From ffa1c95279d2145a968e6c9b749194ee652e47cb Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Fri, 11 Oct 2024 13:13:48 +0200
Subject: [PATCH] wip: map tile flag lookup

---
 src/collision.s | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/collision.s b/src/collision.s
index d1bca5e..2b9e5d7 100644
--- a/src/collision.s
+++ b/src/collision.s
@@ -75,9 +75,19 @@ collision_tile:
   sra e ; / 4
   sra e ; / 8
   sra e ; / 16
+  ld a, e ; a = x pos
+
+  ld e, d
+  ld d, 0 ; de = y position now
 
   ; -> now convert position to 
   ; map flag index using a simple lut
   ; for y position + x
+  ld hl, collision_tile_lut
+  add hl, de ; hl + y offset 
+  ; hl = row ptr
+  ld e, a ; e = x pos
+  ld a, [hl] ; a = map flags row offset 
+  add a, e ; row + x = position of tile in map 
 
   ret
-- 
2.30.2