Fixed player controller

Cargo.lock

@@ -580,8 +580,12 @@ dependencies = [
  "anyhow",
  "cgmath",
  "crossbeam",
+ "galactica-constants",
  "galactica-content",
+ "galactica-gameobject",
  "galactica-render",
+ "galactica-shipbehavior",
+ "galactica-world",
  "image",
  "nalgebra",
  "pollster",
@@ -592,6 +596,10 @@ dependencies = [
  "winit",
 ]
 
+[[package]]
+name = "galactica-constants"
+version = "0.0.0"
+
 [[package]]
 name = "galactica-content"
 version = "0.0.0"
@@ -605,6 +613,19 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "galactica-gameobject"
+version = "0.0.0"
+dependencies = [
+ "cgmath",
+ "crossbeam",
+ "galactica-content",
+ "galactica-render",
+ "nalgebra",
+ "rand",
+ "rapier2d",
+]
+
 [[package]]
 name = "galactica-render"
 version = "0.0.0"
@@ -612,6 +633,7 @@ dependencies = [
  "anyhow",
  "bytemuck",
  "cgmath",
+ "galactica-constants",
  "galactica-content",
  "image",
  "rand",
@@ -619,6 +641,29 @@ dependencies = [
  "winit",
 ]
 
+[[package]]
+name = "galactica-shipbehavior"
+version = "0.0.0"
+dependencies = [
+ "cgmath",
+ "galactica-content",
+ "galactica-world",
+]
+
+[[package]]
+name = "galactica-world"
+version = "0.0.0"
+dependencies = [
+ "cgmath",
+ "crossbeam",
+ "galactica-content",
+ "galactica-gameobject",
+ "galactica-render",
+ "nalgebra",
+ "rand",
+ "rapier2d",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.11"

Cargo.toml

@@ -28,13 +28,24 @@ rpath = false
 
 
 [workspace]
-members = ["crates/content", "crates/render"]
+members = [
+	"crates/content",
+	"crates/render",
+	"crates/constants",
+	"crates/world",
+	"crates/shipbehavior",
+	"crates/gameobject",
+]
 
 
 [dependencies]
 # Internal crates
 galactica-content = { path = "crates/content" }
 galactica-render = { path = "crates/render" }
+galactica-constants = { path = "crates/constants" }
+galactica-world = { path = "crates/world" }
+galactica-shipbehavior = { path = "crates/shipbehavior" }
+galactica-gameobject = { path = "crates/gameobject" }
 
 # Files
 image = { version = "0.24", features = ["png"] }

content/guns.toml

@@ -2,10 +2,6 @@
 
 space.weapon = 10
 
-# Angle of fire cone
-# Smaller angle = more accurate
-spread = 2
-
 # Average delay between shots
 rate = 0.2
 # Random rate variation (+- this in both directions)
@@ -23,3 +19,8 @@ projectile.speed_rng = 10.0
 projectile.lifetime = 2.0
 projectile.lifetime_rng = 0.2
 projectile.damage = 10.0
+# Random variation of firing angle.
+# If this is 0, the projectile always goes straight.
+# If this is 10, projectiles will form a cone of 10 degrees
+# ( 5 degrees on each side )
+projectile.angle_rng = 2

crates/constants/Cargo.toml

@@ -0,0 +1,4 @@
+[package]
+name = "galactica-constants"
+version = "0.0.0"
+edition = "2021"

crates/constants/src/lib.rs

@@ -1,14 +1,24 @@
+#![warn(missing_docs)]
+
+//! Compile-time parameters
+
+/// Minimum zoom level
 pub const ZOOM_MIN: f32 = 200.0;
+/// Maximum zoom level
 pub const ZOOM_MAX: f32 = 2000.0;
 
 /// Z-axis range for starfield stars
 /// This does not affect scale.
 pub const STARFIELD_Z_MIN: f32 = 100.0;
+/// Z-axis range for starfield stars
+/// This does not affect scale.
 pub const STARFIELD_Z_MAX: f32 = 200.0;
 
 /// Size range for starfield stars, in game units.
 /// This is scaled for zoom, but NOT for distance.
 pub const STARFIELD_SIZE_MIN: f32 = 0.2;
+/// Size range for starfield stars, in game units.
+/// This is scaled for zoom, but NOT for distance.
 pub const STARFIELD_SIZE_MAX: f32 = 1.8;
 
 /// Size of a square starfield tile, in game units.
@@ -24,3 +34,18 @@ pub const STARFIELD_DENSITY: f64 = 0.01;
 /// Number of stars in one starfield tile
 /// Must fit inside an i32
 pub const STARFIELD_COUNT: u64 = (STARFIELD_SIZE as f64 * STARFIELD_DENSITY) as u64;
+
+/// Name of starfield texture
+pub const STARFIELD_TEXTURE_NAME: &'static str = "starfield";
+
+/// Root directory of game content
+pub const CONTENT_ROOT: &'static str = "./content";
+
+/// Root directory of game textures
+pub const TEXTURE_ROOT: &'static str = "./assets/render";
+
+/// We can draw at most this many sprites on the screen.
+pub const SPRITE_INSTANCE_LIMIT: u64 = 500;
+
+/// Must be small enough to fit in an i32
+pub const STARFIELD_INSTANCE_LIMIT: u64 = STARFIELD_COUNT * 24;

crates/content/src/handle.rs

@@ -1,6 +1,13 @@
+//! This module defines lightweight handles for every content type.
+//! This isn't strictly necessary (we could refer to them using their string keys),
+//! but this approach doesn't require frequent string cloning, and
+//! gives each content type a distinct Rust type.
+//!
+//! We could also use raw references to content types, but that creates a mess of lifetimes
+//! in our code. It's managable, but the approach here is simpler and easier to understand.
 use std::{cmp::Eq, hash::Hash};
 
-/// Represents a specific texture defined in the content dir.
+/// A lightweight representation of a
 #[derive(Debug, Clone, Copy)]
 pub struct TextureHandle {
 	/// The index of this texture in content.textures
@@ -23,16 +30,38 @@ impl PartialEq for TextureHandle {
 	}
 }
 
-/// A lightweight representation of a faction
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct FactionHandle {
-	/// The index of this faction in content.factions
-	/// TODO: pub in crate, currently for debug.
+/// A lightweight representation of an outfit
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct OutfitHandle {
+	/// TODO
 	pub index: usize,
 }
 
-impl Hash for FactionHandle {
-	fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-		self.index.hash(state)
-	}
+/// A lightweight representation of a gun
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct GunHandle {
+	/// TODO
+	pub index: usize,
+}
+
+/// A lightweight representation of a ship
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ShipHandle {
+	/// TODO
+	pub index: usize,
+}
+
+/// A lightweight representation of a star system
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct SystemHandle {
+	/// TODO
+	pub index: usize,
+}
+
+/// A lightweight representation of a faction
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct FactionHandle {
+	/// The index of this faction in content.factions
+	/// TODO: pub in crate, currently for debug (same with all other handles)
+	pub index: usize,
 }

crates/content/src/lib.rs

@@ -17,15 +17,16 @@ use std::{
 use toml;
 use walkdir::WalkDir;
 
-pub use handle::{FactionHandle, TextureHandle};
+pub use handle::{FactionHandle, GunHandle, OutfitHandle, ShipHandle, SystemHandle, TextureHandle};
 pub use part::{
-	EnginePoint, Faction, Gun, GunPoint, Outfit, OutfitSpace, Relationship, Ship, System, Texture,
+	EnginePoint, Faction, Gun, GunPoint, Outfit, OutfitSpace, Projectile, Relationship, Ship,
+	System, Texture,
 };
 
 mod syntax {
-	use anyhow::{bail, Result};
+	use anyhow::{bail, Context, Result};
 	use serde::Deserialize;
-	use std::collections::HashMap;
+	use std::{collections::HashMap, fmt::Display, hash::Hash};
 
 	use crate::part::{faction, gun, outfit, ship, system, texture};
 
@@ -39,6 +40,31 @@ mod syntax {
 		pub faction: Option<HashMap<String, faction::syntax::Faction>>,
 	}
 
+	fn merge_hashmap<K, V>(
+		to: &mut Option<HashMap<K, V>>,
+		mut from: Option<HashMap<K, V>>,
+	) -> Result<()>
+	where
+		K: Hash + Eq + Display,
+	{
+		if to.is_none() {
+			*to = from.take();
+			return Ok(());
+		}
+
+		if let Some(from_inner) = from {
+			let to_inner = to.as_mut().unwrap();
+			for (k, v) in from_inner {
+				if to_inner.contains_key(&k) {
+					bail!("Found duplicate key `{k}`");
+				} else {
+					to_inner.insert(k, v);
+				}
+			}
+		}
+		return Ok(());
+	}
+
 	impl Root {
 		pub fn new() -> Self {
 			Self {
@@ -52,98 +78,16 @@ mod syntax {
 		}
 
 		pub fn merge(&mut self, other: Root) -> Result<()> {
-			// Insert if not exists
-			// TODO: replace with a macro and try_insert once that is stable
-			if let Some(a) = other.gun {
-				if self.gun.is_none() {
-					self.gun = Some(a);
-				} else {
-					let sg = self.gun.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated gun name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
-			if let Some(a) = other.ship {
-				if self.ship.is_none() {
-					self.ship = Some(a);
-				} else {
-					let sg = self.ship.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated ship name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
-			if let Some(a) = other.system {
-				if self.system.is_none() {
-					self.system = Some(a);
-				} else {
-					let sg = self.system.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated system name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
-			if let Some(a) = other.outfit {
-				if self.outfit.is_none() {
-					self.outfit = Some(a);
-				} else {
-					let sg = self.outfit.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated engine name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
-			if let Some(a) = other.texture {
-				if self.texture.is_none() {
-					self.texture = Some(a);
-				} else {
-					let sg = self.texture.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated texture name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
-			if let Some(a) = other.faction {
-				if self.faction.is_none() {
-					self.faction = Some(a);
-				} else {
-					let sg = self.faction.as_mut().unwrap();
-					for (k, v) in a {
-						if sg.contains_key(&k) {
-							bail!("Repeated faction name {k}");
-						} else {
-							sg.insert(k, v);
-						}
-					}
-				}
-			}
-
+			merge_hashmap(&mut self.gun, other.gun).with_context(|| "while merging guns")?;
+			merge_hashmap(&mut self.ship, other.ship).with_context(|| "while merging ships")?;
+			merge_hashmap(&mut self.system, other.system)
+				.with_context(|| "while merging systems")?;
+			merge_hashmap(&mut self.outfit, other.outfit)
+				.with_context(|| "while merging outfits")?;
+			merge_hashmap(&mut self.texture, other.texture)
+				.with_context(|| "while merging textures")?;
+			merge_hashmap(&mut self.faction, other.faction)
+				.with_context(|| "while merging factions")?;
 			return Ok(());
 		}
 	}
@@ -161,38 +105,37 @@ trait Build {
 /// Represents static game content
 #[derive(Debug)]
 pub struct Content {
-	/// Star systems
-	pub systems: Vec<part::system::System>,
-
-	/// Ship bodies
-	pub ships: Vec<part::ship::Ship>,
-
-	/// Ship guns
-	pub guns: Vec<part::gun::Gun>,
-
-	/// Outfits
-	pub outfits: Vec<part::outfit::Outfit>,
+	/* Configuration values */
+	/// Root directory for textures
+	texture_root: PathBuf,
+	/// Name of starfield texture
+	starfield_texture_name: String,
 
 	/// Textures
 	pub textures: Vec<part::texture::Texture>,
-
-	/// Factions
-	pub factions: Vec<part::faction::Faction>,
-
-	/// Map strings to texture handles
-	/// This is never used outside this crate.
+	/// Map strings to texture names.
+	/// This is only necessary because we need to hard-code a few texture names for UI elements.
 	texture_index: HashMap<String, handle::TextureHandle>,
-
 	/// The texture to use for starfield stars
 	starfield_handle: Option<handle::TextureHandle>,
 
-	/// Root directory for textures
-	texture_root: PathBuf,
+	/// Outfits
+	outfits: Vec<part::outfit::Outfit>,
 
-	/// Name of starfield texture
-	starfield_texture_name: String,
+	/// Ship guns
+	guns: Vec<part::gun::Gun>,
+
+	/// Ship bodies
+	ships: Vec<part::ship::Ship>,
+
+	/// Star systems
+	systems: Vec<part::system::System>,
+
+	/// Factions
+	factions: Vec<part::faction::Faction>,
 }
 
+// Loading methods
 impl Content {
 	fn try_parse(path: &Path) -> Result<syntax::Root> {
 		let mut file_string = String::new();
@@ -201,32 +144,6 @@ impl Content {
 		return Ok(toml::from_str(&file_string)?);
 	}
 
-	/// Get the texture handle for the starfield texture
-	pub fn get_starfield_handle(&self) -> TextureHandle {
-		match self.starfield_handle {
-			Some(h) => h,
-			None => unreachable!("Starfield texture hasn't been loaded yet!"),
-		}
-	}
-
-	/// Get a texture from a handle
-	pub fn get_texture_handle(&self, name: &str) -> TextureHandle {
-		return *self.texture_index.get(name).unwrap();
-		// TODO: handle errors
-	}
-
-	/// Get a texture from a handle
-	pub fn get_texture(&self, h: TextureHandle) -> &Texture {
-		// In theory, this could fail if h has a bad index, but that shouldn't ever happen.
-		// The only TextureHandles that exist should be created by this crate.
-		return &self.textures[h.index];
-	}
-
-	/// Get a faction from a handle
-	pub fn get_faction(&self, h: FactionHandle) -> &Faction {
-		return &self.factions[h.index];
-	}
-
 	/// Load content from a directory.
 	pub fn load_dir(
 		path: PathBuf,
@@ -296,3 +213,54 @@ impl Content {
 		return Ok(content);
 	}
 }
+
+// Access methods
+impl Content {
+	/// Get the texture handle for the starfield texture
+	pub fn get_starfield_handle(&self) -> TextureHandle {
+		match self.starfield_handle {
+			Some(h) => h,
+			None => unreachable!("Starfield texture hasn't been loaded yet!"),
+		}
+	}
+
+	/// Get a handle from a texture name
+	pub fn get_texture_handle(&self, name: &str) -> TextureHandle {
+		return match self.texture_index.get(name) {
+			Some(s) => *s,
+			None => unreachable!("get_texture_handle was called with a bad handle!"),
+		};
+	}
+
+	/// Get a texture from a handle
+	pub fn get_texture(&self, h: TextureHandle) -> &Texture {
+		// In theory, this could fail if h has a bad index, but that shouldn't ever happen.
+		// The only TextureHandles that exist should be created by this crate.
+		return &self.textures[h.index];
+	}
+
+	/// Get an outfit from a handle
+	pub fn get_outfit(&self, h: OutfitHandle) -> &Outfit {
+		return &self.outfits[h.index];
+	}
+
+	/// Get a gun from a handle
+	pub fn get_gun(&self, h: GunHandle) -> &Gun {
+		return &self.guns[h.index];
+	}
+
+	/// Get a texture from a handle
+	pub fn get_ship(&self, h: ShipHandle) -> &Ship {
+		return &self.ships[h.index];
+	}
+
+	/// Get a system from a handle
+	pub fn get_system(&self, h: SystemHandle) -> &System {
+		return &self.systems[h.index];
+	}
+
+	/// Get a faction from a handle
+	pub fn get_faction(&self, h: FactionHandle) -> &Faction {
+		return &self.factions[h.index];
+	}
+}

crates/content/src/part/gun.rs

@@ -16,7 +16,6 @@ pub(crate) mod syntax {
 	#[derive(Debug, Deserialize)]
 	pub struct Gun {
 		pub projectile: Projectile,
-		pub spread: f32,
 		pub rate: f32,
 		pub rate_rng: f32,
 		pub space: shared::syntax::OutfitSpace,
@@ -32,6 +31,7 @@ pub(crate) mod syntax {
 		pub lifetime: f32,
 		pub lifetime_rng: f32,
 		pub damage: f32,
+		pub angle_rng: f32,
 	}
 }
 
@@ -44,13 +44,6 @@ pub struct Gun {
 	/// The projectile this gun produces
 	pub projectile: Projectile,
 
-	/// The accuracy of this gun.
-	/// Projectiles can be off center up to
-	/// `spread / 2` degrees in both directions.
-	///
-	/// (Forming a "fire cone" of `spread` degrees)
-	pub spread: Deg<f32>,
-
 	/// Average delay between projectiles, in seconds.
 	pub rate: f32,
 
@@ -87,6 +80,13 @@ pub struct Projectile {
 
 	/// The damage this projectile does
 	pub damage: f32,
+
+	/// The angle variation of this projectile.
+	/// Projectiles can be off center up to
+	/// `spread / 2` degrees in both directions.
+	///
+	/// (Forming a "fire cone" of `spread` degrees)
+	pub angle_rng: Deg<f32>,
 }
 
 impl crate::Build for Gun {
@@ -106,7 +106,6 @@ impl crate::Build for Gun {
 			ct.guns.push(Self {
 				name: gun_name,
 				space: gun.space.into(),
-				spread: Deg(gun.spread),
 				rate: gun.rate,
 				rate_rng: gun.rate_rng,
 				projectile: Projectile {
@@ -118,6 +117,7 @@ impl crate::Build for Gun {
 					lifetime: gun.projectile.lifetime,
 					lifetime_rng: gun.projectile.lifetime_rng,
 					damage: gun.projectile.damage,
+					angle_rng: Deg(gun.projectile.angle_rng),
 				},
 			});
 		}

crates/content/src/part/shared.rs

@@ -35,7 +35,7 @@ impl OutfitSpace {
 	}
 
 	/// Does this outfit contain `smaller`?
-	pub fn can_contain(&self, smaller: Self) -> bool {
+	pub fn can_contain(&self, smaller: &Self) -> bool {
 		self.outfit >= (smaller.outfit + smaller.weapon + smaller.engine)
 			&& self.weapon >= smaller.weapon
 			&& self.engine >= smaller.engine

crates/gameobject/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "galactica-gameobject"
+version = "0.0.0"
+edition = "2021"
+
+[dependencies]
+galactica-render = { path = "../render" }
+galactica-content = { path = "../content" }
+
+rapier2d = { version = "0.17.2" }
+nalgebra = "0.32.3"
+crossbeam = "0.8.3"
+cgmath = "0.18.0"
+rand = "0.8.5"

crates/gameobject/src/lib.rs

@@ -0,0 +1,17 @@
+//! This module handles all game data: ship damage, outfit stats, etc.
+//!
+//! The code here handles game *data* exclusively: it keeps track of the status
+//! of every ship in the game, but it has no understanding of physics.
+//! That is done in `galactica_world`.
+
+mod outfits;
+mod projectile;
+mod ship;
+mod system;
+mod systemobject;
+
+pub use outfits::{OutfitSet, OutfitStatSum, ShipGun};
+pub use projectile::Projectile;
+pub use ship::Ship;
+pub use system::System;
+pub use systemobject::SystemObject;

crates/gameobject/src/outfits.rs

@@ -1,20 +1,25 @@
 use cgmath::{Deg, Point3};
+use galactica_content as content;
 use galactica_render::ObjectSubSprite;
 
-use crate::content;
-
 /// Represents a gun attached to a specific ship at a certain gunpoint.
 #[derive(Debug)]
 pub struct ShipGun {
+	/// The kind of gun this is
 	pub kind: content::Gun,
+
+	/// How many seconds we must wait before this gun can fire
 	pub cooldown: f32,
+
+	/// Index of the gunpoint this gun is attached to
 	pub point: usize,
 }
 
 impl ShipGun {
-	pub fn new(kind: content::Gun, point: usize) -> Self {
+	/// Make a new shipgun
+	pub fn new(kind: &content::Gun, point: usize) -> Self {
 		Self {
-			kind: kind,
+			kind: kind.clone(),
 			point,
 			cooldown: 0.0,
 		}
@@ -62,15 +67,17 @@ impl OutfitStatSum {
 	}
 }
 
-/// Represents all the outfits attached to a ship.
+/// Represents a set of outfits attached to a ship.
 /// Keeps track of the sum of their stats, so it mustn't be re-computed every frame.
 #[derive(Debug)]
-pub struct ShipOutfits {
+pub struct OutfitSet {
+	/// The total sum of the stats this set of outfits provides
+	/// TODO: this shouldn't be pub
 	pub stats: OutfitStatSum,
-	pub total_space: content::OutfitSpace,
 
+	//pub total_space: content::OutfitSpace,
 	available_space: content::OutfitSpace,
-	outfits: Vec<content::Outfit>,
+	outfits: Vec<content::OutfitHandle>,
 	guns: Vec<ShipGun>,
 	enginepoints: Vec<content::EnginePoint>,
 	gunpoints: Vec<content::GunPoint>,
@@ -80,14 +87,15 @@ pub struct ShipOutfits {
 	engine_flare_sprites: Vec<ObjectSubSprite>,
 }
 
-impl<'a> ShipOutfits {
+impl<'a> OutfitSet {
+	/// Make a new outfit array
 	pub fn new(content: &content::Ship) -> Self {
 		Self {
 			stats: OutfitStatSum::new(),
 			outfits: Vec::new(),
 			guns: Vec::new(),
 			available_space: content.space.clone(),
-			total_space: content.space.clone(),
+			//total_space: content.space.clone(),
 			enginepoints: content.engines.clone(),
 			gunpoints: content.guns.clone(),
 			engine_flare_sprites: vec![],
@@ -95,8 +103,8 @@ impl<'a> ShipOutfits {
 	}
 
 	/// Does this outfit set contain the specified outfit?
-	pub fn contains_outfit(&self, o: &content::Outfit) -> bool {
-		match self.outfits.iter().position(|x| x.name == o.name) {
+	pub fn contains_outfit(&self, o: content::OutfitHandle) -> bool {
+		match self.outfits.iter().position(|x| *x == o) {
 			Some(_) => true,
 			None => false,
 		}
@@ -105,33 +113,35 @@ impl<'a> ShipOutfits {
 	/// Add an outfit to this ship.
 	/// Returns true on success, and false on failure
 	/// TODO: failure reason enum
-	pub fn add(&mut self, o: content::Outfit) -> bool {
-		if !self.available_space.can_contain(o.space) {
+	pub fn add(&mut self, ct: &content::Content, o: content::OutfitHandle) -> bool {
+		let outfit = ct.get_outfit(o);
+		if !self.available_space.can_contain(&outfit.space) {
 			return false;
 		}
-		self.available_space.occupy(&o.space);
-		self.stats.add(&o);
+		self.available_space.occupy(&outfit.space);
+		self.stats.add(&outfit);
 		self.outfits.push(o);
 		self.update_engine_flares();
 		return true;
 	}
 
-	/// TODO: is outfit in set?
-	pub fn remove(&mut self, o: content::Outfit) {
-		let i = match self.outfits.iter().position(|x| x.name == o.name) {
+	/// Remove an outfit from this set
+	pub fn remove(&mut self, ct: &content::Content, o: content::OutfitHandle) {
+		let outfit = ct.get_outfit(o);
+		let i = match self.outfits.iter().position(|x| *x == o) {
 			Some(i) => i,
-			None => panic!("Removed non-existing outfit"),
+			None => panic!("removed non-existing outfit"),
 		};
-		self.available_space.free(&o.space);
+		self.available_space.free(&outfit.space);
 		self.outfits.remove(i);
-		self.stats.remove(&o);
+		self.stats.remove(&outfit);
 		self.update_engine_flares();
 	}
 
 	/// Add a gun to this outfit set.
 	/// This automatically attaches the gun to the first available gunpoint,
 	/// and returns false (applying no changes) if no points are available.
-	pub fn add_gun(&mut self, gun: content::Gun) -> bool {
+	pub fn add_gun(&mut self, ct: &content::Content, g: content::GunHandle) -> bool {
 		// Find first unused point
 		let mut p = None;
 		'outer: for i in 0..self.gunpoints.len() {
@@ -143,6 +153,7 @@ impl<'a> ShipOutfits {
 			p = Some(i);
 			break;
 		}
+		let gun = ct.get_gun(g);
 
 		// All points are taken
 		if p.is_none() {
@@ -154,10 +165,12 @@ impl<'a> ShipOutfits {
 		return true;
 	}
 
+	/// Iterate over all guns in this outfitset
 	pub fn iter_guns(&mut self) -> impl Iterator<Item = &mut ShipGun> {
 		self.guns.iter_mut()
 	}
 
+	/// Iterate over all guns and the gunpoints they're attached to
 	pub fn iter_guns_points(&mut self) -> impl Iterator<Item = (&mut ShipGun, &content::GunPoint)> {
 		self.guns
 			.iter_mut()
@@ -165,6 +178,7 @@ impl<'a> ShipOutfits {
 			.map(|(a, b)| (b, a))
 	}
 
+	/// Update engine flare sprites
 	pub fn update_engine_flares(&mut self) {
 		// TODO: better way to pick flare texture
 		self.engine_flare_sprites.clear();
@@ -190,6 +204,7 @@ impl<'a> ShipOutfits {
 			.collect();
 	}
 
+	/// Get the sprites we should show if this ship is firing its engines
 	pub fn get_engine_flares(&self) -> Vec<ObjectSubSprite> {
 		return self.engine_flare_sprites.clone();
 	}

crates/gameobject/src/projectile.rs

@@ -0,0 +1,18 @@
+use galactica_content as content;
+
+#[derive(Debug)]
+pub struct Projectile {
+	pub content: content::Projectile,
+	pub lifetime: f32,
+	pub faction: content::FactionHandle,
+}
+
+impl Projectile {
+	pub fn tick(&mut self, t: f32) {
+		self.lifetime -= t;
+	}
+
+	pub fn is_expired(&self) -> bool {
+		return self.lifetime < 0.0;
+	}
+}

crates/gameobject/src/ship.rs

@@ -0,0 +1,68 @@
+use rand::Rng;
+
+use crate::{OutfitSet, Projectile};
+use galactica_content as content;
+
+#[derive(Debug)]
+pub struct Ship {
+	pub handle: content::ShipHandle,
+	pub faction: content::FactionHandle,
+	pub outfits: OutfitSet,
+
+	// TODO: unified ship stats struct, like space
+	// TODO: unified outfit stats struct: check
+	pub hull: f32,
+}
+
+impl Ship {
+	pub fn new(
+		ct: &content::Content,
+		handle: content::ShipHandle,
+		faction: content::FactionHandle,
+		outfits: OutfitSet,
+	) -> Self {
+		let s = ct.get_ship(handle);
+		Ship {
+			handle: handle,
+			faction,
+			outfits,
+			hull: s.hull,
+		}
+	}
+
+	pub fn handle_projectile_collision(&mut self, ct: &content::Content, p: &Projectile) -> bool {
+		let f = ct.get_faction(self.faction);
+		let r = f.relationships.get(&p.faction).unwrap();
+		match r {
+			content::Relationship::Hostile => {
+				// TODO: implement death and spawning, and enable damage
+				//s.hull -= p.damage;
+				return true;
+			}
+			_ => return false,
+		}
+	}
+
+	pub fn fire_guns(&mut self) -> Vec<(Projectile, content::GunPoint)> {
+		self.outfits
+			.iter_guns_points()
+			.filter(|(g, _)| g.cooldown <= 0.0)
+			.map(|(g, p)| {
+				let mut rng = rand::thread_rng();
+				g.cooldown = g.kind.rate + &rng.gen_range(-g.kind.rate_rng..=g.kind.rate_rng);
+
+				(
+					Projectile {
+						content: g.kind.projectile.clone(),
+						lifetime: g.kind.projectile.lifetime
+							+ rng.gen_range(
+								-g.kind.projectile.lifetime_rng..=g.kind.projectile.lifetime_rng,
+							),
+						faction: self.faction,
+					},
+					p.clone(),
+				)
+			})
+			.collect()
+	}
+}

crates/gameobject/src/system.rs

@@ -1,21 +1,21 @@
+use crate::SystemObject;
+use galactica_content as content;
 use galactica_render::ObjectSprite;
 
-use super::SystemObject;
-use crate::content;
-
 pub struct System {
 	pub name: String,
 	bodies: Vec<SystemObject>,
 }
 
 impl System {
-	pub fn new(ct: &content::System) -> Self {
+	pub fn new(ct: &content::Content, handle: content::SystemHandle) -> Self {
+		let sys = ct.get_system(handle);
 		let mut s = System {
-			name: ct.name.clone(),
+			name: sys.name.clone(),
 			bodies: Vec::new(),
 		};
 
-		for o in &ct.objects {
+		for o in &sys.objects {
 			s.bodies.push(SystemObject {
 				pos: o.position,
 				sprite_texture: o.sprite_texture,

crates/gameobject/src/systemobject.rs

@@ -1,5 +1,6 @@
-use crate::content;
 use cgmath::{Deg, Point3};
+
+use galactica_content as content;
 use galactica_render::ObjectSprite;
 
 pub struct SystemObject {

crates/render/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 # Internal crates
 galactica-content = { path = "../content" }
+galactica-constants = { path = "../constants" }
 
 # Misc helpers
 anyhow = "1.0"

crates/render/src/consts.rs

@@ -1,21 +0,0 @@
-use crate::consts_main;
-use cgmath::Matrix4;
-
-// We can draw at most this many sprites on the screen.
-// TODO: compile-time option or config file
-pub const SPRITE_INSTANCE_LIMIT: u64 = 500;
-
-// Must be small enough to fit in an i32
-pub const STARFIELD_INSTANCE_LIMIT: u64 = consts_main::STARFIELD_COUNT * 24;
-
-/// Shader entry points
-pub const SHADER_MAIN_VERTEX: &'static str = "vertex_main";
-pub const SHADER_MAIN_FRAGMENT: &'static str = "fragment_main";
-
-#[rustfmt::skip]
-pub const OPENGL_TO_WGPU_MATRIX: Matrix4<f32> = Matrix4::new(
-	1.0, 0.0, 0.0, 0.0,
-	0.0, 1.0, 0.0, 0.0,
-	0.0, 0.0, 0.5, 0.5,
-	0.0, 0.0, 0.0, 1.0,
-);

crates/render/src/gpustate.rs

@@ -1,13 +1,13 @@
 use anyhow::Result;
 use bytemuck;
 use cgmath::{Deg, EuclideanSpace, Matrix4, Point2, Vector3};
+use galactica_constants;
 use std::{iter, rc::Rc};
 use wgpu;
 use winit::{self, dpi::LogicalSize, window::Window};
 
 use crate::{
-	consts::{OPENGL_TO_WGPU_MATRIX, SPRITE_INSTANCE_LIMIT, STARFIELD_INSTANCE_LIMIT},
-	consts_main, content,
+	content,
 	globaldata::{GlobalData, GlobalDataContent},
 	pipeline::PipelineBuilder,
 	sprite::ObjectSubSprite,
@@ -18,7 +18,7 @@ use crate::{
 		types::{SpriteInstance, StarfieldInstance, TexturedVertex},
 		VertexBuffer,
 	},
-	ObjectSprite, UiSprite,
+	ObjectSprite, UiSprite, OPENGL_TO_WGPU_MATRIX,
 };
 
 /// A high-level GPU wrapper. Consumes game state,
@@ -122,7 +122,7 @@ impl GPUState {
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
-				SPRITE_INSTANCE_LIMIT,
+				galactica_constants::SPRITE_INSTANCE_LIMIT,
 			)),
 
 			starfield: Rc::new(VertexBuffer::new::<TexturedVertex, StarfieldInstance>(
@@ -130,7 +130,7 @@ impl GPUState {
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
-				STARFIELD_INSTANCE_LIMIT,
+				galactica_constants::STARFIELD_INSTANCE_LIMIT,
 			)),
 		};
 
@@ -409,7 +409,7 @@ impl GPUState {
 		}
 
 		// Enforce sprite limit
-		if instances.len() as u64 > SPRITE_INSTANCE_LIMIT {
+		if instances.len() as u64 > galactica_constants::SPRITE_INSTANCE_LIMIT {
 			// TODO: no panic, handle this better.
 			panic!("Sprite limit exceeded!")
 		}
@@ -476,17 +476,17 @@ impl GPUState {
 			bytemuck::cast_slice(&[GlobalDataContent {
 				camera_position: camera_pos.into(),
 				camera_zoom: [camera_zoom, 0.0],
-				camera_zoom_limits: [consts_main::ZOOM_MIN, consts_main::ZOOM_MAX],
+				camera_zoom_limits: [galactica_constants::ZOOM_MIN, galactica_constants::ZOOM_MAX],
 				window_size: [
 					self.window_size.width as f32,
 					self.window_size.height as f32,
 				],
 				window_aspect: [self.window_aspect, 0.0],
 				starfield_texture: [self.texture_array.get_starfield_texture().index, 0],
-				starfield_tile_size: [consts_main::STARFIELD_SIZE as f32, 0.0],
+				starfield_tile_size: [galactica_constants::STARFIELD_SIZE as f32, 0.0],
 				starfield_size_limits: [
-					consts_main::STARFIELD_SIZE_MIN,
-					consts_main::STARFIELD_SIZE_MAX,
+					galactica_constants::STARFIELD_SIZE_MIN,
+					galactica_constants::STARFIELD_SIZE_MAX,
 				],
 			}]),
 		);

crates/render/src/lib.rs

@@ -7,7 +7,6 @@
 //! and the only one external code should interact with.
 //! (Excluding data structs, like [`ObjectSprite`])
 
-mod consts;
 mod globaldata;
 mod gpustate;
 mod pipeline;
@@ -16,9 +15,20 @@ mod starfield;
 mod texturearray;
 mod vertexbuffer;
 
-// TODO: remove
-mod consts_main;
-
 use galactica_content as content;
 pub use gpustate::GPUState;
 pub use sprite::{AnchoredUiPosition, ObjectSprite, ObjectSubSprite, UiSprite};
+
+use cgmath::Matrix4;
+
+/// Shader entry points
+pub(crate) const SHADER_MAIN_VERTEX: &'static str = "vertex_main";
+pub(crate) const SHADER_MAIN_FRAGMENT: &'static str = "fragment_main";
+
+#[rustfmt::skip]
+pub(crate) const OPENGL_TO_WGPU_MATRIX: Matrix4<f32> = Matrix4::new(
+	1.0, 0.0, 0.0, 0.0,
+	0.0, 1.0, 0.0, 0.0,
+	0.0, 0.0, 0.5, 0.5,
+	0.0, 0.0, 0.0, 1.0,
+);

crates/render/src/pipeline.rs

@@ -1,8 +1,8 @@
 use std::rc::Rc;
 use wgpu;
 
-use crate::consts::{SHADER_MAIN_FRAGMENT, SHADER_MAIN_VERTEX};
 use crate::vertexbuffer::VertexBuffer;
+use crate::{SHADER_MAIN_FRAGMENT, SHADER_MAIN_VERTEX};
 
 pub struct PipelineBuilder<'a> {
 	// These are provided with new()

crates/render/src/starfield.rs

@@ -1,7 +1,8 @@
 use cgmath::{Point2, Point3, Vector2, Vector3};
+use galactica_constants;
 use rand::{self, Rng};
 
-use crate::{consts, consts_main, vertexbuffer::types::StarfieldInstance};
+use crate::vertexbuffer::types::StarfieldInstance;
 
 pub(crate) struct StarfieldStar {
 	/// Star coordinates, in world space.
@@ -33,16 +34,20 @@ impl Starfield {
 	pub fn regenerate(&mut self) {
 		// TODO: save seed in system, regenerate on jump
 		let mut rng = rand::thread_rng();
-		let sz = consts_main::STARFIELD_SIZE as f32 / 2.0;
-		self.stars = (0..consts_main::STARFIELD_COUNT)
+		let sz = galactica_constants::STARFIELD_SIZE as f32 / 2.0;
+		self.stars = (0..galactica_constants::STARFIELD_COUNT)
 			.map(|_| StarfieldStar {
 				pos: Point3 {
 					x: rng.gen_range(-sz..=sz),
 					y: rng.gen_range(-sz..=sz),
-					z: rng.gen_range(consts_main::STARFIELD_Z_MIN..consts_main::STARFIELD_Z_MAX),
+					z: rng.gen_range(
+						galactica_constants::STARFIELD_Z_MIN..galactica_constants::STARFIELD_Z_MAX,
+					),
 				},
-				size: rng
-					.gen_range(consts_main::STARFIELD_SIZE_MIN..consts_main::STARFIELD_SIZE_MAX),
+				size: rng.gen_range(
+					galactica_constants::STARFIELD_SIZE_MIN
+						..galactica_constants::STARFIELD_SIZE_MAX,
+				),
 				tint: Vector2 {
 					x: rng.gen_range(0.0..=1.0),
 					y: rng.gen_range(0.0..=1.0),
@@ -52,17 +57,17 @@ impl Starfield {
 	}
 
 	pub fn make_instances(&mut self, aspect: f32) -> Vec<StarfieldInstance> {
-		let sz = consts_main::STARFIELD_SIZE as f32;
+		let sz = galactica_constants::STARFIELD_SIZE as f32;
 
 		// Compute window size in starfield tiles
 		let mut nw_tile: Point2<i32> = {
 			// Game coordinates (relative to camera) of nw corner of screen.
-			let clip_nw = Point2::from((aspect, 1.0)) * consts_main::ZOOM_MAX;
+			let clip_nw = Point2::from((aspect, 1.0)) * galactica_constants::ZOOM_MAX;
 
 			// Parallax correction.
 			// Also, adjust v for mod to work properly
 			// (v is centered at 0)
-			let v: Point2<f32> = clip_nw * consts_main::STARFIELD_Z_MIN;
+			let v: Point2<f32> = clip_nw * galactica_constants::STARFIELD_Z_MIN;
 			let v_adj: Point2<f32> = (v.x + (sz / 2.0), v.y + (sz / 2.0)).into();
 
 			#[rustfmt::skip]
@@ -86,8 +91,10 @@ impl Starfield {
 
 		// Truncate tile grid to buffer size
 		// (The window won't be full of stars if our instance limit is too small)
-		while ((nw_tile.x * 2 + 1) * (nw_tile.y * 2 + 1) * consts_main::STARFIELD_COUNT as i32)
-			> consts::STARFIELD_INSTANCE_LIMIT as i32
+		while ((nw_tile.x * 2 + 1)
+			* (nw_tile.y * 2 + 1)
+			* galactica_constants::STARFIELD_COUNT as i32)
+			> galactica_constants::STARFIELD_INSTANCE_LIMIT as i32
 		{
 			nw_tile -= Vector2::from((1, 1));
 		}
@@ -112,7 +119,7 @@ impl Starfield {
 		}
 
 		// Enforce starfield limit
-		if instances.len() as u64 > consts::STARFIELD_INSTANCE_LIMIT {
+		if instances.len() as u64 > galactica_constants::STARFIELD_INSTANCE_LIMIT {
 			unreachable!("Starfield limit exceeded!")
 		}
 		self.instance_count = instances.len() as u32;

crates/shipbehavior/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "galactica-shipbehavior"
+version = "0.0.0"
+edition = "2021"
+
+[dependencies]
+galactica-content = { path = "../content" }
+galactica-world = { path = "../world" }
+cgmath = "0.18.0"

crates/shipbehavior/src/behavior/dummy.rs

@@ -0,0 +1,23 @@
+use crate::ShipBehavior;
+use galactica_content as content;
+use galactica_world::{ShipPhysicsHandle, World};
+
+/// Dummy ship behavior.
+/// Does nothing.
+pub struct Dummy {
+	_handle: ShipPhysicsHandle,
+}
+
+impl Dummy {
+	/// Create a new ship controller
+	pub fn new(handle: ShipPhysicsHandle) -> Self {
+		Self { _handle: handle }
+	}
+}
+
+impl ShipBehavior for Dummy {
+	fn update_controls(&mut self, _physics: &mut World, _content: &content::Content) {}
+	fn get_handle(&self) -> ShipPhysicsHandle {
+		return self._handle;
+	}
+}

crates/shipbehavior/src/behavior/mod.rs

@@ -0,0 +1,9 @@
+//! Various implementations of [`crate::ShipBehavior`]
+
+mod dummy;
+mod player;
+mod point;
+
+pub use dummy::Dummy;
+pub use player::Player;
+pub use point::Point;

crates/shipbehavior/src/behavior/player.rs

@@ -0,0 +1,48 @@
+use crate::ShipBehavior;
+use galactica_content as content;
+use galactica_world::{ShipPhysicsHandle, World};
+
+/// Player ship behavior.
+/// Controls a ship using controller input
+pub struct Player {
+	handle: ShipPhysicsHandle,
+
+	/// Turn left
+	pub key_left: bool,
+
+	/// Turn right
+	pub key_right: bool,
+
+	/// Fire guns
+	pub key_guns: bool,
+
+	/// Foward thrust
+	pub key_thrust: bool,
+}
+
+impl Player {
+	/// Make a new ship controller
+	pub fn new(handle: ShipPhysicsHandle) -> Self {
+		Self {
+			handle,
+			key_left: false,
+			key_right: false,
+			key_guns: false,
+			key_thrust: false,
+		}
+	}
+}
+
+impl ShipBehavior for Player {
+	fn update_controls(&mut self, physics: &mut World, _content: &content::Content) {
+		let s = physics.get_ship_mut(&self.handle).unwrap();
+		s.controls.left = self.key_left;
+		s.controls.right = self.key_right;
+		s.controls.guns = self.key_guns;
+		s.controls.thrust = self.key_thrust;
+	}
+
+	fn get_handle(&self) -> ShipPhysicsHandle {
+		return self.handle;
+	}
+}

crates/shipbehavior/src/behavior/point.rs

@@ -0,0 +1,82 @@
+use cgmath::{Deg, InnerSpace};
+
+use crate::ShipBehavior;
+use galactica_content as content;
+use galactica_world::{util, ShipPhysicsHandle, World};
+
+/// "Point" ship behavior.
+/// Point and shoot towards the nearest enemy.
+pub struct Point {
+	handle: ShipPhysicsHandle,
+}
+
+impl Point {
+	/// Create a new ship controller
+	pub fn new(handle: ShipPhysicsHandle) -> Self {
+		Self { handle }
+	}
+}
+
+impl ShipBehavior for Point {
+	fn update_controls(&mut self, physics: &mut World, content: &content::Content) {
+		// Turn off all controls
+		let s = physics.get_ship_mut(&self.handle).unwrap();
+		s.controls.left = false;
+		s.controls.right = false;
+		s.controls.guns = false;
+		s.controls.thrust = false;
+
+		let (my_s, my_r) = physics.get_ship_body(&self.handle).unwrap();
+		let my_position = util::rigidbody_position(my_r);
+		let my_rotation = util::rigidbody_rotation(my_r);
+		let my_angvel = my_r.angvel();
+		let my_faction = content.get_faction(my_s.ship.faction);
+
+		// Iterate all possible targets
+		let mut it = physics
+			.iter_ship_body()
+			.filter(
+				|(s, _)| match my_faction.relationships.get(&s.ship.faction).unwrap() {
+					content::Relationship::Hostile => true,
+					_ => false,
+				},
+			)
+			.map(|(_, r)| r);
+
+		// Find the closest target
+		let mut closest_enemy_position = match it.next() {
+			Some(c) => util::rigidbody_position(c),
+			None => return, // Do nothing if no targets are available
+		};
+		let mut d = (my_position - closest_enemy_position).magnitude();
+		for r in it {
+			let p = util::rigidbody_position(r);
+			let new_d = (my_position - p).magnitude();
+			if new_d < d {
+				d = new_d;
+				closest_enemy_position = p;
+			}
+		}
+
+		let angle_delta: Deg<f32> = (my_rotation)
+			.angle(closest_enemy_position - my_position)
+			.into();
+
+		let s = physics.get_ship_mut(&self.handle).unwrap();
+		s.controls.left = false;
+		s.controls.right = false;
+
+		if angle_delta < Deg(0.0) && my_angvel > -0.3 {
+			s.controls.right = true;
+		} else if angle_delta > Deg(0.0) && my_angvel < 0.3 {
+			s.controls.left = true;
+		}
+
+		s.controls.guns = true;
+		s.controls.thrust = false;
+	}
+
+	fn get_handle(&self) -> ShipPhysicsHandle {
+		return self.handle;
+	}
+}

crates/shipbehavior/src/lib.rs

@@ -0,0 +1,21 @@
+#![warn(missing_docs)]
+
+//! Computer-controlled ship behaviors
+
+pub mod behavior;
+
+use galactica_content as content;
+use galactica_world::{ShipPhysicsHandle, World};
+
+/// Main behavior trait. Any struct that implements this
+/// may be used to control a ship.
+pub trait ShipBehavior
+where
+	Self: Send,
+{
+	/// Update a ship's controls based on world state
+	fn update_controls(&mut self, physics: &mut World, content: &content::Content);
+
+	/// Get the ship this behavior is attached to
+	fn get_handle(&self) -> ShipPhysicsHandle;
+}

crates/world/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "galactica-world"
+version = "0.0.0"
+edition = "2021"
+
+[dependencies]
+galactica-render = { path = "../render" }
+galactica-content = { path = "../content" }
+galactica-gameobject = { path = "../gameobject" }
+
+rapier2d = { version = "0.17.2" }
+nalgebra = "0.32.3"
+crossbeam = "0.8.3"
+cgmath = "0.18.0"
+rand = "0.8.5"

crates/world/src/lib.rs

@@ -0,0 +1,17 @@
+#![warn(missing_docs)]
+
+//! This module keeps track of the visible world.
+//! Ships, projectiles, collisions, etc.
+
+pub mod objects;
+pub mod util;
+mod world;
+mod wrapper;
+
+pub use world::World;
+
+use rapier2d::{dynamics::RigidBodyHandle, geometry::ColliderHandle};
+
+/// A lightweight handle for a specific ship in our physics system
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub struct ShipPhysicsHandle(pub RigidBodyHandle, ColliderHandle);

crates/world/src/objects/mod.rs

@@ -1,7 +1,6 @@
 //! This module contains game objects that may interact with the physics engine.
-
 mod projectile;
 mod ship;
 
-pub use projectile::{Projectile, ProjectileBuilder};
-pub use ship::Ship;
+pub use projectile::ProjectileWorldObject;
+pub use ship::ShipWorldObject;

crates/world/src/objects/projectile.rs

@@ -0,0 +1,58 @@
+use cgmath::{Deg, InnerSpace, Point3, Vector2};
+use rapier2d::{
+	dynamics::{RigidBody, RigidBodyHandle},
+	geometry::ColliderHandle,
+};
+
+use crate::util;
+use galactica_gameobject as object;
+use galactica_render::ObjectSprite;
+
+/// A single projectile in the world
+#[derive(Debug)]
+pub struct ProjectileWorldObject {
+	/// TODO
+	pub projectile: object::Projectile,
+
+	/// TODO
+	pub rigid_body: RigidBodyHandle,
+
+	/// TODO
+	pub collider: ColliderHandle,
+}
+
+impl ProjectileWorldObject {
+	/// Make a new projectile
+	pub fn new(
+		projectile: object::Projectile,
+		rigid_body: RigidBodyHandle,
+		collider: ColliderHandle,
+	) -> Self {
+		ProjectileWorldObject {
+			rigid_body,
+			collider,
+			projectile,
+		}
+	}
+
+	/// Get this projectiles' sprite
+	pub fn get_sprite(&self, r: &RigidBody) -> ObjectSprite {
+		let pos = util::rigidbody_position(r);
+		let rot = util::rigidbody_rotation(r);
+
+		// Sprites point north at 0 degrees
+		let ang: Deg<f32> = rot.angle(Vector2 { x: 1.0, y: 0.0 }).into();
+
+		ObjectSprite {
+			texture: self.projectile.content.sprite_texture,
+			pos: Point3 {
+				x: pos.x,
+				y: pos.y,
+				z: 1.0,
+			},
+			size: self.projectile.content.size,
+			angle: -ang,
+			children: None,
+		}
+	}
+}

crates/world/src/objects/ship.rs

@@ -0,0 +1,100 @@
+use cgmath::{Deg, InnerSpace, Vector2};
+use nalgebra::vector;
+
+use rapier2d::dynamics::RigidBody;
+
+use crate::{util, ShipPhysicsHandle};
+use galactica_content as content;
+use galactica_gameobject as object;
+use galactica_render::ObjectSprite;
+
+pub struct ShipControls {
+	pub left: bool,
+	pub right: bool,
+	pub thrust: bool,
+	pub guns: bool,
+}
+
+impl ShipControls {
+	pub fn new() -> Self {
+		ShipControls {
+			left: false,
+			right: false,
+			thrust: false,
+			guns: false,
+		}
+	}
+}
+
+/// A ship instance in the physics system
+/// TODO: Decouple ship data from physics
+pub struct ShipWorldObject {
+	/// TODO
+	pub physics_handle: ShipPhysicsHandle,
+
+	/// TODO
+	pub ship: object::Ship,
+
+	/// TODO
+	pub controls: ShipControls,
+}
+
+impl ShipWorldObject {
+	/// Make a new ship
+	pub fn new(ship: object::Ship, physics_handle: ShipPhysicsHandle) -> Self {
+		ShipWorldObject {
+			physics_handle,
+			ship,
+			controls: ShipControls::new(),
+		}
+	}
+
+	/// Apply the effects of all active controls
+	pub fn tick(&mut self, r: &mut RigidBody, t: f32) {
+		let ship_rot = util::rigidbody_rotation(r);
+		let engine_force = ship_rot * t;
+
+		if self.controls.thrust {
+			r.apply_impulse(
+				vector![engine_force.x, engine_force.y] * self.ship.outfits.stats.engine_thrust,
+				true,
+			);
+		}
+
+		if self.controls.right {
+			r.apply_torque_impulse(self.ship.outfits.stats.steer_power * -100.0 * t, true);
+		}
+
+		if self.controls.left {
+			r.apply_torque_impulse(self.ship.outfits.stats.steer_power * 100.0 * t, true);
+		}
+
+		for i in self.ship.outfits.iter_guns() {
+			i.cooldown -= t;
+		}
+	}
+
+	/// Get this ship's sprite
+	pub fn get_sprite(&self, ct: &content::Content, r: &RigidBody) -> ObjectSprite {
+		let ship_pos = util::rigidbody_position(r);
+		let ship_rot = util::rigidbody_rotation(r);
+
+		// Sprites point north at 0 degrees
+		let ship_ang: Deg<f32> = ship_rot.angle(Vector2 { x: 0.0, y: 1.0 }).into();
+
+		let s = ct.get_ship(self.ship.handle);
+
+		ObjectSprite {
+			pos: (ship_pos.x, ship_pos.y, 1.0).into(),
+			texture: s.sprite_texture,
+			angle: -ship_ang,
+			size: s.size,
+
+			children: if self.controls.thrust {
+				Some(self.ship.outfits.get_engine_flares())
+			} else {
+				None
+			},
+		}
+	}
+}

crates/world/src/util.rs

@@ -1,7 +1,12 @@
+//! Conversion utilities
+
 use cgmath::{Point2, Vector2};
 use nalgebra;
 use rapier2d::dynamics::RigidBody;
 
+// TODO: Migrate to nalgebra fully, remove these converters
+
+/// Convert a rigidbody position to a position in game coordinates
 pub fn rigidbody_position(r: &RigidBody) -> cgmath::Point2<f32> {
 	Point2 {
 		x: r.translation()[0],
@@ -9,6 +14,7 @@ pub fn rigidbody_position(r: &RigidBody) -> cgmath::Point2<f32> {
 	}
 }
 
+/// Convert a rigidbody rotation to a rotation in game coordinates
 pub fn rigidbody_rotation(r: &RigidBody) -> Vector2<f32> {
 	Vector2 {
 		x: r.rotation().re,
@@ -16,6 +22,7 @@ pub fn rigidbody_rotation(r: &RigidBody) -> Vector2<f32> {
 	}
 }
 
+/// Convert a rigidbody velocity to a velocity in game coordinates
 pub fn rigidbody_velocity(r: &RigidBody) -> cgmath::Vector2<f32> {
 	let v = r.velocity_at_point(&nalgebra::Point2::new(
 		r.translation()[0],

crates/world/src/world.rs

@@ -0,0 +1,283 @@
+use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Point2, Rad, Vector2};
+use crossbeam::channel::Receiver;
+use nalgebra::vector;
+use rand::Rng;
+use rapier2d::{
+	dynamics::{RigidBody, RigidBodyBuilder, RigidBodyHandle},
+	geometry::{ColliderBuilder, ColliderHandle, CollisionEvent},
+	pipeline::{ActiveEvents, ChannelEventCollector},
+};
+use std::{collections::HashMap, f32::consts::PI};
+
+use crate::{objects, objects::ProjectileWorldObject, util, wrapper::Wrapper, ShipPhysicsHandle};
+use galactica_content as content;
+use galactica_gameobject as object;
+use galactica_render::ObjectSprite;
+
+/// Keeps track of all objects in the world that we can interact with.
+/// Also wraps our physics engine
+pub struct World {
+	wrapper: Wrapper,
+	projectiles: HashMap<ColliderHandle, objects::ProjectileWorldObject>,
+	ships: HashMap<ColliderHandle, objects::ShipWorldObject>,
+
+	collision_handler: ChannelEventCollector,
+	collision_queue: Receiver<CollisionEvent>,
+}
+
+// Private methods
+impl<'a> World {
+	fn remove_projectile(&mut self, c: ColliderHandle) {
+		let p = match self.projectiles.remove(&c) {
+			Some(p) => p,
+			None => return,
+		};
+		self.wrapper.rigid_body_set.remove(
+			p.rigid_body,
+			&mut self.wrapper.im,
+			&mut self.wrapper.collider_set,
+			&mut self.wrapper.ij,
+			&mut self.wrapper.mj,
+			true,
+		);
+	}
+
+	fn remove_ship(&mut self, h: ShipPhysicsHandle) {
+		self.wrapper.rigid_body_set.remove(
+			h.0,
+			&mut self.wrapper.im,
+			&mut self.wrapper.collider_set,
+			&mut self.wrapper.ij,
+			&mut self.wrapper.mj,
+			true,
+		);
+		self.ships.remove(&h.1);
+	}
+
+	/// Add a projectile fired from a ship
+	fn add_projectiles(
+		&mut self,
+		s: &ShipPhysicsHandle,
+		p: Vec<(object::Projectile, content::GunPoint)>,
+	) {
+		let mut rng = rand::thread_rng();
+		for (projectile, point) in p {
+			let r = self.get_ship_body(&s).unwrap().1;
+
+			let ship_pos = util::rigidbody_position(r);
+			let ship_rot = util::rigidbody_rotation(r);
+			let ship_vel = util::rigidbody_velocity(r);
+			let ship_ang = ship_rot.angle(Vector2 { x: 0.0, y: 1.0 });
+
+			let pos = ship_pos + (Matrix2::from_angle(-ship_ang) * point.pos.to_vec());
+
+			let spread: Rad<f32> = Deg(rng.gen_range(
+				-(projectile.content.angle_rng.0 / 2.0)..=projectile.content.angle_rng.0 / 2.0,
+			))
+			.into();
+
+			let vel = ship_vel
+				+ (Matrix2::from_angle(-ship_ang + spread)
+					* Vector2 {
+						x: 0.0,
+						y: projectile.content.speed
+							+ rng.gen_range(
+								-projectile.content.speed_rng..=projectile.content.speed_rng,
+							),
+					});
+
+			let rigid_body = RigidBodyBuilder::kinematic_velocity_based()
+				.translation(vector![pos.x, pos.y])
+				.rotation(-ship_ang.0)
+				.linvel(vector![vel.x, vel.y])
+				.build();
+
+			let collider = ColliderBuilder::ball(5.0)
+				.sensor(true)
+				.active_events(ActiveEvents::COLLISION_EVENTS)
+				.build();
+
+			let rigid_body = self.wrapper.rigid_body_set.insert(rigid_body);
+			let collider = self.wrapper.collider_set.insert_with_parent(
+				collider,
+				rigid_body,
+				&mut self.wrapper.rigid_body_set,
+			);
+
+			self.projectiles.insert(
+				collider.clone(),
+				ProjectileWorldObject {
+					projectile: projectile,
+					rigid_body,
+					collider,
+				},
+			);
+		}
+	}
+}
+
+// Public methods
+impl<'a> World {
+	/// Create a new physics system
+	pub fn new() -> Self {
+		let (collision_send, collision_queue) = crossbeam::channel::unbounded();
+		let (contact_force_send, _) = crossbeam::channel::unbounded();
+
+		Self {
+			wrapper: Wrapper::new(),
+			projectiles: HashMap::new(),
+			ships: HashMap::new(),
+			collision_handler: ChannelEventCollector::new(collision_send, contact_force_send),
+			collision_queue,
+		}
+	}
+
+	/// Add a ship to this physics system
+	/// TODO: decouple from Ship::new()
+	pub fn add_ship(
+		&mut self,
+		ct: &content::Content,
+		ship: object::Ship,
+		position: Point2<f32>,
+	) -> ShipPhysicsHandle {
+		let ship_content = ct.get_ship(ship.handle);
+		let cl = ColliderBuilder::convex_decomposition(
+			&ship_content.collision.points[..],
+			&ship_content.collision.indices[..],
+		)
+		// Rotate collider to match sprite
+		// (Collider starts pointing east, sprite starts pointing north.)
+		.rotation(PI / -2.0)
+		.mass(ship_content.mass);
+
+		let rb = RigidBodyBuilder::dynamic()
+			.angular_damping(ship_content.angular_drag)
+			.linear_damping(ship_content.linear_drag)
+			.translation(vector![position.x, position.y])
+			.can_sleep(false);
+
+		let r = self.wrapper.rigid_body_set.insert(rb.build());
+		let c = self.wrapper.collider_set.insert_with_parent(
+			cl.build(),
+			r,
+			&mut self.wrapper.rigid_body_set,
+		);
+
+		let h = ShipPhysicsHandle(r, c);
+		self.ships.insert(c, objects::ShipWorldObject::new(ship, h));
+		return h;
+	}
+
+	/// Step this physics system by `t` seconds
+	pub fn step(&mut self, t: f32, ct: &content::Content) {
+		// Run ship updates
+		// TODO: Clean this mess
+		let mut ps = Vec::new();
+		let mut to_remove = Vec::new();
+		for (_, s) in &mut self.ships {
+			if s.ship.hull <= 0.0 {
+				to_remove.push(s.physics_handle);
+				continue;
+			}
+			let r = &mut self.wrapper.rigid_body_set[s.physics_handle.0];
+			s.tick(r, t);
+			if s.controls.guns {
+				ps.push((s.physics_handle, s.ship.fire_guns()));
+			}
+		}
+		for r in to_remove {
+			self.remove_ship(r);
+		}
+		for (s, p) in ps {
+			self.add_projectiles(&s, p);
+		}
+
+		// Update physics
+		self.wrapper.step(t, &self.collision_handler);
+
+		// Handle collision events
+		while let Ok(event) = &self.collision_queue.try_recv() {
+			if event.started() {
+				let a = &event.collider1();
+				let b = &event.collider2();
+
+				// If projectiles are part of this collision, make sure
+				// `a` is one of them.
+				let (a, b) = if self.projectiles.contains_key(b) {
+					(b, a)
+				} else {
+					(a, b)
+				};
+
+				if let Some(p) = self.projectiles.get(a) {
+					if let Some(s) = self.ships.get_mut(b) {
+						let hit = s.ship.handle_projectile_collision(ct, &p.projectile);
+						if hit {
+							self.remove_projectile(*a);
+						}
+					}
+				}
+			}
+		}
+
+		// Delete projectiles
+		let mut to_remove = Vec::new();
+		for (_, p) in &mut self.projectiles {
+			p.projectile.tick(t);
+			if p.projectile.is_expired() {
+				to_remove.push(p.collider);
+			}
+		}
+		for i in to_remove {
+			self.remove_projectile(i);
+		}
+	}
+
+	/// Get a rigid body from a handle
+	pub fn get_rigid_body(&self, r: RigidBodyHandle) -> &RigidBody {
+		&self.wrapper.rigid_body_set[r]
+	}
+
+	/// Get a ship from a handle
+	pub fn get_ship_mut(&mut self, s: &ShipPhysicsHandle) -> Option<&mut objects::ShipWorldObject> {
+		self.ships.get_mut(&s.1)
+	}
+
+	/// Get a ship and its rigidbody from a handle
+	pub fn get_ship_body(
+		&self,
+		s: &ShipPhysicsHandle,
+	) -> Option<(&objects::ShipWorldObject, &RigidBody)> {
+		// TODO: handle dead handles
+		Some((self.ships.get(&s.1)?, self.wrapper.rigid_body_set.get(s.0)?))
+	}
+
+	/// Iterate over all ships in this physics system
+	pub fn iter_ship_body(
+		&self,
+	) -> impl Iterator<Item = (&objects::ShipWorldObject, &RigidBody)> + '_ {
+		self.ships.values().map(|x| {
+			(
+				x,
+				self.wrapper.rigid_body_set.get(x.physics_handle.0).unwrap(),
+			)
+		})
+	}
+
+	/// Iterate over all ship sprites in this physics system
+	pub fn get_ship_sprites(
+		&'a self,
+		ct: &'a content::Content,
+	) -> impl Iterator<Item = ObjectSprite> + '_ {
+		self.ships
+			.values()
+			.map(|x| x.get_sprite(ct, &self.wrapper.rigid_body_set[x.physics_handle.0]))
+	}
+
+	/// Iterate over all projectile sprites in this physics system
+	pub fn get_projectile_sprites(&self) -> impl Iterator<Item = ObjectSprite> + '_ {
+		self.projectiles
+			.values()
+			.map(|x| x.get_sprite(&self.wrapper.rigid_body_set[x.rigid_body]))
+	}
+}

crates/world/src/wrapper.rs

@@ -8,7 +8,7 @@ use rapier2d::{
 	pipeline::{EventHandler, PhysicsPipeline},
 };
 
-pub(super) struct Wrapper {
+pub(crate) struct Wrapper {
 	pub rigid_body_set: RigidBodySet,
 	pub collider_set: ColliderSet,
 

src/consts.rs

@@ -1,11 +0,0 @@
-pub const ZOOM_MIN: f32 = 200.0;
-pub const ZOOM_MAX: f32 = 2000.0;
-
-/// Name of starfield texture
-pub const STARFIELD_TEXTURE_NAME: &'static str = "starfield";
-
-/// Root directory of game content
-pub const CONTENT_ROOT: &'static str = "./content";
-
-/// Root directory of game textures
-pub const TEXTURE_ROOT: &'static str = "./assets/render";

src/game/game.rs

@@ -1,15 +1,15 @@
 use cgmath::{Deg, InnerSpace, Point2};
-use galactica_render::{AnchoredUiPosition, ObjectSprite, UiSprite};
+use content::SystemHandle;
 use std::time::Instant;
 use winit::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, VirtualKeyCode};
 
-use super::{camera::Camera, outfits, system::System};
-use crate::{
-	consts, content,
-	inputstatus::InputStatus,
-	physics::{util, Physics, ShipHandle},
-	shipbehavior::{self, ShipBehavior},
-};
+use super::camera::Camera;
+use crate::{content, inputstatus::InputStatus};
+use galactica_constants;
+use galactica_gameobject as object;
+use galactica_render::{AnchoredUiPosition, ObjectSprite, UiSprite};
+use galactica_shipbehavior::{behavior, ShipBehavior};
+use galactica_world::{util, ShipPhysicsHandle, World};
 
 struct Ui {}
 
@@ -20,8 +20,8 @@ impl Ui {
 
 	fn build_radar(
 		&self,
-		player: &ShipHandle,
-		physics: &Physics,
+		player: &ShipPhysicsHandle,
+		physics: &World,
 		ct: &content::Content,
 	) -> Vec<UiSprite> {
 		let mut out = Vec::new();
@@ -70,58 +70,69 @@ impl Ui {
 pub struct Game {
 	pub input: InputStatus,
 	pub last_update: Instant,
-	pub player: ShipHandle,
-	pub system: System,
+	pub player: ShipPhysicsHandle,
+	pub system: object::System,
 	pub camera: Camera,
 	paused: bool,
 	pub time_scale: f32,
 
 	ui: Ui,
-	physics: Physics,
+	physics: World,
 	shipbehaviors: Vec<Box<dyn ShipBehavior>>,
+	playerbehavior: behavior::Player,
 	content: content::Content,
 }
 
 impl Game {
 	pub fn new(ct: content::Content) -> Self {
-		let mut physics = Physics::new();
+		let mut physics = World::new();
+		let ss = ct.get_ship(content::ShipHandle { index: 0 });
 
-		let mut o1 = outfits::ShipOutfits::new(&ct.ships[0]);
-		o1.add(ct.outfits[0].clone());
-		o1.add_gun(ct.guns[0].clone());
-		o1.add_gun(ct.guns[0].clone());
+		let mut o1 = object::OutfitSet::new(ss);
+		o1.add(&ct, content::OutfitHandle { index: 0 });
+		o1.add_gun(&ct, content::GunHandle { index: 0 });
+		o1.add_gun(&ct, content::GunHandle { index: 0 });
 
-		let h1 = physics.add_ship(
-			&ct.ships[0],
+		let s = object::Ship::new(
+			&ct,
+			content::ShipHandle { index: 0 },
+			content::FactionHandle { index: 0 },
 			o1,
-			Point2 { x: 0.0, y: 0.0 },
-			content::FactionHandle { index: 0 },
 		);
 
-		let h2 = physics.add_ship(
-			&ct.ships[0],
-			outfits::ShipOutfits::new(&ct.ships[0]),
-			Point2 { x: 300.0, y: 300.0 },
+		let h1 = physics.add_ship(&ct, s, Point2 { x: 0.0, y: 0.0 });
+
+		let s = object::Ship::new(
+			&ct,
+			content::ShipHandle { index: 0 },
 			content::FactionHandle { index: 0 },
+			object::OutfitSet::new(ss),
+		);
+		let h2 = physics.add_ship(&ct, s, Point2 { x: 300.0, y: 300.0 });
+
+		let mut o1 = object::OutfitSet::new(ss);
+		o1.add(&ct, content::OutfitHandle { index: 0 });
+		o1.add_gun(&ct, content::GunHandle { index: 0 });
+
+		let s = object::Ship::new(
+			&ct,
+			content::ShipHandle { index: 0 },
+			content::FactionHandle { index: 1 },
+			o1,
 		);
 
-		let mut o2 = outfits::ShipOutfits::new(&ct.ships[0]);
-		o2.add(ct.outfits[0].clone());
-		o2.add_gun(ct.guns[0].clone());
 		let h3 = physics.add_ship(
-			&ct.ships[0],
-			o2,
+			&ct,
+			s,
 			Point2 {
 				x: -300.0,
 				y: 300.0,
 			},
-			content::FactionHandle { index: 1 },
 		);
 
 		let mut shipbehaviors: Vec<Box<dyn ShipBehavior>> = Vec::new();
-		shipbehaviors.push(shipbehavior::Player::new(h1));
-		shipbehaviors.push(shipbehavior::Dummy::new(h2));
-		shipbehaviors.push(shipbehavior::Point::new(h3));
+		shipbehaviors.push(Box::new(behavior::Dummy::new(h2)));
+		shipbehaviors.push(Box::new(behavior::Point::new(h3)));
 
 		Game {
 			last_update: Instant::now(),
@@ -132,13 +143,14 @@ impl Game {
 				pos: (0.0, 0.0).into(),
 				zoom: 500.0,
 			},
-			system: System::new(&ct.systems[0]),
+			system: object::System::new(&ct, SystemHandle { index: 0 }),
 
 			paused: false,
 			time_scale: 1.0,
 			physics,
 			shipbehaviors,
 			content: ct,
+			playerbehavior: behavior::Player::new(h1),
 			ui: Ui::new(),
 		}
 	}
@@ -167,11 +179,19 @@ impl Game {
 	pub fn update(&mut self) {
 		let t: f32 = self.last_update.elapsed().as_secs_f32() * self.time_scale;
 
+		self.playerbehavior.key_guns = self.input.key_guns;
+		self.playerbehavior.key_thrust = self.input.key_thrust;
+		self.playerbehavior.key_right = self.input.key_right;
+		self.playerbehavior.key_left = self.input.key_left;
+		self.playerbehavior
+			.update_controls(&mut self.physics, &self.content);
+
 		self.shipbehaviors.retain_mut(|b| {
+			// Remove shipbehaviors of destroyed ships
 			if self.physics.get_ship_mut(&b.get_handle()).is_none() {
 				false
 			} else {
-				b.update_controls(&mut self.physics, &self.input, &self.content);
+				b.update_controls(&mut self.physics, &self.content);
 				true
 			}
 		});
@@ -179,8 +199,8 @@ impl Game {
 		self.physics.step(t, &self.content);
 
 		if self.input.v_scroll != 0.0 {
-			self.camera.zoom =
-				(self.camera.zoom + self.input.v_scroll).clamp(consts::ZOOM_MIN, consts::ZOOM_MAX);
+			self.camera.zoom = (self.camera.zoom + self.input.v_scroll)
+				.clamp(galactica_constants::ZOOM_MIN, galactica_constants::ZOOM_MAX);
 			self.input.v_scroll = 0.0;
 		}
 
@@ -200,7 +220,7 @@ impl Game {
 		let mut sprites: Vec<ObjectSprite> = Vec::new();
 
 		sprites.append(&mut self.system.get_sprites());
-		sprites.extend(self.physics.get_ship_sprites());
+		sprites.extend(self.physics.get_ship_sprites(&self.content));
 
 		// Make sure sprites are drawn in the correct order
 		// (note the reversed a, b in the comparator)

src/game/mod.rs

@@ -1,10 +1,6 @@
-//! This module contains high-level game control routines.
+//! This module is responsible for high-level game control logic.
 
 mod camera;
 mod game;
-pub mod outfits;
-mod system;
-mod systemobject;
 
 pub use game::Game;
-pub use systemobject::SystemObject;

src/main.rs

@@ -1,13 +1,10 @@
-mod consts;
 mod game;
 mod inputstatus;
-mod objects;
-mod physics;
-mod shipbehavior;
 
 pub use galactica_content as content;
 
 use anyhow::Result;
+use galactica_constants;
 use std::path::PathBuf;
 use winit::{
 	event::{Event, KeyboardInput, WindowEvent},
@@ -18,9 +15,9 @@ use winit::{
 fn main() -> Result<()> {
 	// TODO: error if missing
 	let content = content::Content::load_dir(
-		PathBuf::from(consts::CONTENT_ROOT),
-		PathBuf::from(consts::TEXTURE_ROOT),
-		consts::STARFIELD_TEXTURE_NAME.to_owned(),
+		PathBuf::from(galactica_constants::CONTENT_ROOT),
+		PathBuf::from(galactica_constants::TEXTURE_ROOT),
+		galactica_constants::STARFIELD_TEXTURE_NAME.to_owned(),
 	)?;
 
 	let event_loop = EventLoop::new();

src/objects/projectile.rs

@@ -1,73 +0,0 @@
-use cgmath::{Deg, InnerSpace, Point3, Vector2};
-use galactica_render::ObjectSprite;
-use rapier2d::{
-	dynamics::{RigidBody, RigidBodyBuilder, RigidBodyHandle},
-	geometry::{ColliderBuilder, ColliderHandle},
-};
-
-use crate::{content, physics::util};
-
-pub struct ProjectileBuilder {
-	pub rigid_body: RigidBodyBuilder,
-	pub collider: ColliderBuilder,
-	pub sprite_texture: content::TextureHandle,
-	pub lifetime: f32,
-	pub size: f32,
-	pub damage: f32,
-	pub faction: content::FactionHandle,
-}
-
-impl ProjectileBuilder {
-	pub fn build(self, r: RigidBodyHandle, c: ColliderHandle) -> Projectile {
-		Projectile {
-			rigid_body: r,
-			collider: c,
-			sprite_texture: self.sprite_texture,
-			lifetime: self.lifetime,
-			size: self.size,
-			damage: self.damage,
-			faction: self.faction,
-		}
-	}
-}
-
-#[derive(Debug)]
-pub struct Projectile {
-	pub rigid_body: RigidBodyHandle,
-	pub collider: ColliderHandle,
-	pub sprite_texture: content::TextureHandle,
-	pub lifetime: f32,
-	pub size: f32,
-	pub damage: f32,
-	pub faction: content::FactionHandle,
-}
-
-impl Projectile {
-	pub fn tick(&mut self, t: f32) {
-		self.lifetime -= t;
-	}
-
-	pub fn is_expired(&self) -> bool {
-		return self.lifetime < 0.0;
-	}
-
-	pub fn get_sprite(&self, r: &RigidBody) -> ObjectSprite {
-		let pos = util::rigidbody_position(r);
-		let rot = util::rigidbody_rotation(r);
-
-		// Sprites point north at 0 degrees
-		let ang: Deg<f32> = rot.angle(Vector2 { x: 1.0, y: 0.0 }).into();
-
-		ObjectSprite {
-			texture: self.sprite_texture,
-			pos: Point3 {
-				x: pos.x,
-				y: pos.y,
-				z: 1.0,
-			},
-			size: self.size,
-			angle: -ang,
-			children: None,
-		}
-	}
-}

src/objects/ship.rs

@@ -1,180 +0,0 @@
-use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Rad, Vector2};
-use content::{FactionHandle, TextureHandle};
-use galactica_render::ObjectSprite;
-use nalgebra::vector;
-use rand::Rng;
-use rapier2d::{
-	dynamics::{RigidBody, RigidBodyBuilder},
-	geometry::ColliderBuilder,
-	pipeline::ActiveEvents,
-};
-
-use super::ProjectileBuilder;
-use crate::{
-	content,
-	game::outfits,
-	physics::{util, ShipHandle},
-};
-
-pub struct ShipTickResult {
-	pub projectiles: Vec<ProjectileBuilder>,
-}
-
-pub struct ShipControls {
-	pub left: bool,
-	pub right: bool,
-	pub thrust: bool,
-	pub guns: bool,
-}
-
-impl ShipControls {
-	pub fn new() -> Self {
-		ShipControls {
-			left: false,
-			right: false,
-			thrust: false,
-			guns: false,
-		}
-	}
-}
-
-pub struct Ship {
-	pub physics_handle: ShipHandle,
-	pub faction: FactionHandle,
-	pub hull: f32,
-	pub controls: ShipControls,
-
-	outfits: outfits::ShipOutfits,
-	sprite_texture: TextureHandle,
-	size: f32,
-}
-
-impl Ship {
-	pub fn new(
-		c: &content::Ship,
-		outfits: outfits::ShipOutfits,
-		physics_handle: ShipHandle,
-		faction: FactionHandle,
-	) -> Self {
-		Ship {
-			physics_handle,
-			outfits,
-			sprite_texture: c.sprite_texture,
-			size: c.size,
-			hull: c.hull,
-			controls: ShipControls::new(),
-			faction,
-		}
-	}
-
-	pub fn fire_guns(&mut self, r: &RigidBody) -> Vec<ProjectileBuilder> {
-		let mut rng = rand::thread_rng();
-		let mut out = Vec::new();
-
-		for (g, p) in self.outfits.iter_guns_points() {
-			if g.cooldown > 0.0 {
-				continue;
-			}
-
-			g.cooldown = g.kind.rate + rng.gen_range(-g.kind.rate_rng..=g.kind.rate_rng);
-
-			let ship_pos = util::rigidbody_position(r);
-			let ship_rot = util::rigidbody_rotation(r);
-			let ship_vel = util::rigidbody_velocity(r);
-			let ship_ang = ship_rot.angle(Vector2 { x: 0.0, y: 1.0 });
-
-			let pos = ship_pos + (Matrix2::from_angle(-ship_ang) * p.pos.to_vec());
-
-			let spread: Rad<f32> =
-				Deg(rng.gen_range(-(g.kind.spread.0 / 2.0)..=g.kind.spread.0 / 2.0)).into();
-
-			let vel = ship_vel
-				+ (Matrix2::from_angle(-ship_ang + spread)
-					* Vector2 {
-						x: 0.0,
-						y: g.kind.projectile.speed
-							+ rng.gen_range(
-								-g.kind.projectile.speed_rng..=g.kind.projectile.speed_rng,
-							),
-					});
-
-			let p_r = RigidBodyBuilder::kinematic_velocity_based()
-				.translation(vector![pos.x, pos.y])
-				.rotation(-ship_ang.0)
-				.linvel(vector![vel.x, vel.y]);
-
-			let p_c = ColliderBuilder::ball(5.0)
-				.sensor(true)
-				.active_events(ActiveEvents::COLLISION_EVENTS);
-
-			out.push(ProjectileBuilder {
-				rigid_body: p_r,
-				collider: p_c,
-				sprite_texture: g.kind.projectile.sprite_texture,
-				lifetime: g.kind.projectile.lifetime
-					+ rng.gen_range(
-						-g.kind.projectile.lifetime_rng..=g.kind.projectile.lifetime_rng,
-					),
-				size: g.kind.projectile.size
-					+ rng.gen_range(-g.kind.projectile.size_rng..=g.kind.projectile.size_rng),
-				damage: g.kind.projectile.damage, // TODO: kind as param to builder
-				faction: self.faction,
-			})
-		}
-		return out;
-	}
-
-	/// Apply the effects of all active controls
-	pub fn apply_controls(&mut self, r: &mut RigidBody, t: f32) -> ShipTickResult {
-		let ship_rot = util::rigidbody_rotation(r);
-		let engine_force = ship_rot * t;
-
-		if self.controls.thrust {
-			r.apply_impulse(
-				vector![engine_force.x, engine_force.y] * self.outfits.stats.engine_thrust,
-				true,
-			);
-		}
-
-		if self.controls.right {
-			r.apply_torque_impulse(self.outfits.stats.steer_power * -100.0 * t, true);
-		}
-
-		if self.controls.left {
-			r.apply_torque_impulse(self.outfits.stats.steer_power * 100.0 * t, true);
-		}
-
-		let p = if self.controls.guns {
-			self.fire_guns(r)
-		} else {
-			Vec::new()
-		};
-
-		for i in self.outfits.iter_guns() {
-			i.cooldown -= t;
-		}
-
-		return ShipTickResult { projectiles: p };
-	}
-
-	pub fn get_sprite(&self, r: &RigidBody) -> ObjectSprite {
-		let ship_pos = util::rigidbody_position(r);
-		let ship_rot = util::rigidbody_rotation(r);
-
-		// Sprites point north at 0 degrees
-		let ship_ang: Deg<f32> = ship_rot.angle(Vector2 { x: 0.0, y: 1.0 }).into();
-
-		ObjectSprite {
-			pos: (ship_pos.x, ship_pos.y, 1.0).into(),
-			texture: self.sprite_texture,
-			angle: -ship_ang,
-			size: self.size,
-
-			children: if self.controls.thrust {
-				Some(self.outfits.get_engine_flares())
-			} else {
-				None
-			},
-		}
-	}
-}

src/physics/mod.rs

@@ -1,10 +0,0 @@
-mod physics;
-pub mod util;
-mod wrapper;
-
-pub use physics::Physics;
-
-use rapier2d::{dynamics::RigidBodyHandle, geometry::ColliderHandle};
-
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
-pub struct ShipHandle(pub(super) RigidBodyHandle, ColliderHandle);

src/physics/physics.rs

@@ -1,219 +0,0 @@
-use cgmath::Point2;
-use crossbeam::channel::Receiver;
-use galactica_render::ObjectSprite;
-use nalgebra::vector;
-use rapier2d::{
-	dynamics::{RigidBody, RigidBodyBuilder, RigidBodyHandle},
-	geometry::{ColliderBuilder, ColliderHandle, CollisionEvent},
-	pipeline::ChannelEventCollector,
-};
-use std::{collections::HashMap, f32::consts::PI};
-
-use super::{wrapper::Wrapper, ShipHandle};
-use crate::{content, game::outfits, objects};
-
-/// Keeps track of all objects in the world that we can interact with.
-/// Also wraps our physics engine
-pub struct Physics {
-	wrapper: Wrapper,
-	projectiles: HashMap<ColliderHandle, objects::Projectile>,
-	ships: HashMap<ColliderHandle, objects::Ship>,
-
-	collision_handler: ChannelEventCollector,
-	collision_queue: Receiver<CollisionEvent>,
-}
-
-// Private methods
-impl Physics {
-	fn remove_projectile(&mut self, c: ColliderHandle) {
-		let p = match self.projectiles.remove(&c) {
-			Some(p) => p,
-			None => return,
-		};
-		self.wrapper.rigid_body_set.remove(
-			p.rigid_body,
-			&mut self.wrapper.im,
-			&mut self.wrapper.collider_set,
-			&mut self.wrapper.ij,
-			&mut self.wrapper.mj,
-			true,
-		);
-	}
-
-	fn remove_ship(&mut self, h: ShipHandle) {
-		self.wrapper.rigid_body_set.remove(
-			h.0,
-			&mut self.wrapper.im,
-			&mut self.wrapper.collider_set,
-			&mut self.wrapper.ij,
-			&mut self.wrapper.mj,
-			true,
-		);
-		self.ships.remove(&h.1);
-	}
-
-	fn add_projectile(&mut self, pb: objects::ProjectileBuilder) -> ColliderHandle {
-		let r = self.wrapper.rigid_body_set.insert(pb.rigid_body.build());
-		let c = self.wrapper.collider_set.insert_with_parent(
-			pb.collider.build(),
-			r,
-			&mut self.wrapper.rigid_body_set,
-		);
-		self.projectiles.insert(c, pb.build(r, c));
-		return c;
-	}
-}
-
-// Public methods
-impl Physics {
-	pub fn new() -> Self {
-		let (collision_send, collision_queue) = crossbeam::channel::unbounded();
-		let (contact_force_send, _) = crossbeam::channel::unbounded();
-
-		Self {
-			wrapper: Wrapper::new(),
-			projectiles: HashMap::new(),
-			ships: HashMap::new(),
-			collision_handler: ChannelEventCollector::new(collision_send, contact_force_send),
-			collision_queue,
-		}
-	}
-
-	pub fn add_ship(
-		&mut self,
-		ct: &content::Ship,
-		outfits: outfits::ShipOutfits,
-		position: Point2<f32>,
-		faction: content::FactionHandle,
-	) -> ShipHandle {
-		let cl = ColliderBuilder::convex_decomposition(
-			&ct.collision.points[..],
-			&ct.collision.indices[..],
-		)
-		// Rotate collider to match sprite
-		// (Collider starts pointing east, sprite starts pointing north.)
-		.rotation(PI / -2.0)
-		.mass(ct.mass);
-
-		let rb = RigidBodyBuilder::dynamic()
-			.angular_damping(ct.angular_drag)
-			.linear_damping(ct.linear_drag)
-			.translation(vector![position.x, position.y])
-			.can_sleep(false);
-
-		let r = self.wrapper.rigid_body_set.insert(rb.build());
-		let c = self.wrapper.collider_set.insert_with_parent(
-			cl.build(),
-			r,
-			&mut self.wrapper.rigid_body_set,
-		);
-
-		let h = ShipHandle(r, c);
-		self.ships
-			.insert(c, objects::Ship::new(ct, outfits, h, faction));
-		return h;
-	}
-
-	pub fn step(&mut self, t: f32, ct: &content::Content) {
-		// Run ship updates
-		let mut res = Vec::new();
-		let mut to_remove = Vec::new();
-		for (_, s) in &mut self.ships {
-			if s.hull <= 0.0 {
-				to_remove.push(s.physics_handle);
-				continue;
-			}
-			let r = &mut self.wrapper.rigid_body_set[s.physics_handle.0];
-			res.push(s.apply_controls(r, t));
-		}
-		for r in to_remove {
-			self.remove_ship(r);
-		}
-		for r in res {
-			for p in r.projectiles {
-				self.add_projectile(p);
-			}
-		}
-
-		// Update physics
-		self.wrapper.step(t, &self.collision_handler);
-
-		// Handle collision events
-		while let Ok(event) = &self.collision_queue.try_recv() {
-			if event.started() {
-				let a = &event.collider1();
-				let b = &event.collider2();
-
-				// If projectiles are a part of this collision, make sure
-				// `a` is one of them.
-				let (a, b) = if self.projectiles.contains_key(b) {
-					(b, a)
-				} else {
-					(a, b)
-				};
-
-				if let Some(p) = self.projectiles.get(a) {
-					if let Some(s) = self.ships.get_mut(b) {
-						let p_faction = ct.get_faction(p.faction);
-						let r = p_faction.relationships[&s.faction];
-						match r {
-							content::Relationship::Hostile => {
-								// TODO: implement death and spawning, and enable damage
-								//s.hull -= p.damage;
-								self.remove_projectile(*a);
-								self.remove_projectile(*b);
-							}
-							_ => {}
-						}
-					}
-				}
-			}
-		}
-
-		// Delete projectiles
-		let mut to_remove = Vec::new();
-		for (_, p) in &mut self.projectiles {
-			p.tick(t);
-			if p.is_expired() {
-				to_remove.push(p.collider);
-			}
-		}
-		for i in to_remove {
-			self.remove_projectile(i);
-		}
-	}
-
-	pub fn get_rigid_body(&self, r: RigidBodyHandle) -> &RigidBody {
-		&self.wrapper.rigid_body_set[r]
-	}
-
-	pub fn get_ship_mut(&mut self, s: &ShipHandle) -> Option<&mut objects::Ship> {
-		self.ships.get_mut(&s.1)
-	}
-
-	pub fn get_ship_body(&self, s: &ShipHandle) -> Option<(&objects::Ship, &RigidBody)> {
-		// TODO: handle dead handles
-		Some((self.ships.get(&s.1)?, self.wrapper.rigid_body_set.get(s.0)?))
-	}
-
-	pub fn iter_ship_body(&self) -> impl Iterator<Item = (&objects::Ship, &RigidBody)> + '_ {
-		self.ships.values().map(|x| {
-			(
-				x,
-				self.wrapper.rigid_body_set.get(x.physics_handle.0).unwrap(),
-			)
-		})
-	}
-
-	pub fn get_ship_sprites(&self) -> impl Iterator<Item = ObjectSprite> + '_ {
-		self.ships
-			.values()
-			.map(|x| x.get_sprite(&self.wrapper.rigid_body_set[x.physics_handle.0]))
-	}
-
-	pub fn get_projectile_sprites(&self) -> impl Iterator<Item = ObjectSprite> + '_ {
-		self.projectiles
-			.values()
-			.map(|x| x.get_sprite(&self.wrapper.rigid_body_set[x.rigid_body]))
-	}
-}

src/shipbehavior/mod.rs

@@ -1,149 +0,0 @@
-use cgmath::{Deg, InnerSpace};
-
-use crate::{
-	content,
-	inputstatus::InputStatus,
-	physics::{util, Physics, ShipHandle},
-};
-
-pub trait ShipBehavior
-where
-	Self: Send,
-{
-	fn update_controls(
-		&mut self,
-		physics: &mut Physics,
-		input: &InputStatus,
-		content: &content::Content,
-	);
-	fn get_handle(&self) -> ShipHandle;
-}
-
-pub struct Dummy {
-	_handle: ShipHandle,
-}
-
-impl Dummy {
-	pub fn new(handle: ShipHandle) -> Box<Self> {
-		Box::new(Self { _handle: handle })
-	}
-}
-
-impl ShipBehavior for Dummy {
-	fn update_controls(
-		&mut self,
-		_physics: &mut Physics,
-		_input: &InputStatus,
-		_content: &content::Content,
-	) {
-	}
-	fn get_handle(&self) -> ShipHandle {
-		return self._handle;
-	}
-}
-
-pub struct Player {
-	handle: ShipHandle,
-}
-
-impl Player {
-	pub fn new(handle: ShipHandle) -> Box<Self> {
-		Box::new(Self { handle })
-	}
-}
-
-impl ShipBehavior for Player {
-	fn update_controls(
-		&mut self,
-		physics: &mut Physics,
-		input: &InputStatus,
-		_content: &content::Content,
-	) {
-		let s = physics.get_ship_mut(&self.handle).unwrap();
-		s.controls.left = input.key_left;
-		s.controls.right = input.key_right;
-		s.controls.guns = input.key_guns;
-		s.controls.thrust = input.key_thrust;
-	}
-
-	fn get_handle(&self) -> ShipHandle {
-		return self.handle;
-	}
-}
-
-pub struct Point {
-	handle: ShipHandle,
-}
-
-impl Point {
-	pub fn new(handle: ShipHandle) -> Box<Self> {
-		Box::new(Self { handle })
-	}
-}
-
-impl ShipBehavior for Point {
-	fn update_controls(
-		&mut self,
-		physics: &mut Physics,
-		_input: &InputStatus,
-		content: &content::Content,
-	) {
-		// Turn off all controls
-		let s = physics.get_ship_mut(&self.handle).unwrap();
-		s.controls.left = false;
-		s.controls.right = false;
-		s.controls.guns = false;
-		s.controls.thrust = false;
-
-		let (my_s, my_r) = physics.get_ship_body(&self.handle).unwrap();
-		let my_position = util::rigidbody_position(my_r);
-		let my_rotation = util::rigidbody_rotation(my_r);
-		let my_angvel = my_r.angvel();
-		let my_faction = content.get_faction(my_s.faction);
-
-		// Iterate all possible targets
-		let mut it = physics
-			.iter_ship_body()
-			.filter(|(s, _)| match my_faction.relationships[&s.faction] {
-				content::Relationship::Hostile => true,
-				_ => false,
-			})
-			.map(|(_, r)| r);
-
-		// Find the closest target
-		let mut closest_enemy_position = match it.next() {
-			Some(c) => util::rigidbody_position(c),
-			None => return, // Do nothing if no targets are available
-		};
-		let mut d = (my_position - closest_enemy_position).magnitude();
-		for r in it {
-			let p = util::rigidbody_position(r);
-			let new_d = (my_position - p).magnitude();
-			if new_d < d {
-				d = new_d;
-				closest_enemy_position = p;
-			}
-		}
-
-		let angle_delta: Deg<f32> = (my_rotation)
-			.angle(closest_enemy_position - my_position)
-			.into();
-
-		let s = physics.get_ship_mut(&self.handle).unwrap();
-		s.controls.left = false;
-		s.controls.right = false;
-
-		if angle_delta < Deg(0.0) && my_angvel > -0.3 {
-			s.controls.right = true;
-		} else if angle_delta > Deg(0.0) && my_angvel < 0.3 {
-			s.controls.left = true;
-		}
-
-		s.controls.guns = true;
-		s.controls.thrust = false;
-	}
-
-	fn get_handle(&self) -> ShipHandle {
-		return self.handle;
-	}
-}