From 3a0b383b9bbee4d41b6280bfba2051bd61cf39f5 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 16 Jun 2021 12:45:39 +0200
Subject: [PATCH] out_of_bounds cell

---
 cell.cpp     | 2 ++
 hypgraph.cpp | 1 +
 landgen.cpp  | 1 +
 3 files changed, 4 insertions(+)

diff --git a/cell.cpp b/cell.cpp
index fc63ba06..ffdca79c 100644
--- a/cell.cpp
+++ b/cell.cpp
@@ -1364,4 +1364,6 @@ EX bool is_boundary(cell *c) {
   return (cgflags & qPORTALSPACE) && isWall(c->wall);
   }
 
+EX cell out_of_bounds;
+
 }
diff --git a/hypgraph.cpp b/hypgraph.cpp
index 5937aaa7..b2ea1538 100644
--- a/hypgraph.cpp
+++ b/hypgraph.cpp
@@ -1720,6 +1720,7 @@ void hrmap::draw_at(cell *at, const shiftmatrix& where) {
     for(int i=0; i<c->type; i++) {
       // note: need do cmove before c.spin
       cell *c1 = c->cmove(i);      
+      if(c1 == &out_of_bounds) continue;
       enq(c1, optimized_shift(V * adj(c, i)));
       }
     }
diff --git a/landgen.cpp b/landgen.cpp
index 6a8fb0a5..11b03625 100644
--- a/landgen.cpp
+++ b/landgen.cpp
@@ -2877,6 +2877,7 @@ EX hookset<bool(cell *c, int d, cell *from)> hooks_cellgen;
 
 EX void setdist(cell *c, int d, cell *from) {
 
+  if(c == &out_of_bounds) return;
   if(fake::in()) return FPIU(setdist(c, d, from));
   
   if(c->mpdist <= d) return;