From a20b308cfe92a8bb47c6896e7fdb24b15c2efd59 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Fri, 12 May 2023 23:36:49 +0100
Subject: Add player bullets

Also a changes in the entity system:

- don't preserve the BG (always erase black)
- skip unused entities
- fix in the reserved size (and entity is 8 bytes)
- allocate new entities
---
 game/player.asm | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'game/player.asm')

diff --git a/game/player.asm b/game/player.asm
index 0e44411..ef63839 100644
--- a/game/player.asm
+++ b/game/player.asm
@@ -2,6 +2,9 @@
 ; player update code
 ;
 
+cool_down:
+    .db 0
+
 player_update:
     ld x, [sp + 2]
     ld a, [sp + 3]
@@ -52,6 +55,8 @@ player_update:
     ; base frame
     ld y, 0
 
+    push b
+
     ; both left and right
     and b, 48
     cmp b, 48
@@ -69,4 +74,27 @@ player_update:
 
 player_store_frame:
     ld [a : x], y
+
+    pop b
+
+    ; fire
+    bit b, 0
+    bnz
+    ret
+
+    ld x, <cool_down
+    ld a, >cool_down
+    ld y, [a : x]
+    cmp y, 0
+    bz
+    jmp player_fire
+    dec y
+    ld [a : x], y
+    ret
+
+player_fire:
+    add y, 10
+    ld [a : x], y
+
+    call bullet_player_new
     ret
-- 
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