From 0b1e7efd1ced04ba2f1ffda7743a6dc0d342fd7c Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Sun, 6 Oct 2024 18:45:57 +0200
Subject: [PATCH] Added function to gain resources

---
 src/player.s | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/src/player.s b/src/player.s
index 36f252c..017bc3e 100644
--- a/src/player.s
+++ b/src/player.s
@@ -119,6 +119,24 @@ player_update:
   pop hl
 @nota:
 
+  input_just BTNB
+  jr z, @notb REL
+
+  ; gain 1 hp
+  ld a, 1
+  ; make sure we do not mess with hl
+  push hl
+  ; hl = player_x right now
+  inc hl 
+  inc hl ; hl = player_hp
+  call player_gain_resource 
+  ; call for UI redraw
+  ld a, UI_REDRAW_HP 
+  ld [ui_flags], a
+  pop hl
+
+@notb:
+
   ; drawing 
 
   ; sotre x in e
@@ -195,4 +213,22 @@ player_use_resource:
   ;   [hl]: pointer to selected resource
   ;     a : the amount to add
 player_gain_resource:
+  ld b, a ; b = to add 
+  ld a, [hl+] ; a = current resource. hl = max 
+  cp a, [hl] ; a = max resource 
+  ; skip if already at max 
+  jp z, @skip
+
+  ; add new value 
+  add a, b
+  cp a, [hl]
+  jp c, @no_overflow
+
+  ld a, [hl] ; a = amx
+
+@no_overflow:
+  ; store value 
+  dec hl ; hl = current resource 
+  ld [hl], a
+@skip:
   ret
-- 
2.30.2