we can now load files!

.vscode/settings.json

@@ -3,5 +3,12 @@
     "cSpell.words": [
         "msaa",
         "vsync"
-    ]
+    ],
+    "files.watcherExclude": {
+        "**/.git/objects/**": true,
+        "**/.git/subtree-cache/**": true,
+        "**/node_modules/*/**": true,
+        "**/.hg/store/**": true,
+        "**/target/**": true,
+    }
 }

.vscode/tasks.json

@@ -9,6 +9,14 @@
 			],
 			"group": "build",
 			"label": "rust: cargo build"
+		},
+		{
+			"type": "cargo",
+			"command": "run",
+			"problemMatcher": [
+				"$rustc"
+			],
+			"label": "Launch Game"
 		}
 	]
 }

game/game_logic/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 raylib = { version = "3.7", path = "../../third_party/raylib-rs/raylib" }
 sad_machine = { version = "1.0", path = "../../third_party/sm" }
+tokio = { version = "1.17.0", featurs = ["fs"] }
 log = "0.4.14"
 profiling = "1.0.5"
 serde = { version = "1.0.136", features = ["derive"] }
@@ -15,3 +16,7 @@ serde_json = "1.0.79"
 directories = "4.0.1"
 chrono = { verison = "0.4.19", features = ["serde"] }
 discord-sdk = "0.3.0"
+rust-embed = { version = "6.2.0", features = ["compression"] }
+thiserror = "1.0.30"
+# nalgebra = { version = "0.30.1", features = ["serde"] }
+approx = "0.5.1"

game/game_logic/src/asset_manager/datastore.rs

@@ -0,0 +1,8 @@
+
+/// This structure is dynamically packed with the contents of `dist` at compile time
+/// 
+/// This process allows us to only distribute a single binary, and have all the game assets stored in memory automatically.
+/// The downside of this process is that the game will require a decent amount of RAM on the client's machine (and x64).
+#[derive(rust_embed::RustEmbed)]
+#[folder = "../dist"]
+pub struct InternalData;

game/game_logic/src/asset_manager/json.rs

@@ -0,0 +1,29 @@
+use serde::de::DeserializeOwned;
+
+use super::datastore::InternalData;
+
+/// Possible errors generated when deserializing JSON data from memory
+#[derive(Debug, thiserror::Error)]
+pub enum InternalJsonLoadError {
+    /// An error occurred with the JSON data itself
+    #[error(transparent)]
+    JsonError(#[from] serde_json::Error),
+
+    /// The JSON data was not found in the internal data store
+    #[error("Could not load embedded asset: {0}")]
+    AssetNotFound(String),
+}
+
+/// Load an embedded JSON file
+pub fn load_json_structure<'a, T: DeserializeOwned>(
+    dist_path: &str,
+) -> Result<T, InternalJsonLoadError> {
+    // Load the json file from the embedded data as a string
+    let data = InternalData::get(dist_path)
+        .ok_or(InternalJsonLoadError::AssetNotFound(dist_path.to_string()))?
+        .data;
+
+    // Deserialize the json string into a rust structure
+    let json_structure: T = serde_json::from_slice(&data)?;
+    Ok(json_structure)
+}

game/game_logic/src/asset_manager/mod.rs

@@ -0,0 +1,2 @@
+pub mod datastore;
+pub mod json;

game/game_logic/src/lib.rs

@@ -1,11 +1,15 @@
 //! This file is the main entry point for the game logic.
 
-use std::borrow::Borrow;
+use crate::{asset_manager::json::load_json_structure, project_constants::ProjectConstants};
+
+#[macro_use]
+extern crate approx; // For the macro `relative_eq!`
 
-pub mod persistent;
-pub mod rendering;
-pub mod discord;
 pub mod asset_manager;
+pub mod discord;
+pub mod persistent;
+pub mod project_constants;
+pub mod rendering;
 
 /// This is the game logic entrypoint. Despite being async,
 /// this is expected to block the main thread for rendering and stuff.
@@ -14,18 +18,29 @@ pub mod asset_manager;
 pub async fn entrypoint(force_recreate_savefiles: bool) {
     log::info!("Game main thread handed off to logic crate.");
 
+    // Load the project constants
+    let project_constants: ProjectConstants =
+        load_json_structure("project-constants.json").expect("Could not load project constants");
+
     // Load the game settings
-    let mut settings = persistent::settings::PersistentGameSettings::load_or_create(force_recreate_savefiles)
+    let mut settings =
+        persistent::settings::PersistentGameSettings::load_or_create(force_recreate_savefiles)
             .expect("Failed to parse game settings from disk. Possibly corrupt file?");
 
     // Load the game save state
-    let mut save_state = persistent::save_state::GameSaveState::load_or_create(force_recreate_savefiles)
+    let mut save_state =
+        persistent::save_state::GameSaveState::load_or_create(force_recreate_savefiles)
             .expect("Failed to parse game save state from disk. Possibly corrupt file?");
 
     // Blocking call to the graphics rendering loop.
     rendering::event_loop::handle_graphics_blocking(
         |builder| {
-            builder.msaa_4x().vsync();
+            builder
+                .msaa_4x()
+                .vsync()
+                .title(project_constants.game_name.as_str())
+                .height(project_constants.base_window_size.1 as i32)
+                .width(project_constants.base_window_size.0 as i32);
         },
         settings.target_fps,
     );

game/game_logic/src/project_constants.rs

@@ -0,0 +1,17 @@
+use serde::Deserialize;
+
+/// This structure is filled with the contents of `dist/project-constants.json` at runtime
+#[derive(Debug, Deserialize)]
+pub struct ProjectConstants {
+    /// The name of the game
+    pub game_name: String,
+
+    /// The window size to use on launch
+    pub base_window_size: (u32, u32),
+
+    /// The Discord application ID
+    pub discord_app_id: u64,
+
+    /// The target framerate of the game
+    pub target_fps: u32,
+}