From: Lukas Krickl <lukas@krickl.dev>
Date: Mon, 10 Nov 2025 12:47:07 +0000 (+0100)
Subject: tiles: added get adjacent tile clearing
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=94425b2d873b2045fab8b7b18912e6948f9333c8;p=gbrg%2F.git

tiles: added get adjacent tile clearing
---

diff --git a/src/defs.s b/src/defs.s
index d1009bb..4547f27 100644
--- a/src/defs.s
+++ b/src/defs.s
@@ -5,6 +5,8 @@
 
 #define UI_STATUS_LINE shadow_ui+1
 
+#define TILES_ADJACENT_MAX 8
+
 .def int OAMDMAFN = 0xFF80 
 #define WRAM 0xC000
 #define WRAMLEN 0xFFF
diff --git a/src/tiles.s b/src/tiles.s
index 31ba935..a34b7a2 100644
--- a/src/tiles.s
+++ b/src/tiles.s
@@ -83,6 +83,10 @@ tile_update_draw:
 	; inputs:
 	;		de: tile
 tile_update:
+	push de
+	call tile_get_adjacent
+	pop de
+
 	ld a, [de] ; load tile type 
 	add a, a ; * 2 offset into table
 
@@ -128,6 +132,7 @@ tile_str_table:
 	;	returns:
 	;		bc: actor
 tile_get_actor:
+	ld bc, NULL
 	; TODO:
 	ret
 	
@@ -138,6 +143,23 @@ tile_get_actor:
 	; also counts the amount of seen types 
 	; in tiles_adjacen_types
 tile_get_adjacent:
+	; clear adjacent tiles
+	; stored by previous frame
+	ld hl, tiles_adjacent
+	ld bc, 2 * TILES_ADJACENT_MAX
+	ld de, 0
+	call memset
+
+	; bc = y/x
+	ld a, [update_tile_y]
+	ld b, a
+	ld a, [update_tile_x]
+	ld c, a
+
+	ld hl, tiles_adjacent
+
+	; now get all tiles adjacent
+
 	ret
 
 	; updates empty tile
diff --git a/src/wram.s b/src/wram.s
index 2a5c9c5..e2c662f 100644
--- a/src/wram.s
+++ b/src/wram.s
@@ -84,10 +84,7 @@ tiles_end: .adv 0
 	; list of pointers
 	; to all adjacent tiles
 	; set to NULL if no tile is adjacent
-tiles_adjacent: .adv 2 * 8
-	; a list of adjacent types
-	; one byte for each TI_* type
-tiles_adjacent_types: .adv TI_SIZE
+tiles_adjacent: .adv 2 * TILES_ADJACENT_MAX
 
 ui_draw_routine: .adv 2