From 9292634f2f8d71a53879ff07e1330c671b207d51 Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Mon, 6 Jul 2026 23:05:04 -0400
Subject: feat: split the concept of hidden and impassable exits. add
 player_flag for discovered hidden exits.

---
 internal/world/grid.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'internal/world/grid.go')

diff --git a/internal/world/grid.go b/internal/world/grid.go
index 837f737..2ea897a 100644
--- a/internal/world/grid.go
+++ b/internal/world/grid.go
@@ -32,12 +32,15 @@ type RoomGrid struct {
 //     are then not followed, but any coordinate already assigned to it stands.
 //   - include, when non-nil, restricts placement to targets for which it returns
 //     true (pass nil to place every reachable target).
+//   - edgeInclude, when non-nil, restricts traversal to exits for which it
+//     returns true (pass nil to follow every exit whose target passes include).
+//     It receives (fromRoomID, dir, targetRoomID) and is checked before include.
 //   - onConflict, when non-nil, is called for each twist/overlap encountered.
 //
 // The first assignment to a room or cell always wins; conflicting placements are
 // skipped. In a world that passes grid validation there are no conflicts, so the
 // layout is unambiguous.
-func BuildGrid(seed int, load func(int) (*Room, bool), include func(int) bool, onConflict func(GridConflict)) RoomGrid {
+func BuildGrid(seed int, load func(int) (*Room, bool), include func(int) bool, edgeInclude func(int, ExitDir, int) bool, onConflict func(GridConflict)) RoomGrid {
 	g := RoomGrid{
 		Coord:  map[int][3]int{seed: {0, 0, 0}},
 		RoomAt: map[[3]int]int{{0, 0, 0}: seed},
-- 
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