Refactor map

src/inventory_system.rs

@@ -91,7 +91,7 @@ impl<'a> System<'a> for ItemUseSystem {
             healing,
             inflicts_damage,
             _ranged,
-            mut map,
+            map,
             mut suffer_damage,
             aoe,
             mut confused,

src/main.rs

@@ -30,7 +30,7 @@ mod healing_system;
 mod hunger_system;
 mod inventory_system;
 mod map;
-mod map_builders;
+pub mod map_builders;
 mod map_indexing_system;
 mod melee_combat_system;
 mod monster_ai_system;
@@ -84,20 +84,22 @@ impl State {
         }
 
         // Build a new map and place the player
+        let mut map_builder = map_builders::new_random_builder(1);
         let worldmap;
+        let player_start;
         {
             let mut worldmap_resource = self.ecs.write_resource::<Map>();
-            *worldmap_resource = map_builders::build_random_map(1);
+            map_builder.build_map();
+            *worldmap_resource = map_builder.get_map();
+            player_start = map_builder.get_starting_position();
             worldmap = worldmap_resource.clone();
         }
 
         // Spawn bad guys
-        for room in worldmap.rooms.iter().skip(1) {
-            spawner::spawn_room(&mut self.ecs, room, 1);
-        }
+        map_builder.spawn_entities(&mut self.ecs);
 
         // Place the player and update resources
-        let (player_x, player_y) = worldmap.rooms[0].center();
+        let (player_x, player_y) = (player_start.x, player_start.y);
         let player_entity = spawner::player(&mut self.ecs, player_x, player_y);
         let mut player_position = self.ecs.write_resource::<Point>();
         *player_position = Point::new(player_x, player_y);
@@ -165,20 +167,23 @@ impl State {
                 .expect("Unable to delete entity")
         }
 
+        let mut map_builder;
         let worldmap;
         let current_depth;
+        let player_start;
         {
             let mut worldmap_resource = self.ecs.write_resource::<Map>();
             current_depth = worldmap_resource.depth;
-            *worldmap_resource = map_builders::build_random_map(current_depth + 1);
+            map_builder = map_builders::new_random_builder(current_depth + 1);
+            map_builder.build_map();
+            *worldmap_resource = map_builder.get_map();
+            player_start = map_builder.get_starting_position();
             worldmap = worldmap_resource.clone();
         }
 
-        for room in worldmap.rooms.iter().skip(1) {
-            spawner::spawn_room(&mut self.ecs, room, current_depth + 1);
-        }
+        map_builder.spawn_entities(&mut self.ecs);
 
-        let (player_x, player_y) = worldmap.rooms[0].center();
+        let (player_x, player_y) = (player_start.x, player_start.y);
         let mut player_position = self.ecs.write_resource::<Point>();
         *player_position = Point::new(player_x, player_y);
         let mut position_components = self.ecs.write_storage::<Position>();
@@ -513,14 +518,14 @@ fn main() -> rltk::BError {
 
     gs.ecs.insert(SimpleMarkerAllocator::<SerializeMe>::new());
 
-    let map = map_builders::build_random_map(1);
-    let (player_x, player_y) = map.rooms[0].center();
+    let mut map_builder = map_builders::new_random_builder(1);
+    map_builder.build_map();
+    let player_pos = map_builder.get_starting_position();
+    let mut map = map_builder.get_map();
+    let (player_x, player_y) = (player_pos.x, player_pos.y);
 
     let player_entity = spawner::player(&mut gs.ecs, player_x, player_y);
-
-    for room in map.rooms.iter().skip(1) {
-        spawner::spawn_room(&mut gs.ecs, room, 1);
-    }
+    map_builder.spawn_entities(&mut gs.ecs);
 
     gs.ecs.insert(map);
     gs.ecs.insert(Point::new(player_x, player_y));

src/map.rs

@@ -1,7 +1,6 @@
-use std::cmp::{max, min};
 use std::collections::HashSet;
 
-use rltk::{Algorithm2D, BaseMap, FontCharType, Point, RandomNumberGenerator, Rltk, RGB};
+use rltk::{Algorithm2D, BaseMap, FontCharType, Point, RGB, Rltk};
 use serde::{Deserialize, Serialize};
 use specs::prelude::*;
 
@@ -22,7 +21,6 @@ pub const MAX_MONSTER: i32 = 4;
 #[derive(Default, Serialize, Deserialize, Clone)]
 pub struct Map {
     pub tiles: Vec<TileType>,
-    pub rooms: Vec<Rect>,
     pub width: i32,
     pub height: i32,
     pub revealed_tiles: Vec<bool>,
@@ -64,7 +62,6 @@ impl Map {
     pub fn new(new_depth: i32) -> Map {
         Map {
             tiles: vec![TileType::Wall; MAP_COUNT],
-            rooms: Vec::new(),
             width: MAP_WIDTH as i32,
             height: MAP_HEIGHT as i32,
             revealed_tiles: vec![false; MAP_COUNT],

src/map_builders/mod.rs

@@ -1,13 +1,18 @@
+use specs::World;
+
+use crate::{Map, Position};
 use crate::map_builders::simple_map::SimpleMapBuilder;
-use crate::Map;
 
-mod common;
-mod simple_map;
+pub mod common;
+pub mod simple_map;
 
-trait MapBuilder {
-    fn build(new_depth: i32) -> Map;
+pub trait MapBuilder {
+    fn build_map(&mut self);
+    fn spawn_entities(&mut self, ecs: &mut World);
+    fn get_map(&self) -> Map;
+    fn get_starting_position(&self) -> Position;
 }
 
-pub fn build_random_map(new_depth: i32) -> Map {
-    SimpleMapBuilder::build(new_depth)
+pub fn new_random_builder(new_depth: i32) -> Box<dyn MapBuilder> {
+    Box::new(SimpleMapBuilder::new(new_depth))
 }

src/map_builders/simple_map.rs

@@ -1,14 +1,28 @@
 use rltk::RandomNumberGenerator;
 use specs::prelude::*;
 
+use crate::{Map, Position, spawner, TileType};
 use crate::map_builders::{common, MapBuilder};
 use crate::rect::Rect;
-use crate::{Map, TileType};
 
-pub struct SimpleMapBuilder {}
+pub struct SimpleMapBuilder {
+    map: Map,
+    starting_position: Position,
+    depth: i32,
+    rooms: Vec<Rect>,
+}
 
 impl SimpleMapBuilder {
-    fn rooms_and_corridors(map: &mut Map) {
+    pub fn new(new_depth: i32) -> Self {
+        Self {
+            starting_position: Position { x: 0, y: 0 },
+            map: Map::new(new_depth),
+            depth: new_depth,
+            rooms: Vec::new(),
+        }
+    }
+
+    fn rooms_and_corridors(&mut self) {
         const MAX_ROOMS: i32 = 30;
         const MIN_SIZE: i32 = 6;
         const MAX_SIZE: i32 = 10;
@@ -18,44 +32,59 @@ impl SimpleMapBuilder {
         for _ in 0..MAX_ROOMS {
             let w = rng.range(MIN_SIZE, MAX_SIZE);
             let h = rng.range(MIN_SIZE, MAX_SIZE);
-            let x = rng.roll_dice(1, map.width - w - 1) - 1;
-            let y = rng.roll_dice(1, map.height - h - 1) - 1;
+            let x = rng.roll_dice(1, self.map.width - w - 1) - 1;
+            let y = rng.roll_dice(1, self.map.height - h - 1) - 1;
             let new_room = Rect::new(x, y, w, h);
             let mut ok = true;
-            for other_room in map.rooms.iter() {
+            for other_room in self.rooms.iter() {
                 if new_room.intersect(other_room) {
                     ok = false
                 };
             }
             if ok {
-                common::apply_room_to_map(map, &new_room);
+                common::apply_room_to_map(&mut self.map, &new_room);
 
-                if !map.rooms.is_empty() {
+                if !self.rooms.is_empty() {
                     let (new_x, new_y) = new_room.center();
-                    let (prev_x, prev_y) = map.rooms[map.rooms.len() - 1].center();
+                    let (prev_x, prev_y) = self.rooms[self.rooms.len() - 1].center();
                     if rng.range(0, 2) == 1 {
-                        common::apply_horizontal_tunnel(map, prev_x, new_x, prev_y);
-                        common::apply_vertical_tunnel(map, prev_y, new_y, new_x);
+                        common::apply_horizontal_tunnel(&mut self.map, prev_x, new_x, prev_y);
+                        common::apply_vertical_tunnel(&mut self.map, prev_y, new_y, new_x);
                     } else {
-                        common::apply_vertical_tunnel(map, prev_y, new_y, prev_x);
-                        common::apply_horizontal_tunnel(map, prev_x, new_x, new_y);
+                        common::apply_vertical_tunnel(&mut self.map, prev_y, new_y, prev_x);
+                        common::apply_horizontal_tunnel(&mut self.map, prev_x, new_x, new_y);
                     }
                 }
 
-                map.rooms.push(new_room);
+                self.rooms.push(new_room);
             }
         }
 
-        let stairs_position = map.rooms[map.rooms.len() - 1].center();
-        let stairs_idx = map.xy_idx(stairs_position.0, stairs_position.1);
-        map.tiles[stairs_idx] = TileType::DownStairs;
+        let stairs_position = self.rooms[self.rooms.len() - 1].center();
+        let stairs_idx = self.map.xy_idx(stairs_position.0, stairs_position.1);
+        self.map.tiles[stairs_idx] = TileType::DownStairs;
+
+        let start_pos = self.rooms[0].center();
+        self.starting_position = Position { x: start_pos.0, y: start_pos.1 }
     }
 }
 
 impl MapBuilder for SimpleMapBuilder {
-    fn build(new_depth: i32) -> Map {
-        let mut map = Map::new(new_depth);
-        SimpleMapBuilder::rooms_and_corridors(&mut map);
-        map
+    fn build_map(&mut self) {
+        self.rooms_and_corridors();
+    }
+
+    fn spawn_entities(&mut self, ecs: &mut World) {
+        for room in self.rooms.iter().skip(1) {
+            spawner::spawn_room(ecs, room, self.depth);
+        }
+    }
+
+    fn get_map(&self) -> Map {
+        self.map.clone()
+    }
+
+    fn get_starting_position(&self) -> Position {
+        self.starting_position.clone()
     }
 }

src/trigger_system.rs

@@ -37,7 +37,7 @@ impl<'a> System<'a> for TriggerSystem {
             inflicts_damage,
             mut particle_builder,
             mut inflict_damage,
-            mut single_activation,
+            single_activation,
         ) = data;
 
         let mut remove_entities: Vec<Entity> = Vec::new();