From de21dd4173c6b6525a8479e3970f76e731ed7829 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 16 Apr 2026 12:39:31 +0200
Subject: [PATCH] ru:: arena doors

---
 rogueviz/ru/globals.cpp |  5 ++++-
 rogueviz/ru/ru.cpp      | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/rogueviz/ru/globals.cpp b/rogueviz/ru/globals.cpp
index ad2214f2..97d8b354 100644
--- a/rogueviz/ru/globals.cpp
+++ b/rogueviz/ru/globals.cpp
@@ -64,7 +64,9 @@ enum eWall {
   wSecretPassageHHidden, wSecretPassageH,
   wSign, wWallSign, wTimeDoor,
   wBottomSpike, wRogueWallHidden, wRogueWall, wRightSlope, wLeftSlope, wLeftSlopedRoof, wRightSlopedRoof,
-  wWeakWall, wStrangeSign, wWalkSpikes, wHyperBouncy, wGUARD };
+  wWeakWall, wStrangeSign, wWalkSpikes, wHyperBouncy,
+  wArenaDoor,
+  wGUARD };
 
 flagtype W_BLOCK = 1;
 flagtype W_TRANS = 2;
@@ -134,6 +136,7 @@ ruwall walls[qwall] = {
   {"strange sign", "X", 0x90909080, W_TRANS, "A strange sign is drawn in the background."},
   {"walkable spikes", "|", 0xC08080FF, W_TRANS | W_PAIN_DOWN, "You can walk through these spikes, but falling into them would hurt."},
   {"hyper-bouncy wall", "#", 0xC04040FF, W_BLOCK | W_BOUNCY | W_HYPERBOUNCY, "Like walls, but things really bounce off them."},
+  {"arena door", "+", 0x50A000FF, W_BLOCK, "You need to defeat all monsters here to open this door."}
   };
 
 int sel = 1;
diff --git a/rogueviz/ru/ru.cpp b/rogueviz/ru/ru.cpp
index a7d013f4..0631fa6b 100644
--- a/rogueviz/ru/ru.cpp
+++ b/rogueviz/ru/ru.cpp
@@ -162,6 +162,18 @@ void playing_frame() {
   for(auto& e: ents) if(!e->destroyed) *(mb++) = std::move(e);
   ents.resize(mb - ents.begin());
 
+  int enemies = 0;
+  for(auto& e: ents) if(e->as_enemy() && e->existing) enemies++;
+  if(enemies > 0) {
+    walls[wArenaDoor].glyph = '+';
+    walls[wArenaDoor].flags = W_BLOCK | W_BLOCKBIRD;
+    }
+  else {
+    walls[wArenaDoor].glyph = '\'';
+    walls[wArenaDoor].flags = W_TRANS;
+    }
+
+
   for(auto &e: new_entities) ents.push_back(std::move(e));
   new_entities.clear();