From d1c70c8118e53f28bc2cfe3de64f7c30762c8b33 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Wed, 10 May 2023 08:01:48 +0100
Subject: Removed subroutine as it is more readable like this

---
 game/entities.asm | 190 +++++++++++++++++++++++++-----------------------------
 1 file changed, 87 insertions(+), 103 deletions(-)

(limited to 'game')

diff --git a/game/entities.asm b/game/entities.asm
index fa9d8fd..aaab135 100644
--- a/game/entities.asm
+++ b/game/entities.asm
@@ -23,37 +23,44 @@ entities_erase_next:
     bz
     jmp entities_erase_done
 
-    ; write, no transparent
-    ld y, 1
-    push y
+    ; settings mode
+    ld y, 128
+    ld b, 0xb0
+    port b, y
+
+    ; setup
+    inc b
 
-    ; dst: x
+    ; addr: bg data
+    ld y, 0
+    port b, y
+    ld y, [sp + 0]
+    port b, y
+
+    ; x
     inc x
     bo
     inc a
     ld y, [a : x]
-    push y
+    port b, y
 
-    ; dst: y
+    ; y
     inc x
     bo
     inc a
     ld y, [a : x]
-    push y
-
-    ; src: saved bg
-    ld y, [sp + 3]
-    push y
-    ld y, 0
-    push y
+    port b, y
 
-    call entities_blt
+    ; 16x16
+    ld y, 16
+    port b, y
+    port b, y
 
-    pop y
-    pop y
-    pop y
-    pop y
-    pop y
+    ; blit
+    dec b
+    ; write, no transparent
+    ld y, 1
+    port b, y
 
     ; next entity
     add x, 5
@@ -132,102 +139,59 @@ entities_draw_next:
     inc x
     bo
     inc a
-    ; save x addr for later
-    push a
-    push x
-
-    ; save bg
-
-    ; read, no transparent
-    ld y, 4
-    push y
-
-    ; dst: x
     ld y, [a : x]
+    ; x coord
     push y
 
-    ; dst: y
     inc x
     bo
     inc a
     ld y, [a : x]
+    ; y coord
     push y
 
-    ; dst: save bg
-    ld y, [sp + 5]
-    push y
-    ld y, 0
-    push y
-
-    call entities_blt
-
-    pop y
-    pop y
-    pop y
-    pop y
-    pop y
-
-    ; draw sprite
-
-    ; x addr
-    pop x
-    pop a
-
-    ; write, transparent
-    ld y, 3
-    push y
-
-    ; dst: x
-    ld y, [a : x]
-    push y
-
-    ; dst: y
     inc x
     bo
     inc a
-    ld y, [a : x]
-    push y
+    ; a : x points to sprite data
 
-    ; src: the sprite
-    inc x
-    bo
-    inc a
-    ld y, [a : x]
-    inc x
-    bo
-    inc a
-    ld b, [a : x]
-    push b
-    push y
+    ; get gb data
 
-    call entities_blt
+    ; settings mode
+    ld y, 128
+    ld b, 0xb0
+    port b, y
 
-    pop y
-    pop y
-    pop y
-    pop y
-    pop y
+    ; setup
+    inc b
 
-    ; next entity
-    add x, 3
-    bo
-    inc a
+    ; addr: bg data saving space
+    ld y, 0
+    port b, y
+    ld y, [sp + 2]
+    port b, y
 
-    pop b
-    inc b
-    push b
+    ; x
+    ld y, [sp + 1]
+    port b, y
 
-    jmp entities_draw_next
+    ; y
+    ld y, [sp + 0]
+    port b, y
 
-entities_draw_done:
-    pop a
-    ret
+    ; 16x16
+    ld y, 16
+    port b, y
+    port b, y
+
+    ; blit
+    dec b
+    ; read, no transparent
+    ld y, 4
+    port b, y
+
+    ; draw sprite
 
-; sp: write mode
-;     y coord
-;     x coord
-;     addr
-entities_blt:
     ; settings mode
     ld y, 128
     ld b, 0xb0
@@ -236,17 +200,21 @@ entities_blt:
     ; setup
     inc b
 
-    ; addr
-    ld y, [sp + 2]
+    ; addr: sprite data
+    ld y, [a : x]
     port b, y
-    ld y, [sp + 3]
+    inc x
+    bo
+    inc a
+    ld y, [a : x]
     port b, y
 
     ; x
-    ld y, [sp + 5]
+    ld y, [sp + 1]
     port b, y
+
     ; y
-    ld y, [sp + 4]
+    ld y, [sp + 0]
     port b, y
 
     ; 16x16
@@ -256,8 +224,24 @@ entities_blt:
 
     ; blit
     dec b
-    ; write mode
-    ld y, [sp + 6]
+    ; writw, transparent
+    ld y, 3
     port b, y
-    ret
 
+    pop y
+    pop y
+
+    ; next entity
+    add x, 3
+    bo
+    inc a
+
+    pop b
+    inc b
+    push b
+
+    jmp entities_draw_next
+
+entities_draw_done:
+    pop a
+    ret
-- 
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