@@ -2,13 +2,14 @@
 #define _DEF_PLAYER
 
 #include "vec.h"
+#include "camera.h"
 
 typedef struct Player
 {
 	Vec position;
 } Player;
 
-/* draw the player */
-void draw_player(Player *player);
+void player_step(Player *player);
+void player_draw(Player *player, Camera *camera);
 
-#endif
+#endif /* _DEF_PLAYER */

include/vec.h

@@ -13,4 +13,4 @@ void vec_add(Vec *vector, Vec force);
 /* apply the opposite of a force on a vector */
 void vec_sub(Vec *vector, Vec force);
 
-#endif
+#endif /* _DEF_VEC */

src/camera.c

@@ -0,0 +1,5 @@
+#include "camera.h"
+
+void camera_step(Camera *camera)
+{
+}

src/level.c

@@ -0,0 +1,11 @@
+#include "level.h"
+#include "camera.h"
+
+void level_step(Level *level)
+{
+}
+
+void level_draw(Level *level, Camera *camera)
+{
+    /* TODO */
+}

src/main.c

@@ -1,8 +1,13 @@
 #include <gint/display.h>
 #include <gint/keyboard.h>
+#include <gint/std/string.h>
+
+#include "main.h"
 #include "init.h"
 #include "vec.h"
 #include "player.h"
+#include "level.h"
+#include "camera.h"
 
 int main(void)
 {
@@ -13,10 +18,38 @@ int main(void)
 		.position = (Vec){32, 32}
 	};
 	
-	dclear(C_WHITE);
-	draw_player(&player);
-	dupdate();
+	/* create level */
+	Level level = {
+		.width = 0,
+		.height = 0
+	};
+
+	/* create camera */
+	Camera camera = {
+		.follow = &player.position
+	};
+	camera.position.x = player.position.x;
+	camera.position.y = player.position.y;
+
+	/* main game loop */
+	step_event(&player, &level, &camera);
+	draw_event(&player, &level, &camera);
 
 	getkey();
 	return 1;
 }
+
+void step_event(Player *player, Level *level, Camera *camera)
+{
+	player_step(player);
+	level_step(level);
+	camera_step(camera);
+}
+
+void draw_event(Player *player, Level *level, Camera *camera)
+{
+	dclear(C_WHITE);
+	level_draw(level, camera);
+	player_draw(player, camera);
+	dupdate();
+}

src/player.c

@@ -1,7 +1,13 @@
-#include "player.h"
 #include <gint/display.h>
 
-void draw_player(Player *player)
+#include "player.h"
+#include "camera.h"
+
+void player_step(Player *player)
+{
+}
+
+void player_draw(Player *player, Camera *camera)
 {
     dpixel(player->position.x, player->position.y, C_BLACK);
 }