Create a rough town map generator, starting section 5.4

src/camera.rs

@@ -1,5 +1,5 @@
-use rltk::{Point, Rltk, RGB};
-use specs::prelude::*;
+use ::rltk::{Point, Rltk, RGB};
+use ::specs::prelude::*;
 
 use crate::{Hidden, Map, Position, Renderable, TileType};
 
@@ -127,25 +127,22 @@ pub fn render_debug_map(map: &Map, ctx: &mut Rltk) {
 }
 
 fn get_tile_glyph(idx: usize, map: &Map) -> (rltk::FontCharType, RGB, RGB) {
-    let glyph;
-    let mut fg;
     let mut bg = RGB::from_f32(0., 0., 0.);
 
-    match map.tiles[idx] {
-        TileType::Floor => {
-            glyph = rltk::to_cp437('.');
-            fg = RGB::from_f32(0., 0.5, 0.5);
-        }
+    let (glyph, mut fg) = match map.tiles[idx] {
+        TileType::Floor => (rltk::to_cp437('.'), RGB::from_f32(0., 0.5, 0.5)),
+        TileType::WoodFloor => (rltk::to_cp437('.'), RGB::named(rltk::CHOCOLATE)),
         TileType::Wall => {
             let x = idx as i32 % map.width;
             let y = idx as i32 / map.width;
-            glyph = wall_glyph(&*map, x, y);
-            fg = RGB::from_f32(0., 1.0, 0.);
-        }
-        TileType::DownStairs => {
-            glyph = rltk::to_cp437('>');
-            fg = RGB::from_f32(0., 1.0, 1.0);
+            (wall_glyph(&*map, x, y), RGB::from_f32(0., 1.0, 0.))
         }
+        TileType::DownStairs => (rltk::to_cp437('>'), RGB::from_f32(0., 1.0, 1.0)),
+        TileType::Bridge => (rltk::to_cp437('.'), RGB::named(rltk::CHOCOLATE)),
+        TileType::Road => (rltk::to_cp437('~'), RGB::named(rltk::GRAY)),
+        TileType::Grass => (rltk::to_cp437('"'), RGB::named(rltk::GREEN)),
+        TileType::ShallowWater => (rltk::to_cp437('≈'), RGB::named(rltk::CYAN)),
+        TileType::DeepWater => (rltk::to_cp437('≈'), RGB::named(rltk::NAVY_BLUE)),
     };
 
     if map.bloodstains.contains(&idx) {

src/main.rs

@@ -24,6 +24,9 @@ mod visibility_system;
 #[macro_use]
 extern crate lazy_static;
 
+use ::rltk::{GameState, Point, RandomNumberGenerator, Rltk};
+use ::specs::prelude::*;
+use ::specs::saveload::{SimpleMarker, SimpleMarkerAllocator};
 use components::*;
 use damage_system::DamageSystem;
 pub use game_log::GameLog;
@@ -34,9 +37,6 @@ use melee_combat_system::MeleeCombatSystem;
 use monster_ai_system::MonsterAI;
 use player::*;
 pub use rect::Rect;
-use rltk::{GameState, Point, RandomNumberGenerator, Rltk};
-use specs::prelude::*;
-use specs::saveload::{SimpleMarker, SimpleMarkerAllocator};
 use visibility_system::VisibilitySystem;
 
 /// Cut down on the amount of syntax to register components
@@ -450,7 +450,7 @@ impl State {
         self.mapgen_history.clear();
 
         let mut rng = self.ecs.write_resource::<RandomNumberGenerator>();
-        let mut builder = map_builders::random_builder(new_depth, &mut rng, 80, 50);
+        let mut builder = map_builders::level_builder(new_depth, &mut rng, 80, 50);
         builder.build_map(&mut rng);
 
         std::mem::drop(rng);

src/map.rs

@@ -1,15 +1,13 @@
+mod tiletype;
+
 use std::collections::HashSet;
 
-use rltk::{Algorithm2D, BaseMap, Point, SmallVec};
-use serde::{Deserialize, Serialize};
-use specs::prelude::*;
+use ::rltk::{Algorithm2D, BaseMap, Point, SmallVec};
+use ::serde::{Deserialize, Serialize};
+use ::specs::prelude::*;
+pub use tiletype::{tile_opaque, tile_walkable, TileType};
 
-#[derive(PartialEq, Eq, Hash, Copy, Clone, Serialize, Deserialize)]
-pub enum TileType {
-    Wall,
-    Floor,
-    DownStairs,
-}
+use crate::map::tiletype::tile_cost;
 
 #[derive(Default, Serialize, Deserialize, Clone)]
 pub struct Map {
@@ -45,7 +43,7 @@ impl Map {
 
     pub fn populate_blocked(&mut self) {
         for (i, tile) in self.tiles.iter_mut().enumerate() {
-            self.blocked[i] = *tile == TileType::Wall;
+            self.blocked[i] = !tile_walkable(*tile);
         }
     }
 
@@ -76,7 +74,11 @@ impl Map {
 
 impl BaseMap for Map {
     fn is_opaque(&self, idx: usize) -> bool {
-        self.tiles[idx] == TileType::Wall || self.view_blocked.contains(&idx)
+        if idx > 0 && idx < self.tiles.len() {
+            tile_opaque(self.tiles[idx]) || self.view_blocked.contains(&idx)
+        } else {
+            true
+        }
     }
 
     fn get_available_exits(&self, idx: usize) -> SmallVec<[(usize, f32); 10]> {
@@ -84,33 +86,34 @@ impl BaseMap for Map {
         let x = idx as i32 % self.width;
         let y = idx as i32 / self.width;
         let w = self.width as usize;
+        let tt = self.tiles[idx];
 
         // Cardinal directions
         if self.is_exit_valid(x - 1, y) {
-            exits.push((idx - 1, 1.0))
+            exits.push((idx - 1, tile_cost(tt)))
         };
         if self.is_exit_valid(x + 1, y) {
-            exits.push((idx + 1, 1.0))
+            exits.push((idx + 1, tile_cost(tt)))
         };
         if self.is_exit_valid(x, y - 1) {
-            exits.push((idx - w, 1.0))
+            exits.push((idx - w, tile_cost(tt)))
         };
         if self.is_exit_valid(x, y + 1) {
-            exits.push((idx + w, 1.0))
+            exits.push((idx + w, tile_cost(tt)))
         };
 
         // Diagonals
         if self.is_exit_valid(x - 1, y - 1) {
-            exits.push(((idx - w) - 1, 1.45));
+            exits.push(((idx - w) - 1, tile_cost(tt) * 1.45));
         }
         if self.is_exit_valid(x + 1, y - 1) {
-            exits.push(((idx - w) + 1, 1.45));
+            exits.push(((idx - w) + 1, tile_cost(tt) * 1.45));
         }
         if self.is_exit_valid(x - 1, y + 1) {
-            exits.push(((idx + w) - 1, 1.45));
+            exits.push(((idx + w) - 1, tile_cost(tt) * 1.45));
         }
         if self.is_exit_valid(x + 1, y + 1) {
-            exits.push(((idx + w) + 1, 1.45));
+            exits.push(((idx + w) + 1, tile_cost(tt) * 1.45));
         }
 
         exits

src/map/tiletype.rs

@@ -0,0 +1,40 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(PartialEq, Eq, Hash, Copy, Clone, Serialize, Deserialize)]
+pub enum TileType {
+    Wall,
+    Floor,
+    DownStairs,
+    Road,
+    Grass,
+    ShallowWater,
+    DeepWater,
+    WoodFloor,
+    Bridge,
+}
+
+pub fn tile_walkable(tt: TileType) -> bool {
+    matches!(
+        tt,
+        TileType::Floor
+            | TileType::DownStairs
+            | TileType::Road
+            | TileType::Grass
+            | TileType::ShallowWater
+            | TileType::WoodFloor
+            | TileType::Bridge
+    )
+}
+
+pub fn tile_opaque(tt: TileType) -> bool {
+    matches!(tt, TileType::Wall)
+}
+
+pub fn tile_cost(tt: TileType) -> f32 {
+    match tt {
+        TileType::Road => 0.8,
+        TileType::Grass => 1.1,
+        TileType::ShallowWater => 1.2,
+        _ => 1.0,
+    }
+}

src/map_builders.rs

@@ -23,6 +23,7 @@ mod rooms_corridors_dogleg;
 mod rooms_corridors_lines;
 mod rooms_corridors_nearest;
 mod simple_map;
+mod town;
 mod voronoi;
 mod voronoi_spawning;
 mod waveform_collapse;
@@ -53,6 +54,7 @@ use rooms_corridors_lines::StraightLineCorridors;
 use rooms_corridors_nearest::NearestCorridors;
 use simple_map::SimpleMapBuilder;
 use specs::prelude::*;
+use town::town_builder;
 use voronoi::VoronoiCellBuilder;
 use voronoi_spawning::VoronoiSpawning;
 use waveform_collapse::WaveformCollapseBuilder;
@@ -175,7 +177,7 @@ pub trait MetaMapBuilder {
     fn build_map(&mut self, rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap);
 }
 
-fn random_start_position(rng: &mut rltk::RandomNumberGenerator) -> (XStart, YStart) {
+pub fn random_start_position(rng: &mut rltk::RandomNumberGenerator) -> (XStart, YStart) {
     let x = match rng.roll_dice(1, 3) {
         1 => XStart::Left,
         2 => XStart::Center,
@@ -330,3 +332,16 @@ pub fn random_builder(
 
     builder
 }
+
+pub fn level_builder(
+    new_depth: i32,
+    rng: &mut RandomNumberGenerator,
+    width: i32,
+    height: i32,
+) -> BuilderChain {
+    rltk::console::log(format!("Depth: {}", new_depth));
+    match new_depth {
+        1 => town_builder(new_depth, rng, width, height),
+        _ => random_builder(new_depth, rng, width, height),
+    }
+}

src/map_builders/area_starting_points.rs

@@ -1,7 +1,7 @@
 use rltk::RandomNumberGenerator;
 
 use crate::map_builders::{BuilderMap, MetaMapBuilder};
-use crate::{Position, TileType};
+use crate::{map, Position};
 
 #[allow(dead_code)]
 pub enum XStart {
@@ -49,7 +49,7 @@ impl AreaStartingPosition {
 
         let mut available_floors: Vec<(usize, f32)> = Vec::new();
         for (idx, tiletype) in build_data.map.tiles.iter().enumerate() {
-            if *tiletype == TileType::Floor {
+            if map::tile_walkable(*tiletype) {
                 available_floors.push((
                     idx,
                     rltk::DistanceAlg::PythagorasSquared.distance2d(

src/map_builders/town.rs

@@ -0,0 +1,89 @@
+use rltk::RandomNumberGenerator;
+
+use super::{BuilderChain, BuilderMap, InitialMapBuilder};
+use crate::map_builders::area_starting_points::AreaStartingPosition;
+use crate::map_builders::distant_exit::DistantExit;
+use crate::TileType;
+
+pub fn town_builder(
+    new_depth: i32,
+    rng: &mut RandomNumberGenerator,
+    width: i32,
+    height: i32,
+) -> BuilderChain {
+    let (start_x, start_y) = super::random_start_position(rng);
+    let mut chain = BuilderChain::new(new_depth, width, height);
+
+    chain
+        .start_with(TownBuilder::new())
+        .with(AreaStartingPosition::new(start_x, start_y))
+        .with(DistantExit::new());
+
+    chain
+}
+
+pub struct TownBuilder {}
+
+impl InitialMapBuilder for TownBuilder {
+    #[allow(dead_code)]
+    fn build_map(&mut self, rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap) {
+        self.build_rooms(rng, build_data);
+    }
+}
+
+impl TownBuilder {
+    pub fn new() -> Box<TownBuilder> {
+        Box::new(TownBuilder {})
+    }
+
+    pub fn build_rooms(&mut self, rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap) {
+        self.grass_layer(build_data);
+        self.water_and_piers(rng, build_data);
+
+        // Make visible for screenshot
+        for t in build_data.map.visible_tiles.iter_mut() {
+            *t = true;
+        }
+        build_data.take_snapshot();
+    }
+
+    fn grass_layer(&mut self, build_data: &mut BuilderMap) {
+        // We'll start with a nice layer of grass
+        for t in build_data.map.tiles.iter_mut() {
+            *t = TileType::Grass
+        }
+        build_data.take_snapshot();
+    }
+
+    fn water_and_piers(&mut self, rng: &mut RandomNumberGenerator, build_data: &mut BuilderMap) {
+        let mut n = (rng.roll_dice(1, 65535) as f32) / 65535_f32;
+        let mut water_width: Vec<i32> = Vec::new();
+
+        for y in 0..build_data.height {
+            let n_water = (f32::sin(n) * 10.0) as i32 + 14 + rng.roll_dice(1, 6);
+            water_width.push(n_water);
+            n += 0.1;
+
+            for x in 0..n_water {
+                let idx = build_data.map.xy_idx(x, y);
+                build_data.map.tiles[idx] = TileType::DeepWater;
+            }
+
+            for x in n_water..n_water + 3 {
+                let idx = build_data.map.xy_idx(x, y);
+                build_data.map.tiles[idx] = TileType::ShallowWater;
+            }
+        }
+        build_data.take_snapshot();
+
+        // Add piers
+        for _i in 0..rng.roll_dice(1, 4) + 6 {
+            let y = rng.roll_dice(1, build_data.height) - 1;
+            for x in 2 + rng.roll_dice(1, 6)..water_width[y as usize] + 4 {
+                let idx = build_data.map.xy_idx(x, y);
+                build_data.map.tiles[idx] = TileType::WoodFloor;
+            }
+        }
+        build_data.take_snapshot();
+    }
+}

src/raws/spawn_table_structs.rs

@@ -1,7 +1,5 @@
 use serde::Deserialize;
 
-use super::Renderable;
-
 #[derive(Deserialize, Debug)]
 pub struct SpawnTableEntry {
     pub name: String,