From 7fd199dd49cc65ba8552aad3bfc75647a9702bfb Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 28 Jan 2020 13:02:39 +0100
Subject: [PATCH] reg3:: nice Zebra and Graveyard patterns

---
 landgen.cpp | 23 +++++++++++++++++++++++
 reg3.cpp    |  4 ++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/landgen.cpp b/landgen.cpp
index e9fcd5aa..aa013c80 100644
--- a/landgen.cpp
+++ b/landgen.cpp
@@ -667,6 +667,29 @@ EX void giantLandSwitch(cell *c, int d, cell *from) {
         #endif
         else if(arb::in() && arb::current.have_line)
           c->wall = arb::linespattern(c) ? waTrapdoor : waNone;
+        else if(reg3::in_rule()) switch(geometry) {
+          case gSpace534: {
+            if(c->master->fieldval == 0) c->wall = waTrapdoor;
+            forCellCM(c1, c) if(c1->master->fieldval == 0) c->wall = waTrapdoor;
+            break;
+            }
+          case gSpace435: {
+            for(int i=0; i<S7; i++) {
+              cellwalker cw(c, i);
+              for(int a=0; a<3; a++) {
+                if(cw.at->master->fieldval == 0) c->wall = waTrapdoor;
+                cw += wstep;
+                cw += rev;
+                }
+              }
+            break;
+            }
+          case gSpace535: {
+            if((c->master->fieldval % 5) % 2 == 1) c->wall = waTrapdoor;
+            break;
+            }
+          default: ;
+          }
         else if(euclid && !arcm::in()) {
           auto co = euc2_coordinates(c);
           int y = co.second;
diff --git a/reg3.cpp b/reg3.cpp
index 7dec807c..29cce980 100644
--- a/reg3.cpp
+++ b/reg3.cpp
@@ -1226,8 +1226,6 @@ EX bool pseudohept(cell *c) {
       return abs(h[3]) > .99 || abs(h[0]) > .99 || abs(h[1]) > .99 || abs(h[2]) > .99;
     }
   // chessboard pattern in 534
-  if(geometry == gSpace534) 
-    return c->master->distance & 1;
   if(geometry == gField534) 
     return hr::celldistance(c, currentmap->gamestart()) & 1;
   if(geometry == gCrystal344 || geometry == gCrystal534 || geometry == gSeifertCover)
@@ -1235,6 +1233,8 @@ EX bool pseudohept(cell *c) {
   if(quotient) return false; /* added */
   auto mr = dynamic_cast<hrmap_reg3_rule*> (currentmap);
   if(mr) {
+    if(geometry == gSpace535) 
+      return c->master->fieldval % 31 == 0;
     return c->master->fieldval == 0;
     }
   if(m && hyperbolic) {