From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 10 Oct 2024 14:52:34 +0000 (+0200)
Subject: Added collision tile lut
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=1cb784d899adc723d78600cc00188925911f95ae;p=gbrg%2F.git

Added collision tile lut
---

diff --git a/src/collision.s b/src/collision.s
index d62cd87..bb54428 100644
--- a/src/collision.s
+++ b/src/collision.s
@@ -29,6 +29,9 @@ collision_player:
   ; center right
   col_point 0, 10 
 
+collision_tile_lut:
+  .rep cti, ROOM_H, 1, .db cti * ROOM_W 
+
   ; checks a collision ptr 
   ; with a map's meta tile
   ; if the tile has collision flag set 
@@ -42,4 +45,20 @@ collision_player:
   ;   a = 1 -> collision
   ;   hl += 2
 collision_tile:
+  ; y pos / 16 -> tile pos
+  sra d ; / 2
+  sra d ; / 4
+  sra d ; / 8
+  sra d ; / 16
+
+  ; x pos / 16 -> tile pos 
+  sra e ; / 2
+  sra e ; / 4
+  sra e ; / 8
+  sra e ; / 16
+
+  ; -> now convert position to 
+  ; map flag index using a simple lut
+  ; for y position + x
+
   ret