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-rw-r--r--engine/overworld/is_player_just_outside_map.asm16
1 files changed, 16 insertions, 0 deletions
diff --git a/engine/overworld/is_player_just_outside_map.asm b/engine/overworld/is_player_just_outside_map.asm
new file mode 100644
index 00000000..24e434b3
--- /dev/null
+++ b/engine/overworld/is_player_just_outside_map.asm
@@ -0,0 +1,16 @@
+; returns whether the player is one tile outside the map in Z
+IsPlayerJustOutsideMap: ; 128d8 (4:68d8)
+ ld a, [W_YCOORD]
+ ld b, a
+ ld a, [W_CURMAPHEIGHT]
+ call .compareCoordWithMapDimension
+ ret z
+ ld a, [W_XCOORD]
+ ld b, a
+ ld a, [W_CURMAPWIDTH]
+.compareCoordWithMapDimension
+ add a
+ cp b
+ ret z
+ inc b
+ ret