From fa04007c720c6f692f5fa5add2dfe1be4461158b Mon Sep 17 00:00:00 2001
From: Ash Ketchum <no-reply@sl0p.foo>
Date: Wed, 15 Jul 2026 11:29:39 +0200
Subject: explore (P1): direction markers for legit connections

After rendering each map in EXPLORE, overlay N/S/E/W letters at the screen edges
for the directions that have a real connection (from wCurMapConnections), so you
can see which moves are valid before pressing. P1 done: browse the overworld
connection graph, see exits, no warping yet.
---
 engine/slop_menu.asm | 44 +++++++++++++++++++++++++++++++++++---------
 1 file changed, 35 insertions(+), 9 deletions(-)

(limited to 'engine')

diff --git a/engine/slop_menu.asm b/engine/slop_menu.asm
index fbcd222a..69ec2142 100644
--- a/engine/slop_menu.asm
+++ b/engine/slop_menu.asm
@@ -247,6 +247,32 @@ SlopExplore:
 	ldh [rLCDC], a
 	ld a, $90
 	ldh [hWY], a                   ; window off-screen -> the BG map is visible
+; overlay direction markers at the screen edges for the legit connections
+	call LoadFontTilePatterns
+	ld a, [wCurMapConnections]
+	ld e, a
+	bit NORTH_F, e
+	jr z, .noN
+	hlcoord 9, 0
+	ld [hl], $8D
+.noN
+	bit SOUTH_F, e
+	jr z, .noS
+	hlcoord 9, 15
+	ld [hl], $92
+.noS
+	bit WEST_F, e
+	jr z, .noW
+	hlcoord 0, 8
+	ld [hl], $96
+.noW
+	bit EAST_F, e
+	jr z, .noE
+	hlcoord 18, 8
+	ld [hl], $84
+.noE
+	ld b, HIGH(vBGMap0)
+	call CopyScreenTileBufferToVRAM  ; push map + markers to VRAM
 .input
 	call DelayFrame
 	call JoypadLowSensitivity
@@ -258,37 +284,37 @@ SlopExplore:
 	jr z, .chkDown
 	ld a, [wCurMapConnections]
 	bit NORTH_F, a
-	jr z, .input
+	jp z, .input
 	ld a, [wNorthConnectedMap]
 	ld [wCurMap], a
-	jr .render
+	jp .render
 .chkDown
 	bit B_PAD_DOWN, d
 	jr z, .chkLeft
 	ld a, [wCurMapConnections]
 	bit SOUTH_F, a
-	jr z, .input
+	jp z, .input
 	ld a, [wSouthConnectedMap]
 	ld [wCurMap], a
-	jr .render
+	jp .render
 .chkLeft
 	bit B_PAD_LEFT, d
 	jr z, .chkRight
 	ld a, [wCurMapConnections]
 	bit WEST_F, a
-	jr z, .input
+	jp z, .input
 	ld a, [wWestConnectedMap]
 	ld [wCurMap], a
-	jr .render
+	jp .render
 .chkRight
 	bit B_PAD_RIGHT, d
-	jr z, .input
+	jp z, .input
 	ld a, [wCurMapConnections]
 	bit EAST_F, a
-	jr z, .input
+	jp z, .input
 	ld a, [wEastConnectedMap]
 	ld [wCurMap], a
-	jr .render
+	jp .render
 .exit
 	pop af
 	ld [wCurMap], a               ; restore origin map
-- 
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