cargo fmt

examples/bsp_interior.rs

@@ -1,6 +1,5 @@
-use rand::prelude::*;
 use mapgen::*;
-
+use rand::prelude::*;
 
 fn main() {
     let mut rng = StdRng::seed_from_u64(907647352);

examples/bsp_rooms.rs

@@ -1,10 +1,11 @@
-use std::time::{SystemTime, UNIX_EPOCH};
-use rand::prelude::*;
 use mapgen::*;
-
+use rand::prelude::*;
+use std::time::{SystemTime, UNIX_EPOCH};
 
 fn main() {
-    let system_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Can't access system time");
+    let system_time = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .expect("Can't access system time");
     let mut rng = StdRng::seed_from_u64(system_time.as_millis() as u64);
     let gen = BspRooms::<NoData>::new();
     let map = gen.modify_map(&mut rng, &Map::new(80, 50));

examples/example1.rs

@@ -1,17 +1,10 @@
 use mapgen::{
-    MapBuilder,
-    NoData,
     filter::{
-        NoiseGenerator, 
+        AreaStartingPosition, CellularAutomata, CullUnreachable, NoiseGenerator, XStart, YStart,
-        CellularAutomata,
-        CullUnreachable,
-        AreaStartingPosition,
-        XStart, 
-        YStart,
     },
+    MapBuilder, NoData,
 };
 
-
 fn main() {
     let map = MapBuilder::<NoData>::new(20, 20)
         .with(NoiseGenerator::uniform())

src/dijkstra.rs

@@ -25,10 +25,9 @@
 //! ---
 //!
 
-use std::{collections::VecDeque, marker::PhantomData};
-use std::f32::MAX;
 use super::map::{BuilderData, Map};
-
+use std::f32::MAX;
+use std::{collections::VecDeque, marker::PhantomData};
 
 /// Representation of a Dijkstra flow map.
 /// map is a vector of floats, having a size equal to size_x * size_y (one per tile).
@@ -79,8 +78,12 @@ impl<D: BuilderData> DijkstraMap<D> {
                 let idx = self.xy_idx(x, y);
                 let new_depth = depth + add_depth;
                 let prev_depth = self.tiles[idx];
-                if new_depth >= prev_depth { continue; }
+                if new_depth >= prev_depth {
-                if new_depth >= self.max_depth { continue; }
+                    continue;
+                }
+                if new_depth >= self.max_depth {
+                    continue;
+                }
                 self.tiles[idx] = new_depth;
                 open_list.push_back(((x, y), new_depth));
             }
@@ -88,7 +91,7 @@ impl<D: BuilderData> DijkstraMap<D> {
     }
 
     fn xy_idx(&self, x: usize, y: usize) -> usize {
-        (y * self.size_x ) + x 
+        (y * self.size_x) + x
     }
 }
 
@@ -112,13 +115,19 @@ mod tests {
         map.starting_point = Some(Point::new(8, 1));
         let dm = DijkstraMap::new(&map);
 
-        println!("{:?}", &dm.tiles.iter().map(|&v| if v == f32::MAX {9.0} else {v}).collect::<Vec<f32>>());
+        println!(
+            "{:?}",
+            &dm.tiles
+                .iter()
+                .map(|&v| if v == f32::MAX { 9.0 } else { v })
+                .collect::<Vec<f32>>()
+        );
 
         assert_eq!(dm.size_x, 10);
         assert_eq!(dm.size_y, 3);
         for i in 0..10 {
             assert_eq!(dm.tiles[i], MAX);
-            assert_eq!(dm.tiles[2*dm.size_x + i], MAX);
+            assert_eq!(dm.tiles[2 * dm.size_x + i], MAX);
             let idx = dm.size_x + i;
             if i < 3 || i == 9 {
                 assert_eq!(dm.tiles[idx], MAX);
@@ -139,10 +148,9 @@ mod tests {
         let mut map = Map::<NoData>::from_string(map_str);
         map.starting_point = Some(Point::new(2, 2));
         let dm = DijkstraMap::new(&map);
-        let expected = [MAX, MAX, MAX, MAX,
+        let expected = [
-                        MAX, 1.45, 1.0, MAX, 
+            MAX, MAX, MAX, MAX, MAX, 1.45, 1.0, MAX, MAX, 1.0, 0.0, MAX, MAX, MAX, MAX, MAX,
-                        MAX, 1.0, 0.0, MAX, 
+        ];
-                        MAX, MAX, MAX, MAX];
 
         assert_eq!(dm.tiles, expected);
     }
@@ -158,10 +166,11 @@ mod tests {
         let mut map = Map::<NoData>::from_string(map_str);
         map.starting_point = Some(Point::new(8, 2));
         let dm = DijkstraMap::new(&map);
-        let expected = [MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, 
+        let expected = [
-                        MAX, 7.45, 6.45, 5.45, 4.45, 3.45, 2.45, 1.45, 1.0, MAX, 
+            MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, 7.45, 6.45, 5.45, 4.45, 3.45,
-                        MAX, 7.9, 6.9, MAX, 4.0, 3.0, 2.0, 1.0, 0.0, MAX, 
+            2.45, 1.45, 1.0, MAX, MAX, 7.9, 6.9, MAX, 4.0, 3.0, 2.0, 1.0, 0.0, MAX, MAX, MAX, MAX,
-                        MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX, MAX];
+            MAX, MAX, MAX, MAX, MAX, MAX, MAX,
+        ];
 
         for (v, e) in dm.tiles.iter().zip(expected.iter()) {
             assert!(f32::abs(v - e) <= 0.01);

src/filter/bsp_interior.rs

@@ -22,12 +22,11 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
-use crate::{BuilderData, MapFilter};
 use crate::geometry::{Point, Rect};
 use crate::random::Rng;
 use crate::Map;
-
+use crate::{BuilderData, MapFilter};
+use rand::prelude::*;
 
 pub struct BspInterior<D: BuilderData> {
     min_room_size: usize,
@@ -41,9 +40,8 @@ impl<D: BuilderData> MapFilter<D> for BspInterior<D> {
 }
 
 impl<D: BuilderData> BspInterior<D> {
-
     pub fn new() -> Box<BspInterior<D>> {
-        Box::new(BspInterior{
+        Box::new(BspInterior {
             min_room_size: 8,
             phantom: PhantomData,
         })
@@ -52,7 +50,7 @@ impl<D: BuilderData> BspInterior<D> {
     fn build(&self, rng: &mut StdRng, map: &Map<D>) -> Map<D> {
         let mut new_map = map.clone();
         let mut rects: Vec<Rect> = Vec::new();
-        rects.push( Rect::new(1, 1, new_map.width-2, new_map.height-2) ); 
+        rects.push(Rect::new(1, 1, new_map.width - 2, new_map.height - 2));
         let first_room = rects[0];
         // Divide the first room
         self.add_subrects(first_room, rng, &mut rects);
@@ -64,9 +62,9 @@ impl<D: BuilderData> BspInterior<D> {
         }
 
         // Now we want corridors
-        for i in 0..new_map.rooms.len()-1 {
+        for i in 0..new_map.rooms.len() - 1 {
             let room = new_map.rooms[i];
-            let next_room = new_map.rooms[i+1];
+            let next_room = new_map.rooms[i + 1];
             let start_x = rng.random_range(room.x1, room.x2);
             let start_y = rng.random_range(room.y1, room.y2);
             let end_x = rng.random_range(next_room.x1, next_room.x2);
@@ -93,32 +91,39 @@ impl<D: BuilderData> BspInterior<D> {
 
         if split <= 2 {
             // Horizontal split
-            let h1 = Rect::new( rect.x1, rect.y1, half_width-1, height );
+            let h1 = Rect::new(rect.x1, rect.y1, half_width - 1, height);
-            rects.push( h1 );
+            rects.push(h1);
-            if half_width > self.min_room_size { self.add_subrects(h1, rng, rects); }
+            if half_width > self.min_room_size {
-            let h2 = Rect::new( rect.x1 + half_width, rect.y1, half_width, height );
+                self.add_subrects(h1, rng, rects);
-            rects.push( h2 );
+            }
-            if half_width > self.min_room_size { self.add_subrects(h2, rng, rects); }
+            let h2 = Rect::new(rect.x1 + half_width, rect.y1, half_width, height);
+            rects.push(h2);
+            if half_width > self.min_room_size {
+                self.add_subrects(h2, rng, rects);
+            }
         } else {
             // Vertical split
-            let v1 = Rect::new( rect.x1, rect.y1, width, half_height-1 );
+            let v1 = Rect::new(rect.x1, rect.y1, width, half_height - 1);
             rects.push(v1);
-            if half_height > self.min_room_size { self.add_subrects(v1, rng, rects); }
+            if half_height > self.min_room_size {
-            let v2 = Rect::new( rect.x1, rect.y1 + half_height, width, half_height );
+                self.add_subrects(v1, rng, rects);
+            }
+            let v2 = Rect::new(rect.x1, rect.y1 + half_height, width, half_height);
             rects.push(v2);
-            if half_height > self.min_room_size { self.add_subrects(v2, rng, rects); }
+            if half_height > self.min_room_size {
+                self.add_subrects(v2, rng, rects);
+            }
         }
     }
 }
 
-
 /// ------------------------------------------------------------------------------------------------
 /// Module unit tests
 /// ------------------------------------------------------------------------------------------------
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{Map, map::NoData};
+    use crate::{map::NoData, Map};
 
     #[test]
     fn no_corridors_on_borders() {
@@ -134,5 +139,4 @@ mod tests {
             assert!(map.at(79, j).is_blocked());
         }
     }
-
 }

src/filter/bsp_rooms.rs

@@ -20,13 +20,12 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
-use crate::BuilderData;
-use crate::MapFilter;
 use crate::geometry::Rect;
 use crate::random::Rng;
+use crate::BuilderData;
 use crate::Map;
-
+use crate::MapFilter;
+use rand::prelude::*;
 
 pub struct BspRooms<D: BuilderData> {
     max_split: usize,
@@ -47,11 +46,11 @@ impl<D: BuilderData> BspRooms<D> {
         })
     }
 
-    fn build_rooms(&self, map: &Map<D>, rng : &mut StdRng) -> Map<D> {
+    fn build_rooms(&self, map: &Map<D>, rng: &mut StdRng) -> Map<D> {
         let mut new_map = map.clone();
         let mut rects: Vec<Rect> = Vec::new();
         // Start with a single map-sized rectangle
-        rects.push( Rect::new(2, 2, new_map.width-5, new_map.height-5) ); 
+        rects.push(Rect::new(2, 2, new_map.width - 5, new_map.height - 5));
         let first_room = rects[0];
         rects.append(&mut self.split_into_subrects(first_room)); // Divide the first room
 
@@ -77,16 +76,33 @@ impl<D: BuilderData> BspRooms<D> {
         let half_width = usize::max(width / 2, 1);
         let half_height = usize::max(height / 2, 1);
 
-        rects.push(Rect::new( rect.x1, rect.y1, half_width, half_height ));
+        rects.push(Rect::new(rect.x1, rect.y1, half_width, half_height));
-        rects.push(Rect::new( rect.x1, rect.y1 + half_height, half_width, half_height ));
+        rects.push(Rect::new(
-        rects.push(Rect::new( rect.x1 + half_width, rect.y1, half_width, half_height ));
+            rect.x1,
-        rects.push(Rect::new( rect.x1 + half_width, rect.y1 + half_height, half_width, half_height ));
+            rect.y1 + half_height,
+            half_width,
+            half_height,
+        ));
+        rects.push(Rect::new(
+            rect.x1 + half_width,
+            rect.y1,
+            half_width,
+            half_height,
+        ));
+        rects.push(Rect::new(
+            rect.x1 + half_width,
+            rect.y1 + half_height,
+            half_width,
+            half_height,
+        ));
 
         rects
     }
 
-    fn get_random_rect(&self, rng : &mut StdRng, rects: &Vec<Rect>) -> Rect {
+    fn get_random_rect(&self, rng: &mut StdRng, rects: &Vec<Rect>) -> Rect {
-        if rects.len() == 1 { return rects[0]; }
+        if rects.len() == 1 {
+            return rects[0];
+        }
         let idx = rng.random_range(0, rects.len());
         rects[idx]
     }
@@ -117,15 +133,25 @@ impl<D: BuilderData> BspRooms<D> {
         let mut can_build = true;
 
         for r in map.rooms.iter() {
-            if r.intersect(&rect) { can_build = false; }
+            if r.intersect(&rect) {
+                can_build = false;
+            }
         }
 
-        for y in expanded.y1 ..= expanded.y2 {
+        for y in expanded.y1..=expanded.y2 {
-            for x in expanded.x1 ..= expanded.x2 {
+            for x in expanded.x1..=expanded.x2 {
-                if x > map.width - 2 { can_build = false; }
+                if x > map.width - 2 {
-                if y > map.height - 2 { can_build = false; }
+                    can_build = false;
-                if x < 1 { can_build = false; }
+                }
-                if y < 1 { can_build = false; }
+                if y > map.height - 2 {
+                    can_build = false;
+                }
+                if x < 1 {
+                    can_build = false;
+                }
+                if y < 1 {
+                    can_build = false;
+                }
                 if can_build {
                     if map.at(x as usize, y as usize).is_walkable() {
                         can_build = false;
@@ -160,5 +186,4 @@ mod tests {
             assert!(map.at(79, j).is_blocked());
         }
     }
-
 }

src/filter/cellular_automata.rs

@@ -23,11 +23,10 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
 use crate::BuilderData;
 use crate::MapFilter;
 use crate::{Map, Tile};
-
+use rand::prelude::*;
 
 /// Map filter
 pub struct CellularAutomata<D: BuilderData> {
@@ -59,26 +58,31 @@ impl<D: BuilderData> CellularAutomata<D> {
 
         new_map
     }
-
 }
 
 fn apply_iteration<D: BuilderData>(map: &Map<D>) -> Map<D> {
     let mut new_map = map.clone();
 
-    for y in 1..map.height-1 {
+    for y in 1..map.height - 1 {
-        for x in 1..map.width-1 {
+        for x in 1..map.width - 1 {
             let idxs = [
-                (x-1, y-1), (x, y-1), (x+1, y-1), 
+                (x - 1, y - 1),
-                (x-1, y), (x+1, y), 
+                (x, y - 1),
-                (x-1, y+1), (x, y+1), (x+1, y+1)];
+                (x + 1, y - 1),
-            let neighbors = idxs.iter()
+                (x - 1, y),
+                (x + 1, y),
+                (x - 1, y + 1),
+                (x, y + 1),
+                (x + 1, y + 1),
+            ];
+            let neighbors = idxs
+                .iter()
                 .filter(|(x, y)| map.at(*x, *y).is_blocked())
                 .count();
 
             if neighbors > 4 || neighbors == 0 {
                 new_map.set_tile(x, y, Tile::wall())
-            }
+            } else {
-            else {
                 new_map.set_tile(x, y, Tile::floor());
             }
         }
@@ -103,7 +107,6 @@ mod tests {
         assert!(new_map.at(1, 1).is_blocked());
     }
 
-
     #[test]
     fn test_iteration_floor() {
         let mut map = Map::<NoData>::new(3, 3);
@@ -115,5 +118,4 @@ mod tests {
         let new_map = apply_iteration(&map);
         assert!(new_map.at(1, 1).is_walkable());
     }
-
 }

src/filter/cull_unreachable.rs

@@ -6,11 +6,10 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::StdRng;
+use crate::dijkstra::DijkstraMap;
 use crate::MapFilter;
 use crate::{BuilderData, Map, Tile};
-use crate::dijkstra::DijkstraMap;
+use rand::prelude::StdRng;
-
 
 /// Remove unreachable areas from the map.
 pub struct CullUnreachable<D: BuilderData> {
@@ -53,11 +52,11 @@ impl<D: BuilderData> CullUnreachable<D> {
 /// ------------------------------------------------------------------------------------------------
 #[cfg(test)]
 mod tests {
-    use rand::prelude::*;
-    use super::*;
     use super::MapFilter;
+    use super::*;
     use crate::geometry::Point;
     use crate::map::{Map, NoData};
+    use rand::prelude::*;
 
     #[test]
     fn test_culling() {
@@ -75,7 +74,6 @@ mod tests {
         ";
         let expected_map = Map::<NoData>::from_string(expected_map_str);
 
-
         let modifier = CullUnreachable::new();
         let mut rng = StdRng::seed_from_u64(0);
         let new_map = modifier.modify_map(&mut rng, &map);

src/filter/distant_exit.rs

@@ -4,15 +4,14 @@
 //! It means that starting point have to be set before this Modyfier will start.
 //!
 
+use crate::dijkstra::DijkstraMap;
+use crate::geometry::Point;
+use crate::BuilderData;
+use crate::Map;
+use crate::MapFilter;
+use rand::prelude::StdRng;
 use std::f32;
 use std::marker::PhantomData;
-use rand::prelude::StdRng;
-use crate::BuilderData;
-use crate::geometry::Point;
-use crate::MapFilter;
-use crate::Map;
-use crate::dijkstra::DijkstraMap;
-
 
 /// Add exist position to the map based on the distance from the start point.
 pub struct DistantExit<D: BuilderData> {
@@ -57,11 +56,11 @@ impl<D: BuilderData> DistantExit<D> {
 /// ------------------------------------------------------------------------------------------------
 #[cfg(test)]
 mod tests {
-    use rand::prelude::*;
-    use super::*;
     use super::MapFilter;
+    use super::*;
     use crate::geometry::Point;
     use crate::map::{Map, NoData};
+    use rand::prelude::*;
 
     #[test]
     fn test_exit() {

src/filter/drunkard.rs

@@ -15,22 +15,24 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
 use crate::MapFilter;
 use crate::{
-    BuilderData,
-    map::{Map, Symmetry, Tile},
     geometry::Point,
-    random::Rng
+    map::{Map, Symmetry, Tile},
+    random::Rng,
+    BuilderData,
 };
-
+use rand::prelude::*;
 
 #[derive(PartialEq, Copy, Clone)]
-pub enum DrunkSpawnMode { StartingPoint, Random }
+pub enum DrunkSpawnMode {
+    StartingPoint,
+    Random,
+}
 
 pub struct DrunkardsWalk<D: BuilderData> {
-    spawn_mode : DrunkSpawnMode,
+    spawn_mode: DrunkSpawnMode,
-    drunken_lifetime : i32,
+    drunken_lifetime: i32,
     floor_percent: f32,
     brush_size: usize,
     symmetry: Symmetry,
@@ -44,13 +46,14 @@ impl<D: BuilderData> MapFilter<D> for DrunkardsWalk<D> {
 }
 
 impl<D: BuilderData> DrunkardsWalk<D> {
-    pub fn new( spawn_mode: DrunkSpawnMode, 
+    pub fn new(
+        spawn_mode: DrunkSpawnMode,
         drunken_lifetime: i32,
         floor_percent: f32,
         brush_size: usize,
-                symmetry: Symmetry) -> Box<DrunkardsWalk<D>>
+        symmetry: Symmetry,
-    {
+    ) -> Box<DrunkardsWalk<D>> {
-        Box::new(DrunkardsWalk{
+        Box::new(DrunkardsWalk {
             spawn_mode,
             drunken_lifetime,
             floor_percent,
@@ -83,7 +86,7 @@ impl<D: BuilderData> DrunkardsWalk<D> {
     fn build(&self, rng: &mut StdRng, map: &Map<D>) -> Map<D> {
         let mut new_map = map.clone();
         // Set a central starting point
-        let starting_position = Point::new( new_map.width / 2, new_map.height / 2 );
+        let starting_position = Point::new(new_map.width / 2, new_map.height / 2);
         new_map.set_tile(starting_position.x, starting_position.y, Tile::floor());
 
         let total_tiles = new_map.width * new_map.height;
@@ -116,10 +119,26 @@ impl<D: BuilderData> DrunkardsWalk<D> {
 
                 let stagger_direction = rng.roll_dice(1, 4);
                 match stagger_direction {
-                    1 => { if drunk_x > 1 { drunk_x -= 1; } }
+                    1 => {
-                    2 => { if drunk_x < new_map.width-2 { drunk_x += 1; } }
+                        if drunk_x > 1 {
-                    3 => { if drunk_y > 1 { drunk_y -=1; } }
+                            drunk_x -= 1;
-                    _ => { if drunk_y < new_map.height-2 { drunk_y += 1; } }
+                        }
+                    }
+                    2 => {
+                        if drunk_x < new_map.width - 2 {
+                            drunk_x += 1;
+                        }
+                    }
+                    3 => {
+                        if drunk_y > 1 {
+                            drunk_y -= 1;
+                        }
+                    }
+                    _ => {
+                        if drunk_y < new_map.height - 2 {
+                            drunk_y += 1;
+                        }
+                    }
                 }
 
                 drunk_life -= 1;

src/filter/maze.rs

@@ -15,13 +15,12 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
 use crate::MapFilter;
 use crate::{
     map::{BuilderData, Map, Tile},
-    random::Rng
+    random::Rng,
 };
-
+use rand::prelude::*;
 
 pub struct MazeBuilder<D: BuilderData> {
     phantom: PhantomData<D>,
@@ -43,7 +42,7 @@ impl<D: BuilderData> MazeBuilder<D> {
     #[allow(clippy::map_entry)]
     fn build(&self, rng: &mut StdRng, map: &Map<D>) -> Map<D> {
         let mut new_map = map.clone();
-        let mut maze = Grid::new((map.width as i32/ 2)-2, (map.height as i32/ 2)-2, rng);
+        let mut maze = Grid::new((map.width as i32 / 2) - 2, (map.height as i32 / 2) - 2, rng);
         maze.generate_maze(&mut new_map);
         new_map
     }
@@ -51,10 +50,10 @@ impl<D: BuilderData> MazeBuilder<D> {
 
 /* Maze code taken under MIT from https://github.com/cyucelen/mazeGenerator/ */
 
-const TOP : usize = 0;
+const TOP: usize = 0;
-const RIGHT : usize = 1;
+const RIGHT: usize = 1;
-const BOTTOM : usize = 2;
+const BOTTOM: usize = 2;
-const LEFT : usize = 3;
+const LEFT: usize = 3;
 
 #[derive(Copy, Clone)]
 struct Cell {
@@ -66,31 +65,28 @@ struct Cell {
 
 impl Cell {
     fn new(row: i32, column: i32) -> Cell {
-        Cell{
+        Cell {
             row,
             column,
             walls: [true, true, true, true],
-            visited: false
+            visited: false,
         }
     }
 
-    fn remove_walls(&mut self, next : &mut Cell) {
+    fn remove_walls(&mut self, next: &mut Cell) {
         let x = self.column - next.column;
         let y = self.row - next.row;
 
         if x == 1 {
             self.walls[LEFT] = false;
             next.walls[RIGHT] = false;
-        }
+        } else if x == -1 {
-        else if x == -1 {
             self.walls[RIGHT] = false;
             next.walls[LEFT] = false;
-        }
+        } else if y == 1 {
-        else if y == 1 {
             self.walls[TOP] = false;
             next.walls[BOTTOM] = false;
-        }
+        } else if y == -1 {
-        else if y == -1 {
             self.walls[BOTTOM] = false;
             next.walls[TOP] = false;
         }
@@ -103,13 +99,13 @@ struct Grid<'a, D: BuilderData> {
     cells: Vec<Cell>,
     backtrace: Vec<usize>,
     current: usize,
-    rng : &'a mut StdRng,
+    rng: &'a mut StdRng,
     phantom: PhantomData<D>,
 }
 
 impl<'a, D: BuilderData> Grid<'a, D> {
-    fn new(width: i32, height:i32, rng: &mut StdRng) -> Grid<D> {
+    fn new(width: i32, height: i32, rng: &mut StdRng) -> Grid<D> {
-        let mut grid = Grid{
+        let mut grid = Grid {
             width,
             height,
             cells: Vec::new(),
@@ -129,7 +125,7 @@ impl<'a, D: BuilderData> Grid<'a, D> {
     }
 
     fn calculate_index(&self, row: i32, column: i32) -> i32 {
-        if row < 0 || column < 0 || column > self.width-1 || row > self.height-1 {
+        if row < 0 || column < 0 || column > self.width - 1 || row > self.height - 1 {
             -1
         } else {
             column + (row * self.width)
@@ -137,16 +133,16 @@ impl<'a, D: BuilderData> Grid<'a, D> {
     }
 
     fn get_available_neighbors(&self) -> Vec<usize> {
-        let mut neighbors : Vec<usize> = Vec::new();
+        let mut neighbors: Vec<usize> = Vec::new();
 
         let current_row = self.cells[self.current].row;
         let current_column = self.cells[self.current].column;
 
-        let neighbor_indices : [i32; 4] = [
+        let neighbor_indices: [i32; 4] = [
-            self.calculate_index(current_row -1, current_column),
+            self.calculate_index(current_row - 1, current_column),
             self.calculate_index(current_row, current_column + 1),
             self.calculate_index(current_row + 1, current_column),
-            self.calculate_index(current_row, current_column - 1)
+            self.calculate_index(current_row, current_column - 1),
         ];
 
         for i in neighbor_indices.iter() {
@@ -164,7 +160,7 @@ impl<'a, D: BuilderData> Grid<'a, D> {
             if neighbors.len() == 1 {
                 return Some(neighbors[0]);
             } else {
-                return Some(neighbors[(self.rng.roll_dice(1, neighbors.len())-1) as usize]);
+                return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1) as usize]);
             }
         }
         None
@@ -209,17 +205,27 @@ impl<'a, D: BuilderData> Grid<'a, D> {
 
     fn copy_to_map(&self, map: &mut Map<D>) {
         // Clear the map
-        for i in map.tiles.iter_mut() { *i = Tile::wall(); }
+        for i in map.tiles.iter_mut() {
+            *i = Tile::wall();
+        }
 
         for cell in self.cells.iter() {
             let x = (cell.column as usize + 1) * 2;
             let y = (cell.row as usize + 1) * 2;
 
             map.set_tile(x, y, Tile::floor());
-            if !cell.walls[TOP] { map.set_tile(x, y-1, Tile::floor()) }
+            if !cell.walls[TOP] {
-            if !cell.walls[RIGHT] { map.set_tile(x+1, y, Tile::floor()) }
+                map.set_tile(x, y - 1, Tile::floor())
-            if !cell.walls[BOTTOM] { map.set_tile(x, y+1, Tile::floor()) }
+            }
-            if !cell.walls[LEFT] { map.set_tile(x-1, y, Tile::floor()) }
+            if !cell.walls[RIGHT] {
+                map.set_tile(x + 1, y, Tile::floor())
+            }
+            if !cell.walls[BOTTOM] {
+                map.set_tile(x, y + 1, Tile::floor())
+            }
+            if !cell.walls[LEFT] {
+                map.set_tile(x - 1, y, Tile::floor())
+            }
         }
     }
 }

src/filter/mod.rs

@@ -9,8 +9,8 @@ pub mod distant_exit;
 pub mod drunkard;
 pub mod maze;
 pub mod noise_generator;
-pub mod simple_rooms;
 pub mod rooms_corridors_nearest;
+pub mod simple_rooms;
 pub mod starting_point;
 pub mod voronoi;
 
@@ -22,8 +22,7 @@ pub use distant_exit::DistantExit;
 pub use drunkard::DrunkardsWalk;
 pub use maze::MazeBuilder;
 pub use noise_generator::NoiseGenerator;
-pub use simple_rooms::SimpleRooms;
 pub use rooms_corridors_nearest::NearestCorridors;
+pub use simple_rooms::SimpleRooms;
 pub use starting_point::{AreaStartingPosition, XStart, YStart};
 pub use voronoi::VoronoiHive;
-

src/filter/noise_generator.rs

@@ -18,10 +18,9 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
 use crate::MapFilter;
 use crate::{BuilderData, Map, Tile};
-
+use rand::prelude::*;
 
 /// Map noise generator
 pub struct NoiseGenerator<D: BuilderData> {
@@ -56,15 +55,17 @@ impl<D: BuilderData> NoiseGenerator<D> {
     fn build(&self, map: &Map<D>, rng: &mut StdRng) -> Map<D> {
         let mut new_map = map.clone();
         let p = (self.prob * 100.0) as u32;
-        for y in 1..new_map.height-1 {
+        for y in 1..new_map.height - 1 {
-            for x in 1..new_map.width-1 {
+            for x in 1..new_map.width - 1 {
                 let roll = rng.next_u32() % 100;
-                if roll > p { new_map.set_tile(x, y, Tile::floor()) } 
+                if roll > p {
-                else { new_map.set_tile(x, y, Tile::wall()) }
+                    new_map.set_tile(x, y, Tile::floor())
+                } else {
+                    new_map.set_tile(x, y, Tile::wall())
+                }
             }
         }
 
         new_map
     }
-
 }

src/filter/rooms_corridors_nearest.rs

@@ -1,13 +1,12 @@
 //! Connect nearest rooms on the map with corridors
 //!
-use rand::prelude::StdRng;
 use crate::BuilderData;
-use crate::MapFilter;
 use crate::Map;
+use crate::MapFilter;
+use rand::prelude::StdRng;
 use std::collections::HashSet;
 use std::marker::PhantomData;
 
-
 pub struct NearestCorridors<D: BuilderData> {
     phantom: PhantomData<D>,
 }
@@ -19,7 +18,6 @@ impl<D: BuilderData> MapFilter<D> for NearestCorridors<D> {
 }
 
 impl<D: BuilderData> NearestCorridors<D> {
-
     pub fn new() -> Box<NearestCorridors<D>> {
         Box::new(NearestCorridors {
             phantom: PhantomData,
@@ -29,11 +27,11 @@ impl<D: BuilderData> NearestCorridors<D> {
     fn corridors(&self, map: &Map<D>) -> Map<D> {
         let mut new_map = map.clone();
 
-        let mut connected : HashSet<usize> = HashSet::new();
+        let mut connected: HashSet<usize> = HashSet::new();
-        for (i,room) in map.rooms.iter().enumerate() {
+        for (i, room) in map.rooms.iter().enumerate() {
-            let mut room_distance : Vec<(usize, f32)> = Vec::new();
+            let mut room_distance: Vec<(usize, f32)> = Vec::new();
             let room_center = room.center();
-            for (j,other_room) in new_map.rooms.iter().enumerate() {
+            for (j, other_room) in new_map.rooms.iter().enumerate() {
                 if i != j && !connected.contains(&j) {
                     let other_center = other_room.center();
                     let distance = room_center.distance_to(&other_center);
@@ -42,7 +40,7 @@ impl<D: BuilderData> NearestCorridors<D> {
             }
 
             if !room_distance.is_empty() {
-                room_distance.sort_by(|a,b| a.1.partial_cmp(&b.1).unwrap() );
+                room_distance.sort_by(|a, b| a.1.partial_cmp(&b.1).unwrap());
                 let dest_center = new_map.rooms[room_distance[0].0].center();
                 new_map.add_corridor(room_center, dest_center);
                 connected.insert(i);

src/filter/simple_rooms.rs

@@ -20,13 +20,12 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
-use crate::BuilderData;
-use crate::MapFilter;
 use crate::geometry::Rect;
 use crate::random::Rng;
+use crate::BuilderData;
 use crate::Map;
-
+use crate::MapFilter;
+use rand::prelude::*;
 
 pub struct SimpleRooms<D: BuilderData> {
     max_rooms: usize,
@@ -41,10 +40,9 @@ impl<D: BuilderData> MapFilter<D> for SimpleRooms<D> {
     }
 }
 
-
 impl<D: BuilderData> SimpleRooms<D> {
     pub fn new() -> Box<SimpleRooms<D>> {
-        Box::new(SimpleRooms{
+        Box::new(SimpleRooms {
             max_rooms: 30,
             min_room_size: 6,
             max_room_size: 10,
@@ -52,7 +50,7 @@ impl<D: BuilderData> SimpleRooms<D> {
         })
     }
 
-    fn build_rooms(&self, map: &Map<D>, rng : &mut StdRng) -> Map<D> {
+    fn build_rooms(&self, map: &Map<D>, rng: &mut StdRng) -> Map<D> {
         let mut new_map = map.clone();
 
         // Create room dimensions

src/filter/starting_point.rs

@@ -22,23 +22,30 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::StdRng;
-use crate::BuilderData;
-use crate::MapFilter;
 use crate::geometry::Point;
+use crate::BuilderData;
 use crate::Map;
-
+use crate::MapFilter;
+use rand::prelude::StdRng;
 
 /// Initial x region position
-pub enum XStart { LEFT, CENTER, RIGHT }
+pub enum XStart {
+    LEFT,
+    CENTER,
+    RIGHT,
+}
 
 /// Initial y region position
-pub enum YStart { TOP, CENTER, BOTTOM }
+pub enum YStart {
+    TOP,
+    CENTER,
+    BOTTOM,
+}
 
 /// Add starting position to the map
 pub struct AreaStartingPosition<D: BuilderData> {
-    x : XStart, 
+    x: XStart,
-    y : YStart,
+    y: YStart,
     phantom: PhantomData<D>,
 }
 
@@ -50,43 +57,42 @@ impl<D: BuilderData> MapFilter<D> for AreaStartingPosition<D> {
 
 impl<D: BuilderData> AreaStartingPosition<D> {
     /// Create new modifier with given region
-    pub fn new(x : XStart, y : YStart) -> Box<AreaStartingPosition<D>> {
+    pub fn new(x: XStart, y: YStart) -> Box<AreaStartingPosition<D>> {
-        Box::new(AreaStartingPosition{
+        Box::new(AreaStartingPosition {
-            x, y,
+            x,
+            y,
             phantom: PhantomData,
         })
     }
 
-    fn build(&self, map : &Map<D>) -> Map<D> {
+    fn build(&self, map: &Map<D>) -> Map<D> {
         let seed_x = match self.x {
             XStart::LEFT => 1,
             XStart::CENTER => map.width / 2,
-            XStart::RIGHT => map.width - 2
+            XStart::RIGHT => map.width - 2,
         };
 
         let seed_y = match self.y {
             YStart::TOP => 1,
             YStart::CENTER => map.height / 2,
-            YStart::BOTTOM => map.height - 2
+            YStart::BOTTOM => map.height - 2,
         };
 
-        let mut available_floors : Vec<(usize, f32)> = Vec::new();
+        let mut available_floors: Vec<(usize, f32)> = Vec::new();
         for (idx, tiletype) in map.tiles.iter().enumerate() {
             if tiletype.is_walkable() {
-                available_floors.push(
+                available_floors.push((
-                    (
                     idx,
                     Point::new(idx % map.width, idx / map.width)
-                            .distance_to(&Point::new(seed_x, seed_y))
+                        .distance_to(&Point::new(seed_x, seed_y)),
-                    )
+                ));
-                );
             }
         }
         if available_floors.is_empty() {
             panic!("No valid floors to start on");
         }
 
-        available_floors.sort_by(|a,b| a.1.partial_cmp(&b.1).unwrap());
+        available_floors.sort_by(|a, b| a.1.partial_cmp(&b.1).unwrap());
 
         let start_x = available_floors[0].0 % map.width;
         let start_y = available_floors[0].0 / map.width;
@@ -102,11 +108,11 @@ impl<D: BuilderData> AreaStartingPosition<D> {
 /// ------------------------------------------------------------------------------------------------
 #[cfg(test)]
 mod tests {
-    use rand::prelude::*;
-    use super::*;
     use super::MapFilter;
+    use super::*;
     use crate::geometry::Point;
     use crate::map::{Map, NoData};
+    use rand::prelude::*;
 
     #[test]
     fn test_exit() {

src/filter/voronoi.rs

@@ -15,21 +15,19 @@
 
 use std::marker::PhantomData;
 
-use rand::prelude::*;
 use crate::MapFilter;
 use crate::{
+    geometry::Point,
     map::{BuilderData, Map, Tile},
     random::Rng,
-    geometry::Point,
 };
-
+use rand::prelude::*;
 
 pub struct VoronoiHive<D: BuilderData> {
     n_seeds: usize,
     phantom: PhantomData<D>,
 }
 
-
 impl<D: BuilderData> MapFilter<D> for VoronoiHive<D> {
     fn modify_map(&self, rng: &mut StdRng, map: &Map<D>) -> Map<D> {
         self.build(rng, map)
@@ -38,7 +36,7 @@ impl<D: BuilderData> MapFilter<D> for VoronoiHive<D> {
 
 impl<D: BuilderData> VoronoiHive<D> {
     pub fn new() -> Box<VoronoiHive<D>> {
-        Box::new(VoronoiHive{
+        Box::new(VoronoiHive {
             n_seeds: 64,
             phantom: PhantomData,
         })
@@ -48,8 +46,8 @@ impl<D: BuilderData> VoronoiHive<D> {
         let mut new_map = map.clone();
         let seeds = self.generate_seeds(rng, map.width, map.height);
 
-        let mut voronoi_distance = vec![(0, 0.0f32) ; self.n_seeds];
+        let mut voronoi_distance = vec![(0, 0.0f32); self.n_seeds];
-        let mut voronoi_membership : Vec<i32> = vec![0 ; map.width as usize * map.height as usize];
+        let mut voronoi_membership: Vec<i32> = vec![0; map.width as usize * map.height as usize];
         for (i, vid) in voronoi_membership.iter_mut().enumerate() {
             let x = i % map.width;
             let y = i / map.width;
@@ -59,20 +57,28 @@ impl<D: BuilderData> VoronoiHive<D> {
                 voronoi_distance[seed] = (seed, distance);
             }
 
-            voronoi_distance.sort_by(|a,b| a.1.partial_cmp(&b.1).unwrap());
+            voronoi_distance.sort_by(|a, b| a.1.partial_cmp(&b.1).unwrap());
 
             *vid = voronoi_distance[0].0 as i32;
         }
 
-        for y in 1..new_map.height-1 {
+        for y in 1..new_map.height - 1 {
-            for x in 1..new_map.width-1 {
+            for x in 1..new_map.width - 1 {
                 let mut neighbors = 0;
                 let my_idx = new_map.xy_idx(x, y);
                 let my_seed = voronoi_membership[my_idx];
-                if voronoi_membership[new_map.xy_idx(x-1, y)] != my_seed { neighbors += 1; }
+                if voronoi_membership[new_map.xy_idx(x - 1, y)] != my_seed {
-                if voronoi_membership[new_map.xy_idx(x+1, y)] != my_seed { neighbors += 1; }
+                    neighbors += 1;
-                if voronoi_membership[new_map.xy_idx(x, y-1)] != my_seed { neighbors += 1; }
+                }
-                if voronoi_membership[new_map.xy_idx(x, y+1)] != my_seed { neighbors += 1; }
+                if voronoi_membership[new_map.xy_idx(x + 1, y)] != my_seed {
+                    neighbors += 1;
+                }
+                if voronoi_membership[new_map.xy_idx(x, y - 1)] != my_seed {
+                    neighbors += 1;
+                }
+                if voronoi_membership[new_map.xy_idx(x, y + 1)] != my_seed {
+                    neighbors += 1;
+                }
 
                 if neighbors < 2 {
                     new_map.set_tile(x, y, Tile::floor());
@@ -88,8 +94,8 @@ impl<D: BuilderData> VoronoiHive<D> {
         let mut seeds: Vec<Point> = Vec::new();
 
         while seeds.len() < self.n_seeds {
-            let vx = rng.roll_dice(1, width-1);
+            let vx = rng.roll_dice(1, width - 1);
-            let vy = rng.roll_dice(1, height-1);
+            let vy = rng.roll_dice(1, height - 1);
             let candidate = Point::new(vx, vy);
             if !seeds.contains(&candidate) {
                 seeds.push(candidate);
@@ -98,5 +104,4 @@ impl<D: BuilderData> VoronoiHive<D> {
 
         seeds
     }
-
 }

src/geometry.rs

@@ -5,13 +5,13 @@
 #[derive(Default, PartialEq, Copy, Clone, Debug, Eq, Hash)]
 pub struct Point {
     pub x: usize,
-    pub y: usize
+    pub y: usize,
 }
 
 impl Point {
     /// Create new point
     pub fn new(x: usize, y: usize) -> Point {
-        Point {x, y}
+        Point { x, y }
     }
 
     /// Create new point from i32 coords
@@ -30,28 +30,33 @@ impl Point {
 /// Rectangle region on the map
 #[derive(PartialEq, Copy, Clone, Debug)]
 pub struct Rect {
-    pub x1 : usize,
+    pub x1: usize,
-    pub x2 : usize,
+    pub x2: usize,
-    pub y1 : usize,
+    pub y1: usize,
-    pub y2 : usize
+    pub y2: usize,
 }
 
 impl Rect {
     pub fn new(x: usize, y: usize, width: usize, height: usize) -> Rect {
-        Rect{x1:x, y1:y, x2:x+width, y2:y+height}
+        Rect {
+            x1: x,
+            y1: y,
+            x2: x + width,
+            y2: y + height,
+        }
     }
 
-    pub fn new_i32(x:i32, y: i32, width:i32, height:i32) -> Rect {
+    pub fn new_i32(x: i32, y: i32, width: i32, height: i32) -> Rect {
         Rect::new(x as usize, y as usize, width as usize, height as usize)
     }
 
     /// Returns true if this overlaps with other
-    pub fn intersect(&self, other:&Rect) -> bool {
+    pub fn intersect(&self, other: &Rect) -> bool {
         self.x1 <= other.x2 && self.x2 >= other.x1 && self.y1 <= other.y2 && self.y2 >= other.y1
     }
 
     pub fn center(&self) -> Point {
-        Point::new((self.x1 + self.x2)/2, (self.y1 + self.y2)/2)
+        Point::new((self.x1 + self.x2) / 2, (self.y1 + self.y2) / 2)
     }
 
     pub fn width(&self) -> usize {
@@ -80,7 +85,11 @@ impl Rect {
 /// assert_eq!(usize_abs(3, 5), 2);
 /// ```
 pub fn usize_abs(x: usize, y: usize) -> usize {
-    if x >= y {x - y} else {y - x}
+    if x >= y {
+        x - y
+    } else {
+        y - x
+    }
 }
 
 /// ------------------------------------------------------------------------------------------------
@@ -111,5 +120,4 @@ mod tests {
         assert_eq!(rect1.width(), 40);
         assert_eq!(rect1.height(), 30);
     }
-
 }

src/lib.rs

@@ -33,15 +33,14 @@ pub mod geometry;
 pub mod map;
 pub mod metric;
 
-pub use map::{BuilderData, Map, NoData, Symmetry, Tile};
 pub use filter::*;
+pub use map::{BuilderData, Map, NoData, Symmetry, Tile};
 
-pub (crate) mod dijkstra;
+pub(crate) mod dijkstra;
-pub (crate) mod random;
+pub(crate) mod random;
 
-use std::time::{SystemTime, UNIX_EPOCH};
 use rand::prelude::*;
-
+use std::time::{SystemTime, UNIX_EPOCH};
 
 /// Trait which should be implemented by map modifier.
 /// Modifier takes initiall map and apply changes to it.
@@ -66,14 +65,16 @@ impl<D: BuilderData> MapBuilder<D> {
         }
     }
 
-    pub fn with(&mut self, modifier : Box<dyn MapFilter<D>>) -> &mut MapBuilder<D> {
+    pub fn with(&mut self, modifier: Box<dyn MapFilter<D>>) -> &mut MapBuilder<D> {
         self.modifiers.push(modifier);
         self
     }
 
     /// Build map using random number seeded with system time
     pub fn build(&mut self) -> Map<D> {
-        let system_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Can't access system time");
+        let system_time = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .expect("Can't access system time");
         let mut rng = StdRng::seed_from_u64(system_time.as_millis() as u64);
         self.build_with_rng(&mut rng)
     }
@@ -89,7 +90,6 @@ impl<D: BuilderData> MapBuilder<D> {
 
         map
     }
-
 }
 
 /// ------------------------------------------------------------------------------------------------
@@ -101,9 +101,7 @@ mod tests {
 
     use super::*;
     use filter::{
-        CellularAutomata,
+        CellularAutomata, NoiseGenerator, {AreaStartingPosition, XStart, YStart},
-        NoiseGenerator,
-        {AreaStartingPosition, XStart, YStart},
     };
 
     #[test]
@@ -118,5 +116,4 @@ mod tests {
         assert_eq!(map.height, 50);
         assert_eq!(map.starting_point.is_some(), true);
     }
-
 }

src/map.rs

@@ -7,9 +7,8 @@
 //! specific game.
 //!
 
+use super::geometry::{usize_abs, Point, Rect};
 use std::fmt;
-use super::geometry::{Point, Rect, usize_abs};
-
 
 #[derive(PartialEq, Copy, Clone, Debug, Eq, Hash)]
 pub struct Tile {
@@ -18,8 +17,12 @@ pub struct Tile {
 }
 
 #[derive(PartialEq, Copy, Clone)]
-pub enum Symmetry { None, Horizontal, Vertical, Both }
+pub enum Symmetry {
-
+    None,
+    Horizontal,
+    Vertical,
+    Both,
+}
 
 /// Arbitrary data associated with each map
 pub trait BuilderData: Clone + Default {}
@@ -33,9 +36,9 @@ impl BuilderData for NoData {}
 /// Map data
 #[derive(Default, Clone)]
 pub struct Map<D> {
-    pub tiles : Vec<Tile>,
+    pub tiles: Vec<Tile>,
-    pub width : usize,
+    pub width: usize,
-    pub height : usize,
+    pub height: usize,
     pub starting_point: Option<Point>,
     pub exit_point: Option<Point>,
     pub rooms: Vec<Rect>,
@@ -45,7 +48,7 @@ pub struct Map<D> {
 
 impl Tile {
     pub fn new(is_blocked: bool, index: usize) -> Tile {
-        Tile { is_blocked, index}
+        Tile { is_blocked, index }
     }
 
     pub fn wall() -> Tile {
@@ -70,29 +73,34 @@ impl Tile {
 }
 
 impl<D: BuilderData> Map<D> {
-
     /// Generates an empty map, consisting entirely of solid walls
     pub fn new(width: usize, height: usize) -> Map<D> {
-        let map_tile_count = width*height;
+        let map_tile_count = width * height;
-        Map{
+        Map {
-            tiles : vec![Tile::wall(); map_tile_count],
+            tiles: vec![Tile::wall(); map_tile_count],
             width,
             height,
             starting_point: None,
             exit_point: None,
             rooms: Vec::new(),
             corridors: Vec::new(),
-            data: Default::default()
+            data: Default::default(),
         }
     }
 
     /// Create map from given string
     pub fn from_string(map_string: &str) -> Map<D> {
-        let lines: Vec<&str> = map_string.split("\n")
+        let lines: Vec<&str> = map_string
+            .split("\n")
             .map(|l| l.trim())
             .filter(|l| l.len() > 0)
             .collect();
-        let cols = lines.iter().map(|l| l.len()).max().get_or_insert(1).to_owned();
+        let cols = lines
+            .iter()
+            .map(|l| l.len())
+            .max()
+            .get_or_insert(1)
+            .to_owned();
         let rows = lines.len();
         let mut map = Map::new(cols, rows);
 
@@ -122,22 +130,38 @@ impl<D: BuilderData> Map<D> {
         let mut exits = Vec::new();
 
         // Cardinal directions
-        if x > 0 && self.is_exit_valid(x-1, y) { exits.push((x-1, y, 1.0)) };
+        if x > 0 && self.is_exit_valid(x - 1, y) {
-        if self.is_exit_valid(x+1, y) { exits.push((x+1, y, 1.0)) };
+            exits.push((x - 1, y, 1.0))
-        if y > 0 && self.is_exit_valid(x, y-1) { exits.push((x, y-1, 1.0)) };
+        };
-        if self.is_exit_valid(x, y+1) { exits.push((x, y+1, 1.0)) };
+        if self.is_exit_valid(x + 1, y) {
+            exits.push((x + 1, y, 1.0))
+        };
+        if y > 0 && self.is_exit_valid(x, y - 1) {
+            exits.push((x, y - 1, 1.0))
+        };
+        if self.is_exit_valid(x, y + 1) {
+            exits.push((x, y + 1, 1.0))
+        };
 
         // Diagonals
-        if x > 0 && y > 0 && self.is_exit_valid(x-1, y-1) { exits.push((x-1, y-1, 1.45)); }
+        if x > 0 && y > 0 && self.is_exit_valid(x - 1, y - 1) {
-        if y > 0 && self.is_exit_valid(x+1, y-1) { exits.push((x+1, y-1, 1.45)); }
+            exits.push((x - 1, y - 1, 1.45));
-        if x > 0 && self.is_exit_valid(x-1, y+1) { exits.push((x-1, y+1, 1.45)); }
+        }
-        if self.is_exit_valid(x+1, y+1) { exits.push((x+1, y+1, 1.45)); }
+        if y > 0 && self.is_exit_valid(x + 1, y - 1) {
+            exits.push((x + 1, y - 1, 1.45));
+        }
+        if x > 0 && self.is_exit_valid(x - 1, y + 1) {
+            exits.push((x - 1, y + 1, 1.45));
+        }
+        if self.is_exit_valid(x + 1, y + 1) {
+            exits.push((x + 1, y + 1, 1.45));
+        }
 
         exits
     }
 
     // Check if given tile can be accessed
-    fn is_exit_valid(&self, x:usize, y:usize) -> bool {
+    fn is_exit_valid(&self, x: usize, y: usize) -> bool {
         self.at(x, y).is_blocked == false
     }
 
@@ -164,7 +188,7 @@ impl<D: BuilderData> Map<D> {
         self.rooms.push(rect);
     }
 
-    pub fn add_corridor(&mut self, from: Point, to:Point) {
+    pub fn add_corridor(&mut self, from: Point, to: Point) {
         let mut corridor = Vec::new();
         let mut x = from.x;
         let mut y = from.y;
@@ -234,9 +258,13 @@ impl<D: BuilderData> Map<D> {
             }
             _ => {
                 let half_brush_size = brush_size / 2;
-                for brush_y in y-half_brush_size .. y+half_brush_size {
+                for brush_y in y - half_brush_size..y + half_brush_size {
-                    for brush_x in x-half_brush_size .. x+half_brush_size {
+                    for brush_x in x - half_brush_size..x + half_brush_size {
-                        if brush_x > 1 && brush_x < self.width-1 && brush_y > 1 && brush_y < self.height-1 {
+                        if brush_x > 1
+                            && brush_x < self.width - 1
+                            && brush_y > 1
+                            && brush_y < self.height - 1
+                        {
                             self.set_tile(brush_x, brush_y, Tile::floor());
                         }
                     }
@@ -250,7 +278,7 @@ impl<D: BuilderData> fmt::Display for Map<D> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         for y in 0..self.height {
             let bytes: Vec<u8> = (0..self.width)
-                .map(|x| if self.at(x, y).is_blocked {'#'} else {' '} as u8)
+                .map(|x| if self.at(x, y).is_blocked { '#' } else { ' ' } as u8)
                 .collect();
             let line = String::from_utf8(bytes).expect("Can't convert map to string");
             let _ = write!(f, "{}\n", line);
@@ -347,7 +375,6 @@ mod tests {
         assert_eq!(map.tiles, expected_map.tiles);
     }
 
-
     #[test]
     fn test_available_exists() {
         let map_str = "

src/metric.rs

@@ -4,28 +4,24 @@
 //! and the provide generator score as an average.
 //!
 
-use super::BuilderData;
-use super::map::Map;
 use super::dijkstra::DijkstraMap;
-
+use super::map::Map;
+use super::BuilderData;
 
 /// This metric calculates the percentage of walkable cells (Floor).
 /// If this number is very low (like < 10%) then it means that the map
 /// is probably to degenerated and shouldn't be used
 pub fn density<D>(map: &Map<D>) -> f32 {
-    let floor_count = map.tiles.iter()
+    let floor_count = map.tiles.iter().filter(|&t| t.is_walkable()).count();
-        .filter(|&t| t.is_walkable())
-        .count();
     floor_count as f32 / map.tiles.len() as f32
 }
 
-
 /// Calculate the length of the shortes path from the starting point
 /// to the exit.
 /// If this path is very short, then the map is probably degenerated.
 pub fn path_length<D: BuilderData>(map: &Map<D>) -> f32 {
     if map.starting_point.is_none() {
-        return 0.0
+        return 0.0;
     }
 
     match map.exit_point {
@@ -33,11 +29,10 @@ pub fn path_length<D: BuilderData>(map: &Map<D>) -> f32 {
         Some(exit) => {
             let dijkstra = DijkstraMap::new(map);
             dijkstra.tiles[map.xy_idx(exit.x, exit.y)]
-        },
+        }
     }
 }
 
-
 /// ------------------------------------------------------------------------------------------------
 /// Module unit tests
 /// ------------------------------------------------------------------------------------------------
@@ -46,7 +41,6 @@ mod tests {
     use super::*;
     use crate::{geometry::Point, map::NoData};
 
-
     #[test]
     fn test_density_no_floor() {
         let map = Map::<NoData>::new(10, 10);
@@ -87,8 +81,8 @@ mod tests {
             ##########
             ";
         let mut map = Map::<NoData>::from_string(map_str);
-        map.starting_point = Some(Point::new(1,1));
+        map.starting_point = Some(Point::new(1, 1));
-        map.exit_point = Some(Point::new(8,1));
+        map.exit_point = Some(Point::new(8, 1));
 
         let score = path_length(&map);
         assert!(f32::abs(score - 7.9) <= 0.01);

src/random.rs

@@ -11,7 +11,7 @@ pub trait Rng {
 
 impl Rng for StdRng {
     fn roll_dice(&mut self, min: usize, max: usize) -> usize {
-        self.random_range(min, max+1)
+        self.random_range(min, max + 1)
     }
 
     fn random_range(&mut self, start: usize, end: usize) -> usize {
@@ -29,8 +29,8 @@ impl Rng for StdRng {
 /// ------------------------------------------------------------------------------------------------
 #[cfg(test)]
 mod tests {
-    use rand::prelude::*;
     use super::Rng;
+    use rand::prelude::*;
 
     #[test]
     fn test_range() {
@@ -64,5 +64,4 @@ mod tests {
         assert_eq!(min, 1);
         assert_eq!(max, 7);
     }
-
 }