Tweak door behavior, completing section 4.18

src/map_builders.rs

@@ -299,6 +299,15 @@ pub fn random_builder(new_depth: i32, rng: &mut RandomNumberGenerator) -> Builde
 
     if rng.roll_dice(1, 3) == 1 {
         builder.with(WaveformCollapseBuilder::new());
+
+        // Now set the start to a random starting area
+        let (start_x, start_y) = random_start_position(rng);
+        builder.with(AreaStartingPosition::new(start_x, start_y));
+
+        // Setup an exit and spawn mobs
+        builder
+            .with(VoronoiSpawning::new())
+            .with(DistantExit::new());
     }
 
     if rng.roll_dice(1, 20) == 1 {

src/map_builders/door_placement.rs

@@ -18,7 +18,7 @@ impl DoorPlacement {
         Box::new(DoorPlacement {})
     }
 
-    fn doors(&mut self, _rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap) {
+    fn doors(&mut self, rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap) {
         if let Some(halls_original) = &build_data.corridors {
             let halls = halls_original.clone();
             for hall in halls.iter() {
@@ -33,7 +33,10 @@ impl DoorPlacement {
             // There are no corridors - scan for possible places
             let tiles = build_data.map.tiles.clone();
             for (i, tile) in tiles.iter().enumerate() {
-                if *tile == TileType::Floor && self.door_possible(build_data, i) {
+                if *tile == TileType::Floor
+                    && self.door_possible(build_data, i)
+                    && rng.roll_dice(1, 3) == 1
+                {
                     build_data.spawn_list.push((i, "Door".to_string()));
                 }
             }
@@ -41,6 +44,13 @@ impl DoorPlacement {
     }
 
     fn door_possible(&self, build_data: &mut BuilderMap, idx: usize) -> bool {
+        // Check that there isn't already something in this tile
+        for spawn in build_data.spawn_list.iter() {
+            if spawn.0 == idx {
+                return false;
+            }
+        }
+
         let width = build_data.map.width as usize;
         let height = build_data.map.height as usize;
         let x = idx % width;