do not do walls if walls not implemented

bigstuff.cpp

@@ -1371,6 +1371,10 @@ EX bool good_for_wall(cell *c) {
   if(WDIM == 3) return true;
   return pseudohept(c);
   }
+
+EX bool walls_not_implemented() {
+  return WDIM == 3 && (cgflags & qIDEAL);
+  }
   
 EX void buildBigStuff(cell *c, cell *from) {
   if(sphere || quotient || nonisotropic || (penrose && !binarytiling) || experimental) return;
@@ -1383,6 +1387,8 @@ EX void buildBigStuff(cell *c, cell *from) {
   
   if(hybri) ;  /* Great Walls generated via the underlying geometry */
   
+  else if(walls_not_implemented()); // walls not implemented here
+  
   else if(geometry == gNormal && celldist(c) < 3 && !GOLDBERG) {
     if(top_land && c == cwt.at->master->move(3)->c7) {
       buildBarrierStrong(c, 6, true, top_land);

geom-exp.cpp

@@ -345,7 +345,7 @@ void ge_land_selection() {
       });
     }
   dialog::addBreak(50);
-  if(chaosUnlocked && !quotient && !euclid && !sphere) {
+  if(chaosUnlocked && !quotient && !euclid && !sphere && !walls_not_implemented()) {
     dialog::addItem(XLAT("Chaos mode"), '1');
     dialog::add_action(dual::mayboth([] {
       if(chaosUnlocked) dialog::do_if_confirmed([] {

landlock.cpp

@@ -659,6 +659,7 @@ namespace lv {
   land_validity_t sloppy_pattern = {1, q1 | one_and_half, "Somewhat sloppy pattern."};
   land_validity_t no_fractal_landscapes = {1, q1 | one_and_half, "Fractal landscapes not implemented in this geometry."};
   land_validity_t simplified_walls = { 1, q1, "Only simplified walls implemented."};  
+  land_validity_t no_walls = { 0, q0, "No walls implemented."};  
   land_validity_t disabled = {0, q0, "This land has been disabled with compilation flags."};
   land_validity_t pattern_special = {3, qm3, "Special pattern implemented for this geometry."}; 
   land_validity_t not_3d = {0, q0, "This land does not make much sense in 3D."}; 
@@ -680,6 +681,9 @@ EX land_validity_t& land_validity(eLand l) {
 
   using namespace lv;
   
+  if(walls_not_implemented() && isCrossroads(l))
+    return no_walls;
+  
   if(hybri || hybrid::pmap) {
     if(among(l, laPrincessQuest, laPrairie, laMirrorOld, laMirror, laDual, laWarpCoast, laKraken, laBrownian, laWhirlpool, laWestWall, laHive, laClearing, laWhirlwind, laBlizzard, laBull, laTerracotta, laCrossroads5,
       laEndorian, laDungeon, laMountain))

menus.cpp

@@ -496,6 +496,7 @@ EX void show_chaos() {
   
   if(chaosUnlocked) for(int a=1; a<5; a++) {
     if(a > 1 && ISWEB) continue;
+    if(a == 1 && walls_not_implemented()) continue;
     dialog::addBoolItem(
       a == 1 ? XLATN("Crossroads IV") : 
       a == 2 ? XLATN("Palace") : 

system.cpp

@@ -1197,7 +1197,9 @@ EX void set_geometry(eGeometry target) {
       }
     geometry = target;
   
-    if(chaosmode && bounded) chaosmode = false;
+    if(chaosmode && bounded) chaosmode = 0;
+    if(chaosmode == 1 && walls_not_implemented()) chaosmode = 0;
+
     if(euclid6) variation = eVariation::bitruncated;
     #if CAP_IRR
     if(IRREGULAR) variation = eVariation::bitruncated;