From ad93e77bcc9e8a4eabe33f1627d0d0fbec5de8ae Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 21 Apr 2018 17:57:30 +0200
Subject: [PATCH] canvas_invisible option

---
 commandline.cpp | 4 +++-
 hyper.h         | 1 +
 landgen.cpp     | 2 ++
 pattern2.cpp    | 9 +++++++++
 system.cpp      | 1 +
 5 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/commandline.cpp b/commandline.cpp
index 5cf34234..2300ff43 100644
--- a/commandline.cpp
+++ b/commandline.cpp
@@ -109,8 +109,10 @@ int arg::readCommon() {
     PHASE(2);
     firstland = specialland = laCanvas;
     shift();
-    if(args().size() == 1) patterns::whichCanvas = args()[0];
+    if(args() == "i") canvas_invisible = !canvas_invisible;
+    else if(args().size() == 1) patterns::whichCanvas = args()[0];
     else patterns::canvasback = arghex();
+    if(curphase == 3) restartGame();
     }
   else if(argis("-noplayer")) 
     mapeditor::drawplayer = !mapeditor::drawplayer;
diff --git a/hyper.h b/hyper.h
index 575c9d1a..a7087d84 100644
--- a/hyper.h
+++ b/hyper.h
@@ -3264,3 +3264,4 @@ ld master_to_c7_angle();
 
 extern int mutantphase;
 void resize_screen_to(int x, int y);
+extern bool canvas_invisible;
diff --git a/landgen.cpp b/landgen.cpp
index b67c8f92..79db977a 100644
--- a/landgen.cpp
+++ b/landgen.cpp
@@ -2343,6 +2343,8 @@ void setdist(cell *c, int d, cell *from) {
   
   if(d == BARLEV && c->land == laCanvas)  {
     c->landparam = patterns::generateCanvas(c);
+    if(canvas_invisible)
+      c->wall = waInvisibleFloor;
     }
 
   if(d >= BARLEV-1 && c->land == laPrairie)
diff --git a/pattern2.cpp b/pattern2.cpp
index f2383f04..6757f292 100644
--- a/pattern2.cpp
+++ b/pattern2.cpp
@@ -1283,6 +1283,9 @@ namespace patterns {
       dialog::addSelItem(XLAT("field pattern S"), "field", 'S');
       }
 
+    dialog::addBreak(100);
+    dialog::addBoolItem(XLATN(winf[waInvisibleFloor].name), canvas_invisible, 'i');
+
     dialog::display();
     
     keyhandler = [] (int sym, int uni) {
@@ -1301,6 +1304,12 @@ namespace patterns {
           restartGame(0, false, true);
           };
         }
+      else if(uni == 'i') {
+        canvas_invisible = !canvas_invisible;
+        firstland = specialland = laCanvas; 
+        randomPatternsMode = false;
+        restartGame(0, false, true);
+        }
       else if((uni >= 'a' && uni <= 'z') || (uni >= 'A' && uni <= 'Z')) {
         whichCanvas = uni;
         subcanvas = rand();
diff --git a/system.cpp b/system.cpp
index 3fc37814..c89b07ac 100644
--- a/system.cpp
+++ b/system.cpp
@@ -6,6 +6,7 @@
 
 bool cblind;
 bool autocheat;
+bool canvas_invisible;
 
 int truelotus;
 int gamecount;