From e90eb291599bdcaac826faf1769fd5148d27ebcf Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Tue, 12 Aug 2025 18:23:20 +0200
Subject: [PATCH] objanim: Added simple animation for down door opening.

This now just needs to be made more generic for the other directions.
---
 src/objanim.s | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/src/objanim.s b/src/objanim.s
index 34bb5ab..516c756 100644
--- a/src/objanim.s
+++ b/src/objanim.s
@@ -49,8 +49,8 @@ objanim_door_open:
 	ld [de], a
 	inc de ; de = timer
 	
-	; set timer
-	ld a, 0x40
+	; clear frame counter
+	xor a, a
 	ld [de], a
 
 	; set gameplay flag to pause object updates
@@ -85,8 +85,16 @@ objanim_door_open_down_fn:
 
 	ld a, [de] ; a = x position
 	tile_to_scrn OBJ_OFF_X, c 
-	ld [hl+], a
 	ld [TMP_X], a
+	; offset position by counter 
+	push af
+	ld a, [objanim+obja_timer]
+	sra a
+	ld b, a
+	pop af
+	sub a, b
+	ld [hl+], a
+
 	
 	; door tile
 	ld a, DOOR_SPRITE_TILE 
@@ -106,6 +114,13 @@ objanim_door_open_down_fn:
 	; set x pos
 	ld a, [TMP_X]
 	add a, 8 ; move over a tile
+	; offset position by counter
+	push af
+	ld a, [objanim+obja_timer]
+	sra a
+	ld b, a
+	pop af
+	add a, b
 	ld [hl+], a
 	
 	; tile 
@@ -117,10 +132,10 @@ objanim_door_open_down_fn:
 	ld [hl], a
 
 	; check if we are done
-	ld de, objanim+obja_timer
-	ld a, [de]
-	dec a
-	ld [de], a ; timer--
+	ld a, [objanim+obja_timer]
+	inc a
+	ld [objanim+obja_timer], a ; frame counter++
+	cp a, 0x10 ; end frame?
 	jr z, @timer_done REL
 
 	ldnull bc
-- 
2.30.2