From 8874b41dbd3dd68043b3d193108bf4fea4017676 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Wed, 15 Jan 2025 05:48:43 +0100
Subject: [PATCH] actor: added mask for tile postions

---
 src/actor.s | 9 +++++++++
 src/wram.s  | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/src/actor.s b/src/actor.s
index a8b63ec..aa68120 100644
--- a/src/actor.s
+++ b/src/actor.s
@@ -171,6 +171,15 @@ actor_anim_verify:
   call anim_clear
   ret
 
+  ; truncates the position 
+  ; to only use the high nibble
+  ; inputs:
+  ;   hl: ptr to y/x
+  ; returns:
+  ;   hl: trunacted y/x
+anim_truncate_pos:
+  ret
+
   ; marks the current actor's tile 
   ; as occupied by an actor
   ; also removes the flag from the actor's current tile 
diff --git a/src/wram.s b/src/wram.s
index 58e3e26..d259311 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -113,6 +113,8 @@ damage_anim: .adv 1
 .de room_exit_table, 2 ; list of ptrs to new rooms 
 .de room_size, 0
 
+#define TILE_POS_MASK 0xF0
+
 ; room flags
 .se 1
   ; set if a tile is a wall
-- 
2.30.2