external config

src/config.rs

@@ -0,0 +1,23 @@
+use bevy::prelude::Resource;
+use serde::Deserialize;
+use std::fs;
+
+#[derive(Debug, Deserialize, Clone, Resource)]
+pub struct GameConfig {
+    pub initial_chunk_radius: i32,
+    pub spawn_counts: SpawnCounts,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct SpawnCounts {
+    pub dorfs: u32,
+    pub pigs: u32,
+    pub rabbits: u32,
+}
+
+impl GameConfig {
+    pub fn load() -> Self {
+        let config_str = fs::read_to_string("config.toml").expect("Failed to find config.toml");
+        toml::from_str(&config_str).expect("Failed to parse config.toml")
+    }
+}

src/entities/livestock/pig.rs

@@ -1,3 +1,4 @@
+use crate::config::GameConfig;
 use crate::constants::TILE_SIZE;
 use crate::constants::*;
 use crate::entities::item::{spawn_prefab, MiscPrefab};
@@ -47,9 +48,10 @@ pub fn spawn_pigs(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
     mut rng_q: Query<&mut WyRand, With<GlobalRng>>,
+    config: Res<GameConfig>,
 ) {
     if let Ok(mut rng) = rng_q.single_mut() {
-        for _ in 0..5 {
+        for _ in 0..config.spawn_counts.pigs {
             let pig = commands
                 .spawn(Pig::new(
                     &asset_server,

src/entities/livestock/rabbit.rs

@@ -1,3 +1,4 @@
+use crate::config::GameConfig;
 use crate::constants::TILE_SIZE;
 use crate::constants::*;
 use crate::entities::shared_components::Ambulatory;
@@ -40,9 +41,10 @@ pub fn spawn_rabbits(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
     mut rng_q: Query<&mut WyRand, With<GlobalRng>>,
+    config: Res<GameConfig>,
 ) {
     if let Ok(mut rng) = rng_q.single_mut() {
-        for _ in 0..15 {
+        for _ in 0..config.spawn_counts.rabbits {
             let rab = commands
                 .spawn(Rabbit::new(
                     &asset_server,

src/entities/sentient/dorf.rs

@@ -1,3 +1,4 @@
+use crate::config::GameConfig;
 use crate::constants::TILE_SIZE;
 use crate::constants::*;
 use crate::entities::shared_components::Ambulatory;
@@ -40,10 +41,10 @@ pub fn spawn_dorfs(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
     mut rng_q: Query<&mut WyRand, With<GlobalRng>>,
+    config: Res<GameConfig>,
 ) {
     if let Ok(mut rng) = rng_q.single_mut() {
-        // Spawn a handful of dorfs
-        for _ in 0..40 {
+        for _ in 0..config.spawn_counts.dorfs {
             let cit = commands
                 .spawn(Dorf::new(
                     &asset_server,

src/main.rs

@@ -7,6 +7,7 @@ use crate::entities::{
 };
 
 mod camera;
+mod config;
 mod constants;
 mod cursor;
 mod entities;
@@ -14,7 +15,10 @@ mod game;
 mod world;
 
 fn main() {
+    let game_config = config::GameConfig::load();
+
     App::new()
+        .insert_resource(game_config)
         .insert_resource(game::ZIndex(0.0))
         .insert_resource(world::tiles::CurrentWorldSpriteState {
             state: world::tiles::TerrainSpriteState::Inactive,

src/world/mod.rs

@@ -1,5 +1,6 @@
 use crate::{
     camera,
+    config::GameConfig,
     world::generation::{
         generate_chunk_fauna, generate_chunk_foliage, generate_chunk_forrestry,
         generate_chunk_terrain, generate_chunk_weathering_and_precipitation,
@@ -69,9 +70,13 @@ impl Plugin for WorldPlugin {
     }
 }
 
-fn setup_initial_chunks(mut event_writer: MessageWriter<GenerateChunkEvent>) {
-    for x in -15..=15 {
-        for y in -15..=15 {
+fn setup_initial_chunks(
+    mut event_writer: MessageWriter<GenerateChunkEvent>,
+    config: Res<GameConfig>,
+) {
+    let radius = config.initial_chunk_radius;
+    for x in -radius..=radius {
+        for y in -radius..=radius {
             event_writer.write(GenerateChunkEvent {
                 chunk_position: IVec2::new(x, y),
             });