Enemies shoot back!

c/CTheEscape

@@ -55,6 +55,8 @@ struct NPC_s {
   int collideforce;
   int collidable;
   int explodenextframe;
+  int nextfire;
+  int fireinterval;
 };
 
 struct Star_s {
@@ -70,6 +72,7 @@ struct Player_s {
   unsigned char velocity;
   int nextidlesprite;
   int shields;
+  int nextshieldheal;
   int integrity;
   int remainingdistance;
   struct EntityLocation_s hitbox_bl;
@@ -172,6 +175,51 @@ void intro()
   }
 }
 
+void game_spawn_projectile(int id, int Px, int Py, int Vx, int Vy,enum sprite_e sprite, int damage)
+{
+  int i;
+  
+  if(id < 0)
+  {
+    for(i = 0; i < MAX_PROJECTILES; i++)
+    {
+        if(Projectiles[i].active == 0)
+          id = i;
+    }
+  }
+
+  // If no velocity X specified we're targetting the player
+  if(Vx == 0)
+  {
+    int Xdistance = abs((Player.location.X + (Player.hitbox_tr.X/2)) - Px);
+    int Ydistance = abs((Player.location.Y + (Player.hitbox_tr.Y/2)) - Py);
+    int distance = sqrt((Xdistance^2) + (Ydistance^2));
+    Vx = Xdistance / (distance / 10);
+    Vy = Ydistance / (distance / 10);
+    if(Player.location.X > Px)
+      Vx = 0 - Vx;
+  }
+
+  // If it's too close to horizontal you can't dodge
+  if(Vy < 2)
+    id = -1;
+  
+  //If no free IDs then we go without
+  if(id >= 0)
+  {
+    Projectiles[id].location.X = Px;
+    Projectiles[id].location.Y = Py;
+    Projectiles[id].velocity.X = Vx;
+    Projectiles[id].velocity.Y = Vy;
+    Projectiles[id].active = 1;
+    Projectiles[id].sprite = sprite;
+    Projectiles[id].nextframe = tick + 10;
+    Projectiles[id].damage = damage;
+    Projectiles[id].collidable = 1;
+  }
+
+}
+
 void game_draw_player()
 {
   draw_sprite(sprites[Player.sprite], Player.location.X, Player.location.Y);
@@ -340,6 +388,8 @@ void game_respawn_npc(int id)
   NPCS[id].location.Y = DISPLAY_Y + (rand() % (DISPLAY_Y/2));
   NPCS[id].npctype = rand() % (maxnpctype);
   NPCS[id].collidable = 1;
+  NPCS[id].fireinterval = 200;
+  NPCS[id].nextfire = tick + (rand() % 100);
     switch(NPCS[id].npctype)
     {
       case bigdurno:
@@ -362,7 +412,7 @@ void game_respawn_npc(int id)
         NPCS[id].hitbox_bl.Y = 0;
         NPCS[id].hitbox_tr.X = 38;
         NPCS[id].hitbox_tr.Y = 56;
-        NPCS[id].collideforce = 30;
+        NPCS[id].collideforce = 50;
         break;
     };
 }
@@ -392,6 +442,13 @@ void game_tick_npcs()
     
     if((NPCS[i].location.X + NPCS[i].hitbox_bl.X) < 0)
       game_respawn_npc(i);
+    if(tick > NPCS[i].nextfire)
+    {
+      // Dont fire if off screen
+      if((NPCS[i].location.Y < DISPLAY_Y))
+        game_spawn_projectile(-1,NPCS[i].location.X, NPCS[i].location.Y, 0, NPCS[i].velocity.Y, photon1, 30);
+      NPCS[i].nextfire = tick + NPCS[i].fireinterval;
+    }
   }
 }
 
@@ -489,6 +546,32 @@ void game_collider_tick()
       }
     }
   }
+
+  for(i = 0; i < MAX_PROJECTILES; i++)
+  {
+    if(!Projectiles[i].active)
+      continue;
+    if(!NPCS[i].collidable)
+      continue;
+    // Excuse this formatting
+    if(
+      game_hitbox_collide(
+        (Player.location.X + Player.hitbox_bl.X),(Player.location.Y + Player.hitbox_bl.Y),
+        (Player.hitbox_tr.X - Player.hitbox_bl.X),(Player.hitbox_tr.Y - Player.hitbox_bl.Y),
+        Projectiles[i].location.X,Projectiles[i].location.Y,
+        10,10
+      )
+    )
+    {
+      Projectiles[i].active = 0;
+      Player.shields -= Projectiles[i].damage;
+      if(Player.shields < 0)
+      {
+        Player.integrity += Player.shields;
+        Player.shields = 0;
+      }
+    }
+  }
 }
 
 int game_hitbox_collide(int x1, int y1, int w1, int h1, int x2, int y2, int w2, int h2)
@@ -532,46 +615,7 @@ void game_projectiles_tick()
   }
 }
 
-void game_spawn_projectile(int id,int Px,int Py, int Vx,int Vy,enum sprite_e sprite, int damage)
-{
-  int i;
-  
-  if(id < 0)
-  {
-    for(i = 0; i < MAX_PROJECTILES; i++)
-    {
-        if(Projectiles[i].active == 0)
-          id = i;
-    }
-  }
 
-  // If no velocity X specified we're targetting the player
-  if(Vx == 0)
-  {
-    int Xdistance = abs(Player.location.X - Px);
-    int Ydistance = abs(Player.location.Y - Py);
-    int distance = sqrt((Xdistance^2) + (Ydistance^2));
-    Vx = Xdistance / (distance / 10);
-    Vy = Ydistance / (distance / 10);
-    if(Player.location.X > Px)
-      Vx = 0 - Vx;
-  }
-
-  //If no free IDs then we go without
-  if(id >= 0)
-  {
-    Projectiles[id].location.X = Px;
-    Projectiles[id].location.Y = Py;
-    Projectiles[id].velocity.X = Vx;
-    Projectiles[id].velocity.Y = Vy;
-    Projectiles[id].active = 1;
-    Projectiles[id].sprite = sprite;
-    Projectiles[id].nextframe = tick + 10;
-    Projectiles[id].damage = damage;
-    Projectiles[id].collidable = 1;
-  }
-
-}
 
 void game_input_tick()
 {
@@ -685,6 +729,15 @@ void game_setup()
 void game_tick_player()
 {
   Player.remainingdistance -= Player.velocity * (tick - lasttick);
+
+  if(Player.shields < 100)
+  {
+    if(tick > Player.nextshieldheal)
+    {
+      Player.shields += 1;
+      Player.nextshieldheal = tick + 10;
+    }
+  }
 }
 
 void game_tick()