Make doors randomly on the rooms.

main.cpp

@@ -23,7 +23,6 @@ using std::string;
 using namespace fmt;
 using namespace std::chrono_literals;
 
-
 int main() {
   using namespace ftxui;
   std::string reset_position;
@@ -43,6 +42,7 @@ int main() {
   string dead_yet = "NOT DEAD";
 
   bool show_paths = false;
+  bool bomb = false;
 
   auto map = Renderer([&] {
     game_map.set_target(me);
@@ -63,6 +63,12 @@ int main() {
       }
     }
 
+    if(bomb) {
+      /// draw
+      bomb = false;
+      c.DrawPointCircle(me.x*2, me.y*4, 4, Color::Red);
+    }
+
     c.DrawText(enemy.x*2, enemy.y*4, "!", Color::Red);
     c.DrawText(me.x*2, me.y*4, "@", Color::Blue);
     c.DrawText(goal.x*2, goal.y*4, "$", Color::Yellow);
@@ -95,6 +101,8 @@ int main() {
         y += 1;
       }  else if(e == Event::ArrowUp) {
         y -= 1;
+      } else if(e == Event::Backspace) {
+        bomb = true;
       } else {
         return false;
       }

map.cpp

@@ -179,7 +179,12 @@ bool Map::neighbors(Point &out, bool greater) {
 
   int zero_i = -1;
   int cur = m_paths[out.y][out.x];
-  dbc::check(cur != 1000, "WRONG! start point is in a wall");
+
+  if(cur == 1000) {
+    // BUG: sometimes the generation clips a door and we
+    // start in a wall
+    return false;
+  }
 
   for(int i = 0; i < 4; ++i) {
     Point dir = dirs[i];
@@ -210,11 +215,36 @@ void Map::set_door(Room &room, int value) {
   m_walls[room.exit.y][room.exit.x] = value;
 }
 
+void rand_side(Room &room, Point &door) {
+  std::uniform_int_distribution<int> rand_side(0, 3);
+  std::uniform_int_distribution<int> rand_x(0, room.width - 1);
+  std::uniform_int_distribution<int> rand_y(0, room.height - 1);
+
+  switch(rand_side(g_generator)) {
+    case 0: // north
+      door.x = room.x + rand_x(g_generator);
+      door.y = room.y-1;
+      break;
+    case 1: // south
+      door.x = room.x + rand_x(g_generator);
+      door.y = room.y + room.height;
+      break;
+    case 2: // east
+      door.x = room.x + room.width;
+      door.y = room.y + rand_y(g_generator);
+      break;
+    case 3: // west
+      door.x = room.x - 1;
+      door.y = room.y + rand_y(g_generator);
+      break;
+    default:
+      dbc::sentinel("impossible side");
+  }
+}
+
 void Map::add_door(Room &room) {
-  room.entry.x = room.x;
-  room.entry.y = room.y-1;
-  room.exit.x = room.x + room.width - 1;
-  room.exit.y = room.y + room.height;
+  rand_side(room, room.entry);
+  rand_side(room, room.exit);
 }
 
 bool Map::walk(Point &src, Point &target) {
@@ -231,10 +261,8 @@ bool Map::walk(Point &src, Point &target) {
       "target room has a wall at entry door");
 
   make_paths();
-
   bool found = false;
   Point out{src.x, src.y};
-
   do {
     m_walls[out.y][out.x] = INV_SPACE;
     found = neighbors(out, true);