Enemies fire at you

Makefile

@@ -18,9 +18,15 @@ ITCH_CHANNEL_MAC=mac
 run: $(GAME)_linux
 	SKIP_INTRO=1 ./$(GAME)_linux
 
+debug: $(GAME)_linux_dbg
+	SKIP_INTRO=1 gdb ./$(GAME)_linux
+
 $(GAME)_linux: *.c
 	$(CC) *.c $(CFLAGS) -o $(GAME)_linux
 
+$(GAME)_linux_dbg: *.c
+	$(CC) *.c -g $(CFLAGS) -o $(GAME)_linux
+
 $(GAME)_windows.exe: *.c
 	$(WIN_CC) *.c $(WIN_LIB) $(WIN_CFLAGS) -o $(GAME)_windows.exe
 

bullet.c

@@ -14,7 +14,7 @@
 #include "bullet.h"
 #include "entity.h"
 
-Entity *spawn_bullet(Vector2 spawn_at) {
+Entity *spawn_bullet(Vector2 spawn_at, bool from_enemy) {
   Entity *e = malloc(sizeof(Entity));
   e->name = "Bullet";
   e->properties = malloc(sizeof(Entity));
@@ -25,7 +25,8 @@ Entity *spawn_bullet(Vector2 spawn_at) {
   props->position.width = 4;
   props->position.height = 10;
   props->velocity.x = 0;
-  props->velocity.y = -10;
+  props->velocity.y = from_enemy ? 10 : -10;
+  props->from_enemy = from_enemy;
   e->draw = &draw_bullet;
   e->tick = &tick_bullet;
   e->free = &free_bullet;
@@ -34,10 +35,10 @@ Entity *spawn_bullet(Vector2 spawn_at) {
 
 void draw_bullet(Entity *e) {
   BulletProperties *props = e->properties;
-  DrawRectangleRec(props->position, BLACK);
+  DrawRectangleRec(props->position, props->from_enemy ? RED : BLACK);
 }
 
-void tick_bullet(Entity *e, float dt) {
+void tick_bullet(Game *g, Entity *e, float dt) {
   BulletProperties *props = e->properties;
   e->timer -= dt;
   props->position.y += props->velocity.y;

bullet.h

@@ -12,15 +12,17 @@
 #include <raylib.h>
 
 #include "entity.h"
+#include "game.h"
 
 typedef struct BulletProperties {
   Rectangle position;
   Vector2 velocity;
+  bool from_enemy;
 } BulletProperties;
 
-Entity *spawn_bullet(Vector2 spawn_at);
+Entity *spawn_bullet(Vector2 spawn_at, bool from_enemy);
 void draw_bullet(Entity *e);
-void tick_bullet(Entity *e, float dt);
+void tick_bullet(Game *g, Entity *e, float dt);
 void free_bullet(Entity *e);
 
 #endif

enemy.c

@@ -26,6 +26,7 @@ Entity *spawn_enemy(void) {
   props->position.height = 25;
   props->velocity.x = 3;
   props->velocity.y = 0;
+  props->bullet_timer = rand() % 4;
   e->draw = &draw_enemy;
   e->tick = &tick_enemy;
   e->free = &free_enemy;
@@ -37,7 +38,7 @@ void draw_enemy(Entity *e) {
   DrawRectangleRec(props->position, RED);
 }
 
-void tick_enemy(Entity *e, float dt) {
+void update_position_enemy(Entity *e, float dt) {
   EnemyProperties *props = e->properties;
   if (props->position.x < 200) props->velocity.x = 3;
   if (props->position.x > 600) props->velocity.x = -3;
@@ -45,6 +46,17 @@ void tick_enemy(Entity *e, float dt) {
   props->position.x += props->velocity.x;
 }
 
+void tick_enemy(Game *g, Entity *e, float dt) {
+  EnemyProperties *props = e->properties;
+  update_position_enemy(e, dt);
+  props->bullet_timer -= dt;
+  if (props->bullet_timer < 0.) {
+    props->bullet_timer = (float)(rand() % 4);
+
+    add_entity(g->bullets, spawn_bullet((Vector2) { props->position.x, props->position.y }, true));
+  }
+}
+
 void free_enemy(Entity *e) {
   free(e->properties);
   free(e);

enemy.h

@@ -12,15 +12,18 @@
 #include <raylib.h>
 
 #include "entity.h"
+#include "bullet.h"
+#include "game.h"
 
 typedef struct EnemyProperties {
   Rectangle position;
   Vector2 velocity;
+  float bullet_timer;
 } EnemyProperties;
 
 Entity *spawn_enemy(void);
 void draw_enemy(Entity *e);
-void tick_enemy(Entity *e, float dt);
+void tick_enemy(Game *g, Entity *e, float dt);
 void free_enemy(Entity *e);
 
 #endif

entity.h

@@ -17,12 +17,14 @@
 typedef struct Entity Entity;
 typedef struct Entities Entities;
 
+#include "game.h"
+
 struct Entity {
   char *name;
   void *properties;
   float timer;
   void (*draw)(Entity *e);
-  void (*tick)(Entity *e, float dt);
+  void (*tick)(Game *g, Entity *e, float dt);
   void (*free)(Entity *e);
 };
 

game.c

@@ -63,18 +63,25 @@ void handle_input(Game *g) {
     add_entity(g->enemies, spawn_enemy());
   }
   if (IsKeyPressed(KEY_SPACE)) {
-    add_entity(g->bullets, spawn_bullet(g->player->position));
+    add_entity(g->bullets, spawn_bullet(g->player->position, false));
   }
 }
 
 void process_bullet_collisions(Game *g, Entity *bullet) {
-  FOREACH_ENEMY {
+  BulletProperties *bullet_props = bullet->properties;
-    INIT_ENEMY;
+  Rectangle bullet_rec = bullet_props->position;
-    Rectangle bullet_rec = ((BulletProperties*)bullet->properties)->position;
+  if (bullet_props->from_enemy) {
-    Rectangle enemy_rec = ((EnemyProperties*)e->properties)->position;
+    if (CheckCollisionPointRec(g->player->position, bullet_rec)) {
-    if (CheckCollisionRecs(bullet_rec, enemy_rec)) {
       remove_entity(g->bullets, bullet);
-      remove_entity(g->enemies, e);
+    }
+  } else {
+    FOREACH_ENEMY {
+      INIT_ENEMY;
+      Rectangle enemy_rec = ((EnemyProperties*)e->properties)->position;
+      if (CheckCollisionRecs(bullet_rec, enemy_rec)) {
+	remove_entity(g->bullets, bullet);
+	remove_entity(g->enemies, e);
+      }
     }
   }
 }
@@ -88,16 +95,17 @@ void run_frame(Game *g) {
       remove_entity(g->enemies, e);
       continue;
     }
-    e->tick(e, GetFrameTime());
+    e->tick(g, e, GetFrameTime());
   }
 
   FOREACH_BULLET {
     INIT_BULLET;
+
     if (entity_expired(e)) {
       remove_entity(g->bullets, e);
       continue;
     }
-    e->tick(e, GetFrameTime());
+    e->tick(g, e, GetFrameTime());
     process_bullet_collisions(g, e);
   }
 }

game.h

@@ -11,11 +11,13 @@
 #ifndef GAME_H
 #define GAME_H
 
+typedef struct Game Game;
+
 #include <stdlib.h>
 #include "player.h"
 #include "entity.h"
 
-typedef struct Game {
+struct Game {
   Player *player;
   Entities *enemies;
   Entities *bullets;
@@ -23,9 +25,10 @@ typedef struct Game {
   Levels levels;
   */
   bool should_close;
-} Game;
+};
 
 void initialize_game(Game *g);
 void run_until_closing(Game *g);
+void add_entity(Entities *entities, Entity *e);
 
 #endif

player.h

@@ -10,6 +10,8 @@
 #ifndef PLAYER_H
 #define PLAYER_H
 
+#include <raylib.h>
+
 #define ACCEL_X 0.7
 #define MAX_VEL_X 5
 #define DAMPING_X 0.85