Add de-/serialization for World

3c1ce566939f54a0c8d5794033b4088c0c33cb91

Cargo.lock

@@ -2067,6 +2067,8 @@ dependencies = [
  "bevy",
  "noise",
  "rand 0.8.5",
+ "ron",
+ "serde",
 ]
 
 [[package]]

Cargo.toml

@@ -20,4 +20,4 @@ default-features = false
 
 [dependencies.bevy_pancam]
 version = "0.6.1"
-optional = true
+optional = true

save/Cargo.toml

@@ -18,3 +18,11 @@ version = "0.8.5"
 [dependencies.bevy]
 version = "0.8"
 default-features = false
+
+[dependencies.serde]
+version = "1.0"
+default-features = false
+features = ["derive"]
+
+[dependencies.ron]
+version = "0.7.1"

save/src/world.rs

@@ -1,3 +1,4 @@
+use serde::{Deserialize, Serialize};
 use std::{
     error::Error,
     f32::consts::{PI, TAU},
@@ -39,7 +40,7 @@ impl Display for WorldGenError {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Deserialize, Serialize)]
 pub struct World {
     pub width: i32,
     pub height: i32,
@@ -48,6 +49,7 @@ pub struct World {
     pub terrain: Vec<Vec<TerrainCell>>,
     continent_offsets: [Vec2; World::NUM_CONTINENTS as usize],
     continent_widths: [f32; World::NUM_CONTINENTS as usize],
+    #[serde(skip)]
     perlin: Perlin,
 }
 impl Debug for World {
@@ -73,20 +75,22 @@ impl Debug for World {
     }
 }
 
-#[derive(Debug, Clone, Default)]
-pub struct Biome {
+#[derive(Debug, Clone, Default, Deserialize, Serialize)]
+pub(crate) struct Biome {
     pub altitude: f32,
     pub rainfall: f32,
     pub temperature: f32,
 }
 
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone, Default, Deserialize, Serialize)]
 pub struct TerrainCell {
     pub altitude: f32,
     pub rainfall: f32,
     pub temperature: f32,
 
+    #[serde(skip)]
     pub rain_accumulated: f32,
+    #[serde(skip)]
     pub previous_rain_accumulated: f32,
 }
 

save/src/world_manager.rs

@@ -1,14 +1,20 @@
 #[cfg(feature = "render")]
 use crate::TerrainCell;
 use crate::{World, WorldGenError};
+use bevy::log::error;
 #[cfg(all(feature = "debug", feature = "render"))]
-use bevy::log::debug;
+use bevy::log::{debug, info};
 #[cfg(feature = "render")]
 use bevy::{
     asset::HandleId,
     render::{color::Color, texture::Image},
 };
 use rand::random;
+use std::{
+    fs::File,
+    io::{Read, Write},
+    path::Path,
+};
 
 #[derive(Debug)]
 pub struct WorldManager {
@@ -38,6 +44,43 @@ impl WorldManager {
         }
     }
 
+    pub fn save_world<P: AsRef<Path>>(&self, path: P) {
+        let world = match self.get_world() {
+            Some(world) => world,
+            None => {
+                info!("No world to save");
+                return;
+            }
+        };
+        let serialized = match ron::to_string(world) {
+            Ok(serialized) => serialized,
+            Err(err) => {
+                error!("Could not serialize world: {}", err);
+                return;
+            }
+        };
+        File::create(path).unwrap().write_all(serialized.as_bytes());
+    }
+
+    pub fn load_world<P: AsRef<Path>>(&mut self, path: P) {
+        let mut file = match File::open(path) {
+            Ok(file) => file,
+            Err(err) => {
+                error!("Could not open world file: {}", err);
+                return;
+            }
+        };
+        let mut buf = String::new();
+        file.read_to_string(&mut buf);
+        match ron::from_str(buf.as_str()) {
+            Ok(world) => self.world = Some(world),
+            Err(err) => {
+                error!("Could not deserialize world: {}", err);
+                return;
+            }
+        }
+    }
+
     #[cfg(feature = "render")]
     pub fn toggle_rainfall(&mut self) {
         #[cfg(feature = "debug")]

src/main.rs

@@ -149,9 +149,23 @@ fn handle_toolbar_button(
                         debug!("Toggling contours");
                         world_manager.toggle_contours();
                     }
-                    ToolbarButton::GenerateWorld => todo!(),
-                    ToolbarButton::SaveWorld => todo!(),
-                    ToolbarButton::LoadWorld => todo!(),
+                    ToolbarButton::GenerateWorld => {
+                        #[cfg(feature = "debug")]
+                        debug!("Generating new world");
+                        _ = world_manager
+                            .new_world()
+                            .expect("Failed to generate new world");
+                    }
+                    ToolbarButton::SaveWorld => {
+                        #[cfg(feature = "debug")]
+                        debug!("Saving world");
+                        _ = world_manager.save_world("planet.ron");
+                    }
+                    ToolbarButton::LoadWorld => {
+                        #[cfg(feature = "debug")]
+                        debug!("Loading world");
+                        _ = world_manager.load_world("planet.ron");
+                    }
                 }
                 refresh_world_texture(&mut images, &world_manager)
             }