From e19a3cbb41686dc2982c5f8cfe259ab6e0514bd7 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Fri, 31 Jan 2025 05:36:51 +0100
Subject: [PATCH] animation: Added animation ptr handling

---
 src/actor.s     |  5 +++++
 src/animation.s | 30 ++++++++++++++++++++++++++++++
 src/mem.s       |  1 +
 src/wram.s      |  4 ++++
 4 files changed, 40 insertions(+)

diff --git a/src/actor.s b/src/actor.s
index a02a9c1..b5036e1 100644
--- a/src/actor.s
+++ b/src/actor.s
@@ -526,4 +526,9 @@ who_next:
     ld a, WHO_PLAYER
 @no_player:
   ld [who], a
+
+  ; advance some other values 
+  ; related to the next turn starting 
+  call anim_next
+
   ret
diff --git a/src/animation.s b/src/animation.s
index 6e39ae3..5fc9ea2 100644
--- a/src/animation.s
+++ b/src/animation.s
@@ -2,6 +2,36 @@
 ; each frame the latest animation is 
 ; updated
 
+  ; sets up animation ptr 
+anim_init:
+  ld hl, anim_table
+  ld a, l
+  ld [anim_ptr], a
+  ld a, h
+  ld [anim_ptr+1], a
+  ret
+
+  ; advances animation ptr to
+  ; its next value 
+anim_next:
+  ld a, [who]
+  cp a, 0
+  jp z, anim_init
+
+  ld a, [anim_ptr]
+  ld l, a
+  ld a, [anim_ptr+1]
+  ld h, a
+
+  ld de, anim_size
+  add hl, de ; hl = next animation ptr
+
+  ld a, l
+  ld [anim_ptr], a
+  ld a, h
+  ld [anim_ptr+1], a
+
+  ret
 
 anim_walk_north:
   ret
diff --git a/src/mem.s b/src/mem.s
index 7e24aab..df73aa6 100644
--- a/src/mem.s
+++ b/src/mem.s
@@ -6,6 +6,7 @@ mem_init:
   call memset
   
   call rand_init
+  call anim_init 
 
   ; copy shadow oam dma function 
   ld de, shadow_oam_to_oam 
diff --git a/src/wram.s b/src/wram.s
index 992f5e1..2ab803b 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -103,6 +103,10 @@ anim_step_x: .adv 1
 anim_target_y: .adv 1
 anim_target_x: .adv 1
 
+  ; pointing to current animation 
+  ; advanced in who_next 
+  ; l/h ptr
+anim_ptr: .adv 2
   ; 1 animation buffer for each actor + player
 anim_table: .adv anim_size * (ACTORS_MAX + 1)
 
-- 
2.30.2