Added basic system file

Cargo.lock

@@ -543,6 +543,7 @@ dependencies = [
  "rand",
  "serde",
  "toml",
+ "walkdir",
  "wgpu",
  "winit",
 ]
@@ -1382,6 +1383,15 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "scoped-tls"
 version = "1.0.1"
@@ -1675,6 +1685,16 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "walkdir"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71d857dc86794ca4c280d616f7da00d2dbfd8cd788846559a6813e6aa4b54ee"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"

Cargo.toml

@@ -40,3 +40,4 @@ pollster = "0.3"
 anyhow = "1.0"
 cgmath = "0.18.0"
 rand = "0.8.5"
+walkdir = "2.4.0"

content/system.toml

@@ -0,0 +1,13 @@
+# content type: system
+[system]
+name = "12 Autumn above"
+
+[object.star]
+sprite = "star::a0"
+center = [0.0, 0.0]
+
+[object.earth]
+sprite = "planet::earth"
+center = "star"
+radius = 200
+angle = 14

src/content/content.rs

@@ -0,0 +1,32 @@
+use anyhow::Result;
+
+use super::{syntax, ContentType};
+
+#[derive(Debug)]
+pub struct Content {
+	systems: Vec<syntax::System>,
+}
+
+impl Content {
+	pub fn new(cv: Vec<ContentType>) -> Result<Self> {
+		let mut content = Self {
+			systems: Vec::new(),
+		};
+
+		// TODO: locate bad files
+
+		// These methods check intra-file consistency
+		for c in cv {
+			match c {
+				ContentType::System(v) => content.add_system(v)?,
+			};
+		}
+
+		return Ok(content);
+	}
+
+	fn add_system(&mut self, toml: syntax::system::toml::SystemRoot) -> Result<()> {
+		self.systems.push(syntax::System::parse(toml)?);
+		return Ok(());
+	}
+}

src/content/contenttype.rs

@@ -0,0 +1,30 @@
+use anyhow::Result;
+use std::{fs::File, io::Read, path::Path};
+
+use super::syntax;
+
+#[derive(Debug)]
+pub enum ContentType {
+	System(syntax::system::toml::SystemRoot),
+}
+
+// TODO: check content without loading game
+impl ContentType {
+	pub fn try_parse(file_string: &str) -> Result<Option<Self>> {
+		// TODO: More advanced parsing, read the whole top comment
+		let (first, _) = file_string.split_once("\n").unwrap();
+		let type_spec = first[1..].trim(); // Remove hash
+
+		return Ok(match type_spec {
+			"content type: system" => Some(Self::System(toml::from_str(&file_string)?)),
+			_ => None,
+		});
+	}
+
+	pub fn from_path(path: &Path) -> Result<Option<Self>> {
+		let mut file_string = String::new();
+		let _ = File::open(path)?.read_to_string(&mut file_string);
+		let file_string = file_string.trim();
+		return Self::try_parse(&file_string);
+	}
+}

src/content/mod.rs

@@ -0,0 +1,6 @@
+mod content;
+mod contenttype;
+mod syntax;
+
+pub use content::Content;
+pub use contenttype::ContentType;

src/content/syntax/mod.rs

@@ -0,0 +1,3 @@
+#![allow(dead_code)]
+pub mod system;
+pub use system::System;

src/content/syntax/system.rs

@@ -0,0 +1,95 @@
+use anyhow::{bail, Result};
+use cgmath::Point2;
+use std::collections::HashMap;
+
+use crate::physics::Pfloat;
+
+/// Toml file syntax
+pub(in crate::content) mod toml {
+	use super::Pfloat;
+	use serde::Deserialize;
+	use std::collections::HashMap;
+
+	#[derive(Debug, Deserialize)]
+	pub struct SystemRoot {
+		pub system: System,
+		pub object: HashMap<String, Object>,
+	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct System {
+		pub name: String,
+	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct Object {
+		pub sprite: String,
+		pub center: Center,
+
+		#[serde(default)]
+		pub radius: Pfloat,
+		#[serde(default)]
+		pub angle: Pfloat,
+	}
+
+	#[derive(Debug, Deserialize)]
+	#[serde(untagged)]
+	pub enum Center {
+		Label(String),
+		Coords([Pfloat; 2]),
+	}
+}
+
+#[derive(Debug)]
+pub struct System {
+	name: String,
+	objects: Vec<Object>,
+}
+
+#[derive(Debug)]
+struct Object {
+	sprite: String,
+	center: Point2<Pfloat>,
+	radius: Pfloat,
+	angle: Pfloat,
+}
+
+fn resolve_center(
+	objects: &HashMap<String, toml::Object>,
+	obj: &toml::Object,
+) -> Option<Point2<f32>> {
+	match &obj.center {
+		toml::Center::Label(s) => resolve_center(&objects, objects.get(s)?),
+		toml::Center::Coords(v) => Some(Point2::from(*v)),
+	}
+}
+
+impl System {
+	pub fn parse(value: toml::SystemRoot) -> Result<Self> {
+		let mut objects = Vec::new();
+
+		for (_, obj) in &value.object {
+			let center = match resolve_center(&value.object, obj) {
+				Some(v) => v,
+				None => {
+					bail!(
+						"Failed to parse content file: could not resolve center label `{:?}`",
+						obj.center
+					);
+				}
+			};
+
+			objects.push(Object {
+				sprite: obj.sprite.clone(),
+				center,
+				radius: obj.radius,
+				angle: obj.angle,
+			});
+		}
+
+		return Ok(Self {
+			name: value.system.name.clone(),
+			objects,
+		});
+	}
+}

src/doodad.rs

@@ -1,19 +1,19 @@
 use cgmath::{Deg, Point2};
 
-use crate::{physics::Pfloat, Sprite, Spriteable};
+use crate::{physics::Pfloat, render::SpriteTexture, Sprite, Spriteable};
 
 pub struct Doodad {
-	pub sprite: String,
+	pub sprite: SpriteTexture,
 	pub pos: Point2<Pfloat>,
 	pub parallax: Pfloat,
 	pub height: Pfloat,
 }
 
 impl Spriteable for Doodad {
-	fn sprite(&self) -> Sprite {
+	fn get_sprite(&self) -> Sprite {
 		return Sprite {
+			texture: self.sprite.clone(),
 			pos: self.pos,
-			name: self.sprite.clone(),
 			angle: Deg { 0: 0.0 },
 			scale: 1.0,
 			height: self.height,

src/main.rs

@@ -1,5 +1,15 @@
+mod content;
+mod doodad;
+mod inputstatus;
+mod physics;
+mod render;
+mod ship;
+mod system;
+
 use anyhow::Result;
 use cgmath::{Deg, Point2};
+use std::time::Instant;
+use walkdir::WalkDir;
 use winit::{
 	event::{
 		ElementState, Event, KeyboardInput, MouseButton, MouseScrollDelta, TouchPhase,
@@ -9,12 +19,14 @@ use winit::{
 	window::WindowBuilder,
 };
 
-mod doodad;
+use crate::{
-mod inputstatus;
+	doodad::Doodad,
-mod physics;
+	inputstatus::InputStatus,
-mod render;
+	physics::Pfloat,
-mod ship;
+	render::{GPUState, SpriteTexture},
-mod system;
+	ship::{Ship, ShipKind},
+	system::System,
+};
 
 pub const ZOOM_MIN: Pfloat = 200.0;
 pub const ZOOM_MAX: Pfloat = 2000.0;
@@ -34,15 +46,6 @@ pub const STARFIELD_DENSITY: f64 = 0.01;
 // Must fit inside an i32
 pub const STARFIELD_COUNT: u64 = (STARFIELD_SIZE as f64 * STARFIELD_DENSITY) as u64;
 
-use crate::{
-	doodad::Doodad,
-	inputstatus::InputStatus,
-	physics::Pfloat,
-	render::GPUState,
-	ship::{Ship, ShipKind},
-	system::System,
-};
-
 #[derive(Debug, Clone, Copy)]
 struct Camera {
 	/// Camera center
@@ -54,12 +57,12 @@ struct Camera {
 }
 
 trait Spriteable {
-	fn sprite(&self) -> Sprite;
+	fn get_sprite(&self) -> Sprite;
 }
 
 struct Sprite {
 	/// Name of the sprite to draw
-	name: String,
+	texture: SpriteTexture,
 
 	/// This object's position, in world coordinates.
 	pos: Point2<Pfloat>,
@@ -143,11 +146,11 @@ impl Game {
 		self.last_update = Instant::now();
 	}
 
-	fn sprites(&self) -> Vec<Sprite> {
+	fn get_sprites(&self) -> Vec<Sprite> {
 		let mut sprites: Vec<Sprite> = Vec::new();
 
-		sprites.append(&mut self.system.sprites());
+		sprites.append(&mut self.system.get_sprites());
-		sprites.push(self.player.sprite());
+		sprites.push(self.player.get_sprite());
 
 		// Make sure sprites are drawn in the correct order
 		// (note the reversed a, b in the comparator)
@@ -160,8 +163,6 @@ impl Game {
 	}
 }
 
-use std::time::Instant;
-
 pub async fn run() -> Result<()> {
 	let event_loop = EventLoop::new();
 	let window = WindowBuilder::new().build(&event_loop).unwrap();
@@ -230,6 +231,20 @@ pub async fn run() -> Result<()> {
 }
 
 fn main() -> Result<()> {
-	pollster::block_on(run())?;
+	let mut raw_content = Vec::new();
+	for e in WalkDir::new("content").into_iter().filter_map(|e| e.ok()) {
+		if e.metadata().unwrap().is_file() {
+			let c = crate::content::ContentType::from_path(e.path())?;
+			match c {
+				Some(c) => raw_content.push(c),
+				None => continue,
+			}
+		}
+	}
+
+	let a = crate::content::Content::new(raw_content)?;
+	println!("{:?}", a);
+
+	//pollster::block_on(run())?;
 	return Ok(());
 }

src/render/gpustate.rs

@@ -215,11 +215,11 @@ impl GPUState {
 		let clip_ne = Point2::from((-self.window_aspect, 1.0)) * game.camera.zoom;
 		let clip_sw = Point2::from((self.window_aspect, -1.0)) * game.camera.zoom;
 
-		for s in game.sprites() {
+		for s in game.get_sprites() {
 			// Parallax is computed here, so we can check if this sprite is visible.
 			let pos =
 				(s.pos - game.camera.pos.to_vec()) / (s.parallax + game.camera.zoom / ZOOM_MIN);
-			let texture = self.texture_array.get_texture(&s.name[..]);
+			let texture = self.texture_array.get_sprite_texture(s.texture);
 
 			// Game dimensions of this sprite post-scale.
 			// Don't divide by 2, we use this later.
@@ -376,7 +376,7 @@ impl GPUState {
 					self.window_size.height as f32,
 				],
 				window_aspect: [self.window_aspect, 0.0],
-				starfield_texture: [self.texture_array.get_starfield().index, 0],
+				starfield_texture: [self.texture_array.get_starfield_texture().index, 0],
 				starfield_tile_size: [STARFIELD_SIZE as f32, 0.0],
 			}]),
 		);

src/render/mod.rs

@@ -6,6 +6,12 @@ mod vertexbuffer;
 
 pub use gpustate::GPUState;
 
+/// A handle to a sprite texture
+#[derive(Debug, Clone, Copy)]
+pub struct SpriteTexture {
+	pub name: &'static str,
+}
+
 // API correction matrix.
 // cgmath uses OpenGL's matrix format, which
 // needs to be converted to wgpu's matrix format.

src/render/texturearray/array.rs

@@ -2,6 +2,8 @@ use anyhow::Result;
 use std::{collections::HashMap, num::NonZeroU32, path::PathBuf};
 use wgpu::BindGroupLayout;
 
+use crate::render::SpriteTexture;
+
 use super::{loader::TextureLoader, Texture, TextureArrayConfig};
 
 pub struct TextureArray {
@@ -14,11 +16,15 @@ pub struct TextureArray {
 impl TextureArray {
 	const INDEX_PATH: &'static str = "assets";
 
-	pub fn get_starfield(&self) -> Texture {
+	pub fn get_starfield_texture(&self) -> Texture {
 		return self.get_texture(&self.config.starfield);
 	}
 
-	pub fn get_texture(&self, name: &str) -> Texture {
+	pub fn get_sprite_texture(&self, sprite: SpriteTexture) -> Texture {
+		return self.get_texture(sprite.name);
+	}
+
+	fn get_texture(&self, name: &str) -> Texture {
 		match self.textures.get(name) {
 			Some(x) => *x,
 			None => self.get_texture(&self.config.error),

src/ship.rs

@@ -1,16 +1,18 @@
 use cgmath::Point2;
 
-use crate::{physics::Pfloat, physics::PhysBody, Sprite, Spriteable};
+use crate::{physics::Pfloat, physics::PhysBody, render::SpriteTexture, Sprite, Spriteable};
 
 pub enum ShipKind {
 	Gypsum,
 }
 
 impl ShipKind {
-	fn sprite(&self) -> &'static str {
+	fn sprite(&self) -> SpriteTexture {
-		match self {
+		let name = match self {
 			Self::Gypsum => "ship::gypsum",
-		}
+		};
+
+		return SpriteTexture { name };
 	}
 
 	fn height(&self) -> Pfloat {
@@ -35,10 +37,10 @@ impl Ship {
 }
 
 impl Spriteable for Ship {
-	fn sprite(&self) -> Sprite {
+	fn get_sprite(&self) -> Sprite {
 		return Sprite {
 			pos: self.body.pos,
-			name: self.kind.sprite().to_owned(),
+			texture: self.kind.sprite(),
 			angle: self.body.angle,
 			scale: 1.0,
 			parallax: 1.0,

src/system.rs

@@ -1,5 +1,6 @@
 use crate::{
 	physics::{Pfloat, Polar},
+	render::SpriteTexture,
 	Doodad, Sprite, Spriteable, STARFIELD_COUNT, STARFIELD_PARALLAX_MAX, STARFIELD_PARALLAX_MIN,
 	STARFIELD_SIZE,
 };
@@ -48,7 +49,7 @@ impl System {
 
 		s.bodies.push(Doodad {
 			pos: (0.0, 0.0).into(),
-			sprite: "star::star".to_owned(),
+			sprite: SpriteTexture { name: "star::star" },
 			parallax: 10.0,
 			height: 80.0,
 		});
@@ -60,7 +61,9 @@ impl System {
 				angle: Deg { 0: 31.0 },
 			}
 			.to_cartesian(),
-			sprite: "planet::earth".to_owned(),
+			sprite: SpriteTexture {
+				name: "planet::earth",
+			},
 			parallax: 5.0,
 			height: 120.0,
 		});
@@ -68,7 +71,7 @@ impl System {
 		return s;
 	}
 
-	pub fn sprites(&self) -> Vec<Sprite> {
+	pub fn get_sprites(&self) -> Vec<Sprite> {
-		return self.bodies.iter().map(|x| x.sprite()).collect();
+		return self.bodies.iter().map(|x| x.get_sprite()).collect();
 	}
 }