From d3b5f2641ba37c09d9a238e6032ebba6052ac17f Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 16 Oct 2025 20:59:52 +0200
Subject: [PATCH] nicer boundaries for grid on disksize

---
 cell.cpp       | 6 ++++++
 celldrawer.cpp | 4 +++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/cell.cpp b/cell.cpp
index fbe94009..ac8275d7 100644
--- a/cell.cpp
+++ b/cell.cpp
@@ -429,6 +429,12 @@ EX bool is_in_disk(cell *c) {
   return *it == c;
   }
 
+EX int disk_index(cell *c) {
+  auto it = lower_bound(all_disk_cells_sorted.begin(), all_disk_cells_sorted.end(), c);
+  if(it == all_disk_cells_sorted.end() || *it != c) return isize(all_disk_cells_sorted);
+  return it - all_disk_cells_sorted.begin();
+  }
+
 bool sierpinski3(gp::loc g) {
   int x = g.first;
   int y = g.second;
diff --git a/celldrawer.cpp b/celldrawer.cpp
index be224781..a2fb539e 100644
--- a/celldrawer.cpp
+++ b/celldrawer.cpp
@@ -880,7 +880,9 @@ EX bool pick_for_grid(cell *c, int t) {
   if(!c1) return false;
   // removed: if(WDIM == 3 && bt::in() && !sn::in()) return !among(t, 5, 6, 8);
   if(c == c1 && t <= c->c.spin(t)) return true;
-  return c < c1 || isWarped(c->move(t)) || fake::split();
+  bool order = c < c1;
+  if(disksize) order = disk_index(c) < disk_index(c1);
+  return order || isWarped(c->move(t)) || fake::split();
   }
 
 void celldrawer::draw_grid() {