From 2d2379251e71b5f315235db7980d0cfe03132561 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Thu, 29 Jun 2023 21:47:55 +0100
Subject: Add pickaxe pickup

---
 src/game.c   | 37 +++++++++++++++++++++++++++++++++++--
 src/game.h   |  4 +++-
 src/map.c    | 11 +++--------
 src/pickup.c | 24 ++++++++++++++++++------
 src/pickup.h |  1 +
 src/player.c | 12 ++++++++----
 6 files changed, 68 insertions(+), 21 deletions(-)

(limited to 'src')

diff --git a/src/game.c b/src/game.c
index 70b1e74..64a7b23 100644
--- a/src/game.c
+++ b/src/game.c
@@ -16,12 +16,14 @@
 #define GAME_LIVES_START    3
 #define GAME_LIVES_MAX      9
 #define GAME_TIME_MAX       60
+#define GAME_MAX_PICKAXE    3
 
 #define HUD_CLEAN   0
 #define HUD_LIVES   1
 #define HUD_SCORE   2
 #define HUD_STAGE   4
 #define HUD_TIME    8
+#define HUD_PICKAXE 16
 #define HUD_ALL     255
 
 #define GAMEOVER_DELAY 96
@@ -35,8 +37,8 @@ static volatile uint8_t clock_updated;
 static uint8_t lives;
 static uint32_t score;
 static uint8_t stage;
-static uint8_t gold;
 static uint8_t time;
+static uint8_t pickaxe;
 static uint8_t gameover;
 
 static void hud_render()
@@ -51,6 +53,11 @@ static void hud_render()
         /* lives */
         blitrc(binary_sprites_start, &src, &dst);
 
+        /* pickaxe */
+        src.x = 112;
+        dst.x = 90;
+        blitrc(binary_sprites_start, &src, &dst);
+
         put_text(132, 4, "TIME", 1);
         put_text(249, 4, "STAGE", 1);
     }
@@ -67,6 +74,12 @@ static void hud_render()
         put_text(34, 4, b, 5);
     }
 
+    if (hud & HUD_PICKAXE)
+    {
+        sprintf(b, "%d", pickaxe);
+        put_text(106, 4, b, 1);
+    }
+
     if (hud & HUD_TIME)
     {
         sprintf(b, "%02d", time);
@@ -105,7 +118,7 @@ void run_game()
     lives = GAME_LIVES_START;
     score = 0;
     stage = 0;
-    gold = 30;
+    pickaxe = 0;
     time = GAME_TIME_MAX;
 
     hud = HUD_ALL;
@@ -191,3 +204,23 @@ void reset_time()
     hud |= HUD_TIME;
     timer_start(GAME_TIME_MAX, &clock_updated);
 }
+
+void add_pickaxe()
+{
+    if (pickaxe < GAME_MAX_PICKAXE)
+    {
+        pickaxe++;
+        hud |= HUD_PICKAXE;
+    }
+}
+
+uint8_t use_pickaxe()
+{
+    if (pickaxe)
+    {
+        pickaxe--;
+        hud |= HUD_PICKAXE;
+        return 1;
+    }
+    return 0;
+}
diff --git a/src/game.h b/src/game.h
index 5a13927..ea01495 100644
--- a/src/game.h
+++ b/src/game.h
@@ -2,10 +2,12 @@
 #define _GAME_H
 
 void run_game();
+
 void add_score(uint8_t v);
 uint32_t get_hiscore();
-
 uint8_t dec_lives();
 void reset_time();
+void add_pickaxe();
+uint8_t use_pickaxe();
 
 #endif /* _GAME_H */
diff --git a/src/map.c b/src/map.c
index cf25426..d34a5a9 100644
--- a/src/map.c
+++ b/src/map.c
@@ -14,12 +14,6 @@
 
 #include "map.h"
 
-typedef enum
-{
-    Player = 0,
-    Snake,
-} EntityType;
-
 /* current map; set via map_init */
 static const uint8_t *cmap;
 static uint8_t gold[MAP_W * MAP_H];
@@ -31,6 +25,7 @@ static void (* const init[])(Entity *) =
     bat_init,
     pickup_time_init,
     pickup_bonus_init,
+    pickup_pickaxe_init,
 };
 
 void map_init(const uint8_t map[])
@@ -58,8 +53,8 @@ void map_init(const uint8_t map[])
         ent += 4
     )
     {
-        /* the player is not part of the entity system */
-        if (*ent == Player)
+        /* the player (entity 0) is not part of the entity system */
+        if (*ent == 0)
         {
             player_init(ent[1] * MAP_TILE_W, ent[2] * MAP_TILE_H, ent[3] & 1);
             continue;
diff --git a/src/pickup.c b/src/pickup.c
index 6b53cda..e1ad424 100644
--- a/src/pickup.c
+++ b/src/pickup.c
@@ -44,7 +44,7 @@ static const Rect frames[2 * 4] =
     { 80, 16, 144, 144 },
 
     /* pickaxe */
-    { 16, 32, 144, 144 },
+    { 64, 16, 144, 144 },
 
     /* gold key */
     { 0, 0, 144, 144 },
@@ -122,6 +122,14 @@ void pickup_bonus_init(Entity *e)
     e->update = pickup_wait_update;
 }
 
+void pickup_pickaxe_init(Entity *e)
+{
+    e->frames = (const Rect *)frames_in;
+    e->flags = PICKUP_PICKAXE;
+    e->counter = MAX_TTL / 2 + (rand() % MAX_TTL);
+    e->update = pickup_wait_update;
+}
+
 void pickup_wait_update(Entity *e)
 {
     if (e->counter-- == 0)
@@ -141,17 +149,18 @@ void pickup_in_update(Entity *e)
                 case PICKUP_TIME:
                     e->frames = (const Rect *)frames;
                     e->frame = 0;
-                    e->counter = 0;
-                    e->update = pickup_update;
                     break;
                 case PICKUP_BONUS:
                     e->frames = (const Rect *)frames_bonuses[rand() % 3];
                     e->frame = 0;
-                    e->counter = 0;
-                    e->update = pickup_update;
+                    break;
+                case PICKUP_PICKAXE:
+                    e->frames = (const Rect *)frames;
+                    e->frame = 1;
                     break;
             }
-
+            e->counter = 0;
+            e->update = pickup_update;
         }
     }
 }
@@ -189,6 +198,9 @@ void pickup_update(Entity *e)
             case PICKUP_BONUS:
                 add_score(250);
                 break;
+            case PICKUP_PICKAXE:
+                add_pickaxe();
+                break;
         }
         e->used = 0;
     }
diff --git a/src/pickup.h b/src/pickup.h
index 97777c2..ecb5350 100644
--- a/src/pickup.h
+++ b/src/pickup.h
@@ -3,6 +3,7 @@
 
 void pickup_time_init(Entity *e);
 void pickup_bonus_init(Entity *e);
+void pickup_pickaxe_init(Entity *e);
 
 void pickup_wait_update(Entity *e);
 void pickup_in_update(Entity *e);
diff --git a/src/player.c b/src/player.c
index ae50348..71c951a 100644
--- a/src/player.c
+++ b/src/player.c
@@ -309,8 +309,12 @@ uint8_t player_collision(Entity *e)
 
 void player_hit()
 {
-    /* TODO: pickaxe */
-    dying = 1;
-    frame = FRAME_DYING;
-    gravity = GRAVITY_UP;
+    if (use_pickaxe())
+        invuln = INVULN_TIME;
+    else
+    {
+        dying = 1;
+        frame = FRAME_DYING;
+        gravity = GRAVITY_UP;
+    }
 }
-- 
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