Add the Dark elf city

src/map_builders.rs

@@ -6,6 +6,7 @@ mod bsp_interior;
 mod cellular_automata;
 mod common;
 mod cull_unreachable;
+mod dark_elves;
 mod distant_exit;
 mod dla;
 mod door_placement;
@@ -42,6 +43,7 @@ use bsp_dungeon::BspDungeonBuilder;
 use bsp_interior::BspInteriorBuilder;
 use cellular_automata::CellularAutomataBuilder;
 use cull_unreachable::CullUnreachable;
+use dark_elves::*;
 use distant_exit::DistantExit;
 use dla::DLABuilder;
 use door_placement::DoorPlacement;
@@ -354,6 +356,7 @@ pub fn level_builder(new_depth: i32, width: i32, height: i32) -> BuilderChain {
         7 => mushroom_entrance(new_depth, width, height),
         8 => mushroom_builder(new_depth, width, height),
         9 => mushroom_exit(new_depth, width, height),
+        10 => dark_elf_city(new_depth, width, height),
         _ => random_builder(new_depth, width, height),
     }
 }

src/map_builders/dark_elves.rs

@@ -0,0 +1,17 @@
+use super::{
+    AreaEndingPosition, AreaStartingPosition, BspInteriorBuilder, BuilderChain, CullUnreachable,
+    VoronoiSpawning, XEnd, XStart, YEnd, YStart,
+};
+
+pub fn dark_elf_city(new_depth: i32, width: i32, height: i32) -> BuilderChain {
+    let mut chain = BuilderChain::new(new_depth, width, height, "Dark Elven City");
+    chain
+        .start_with(BspInteriorBuilder::new())
+        .with(AreaStartingPosition::new(XStart::Center, YStart::Center))
+        .with(CullUnreachable::new())
+        .with(AreaStartingPosition::new(XStart::Right, YStart::Center))
+        .with(AreaEndingPosition::new(XEnd::Left, YEnd::Center))
+        .with(VoronoiSpawning::new());
+
+    chain
+}