Renames

Cargo.lock

@@ -643,10 +643,9 @@ dependencies = [
  "anyhow",
  "cgmath",
  "galactica-content",
- "galactica-galaxy",
  "galactica-playeragent",
  "galactica-render",
- "galactica-systemsim",
+ "galactica-system",
  "galactica-util",
  "pollster",
  "rand",
@@ -668,15 +667,6 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "galactica-galaxy"
-version = "0.0.0"
-dependencies = [
- "cgmath",
- "galactica-content",
- "rand",
-]
-
 [[package]]
 name = "galactica-packer"
 version = "0.0.0"
@@ -696,9 +686,9 @@ dependencies = [
  "anyhow",
  "cgmath",
  "galactica-content",
- "galactica-galaxy",
  "galactica-util",
  "pollster",
+ "rapier2d",
  "wgpu",
  "winit",
 ]
@@ -711,9 +701,8 @@ dependencies = [
  "bytemuck",
  "cgmath",
  "galactica-content",
- "galactica-galaxy",
  "galactica-packer",
- "galactica-systemsim",
+ "galactica-system",
  "galactica-util",
  "glyphon",
  "image",
@@ -723,13 +712,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "galactica-systemsim"
+name = "galactica-system"
 version = "0.0.0"
 dependencies = [
  "cgmath",
  "crossbeam",
  "galactica-content",
- "galactica-galaxy",
  "galactica-playeragent",
  "galactica-util",
  "nalgebra",

Cargo.toml

@@ -45,8 +45,7 @@ readme = ""
 galactica-util = { path = "crates/util" }
 galactica-content = { path = "crates/content" }
 galactica-render = { path = "crates/render" }
-galactica-systemsim = { path = "crates/systemsim" }
-galactica-galaxy = { path = "crates/galaxy" }
+galactica-system = { path = "crates/system" }
 galactica-packer = { path = "crates/packer" }
 galactica-playeragent = { path = "crates/playeragent" }
 galactica = { path = "crates/galactica" }

crates/content/src/part/system.rs

@@ -207,7 +207,7 @@ impl crate::Build for System {
 				});
 			}
 
-			objects.sort_by(|a, b| a.pos.z.total_cmp(&b.pos.z));
+			objects.sort_by(|a, b| b.pos.z.total_cmp(&a.pos.z));
 			content.systems.push(Self {
 				name: system_name,
 				objects,

crates/galactica/Cargo.toml

@@ -24,8 +24,7 @@ workspace = true
 galactica-content = { workspace = true }
 galactica-render = { workspace = true }
 galactica-util = { workspace = true }
-galactica-systemsim = { workspace = true }
-galactica-galaxy = { workspace = true }
+galactica-system = { workspace = true }
 galactica-playeragent = { workspace = true }
 
 rand = { workspace = true }

crates/galactica/src/game.rs

@@ -1,16 +1,17 @@
 use cgmath::Point2;
 use galactica_content::{Content, FactionHandle, OutfitHandle, ShipHandle, SystemHandle};
-use galactica_galaxy::{ship::ShipPersonality, Galaxy, GxShipHandle};
 use galactica_playeragent::PlayerAgent;
-use galactica_systemsim::{ParticleBuilder, StepResources, SystemSim, Wrapper};
+use galactica_system::data::ShipPersonality;
+use galactica_system::phys::{
+	ParticleBuilder, PhysSim, PhysSimShipHandle, PhysStepResources, Wrapper,
+};
 use galactica_util::timing::Timing;
 use rand::seq::SliceRandom;
 use std::time::Instant;
 
 #[derive(Clone)]
 pub struct GameState {
-	pub gx: Galaxy,
-	pub systemsim: SystemSim,
+	pub systemsim: PhysSim,
 	pub timing: Timing,
 	pub start_instant: Instant,
 }
@@ -37,57 +38,56 @@ pub struct Game {
 unsafe impl<'a> Send for Game {}
 
 impl<'a> Game {
-	pub fn make_player(&mut self) -> GxShipHandle {
-		let player = self.state.gx.create_ship(
+	pub fn make_player(&mut self) -> PhysSimShipHandle {
+		let player = self.state.systemsim.add_ship(
 			&self.ct,
 			ShipHandle { index: 0 },
 			FactionHandle { index: 0 },
 			ShipPersonality::Player,
-			&SystemHandle { index: 0 },
+			Point2 { x: 0.0, y: 0.0 },
 		);
-		let s = self.state.gx.get_ship_mut(player).unwrap();
-		s.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 0 }));
-		s.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 1 }));
-		s.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 2 }));
 
-		self.state
-			.systemsim
-			.add_ship(&self.ct, &s, Point2 { x: 0.0, y: 0.0 });
+		let s = self.state.systemsim.get_ship_mut(&player).unwrap();
+		s.data
+			.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 0 }));
+		s.data
+			.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 1 }));
+		s.data
+			.add_outfit(&self.ct.get_outfit(OutfitHandle { index: 2 }));
 
 		return player;
 	}
 
 	pub fn new(ct: Content) -> Self {
-		let mut gx = Galaxy::new(&ct);
+		let mut systemsim = PhysSim::new(&ct, SystemHandle { index: 0 });
 
-		let a = gx.create_ship(
+		let a = systemsim.add_ship(
 			&ct,
 			ShipHandle { index: 0 },
 			FactionHandle { index: 1 },
-			ShipPersonality::Dummy,
-			&SystemHandle { index: 0 },
+			ShipPersonality::Point,
+			Point2 { x: 100.0, y: 0.0 },
 		);
-		let s = gx.get_ship_mut(a).unwrap();
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 0 }));
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 1 }));
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 2 }));
 
-		let a = gx.create_ship(
+		let s = systemsim.get_ship_mut(&a).unwrap();
+		s.data.add_outfit(ct.get_outfit(OutfitHandle { index: 0 }));
+		s.data.add_outfit(&ct.get_outfit(OutfitHandle { index: 1 }));
+		s.data.add_outfit(&ct.get_outfit(OutfitHandle { index: 2 }));
+
+		let a = systemsim.add_ship(
 			&ct,
 			ShipHandle { index: 0 },
 			FactionHandle { index: 0 },
 			ShipPersonality::Point,
-			&SystemHandle { index: 0 },
+			Point2 { x: 0.0, y: 120.0 },
 		);
-		let s = gx.get_ship_mut(a).unwrap();
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 0 }));
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 1 }));
-		s.add_outfit(&ct.get_outfit(OutfitHandle { index: 2 }));
 
-		let systemsim = SystemSim::new(&ct, &gx, SystemHandle { index: 0 });
+		let s = systemsim.get_ship_mut(&a).unwrap();
+		s.data.add_outfit(ct.get_outfit(OutfitHandle { index: 0 }));
+		s.data.add_outfit(&ct.get_outfit(OutfitHandle { index: 1 }));
+		s.data.add_outfit(&ct.get_outfit(OutfitHandle { index: 2 }));
 
 		let state = GameState {
-			gx,
 			systemsim,
 			timing: Timing::new(),
 			start_instant: Instant::now(),
@@ -121,13 +121,8 @@ impl<'a> Game {
 		let t: f32 = self.last_update.elapsed().as_secs_f32() * self.time_scale;
 		self.new_particles.clear();
 
-		self.state.timing.start_galaxy();
-		self.state.gx.step(t);
-		self.state.timing.mark_galaxy();
-
-		self.state.systemsim.step(StepResources {
+		self.state.systemsim.step(PhysStepResources {
 			ct: &self.ct,
-			gx: &mut self.state.gx,
 			particles: &mut self.new_particles,
 			timing: &mut self.state.timing,
 			wrapper: &mut self.wrapper,

crates/galactica/src/main.rs

@@ -4,7 +4,7 @@ use anyhow::{bail, Result};
 use galactica_content::{Content, SystemHandle};
 use galactica_playeragent::{PlayerAgent, PlayerStatus};
 use galactica_render::RenderInput;
-use galactica_systemsim::util;
+use galactica_system::phys::{util, PhysSimShipHandle};
 use galactica_util::constants::ASSET_CACHE;
 use std::{
 	fs,
@@ -41,7 +41,7 @@ fn main() -> Result<()> {
 	let mut game = game::Game::new(content.clone());
 	let p = game.make_player();
 
-	let mut player = PlayerAgent::new(p);
+	let mut player = PlayerAgent::new(p.0);
 	player.set_camera_aspect(
 		gpu.window().inner_size().width as f32 / gpu.window().inner_size().height as f32,
 	);
@@ -56,8 +56,7 @@ fn main() -> Result<()> {
 					ct: &content,
 					systemsim: &game.get_state().systemsim,
 					particles: game.get_particles(),
-					player_data: player.ship.unwrap(),
-					gx: &game.get_state().gx,
+					player_ship: PhysSimShipHandle(player.ship.unwrap()),
 					current_system: SystemHandle { index: 0 },
 					timing: game.get_state().timing.clone(),
 				};
@@ -77,7 +76,10 @@ fn main() -> Result<()> {
 
 				let player_status = {
 					let pos = {
-						let o = &game.get_state().systemsim.get_ship(player.ship.unwrap());
+						let o = &game
+							.get_state()
+							.systemsim
+							.get_ship(&PhysSimShipHandle(player.ship.unwrap()));
 						if let Some(o) = o {
 							let r = &game.get_state().systemsim.get_rigid_body(o.rigid_body);
 							if let Some(r) = r {

crates/galaxy/Cargo.toml

@@ -1,23 +0,0 @@
-[package]
-name = "galactica-galaxy"
-description = "Galactica's game data manager"
-categories = { workspace = true }
-keywords = { workspace = true }
-version = { workspace = true }
-rust-version = { workspace = true }
-authors = { workspace = true }
-edition = { workspace = true }
-homepage = { workspace = true }
-repository = { workspace = true }
-license = { workspace = true }
-documentation = { workspace = true }
-readme = { workspace = true }
-
-[lints]
-workspace = true
-
-[dependencies]
-galactica-content = { workspace = true }
-
-cgmath = { workspace = true }
-rand = { workspace = true }

crates/galaxy/src/galaxy.rs

@@ -1,98 +0,0 @@
-use std::collections::HashMap;
-
-use crate::{handles::GxShipHandle, ship::GxShip, ship::ShipPersonality};
-use galactica_content::{Content, FactionHandle, ShipHandle, SystemHandle};
-
-/// Keeps track of all objects in the galaxy.
-/// This struct does NO physics, it keeps track of data exclusively.
-#[derive(Debug, Clone)]
-pub struct Galaxy {
-	/// Universal counter.
-	/// Used to create unique handles for game objects.
-	index: u64,
-
-	/// All ships in the galaxy
-	ships: HashMap<GxShipHandle, GxShip>,
-
-	/// Ships indexed by the system they're in.
-	/// A ship must always be in exactly one system.
-	system_ship_table: HashMap<SystemHandle, Vec<GxShipHandle>>,
-
-	/// Systems indexed by which ships they contain.
-	/// A ship must always be in exactly one system.
-	ship_system_table: HashMap<GxShipHandle, SystemHandle>,
-}
-
-impl Galaxy {
-	pub fn new(ct: &Content) -> Self {
-		Self {
-			system_ship_table: ct.iter_systems().map(|s| (s, Vec::new())).collect(),
-			ship_system_table: HashMap::new(),
-			index: 0,
-			ships: HashMap::new(),
-		}
-	}
-
-	/// Spawn a ship
-	pub fn create_ship(
-		&mut self,
-		ct: &Content,
-		ship: ShipHandle,
-		faction: FactionHandle,
-		personality: ShipPersonality,
-		system: &SystemHandle,
-	) -> GxShipHandle {
-		let handle = GxShipHandle {
-			index: self.index,
-			content: ship,
-		};
-		self.index += 1;
-
-		self.ships
-			.insert(handle, GxShip::new(ct, handle, ship, faction, personality));
-		self.system_ship_table.get_mut(system).unwrap().push(handle);
-		self.ship_system_table.insert(handle, *system);
-
-		return handle;
-	}
-
-	pub fn step(&mut self, t: f32) {
-		// TODO: don't allocate on step, need a better
-		// way to satisfy the borrow checker.
-		// Same needs to be done in the `systemsim` crate.
-		let mut to_remove = Vec::new();
-		for (_, s) in &mut self.ships {
-			s.step(t);
-
-			if s.is_dead() {
-				to_remove.push(s.get_handle());
-			}
-		}
-
-		// Remove dead ships
-		// No fancy animation here, that's handled by the physics system.
-		for i in to_remove {
-			let system = self.ship_system_table.remove(&i).unwrap();
-			self.system_ship_table
-				.get_mut(&system)
-				.unwrap()
-				.retain(|x| *x != i);
-			self.ships.remove(&i);
-		}
-	}
-}
-
-// Public getters
-impl Galaxy {
-	pub fn get_ship(&self, handle: GxShipHandle) -> Option<&GxShip> {
-		self.ships.get(&handle)
-	}
-
-	pub fn get_ship_mut(&mut self, handle: GxShipHandle) -> Option<&mut GxShip> {
-		self.ships.get_mut(&handle)
-	}
-
-	pub fn iter_ships(&self) -> impl Iterator<Item = &GxShip> {
-		self.ships.values()
-	}
-}

crates/galaxy/src/handles.rs

@@ -1,33 +0,0 @@
-use std::hash::Hash;
-
-use galactica_content::ShipHandle;
-
-/// A lightweight representation of a ship in the galaxy
-#[derive(Debug, Clone, Copy)]
-pub struct GxShipHandle {
-	/// This ship's unique index
-	pub(crate) index: u64,
-
-	/// This ship's content handle
-	/// (technically redundant, but this greatly simplifies code)
-	pub(crate) content: ShipHandle,
-}
-
-impl GxShipHandle {
-	pub fn content_handle(&self) -> ShipHandle {
-		self.content
-	}
-}
-
-impl Hash for GxShipHandle {
-	fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-		self.index.hash(state)
-	}
-}
-
-impl Eq for GxShipHandle {}
-impl PartialEq for GxShipHandle {
-	fn eq(&self, other: &Self) -> bool {
-		self.index.eq(&other.index)
-	}
-}

crates/galaxy/src/lib.rs

@@ -1,11 +0,0 @@
-//! This module keeps track of the galaxy state.
-//! It is also responsible for ship stats, outfits, etc.
-//!
-//! `galaxy` does not provide any simulation logic---that is done in seperate crates.
-
-mod galaxy;
-mod handles;
-pub mod ship;
-
-pub use galaxy::*;
-pub use handles::*;

crates/playeragent/Cargo.toml

@@ -19,10 +19,10 @@ workspace = true
 [dependencies]
 galactica-content = { workspace = true }
 galactica-util = { workspace = true }
-galactica-galaxy = { workspace = true }
 
 winit = { workspace = true }
 wgpu = { workspace = true }
 pollster = { workspace = true }
 anyhow = { workspace = true }
 cgmath = { workspace = true }
+rapier2d = { workspace = true }

crates/playeragent/src/playeragent.rs

@@ -1,12 +1,12 @@
 use galactica_content::Content;
-use galactica_galaxy::GxShipHandle;
+use rapier2d::geometry::ColliderHandle;
 use winit::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, VirtualKeyCode};
 
 use crate::{camera::Camera, inputstatus::InputStatus, PlayerStatus};
 
 pub struct PlayerAgent {
 	/// Which ship this player is controlling
-	pub ship: Option<GxShipHandle>,
+	pub ship: Option<ColliderHandle>,
 
 	/// This player's camera
 	pub camera: Camera,
@@ -19,7 +19,7 @@ pub struct PlayerAgent {
 }
 
 impl PlayerAgent {
-	pub fn new(ship: GxShipHandle) -> Self {
+	pub fn new(ship: ColliderHandle) -> Self {
 		Self {
 			input: InputStatus::new(),
 			camera: Camera::new(),

crates/render/Cargo.toml

@@ -20,8 +20,7 @@ workspace = true
 galactica-content = { workspace = true }
 galactica-util = { workspace = true }
 galactica-packer = { workspace = true }
-galactica-systemsim = { workspace = true }
-galactica-galaxy = { workspace = true }
+galactica-system = { workspace = true }
 
 anyhow = { workspace = true }
 cgmath = { workspace = true }

crates/render/src/datastructs.rs

@@ -1,7 +1,6 @@
 use cgmath::Point2;
 use galactica_content::{Content, SystemHandle};
-use galactica_galaxy::{Galaxy, GxShipHandle};
-use galactica_systemsim::{ParticleBuilder, SystemSim};
+use galactica_system::phys::{ParticleBuilder, PhysSim, PhysSimShipHandle};
 use galactica_util::timing::Timing;
 use glyphon::{FontSystem, SwashCache, TextAtlas, TextRenderer};
 use std::rc::Rc;
@@ -16,7 +15,7 @@ pub struct RenderInput<'a> {
 	pub camera_pos: Point2<f32>,
 
 	/// Player ship data
-	pub player_data: GxShipHandle,
+	pub player_ship: PhysSimShipHandle,
 
 	/// The system we're currently in
 	pub current_system: SystemHandle,
@@ -25,7 +24,7 @@ pub struct RenderInput<'a> {
 	pub camera_zoom: f32,
 
 	/// The world state to render
-	pub systemsim: &'a SystemSim,
+	pub systemsim: &'a PhysSim,
 
 	// TODO: handle overflow. is it a problem?
 	/// The current time, in seconds
@@ -34,9 +33,6 @@ pub struct RenderInput<'a> {
 	/// Game content
 	pub ct: &'a Content,
 
-	/// Game data
-	pub gx: &'a Galaxy,
-
 	/// Particles to spawn during this frame
 	pub particles: &'a Vec<ParticleBuilder>,
 

crates/render/src/gpustate/mod.rs

@@ -10,8 +10,8 @@ use crate::{
 /// GPUState is very big, so its methods have been split
 /// among the following files.
 mod new;
+mod phys;
 mod render;
-mod systemsim;
 
 /// A high-level GPU wrapper. Reads game state (via RenderInput),
 /// produces pretty pictures.

crates/render/src/gpustate/phys.rs

@@ -2,7 +2,7 @@
 
 use bytemuck;
 use cgmath::{EuclideanSpace, InnerSpace, Point2, Vector2};
-use galactica_systemsim::util;
+use galactica_system::phys::util;
 use galactica_util::constants::OBJECT_SPRITE_INSTANCE_LIMIT;
 
 use crate::{
@@ -12,18 +12,18 @@ use crate::{
 };
 
 impl GPUState {
-	pub(super) fn sysim_push_ship(
+	pub(super) fn phys_push_ship(
 		&mut self,
 		state: &RenderInput,
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
 	) {
-		for s in state.systemsim.iter_ships() {
-			let r = state.systemsim.get_rigid_body(s.rigid_body).unwrap();
+		for ship in state.systemsim.iter_ships() {
+			let r = state.systemsim.get_rigid_body(ship.rigid_body).unwrap();
 			let ship_pos = util::rigidbody_position(&r);
 			let ship_rot = util::rigidbody_rotation(r);
 			let ship_ang = -ship_rot.angle(Vector2 { x: 0.0, y: 1.0 }); // TODO: inconsistent angles. Fix!
-			let ship_cnt = state.ct.get_ship(s.data_handle.content_handle());
+			let ship_cnt = state.ct.get_ship(ship.data.get_content());
 
 			// Position adjusted for parallax
 			// TODO: adjust parallax for zoom?
@@ -80,16 +80,8 @@ impl GPUState {
 			);
 			self.state.vertex_buffers.object_counter += 1;
 
-			// This will be None if this ship is dead.
-			// (physics object stays around to complete the death animation)
-			// If that is the case, we're done, no flares to draw anyway!
-			let ship = match state.gx.get_ship(s.data_handle) {
-				None => continue,
-				Some(s) => s,
-			};
-
-			let flare = ship.get_outfits().get_flare_sprite(state.ct);
-			if s.get_controls().thrust && flare.is_some() {
+			let flare = ship.data.get_outfits().get_flare_sprite(state.ct);
+			if ship.get_controls().thrust && flare.is_some() && ship.data.get_state().is_flying() {
 				for engine_point in &ship_cnt.engines {
 					self.state.queue.write_buffer(
 						&self.state.global_uniform.object_buffer,
@@ -128,7 +120,7 @@ impl GPUState {
 		}
 	}
 
-	pub(super) fn sysim_push_projectile(
+	pub(super) fn phys_push_projectile(
 		&mut self,
 		state: &RenderInput,
 		// NE and SW corners of screen
@@ -198,7 +190,7 @@ impl GPUState {
 		}
 	}
 
-	pub(super) fn sysim_push_system(
+	pub(super) fn phys_push_system(
 		&mut self,
 		state: &RenderInput,
 		// NE and SW corners of screen

crates/render/src/gpustate/render.rs

@@ -116,9 +116,9 @@ impl super::GPUState {
 		// Order matters, it determines what is drawn on top.
 		// The order inside ships and projectiles doesn't matter,
 		// but ships should always be under projectiles.
-		self.sysim_push_system(&input, (clip_ne, clip_sw));
-		self.sysim_push_ship(&input, (clip_ne, clip_sw));
-		self.sysim_push_projectile(&input, (clip_ne, clip_sw));
+		self.phys_push_system(&input, (clip_ne, clip_sw));
+		self.phys_push_ship(&input, (clip_ne, clip_sw));
+		self.phys_push_projectile(&input, (clip_ne, clip_sw));
 		self.ui.draw(&input, &mut self.state);
 
 		// These should match the indices in each shader,

crates/render/src/ui/fpsindicator.rs

@@ -36,9 +36,9 @@ impl FpsIndicator {
 		self.buffer.set_text(
 			&mut state.text_font_system,
 			&format!(
-				"Frame:  {:#?} ({:05.00})\nGame:   {:05.02}%\nShips:  {:05.02}%\nPhys:   {:05.02}%\n",
-				input.timing.frame, 1.0 /input.timing.frame.as_secs_f32(),
-				100.0 * (input.timing.galaxy.as_secs_f32() / input.timing.frame.as_secs_f32()),
+				"Frame:  {:#?} ({:05.00})\nShips:  {:05.02}%\nPhys:   {:05.02}%\n",
+				input.timing.frame,
+				1.0 / input.timing.frame.as_secs_f32(),
 				100.0 * (input.timing.physics_sim.as_secs_f32() / input.timing.frame.as_secs_f32()),
 				100.0
 					* (input.timing.physics_ship.as_secs_f32() / input.timing.frame.as_secs_f32()),

crates/render/src/ui/radar.rs

@@ -1,5 +1,5 @@
 use cgmath::{Deg, InnerSpace, Point2, Rad, Vector2};
-use galactica_systemsim::util;
+use galactica_system::{data::ShipState, phys::util};
 use galactica_util::constants::UI_SPRITE_INSTANCE_LIMIT;
 
 use crate::{
@@ -31,13 +31,17 @@ impl Radar {
 
 		// TODO: maybe a cleaner solution for last posititon?
 		// This is necessary because the player may be dead or landed
-		if let Some(player_world_object) = input.systemsim.get_ship(input.player_data) {
+		let player_ship = input.systemsim.get_ship(&input.player_ship).unwrap();
+
+		match player_ship.data.get_state() {
+			ShipState::Flying | ShipState::Collapsing { .. } => {
 				let player_body = input
 					.systemsim
-				.get_rigid_body(player_world_object.rigid_body)
+					.get_rigid_body(player_ship.rigid_body)
 					.unwrap();
 
 				self.last_player_position = util::rigidbody_position(player_body)
+			}
 		};
 
 		let planet_sprite = input.ct.get_sprite_handle("ui::planetblip");
@@ -115,17 +119,17 @@ impl Radar {
 		for (s, r) in input.systemsim.iter_ship_body() {
 			// This will be None if this ship is dead.
 			// Stays around while the physics system runs a collapse sequence
-			let color = match input.gx.get_ship(s.data_handle) {
-				None => {
+			let color = match s.data.get_state() {
+				ShipState::Collapsing { .. } => {
 					// TODO: configurable
 					[0.2, 0.2, 0.2, 1.0]
 				}
-				Some(data) => {
-					let c = input.ct.get_faction(data.get_faction()).color;
+				ShipState::Flying => {
+					let c = input.ct.get_faction(s.data.get_faction()).color;
 					[c[0], c[1], c[2], 1.0]
 				}
 			};
-			let ship = input.ct.get_ship(s.data_handle.content_handle());
+			let ship = input.ct.get_ship(s.data.get_content());
 			let size = (ship.size * ship.sprite.aspect) * ship_scale;
 			let p = util::rigidbody_position(r);
 			let d = (p - self.last_player_position) / radar_range;

crates/render/src/ui/status.rs

@@ -1,5 +1,6 @@
 use std::f32::consts::TAU;
 
+use galactica_system::data::ShipState;
 use galactica_util::constants::{RADIALBAR_SPRITE_INSTANCE_LIMIT, UI_SPRITE_INSTANCE_LIMIT};
 
 use crate::{
@@ -29,19 +30,16 @@ impl Status {
 		let current_shields;
 		let current_hull;
 		let max_hull;
-		if let Some(player_world_object) = input.systemsim.get_ship(input.player_data) {
-			let data = input.gx.get_ship(player_world_object.data_handle).unwrap();
-			max_shields = data.get_outfits().get_shield_strength();
-			current_shields = data.get_shields();
-			current_hull = data.get_hull();
-			max_hull = input.ct.get_ship(data.get_content()).hull;
-		} else {
-			// Sensible defaults if ship doesn't exist (landed or dead)
-			max_shields = 1.0;
-			current_shields = 0.0;
-			current_hull = 0.0;
-			max_hull = 1.0;
-		};
+		let player_ship = input.systemsim.get_ship(&input.player_ship).unwrap();
+
+		match player_ship.data.get_state() {
+			ShipState::Collapsing { .. } | ShipState::Flying => {
+				max_shields = player_ship.data.get_outfits().get_shield_strength();
+				current_shields = player_ship.data.get_shields();
+				current_hull = player_ship.data.get_hull();
+				max_hull = input.ct.get_ship(player_ship.data.get_content()).hull;
+			}
+		}
 
 		state.queue.write_buffer(
 			&state.vertex_buffers.ui.instances,

crates/system/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
-name = "galactica-systemsim"
-description = "Physics interactions for Galactica"
+name = "galactica-system"
+description = "Galactica's star system simulations"
 categories = { workspace = true }
 keywords = { workspace = true }
 version = { workspace = true }
@@ -18,7 +18,6 @@ workspace = true
 
 [dependencies]
 galactica-content = { workspace = true }
-galactica-galaxy = { workspace = true }
 galactica-util = { workspace = true }
 galactica-playeragent = { workspace = true }
 

crates/system/src/data/mod.rs

@@ -0,0 +1,4 @@
+//! This module contains data structs shared between all simulations
+
+mod ship;
+pub use ship::*;

crates/system/src/data/ship/outfitset.rs

@@ -160,6 +160,8 @@ impl OutfitSet {
 	}
 
 	// TODO: pick these better
+	/// Returns the flare sprite that should be shown when this
+	/// ship is using its thrusters
 	pub fn get_flare_sprite(&self, ct: &Content) -> Option<SpriteHandle> {
 		for i in self.outfits.keys() {
 			let c = ct.get_outfit(*i);

crates/system/src/data/ship/ship.rs

@@ -1,21 +1,81 @@
 use std::{collections::HashMap, time::Instant};
 
-use crate::GxShipHandle;
-
 use super::{OutfitSet, ShipPersonality};
 use galactica_content::{Content, FactionHandle, GunPoint, Outfit, ShipHandle};
 use rand::{rngs::ThreadRng, Rng};
 
+/// Ship state machine.
+/// Any ship we keep track of is in one of these states.
+/// Dead ships don't exist---they removed once their collapse
+/// sequence fully plays out.
 #[derive(Debug, Clone)]
-pub struct GxShip {
+pub enum ShipState {
+	/// This ship is alive and well in open space
+	Flying, // TODO: system, position (also in collapse)?
+
+	/// This ship has been destroyed, and is playing its collapse sequence.
+	Collapsing {
+		/// Total collapse sequence length, in seconds
+		total: f32,
+
+		/// How many seconds of the collapse sequence we've played
+		elapsed: f32,
+	},
+}
+
+impl ShipState {
+	/// True if this ship has been destroyed and has finished it's collapse sequence.
+	/// Ships are deleted once this is true.
+	pub fn should_be_removed(&self) -> bool {
+		match self {
+			Self::Collapsing { elapsed, total } => elapsed >= total,
+			_ => false,
+		}
+	}
+
+	/// Is this ship playing its collapse sequence?
+	pub fn is_collapsing(&self) -> bool {
+		match self {
+			Self::Collapsing { .. } => true,
+			_ => false,
+		}
+	}
+
+	/// If this ship is collapsing, return total collapse time and remaining collapse time.
+	/// Otherwise, return None
+	pub fn collapse_state(&self) -> Option<(f32, f32)> {
+		match self {
+			Self::Collapsing {
+				total,
+				elapsed: remaining,
+			} => Some((*total, *remaining)),
+			_ => None,
+		}
+	}
+
+	/// Is this ship flying in open space?
+	pub fn is_flying(&self) -> bool {
+		match self {
+			Self::Flying => true,
+			_ => false,
+		}
+	}
+}
+
+/// Represents all attributes of a single ship
+#[derive(Debug, Clone)]
+pub struct ShipData {
 	// Metadata values
-	handle: GxShipHandle,
 	ct_handle: ShipHandle,
 	faction: FactionHandle,
 	outfits: OutfitSet,
 
 	personality: ShipPersonality,
 
+	/// Ship state machine. Keeps track of all possible ship state.
+	/// TODO: document this, draw a graph
+	state: ShipState,
+
 	// State values
 	// TODO: unified ship stats struct, like outfit space
 	hull: f32,
@@ -28,17 +88,16 @@ pub struct GxShip {
 	last_hit: Instant,
 }
 
-impl GxShip {
+impl ShipData {
+	/// Create a new ShipData
 	pub(crate) fn new(
 		ct: &Content,
-		handle: GxShipHandle,
 		ct_handle: ShipHandle,
 		faction: FactionHandle,
 		personality: ShipPersonality,
 	) -> Self {
 		let s = ct.get_ship(ct_handle);
-		GxShip {
-			handle,
+		ShipData {
 			ct_handle,
 			faction,
 			outfits: OutfitSet::new(s.space, &s.guns),
@@ -46,6 +105,9 @@ impl GxShip {
 			last_hit: Instant::now(),
 			rng: rand::thread_rng(),
 
+			// TODO: ships must always start landed on planets
+			state: ShipState::Flying,
+
 			// Initial stats
 			hull: s.hull,
 			shields: 0.0,
@@ -65,16 +127,11 @@ impl GxShip {
 		self.outfits.remove(o)
 	}
 
-	/// If this ship is dead, it will be removed from the game.
-	pub fn is_dead(&self) -> bool {
-		self.hull <= 0.0
-	}
-
 	/// Try to fire a gun.
 	/// Will panic if `which` isn't a point on this ship.
 	/// Returns `true` if this gun was fired,
 	/// and `false` if it is on cooldown or empty.
-	pub fn fire_gun(&mut self, ct: &Content, which: &GunPoint) -> bool {
+	pub(crate) fn fire_gun(&mut self, ct: &Content, which: &GunPoint) -> bool {
 		let c = self.gun_cooldowns.get_mut(which).unwrap();
 
 		if *c > 0.0 {
@@ -93,8 +150,8 @@ impl GxShip {
 	}
 
 	/// Hit this ship with the given amount of damage
-	pub fn apply_damage(&mut self, mut d: f32) {
-		if self.is_dead() {
+	pub(crate) fn apply_damage(&mut self, ct: &Content, mut d: f32) {
+		if self.state.is_collapsing() {
 			return;
 		}
 		if self.shields >= d {
@@ -105,10 +162,26 @@ impl GxShip {
 			self.hull = 0f32.max(self.hull - d);
 		}
 		self.last_hit = Instant::now();
+
+		if self.hull <= 0.0 {
+			// This ship has been destroyed, update state
+			self.state = ShipState::Collapsing {
+				total: ct.get_ship(self.ct_handle).collapse.length,
+				elapsed: 0.0,
+			}
+		}
 	}
 
 	/// Update this ship's state by `t` seconds
-	pub fn step(&mut self, t: f32) {
+	pub(crate) fn step(&mut self, t: f32) {
+		match self.state {
+			ShipState::Collapsing {
+				ref mut elapsed, ..
+			} => {
+				*elapsed += t;
+			}
+
+			ShipState::Flying => {
 				// Cooldown guns
 				for (_, c) in &mut self.gun_cooldowns {
 					if *c > 0.0 {
@@ -130,13 +203,15 @@ impl GxShip {
 					}
 				}
 			}
+		}
+	}
 }
 
 // Misc getters, so internal state is untouchable
-impl GxShip {
-	/// Get a handle to this ship game object
-	pub fn get_handle(&self) -> GxShipHandle {
-		self.handle
+impl ShipData {
+	/// Get this ship's state
+	pub fn get_state(&self) -> &ShipState {
+		&self.state
 	}
 
 	/// Get a handle to this ship's content

crates/system/src/lib.rs

@@ -0,0 +1,8 @@
+#![warn(missing_docs)]
+
+//! Galactica's system simulation.
+//! data contains shared object data,
+//! phys contains the physics system simulation (the one you see)
+
+pub mod data;
+pub mod phys;

crates/system/src/phys/controller/mod.rs

@@ -6,13 +6,12 @@ mod point;
 use null::*;
 use point::PointShipController;
 
-use galactica_galaxy::GxShipHandle;
-use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
+use rapier2d::{dynamics::RigidBodySet, geometry::ColliderHandle};
 use std::{collections::HashMap, fmt::Debug};
 
-use crate::{
-	objects::{ShipControls, SySimShip},
-	StepResources,
+use super::{
+	objects::{PhysSimShip, ShipControls},
+	PhysStepResources,
 };
 
 /// Represents a ship controller
@@ -39,15 +38,14 @@ impl ShipController {
 	/// Compute new ship controls from world state
 	pub fn update_controls(
 		&mut self,
-		res: &StepResources,
+		res: &PhysStepResources,
 		rigid_bodies: &RigidBodySet,
-		ships: &HashMap<GxShipHandle, SySimShip>,
-		this_ship: RigidBodyHandle,
-		this_data: GxShipHandle,
+		ships: &HashMap<ColliderHandle, PhysSimShip>,
+		this_ship: ColliderHandle,
 	) -> Option<ShipControls> {
 		match self {
-			Self::Null(n) => n.update_controls(res, rigid_bodies, ships, this_ship, this_data),
-			Self::Point(p) => p.update_controls(res, rigid_bodies, ships, this_ship, this_data),
+			Self::Null(n) => n.update_controls(res, rigid_bodies, ships, this_ship),
+			Self::Point(p) => p.update_controls(res, rigid_bodies, ships, this_ship),
 		}
 	}
 }
@@ -63,10 +61,9 @@ where
 	/// or None if no change is to be made.
 	fn update_controls(
 		&mut self,
-		res: &StepResources,
+		res: &PhysStepResources,
 		rigid_bodies: &RigidBodySet,
-		ships: &HashMap<GxShipHandle, SySimShip>,
-		this_ship: RigidBodyHandle,
-		this_data: GxShipHandle,
+		ships: &HashMap<ColliderHandle, PhysSimShip>,
+		this_ship: ColliderHandle,
 	) -> Option<ShipControls>;
 }

crates/system/src/phys/controller/null.rs

@@ -1,11 +1,12 @@
-use galactica_galaxy::GxShipHandle;
-use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
+use rapier2d::{dynamics::RigidBodySet, geometry::ColliderHandle};
 use std::collections::HashMap;
 
-use super::ShipControllerStruct;
-use crate::{
-	objects::{ShipControls, SySimShip},
-	StepResources,
+use super::{
+	super::{
+		objects::{PhysSimShip, ShipControls},
+		PhysStepResources,
+	},
+	ShipControllerStruct,
 };
 
 /// The Null controller is assigned to objects that are static or not controlled by the computer.
@@ -23,11 +24,10 @@ impl NullShipController {
 impl ShipControllerStruct for NullShipController {
 	fn update_controls(
 		&mut self,
-		_res: &StepResources,
+		_res: &PhysStepResources,
 		_rigid_bodies: &RigidBodySet,
-		_ships: &HashMap<GxShipHandle, SySimShip>,
-		_this_ship: RigidBodyHandle,
-		_this_data: GxShipHandle,
+		_ships: &HashMap<ColliderHandle, PhysSimShip>,
+		_this_ship: ColliderHandle,
 	) -> Option<ShipControls> {
 		None
 	}

crates/system/src/phys/controller/point.rs

@@ -1,13 +1,14 @@
 use cgmath::{Deg, InnerSpace};
 use galactica_content::Relationship;
-use galactica_galaxy::GxShipHandle;
-use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
+use rapier2d::{dynamics::RigidBodySet, geometry::ColliderHandle};
 use std::collections::HashMap;
 
-use super::ShipControllerStruct;
-use crate::{
-	objects::{ShipControls, SySimShip},
-	util, StepResources,
+use super::{
+	super::{
+		objects::{PhysSimShip, ShipControls},
+		util, PhysStepResources,
+	},
+	ShipControllerStruct,
 };
 
 /// "Point" ship controller.
@@ -25,37 +26,30 @@ impl PointShipController {
 impl ShipControllerStruct for PointShipController {
 	fn update_controls(
 		&mut self,
-		res: &StepResources,
+		res: &PhysStepResources,
 		rigid_bodies: &RigidBodySet,
-		ships: &HashMap<GxShipHandle, SySimShip>,
-		this_ship: RigidBodyHandle,
-		this_data: GxShipHandle,
+		ships: &HashMap<ColliderHandle, PhysSimShip>,
+		this_ship: ColliderHandle,
 	) -> Option<ShipControls> {
 		let mut controls = ShipControls::new();
 
-		let this_rigidbody = rigid_bodies.get(this_ship).unwrap();
-		let my_data = res.gx.get_ship(this_data).unwrap();
+		let my_ship = ships.get(&this_ship).unwrap();
+		let this_rigidbody = rigid_bodies.get(my_ship.rigid_body).unwrap();
 		let my_position = util::rigidbody_position(this_rigidbody);
 		let my_rotation = util::rigidbody_rotation(this_rigidbody);
 		let my_angvel = this_rigidbody.angvel();
-		let my_faction = res.ct.get_faction(my_data.get_faction());
+		let my_faction = res.ct.get_faction(my_ship.data.get_faction());
 
 		// Iterate all possible targets
 		let mut hostile_ships = ships
 			.values()
-			.filter(|s| {
-				let data = res.gx.get_ship(s.data_handle);
-				if let Some(data) = data {
-					match my_faction.relationships.get(&data.get_faction()).unwrap() {
-						Relationship::Hostile => true,
+			.filter(
+				// Target only flying ships we're hostile towards
+				|s| match my_faction.relationships.get(&s.data.get_faction()).unwrap() {
+					Relationship::Hostile => s.data.get_state().is_flying(),
 					_ => false,
-					}
-				} else {
-					// This check is necessary---we don't want to target (or panic on)
-					// ships that don't have data (and are thus playing their collapse animation)
-					false
-				}
-			})
+				},
+			)
 			.map(|s| rigid_bodies.get(s.rigid_body).unwrap());
 
 		// Find the closest target

crates/system/src/phys/mod.rs

@@ -1,6 +1,4 @@
-#![warn(missing_docs)]
-
-//! This module provides a physics-based simulation of one galaxy system.
+//! This module provides a physics-based simulation of one system.
 
 pub mod controller;
 pub mod objects;
@@ -12,5 +10,5 @@ mod wrapper;
 
 pub use particlebuilder::*;
 pub use stepresources::*;
-pub use systemsim::SystemSim;
+pub use systemsim::{PhysSim, PhysSimShipHandle};
 pub use wrapper::Wrapper;

crates/system/src/phys/objects/collapse.rs

@@ -1,41 +1,37 @@
 use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Rad, Vector2, Zero};
-use galactica_content::{CollapseEvent, Ship, ShipHandle};
+use galactica_content::{CollapseEvent, Ship};
 use nalgebra::point;
 use rand::{rngs::ThreadRng, Rng};
 use rapier2d::{dynamics::RigidBody, geometry::Collider};
 
-use crate::{util, ParticleBuilder, StepResources};
+use super::super::{util, ParticleBuilder, PhysStepResources};
+use crate::data::ShipData;
 
 #[derive(Debug, Clone)]
 pub(super) struct ShipCollapseSequence {
-	total_length: f32,
-	time_elapsed: f32,
 	rng: ThreadRng,
+
+	/// The elapsed collapse duration when step()
+	/// was last called
+	last_call: f32,
 }
 
 impl ShipCollapseSequence {
-	pub(super) fn new(total_length: f32) -> Self {
+	pub(super) fn new() -> Self {
 		Self {
-			total_length,
-			time_elapsed: 0.0,
 			rng: rand::thread_rng(),
+			last_call: 0.0,
 		}
 	}
 
-	/// Has this sequence been fully played out?
-	pub(super) fn is_done(&self) -> bool {
-		self.time_elapsed >= self.total_length
-	}
-
 	/// Pick a random points inside a ship's collider
-	fn random_in_ship(&mut self, ship_content: &Ship, collider: &Collider) -> Vector2<f32> {
+	fn random_in_ship(&mut self, ship: &Ship, collider: &Collider) -> Vector2<f32> {
 		let mut y = 0.0;
 		let mut x = 0.0;
 		let mut a = false;
 		while !a {
-			y = self.rng.gen_range(-1.0..=1.0) * ship_content.size / 2.0;
-			x = self.rng.gen_range(-1.0..=1.0) * ship_content.size * ship_content.sprite.aspect
-				/ 2.0;
+			y = self.rng.gen_range(-1.0..=1.0) * ship.size / 2.0;
+			x = self.rng.gen_range(-1.0..=1.0) * ship.size * ship.sprite.aspect / 2.0;
 			a = collider.shape().contains_local_point(&point![x, y]);
 		}
 		Vector2 { x, y }
@@ -44,25 +40,32 @@ impl ShipCollapseSequence {
 	/// Step this sequence `t` seconds
 	pub(super) fn step(
 		&mut self,
-		res: &mut StepResources,
-		ship_handle: ShipHandle,
+		res: &mut PhysStepResources,
+		ship_data: &ShipData,
 		rigid_body: &mut RigidBody,
 		collider: &mut Collider,
 	) {
-		let ship_content = res.ct.get_ship(ship_handle);
+		let ship_content = res.ct.get_ship(ship_data.get_content());
 		let ship_pos = util::rigidbody_position(rigid_body);
 		let ship_rot = util::rigidbody_rotation(rigid_body);
 		let ship_ang = ship_rot.angle(Vector2 { x: 1.0, y: 0.0 });
 
+		let (total, elapsed) = ship_data.get_state().collapse_state().unwrap();
+		// How much time has passed since step() was last called
+		let delta = elapsed - self.last_call;
+
 		// The fraction of this collapse sequence that has been played
-		let frac_done = self.time_elapsed / self.total_length;
+		let frac_done = elapsed / total;
+
+		// TODO: slight random offset for event particles
 
 		// Trigger collapse events
 		for event in &ship_content.collapse.events {
 			match event {
 				CollapseEvent::Effect(event) => {
-					if (event.time > self.time_elapsed && event.time <= self.time_elapsed + res.t)
-						|| (event.time == 0.0 && self.time_elapsed == 0.0)
+					if (event.time > self.last_call && event.time <= elapsed)
+						|| (event.time == 0.0 && self.last_call == 0.0)
+					// ^^ Don't miss events scheduled at the very start of the sequence!
 					{
 						for spawner in &event.effects {
 							let effect = res.ct.get_effect(spawner.effect);
@@ -112,7 +115,9 @@ impl ShipCollapseSequence {
 				return y;
 			};
 
-			let p_add = (res.t / self.total_length) * pdf(frac_done) * spawner.count;
+			// Notice that we don't use res.t here, since ship state is updated earlier
+			// ( through self.data.step() )
+			let p_add = (delta / total) * pdf(frac_done) * spawner.count;
 
 			if self.rng.gen_range(0.0..=1.0) <= p_add {
 				let pos = if let Some(pos) = spawner.pos {
@@ -138,6 +143,6 @@ impl ShipCollapseSequence {
 			}
 		}
 
-		self.time_elapsed += res.t;
+		self.last_call = elapsed;
 	}
 }

crates/system/src/phys/objects/mod.rs

@@ -3,5 +3,5 @@ mod collapse;
 mod projectile;
 mod ship;
 
-pub use projectile::SySimProjectile;
-pub use ship::{ShipControls, SySimShip};
+pub use projectile::PhysProjectile;
+pub use ship::{PhysSimShip, ShipControls};

crates/system/src/phys/objects/projectile.rs

@@ -2,9 +2,9 @@ use galactica_content::{FactionHandle, Projectile};
 use rand::Rng;
 use rapier2d::{dynamics::RigidBodyHandle, geometry::ColliderHandle};
 
-/// A single projectile in this sim
+/// A single projectile in this simulation
 #[derive(Debug, Clone)]
-pub struct SySimProjectile {
+pub struct PhysProjectile {
 	/// This projectile's game data
 	pub content: Projectile,
 
@@ -24,7 +24,7 @@ pub struct SySimProjectile {
 	pub size_rng: f32,
 }
 
-impl SySimProjectile {
+impl PhysProjectile {
 	/// Create a new projectile
 	pub fn new(
 		content: Projectile, // TODO: use a handle
@@ -35,7 +35,7 @@ impl SySimProjectile {
 		let mut rng = rand::thread_rng();
 		let size_rng = content.size_rng;
 		let lifetime = content.lifetime;
-		SySimProjectile {
+		PhysProjectile {
 			rigid_body,
 			collider,
 			content,

crates/system/src/phys/objects/ship.rs

@@ -1,6 +1,5 @@
 use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Rad, Vector2, Zero};
-use galactica_content::{Content, FactionHandle};
-use galactica_galaxy::GxShipHandle;
+use galactica_content::{Content, FactionHandle, ShipHandle};
 use nalgebra::{point, vector};
 use rand::Rng;
 use rapier2d::{
@@ -8,9 +7,12 @@ use rapier2d::{
 	geometry::{Collider, ColliderHandle},
 };
 
-use crate::{util, ParticleBuilder, StepResources};
+use crate::data::{ShipData, ShipPersonality, ShipState};
 
-use super::collapse::ShipCollapseSequence;
+use super::{
+	super::{util, ParticleBuilder, PhysStepResources},
+	collapse::ShipCollapseSequence,
+};
 
 /// A ship's controls
 #[derive(Debug, Clone)]
@@ -42,7 +44,7 @@ impl ShipControls {
 
 /// A ship instance in the physics system
 #[derive(Debug, Clone)]
-pub struct SySimShip {
+pub struct PhysSimShip {
 	/// This ship's physics handle
 	pub rigid_body: RigidBodyHandle,
 
@@ -50,83 +52,70 @@ pub struct SySimShip {
 	pub collider: ColliderHandle,
 
 	/// This ship's game data
-	pub data_handle: GxShipHandle,
+	pub data: ShipData,
 
 	/// This ship's controls
 	pub(crate) controls: ShipControls,
 
 	/// This ship's collapse sequence
-	collapse_sequence: ShipCollapseSequence,
-
-	/// This ship's faction.
-	/// This is technically redundant, faction is also stored in
-	/// game data, but that's destroyed once the ship dies.
-	/// We need the faction for the collapse sequence!
-	faction: FactionHandle,
+	collapse_sequence: Option<ShipCollapseSequence>,
 }
 
-impl SySimShip {
+impl PhysSimShip {
 	/// Make a new ship
 	pub(crate) fn new(
 		ct: &Content,
-		data_handle: GxShipHandle,
+		handle: ShipHandle,
+		personality: ShipPersonality,
 		faction: FactionHandle,
 		rigid_body: RigidBodyHandle,
 		collider: ColliderHandle,
 	) -> Self {
-		let ship_content = ct.get_ship(data_handle.content_handle());
-		SySimShip {
+		PhysSimShip {
 			rigid_body,
 			collider,
-			data_handle,
+			data: ShipData::new(ct, handle, faction, personality),
 			controls: ShipControls::new(),
-			faction,
-			collapse_sequence: ShipCollapseSequence::new(ship_content.collapse.length),
+			collapse_sequence: Some(ShipCollapseSequence::new()),
 		}
 	}
 
-	/// If this is true, remove this ship from the physics system.
-	pub fn should_be_removed(&self) -> bool {
-		self.collapse_sequence.is_done()
-	}
-
 	/// Step this ship's state by t seconds
 	pub fn step(
 		&mut self,
-		res: &mut StepResources,
+		res: &mut PhysStepResources,
 		rigid_body: &mut RigidBody,
 		collider: &mut Collider,
 	) {
-		let ship_data = res.gx.get_ship(self.data_handle);
-		if ship_data.is_none() {
-			// If ship data is none, it has been removed because the ship has been destroyed.
-			// play collapse sequence.
-			self.collapse_sequence.step(
-				res,
-				self.data_handle.content_handle(),
-				rigid_body,
-				collider,
-			);
-		} else {
+		self.data.step(res.t);
+		match self.data.get_state() {
+			ShipState::Collapsing { .. } => {
+				// Borrow checker hack, so we may pass self.data
+				// to the collapse sequence
+				let mut seq = self.collapse_sequence.take().unwrap();
+				seq.step(res, &self.data, rigid_body, collider);
+				self.collapse_sequence = Some(seq);
+			}
+			ShipState::Flying => {
 				return self.step_live(res, rigid_body, collider);
 			}
 		}
+	}
 
 	/// Step this ship's state by t seconds (called when alive)
 	fn step_live(
 		&mut self,
-		res: &mut StepResources,
+		res: &mut PhysStepResources,
 		rigid_body: &mut RigidBody,
 		collider: &mut Collider,
 	) {
-		let ship = res.gx.get_ship(self.data_handle).unwrap();
-		let ship_content = res.ct.get_ship(self.data_handle.content_handle());
+		let ship_content = res.ct.get_ship(self.data.get_content());
 		let ship_pos = util::rigidbody_position(&rigid_body);
 		let ship_rot = util::rigidbody_rotation(rigid_body);
 		let ship_ang = ship_rot.angle(Vector2 { x: 1.0, y: 0.0 });
 		let mut rng = rand::thread_rng();
 
-		if ship.get_hull() <= ship_content.damage.hull {
+		if self.data.get_hull() <= ship_content.damage.hull {
 			for e in &ship_content.damage.effects {
 				if rng.gen_range(0.0..=1.0) <= res.t / e.frequency {
 					let effect = res.ct.get_effect(e.effect);
@@ -171,31 +160,31 @@ impl SySimShip {
 
 		if self.controls.thrust {
 			rigid_body.apply_impulse(
-				vector![engine_force.x, engine_force.y] * ship.get_outfits().get_engine_thrust(),
+				vector![engine_force.x, engine_force.y]
+					* self.data.get_outfits().get_engine_thrust(),
 				true,
 			);
 		}
 
 		if self.controls.right {
-			rigid_body
-				.apply_torque_impulse(ship.get_outfits().get_steer_power() * -100.0 * res.t, true);
+			rigid_body.apply_torque_impulse(
+				self.data.get_outfits().get_steer_power() * -100.0 * res.t,
+				true,
+			);
 		}
 
 		if self.controls.left {
-			rigid_body
-				.apply_torque_impulse(ship.get_outfits().get_steer_power() * 100.0 * res.t, true);
+			rigid_body.apply_torque_impulse(
+				self.data.get_outfits().get_steer_power() * 100.0 * res.t,
+				true,
+			);
 		}
 	}
 }
 
-impl SySimShip {
+impl PhysSimShip {
 	/// Get this ship's control state
 	pub fn get_controls(&self) -> &ShipControls {
 		&self.controls
 	}
-
-	/// Get this ship's faction
-	pub fn get_faction(&self) -> FactionHandle {
-		self.faction
-	}
 }

crates/system/src/phys/stepresources.rs

@@ -1,16 +1,12 @@
-use crate::{wrapper::Wrapper, ParticleBuilder};
+use super::{wrapper::Wrapper, ParticleBuilder};
 use galactica_content::Content;
-use galactica_galaxy::Galaxy;
 use galactica_util::timing::Timing;
 
 /// External resources we need to compute time steps
-pub struct StepResources<'a> {
+pub struct PhysStepResources<'a> {
 	/// Game content
 	pub ct: &'a Content,
 
-	/// Game data
-	pub gx: &'a mut Galaxy,
-
 	/// Length of time step
 	pub t: f32,
 

crates/system/src/phys/systemsim.rs

@@ -1,10 +1,7 @@
 use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Point2, Rad, Vector2, Zero};
 use galactica_content::{
-	Content, GunPoint, OutfitHandle, ProjectileCollider, Relationship, SystemHandle,
-};
-use galactica_galaxy::{
-	ship::{GxShip, ShipPersonality},
-	Galaxy, GxShipHandle,
+	Content, FactionHandle, GunPoint, OutfitHandle, ProjectileCollider, Relationship, ShipHandle,
+	SystemHandle,
 };
 use galactica_playeragent::PlayerAgent;
 use nalgebra::{point, vector};
@@ -16,36 +13,41 @@ use rapier2d::{
 };
 use std::{collections::HashMap, f32::consts::PI};
 
-use crate::{
+use crate::data::ShipPersonality;
+
+use super::{
 	controller::ShipController,
-	objects::{SySimProjectile, SySimShip},
-	util, ParticleBuilder, StepResources,
+	objects::{PhysProjectile, PhysSimShip},
+	util, ParticleBuilder, PhysStepResources,
 };
 
+// TODO: replace with a more generic handle
+/// A handle for a ship in this simulation
+/// This lets other crates reference ships
+/// without including `rapier2d`.
+pub struct PhysSimShipHandle(pub ColliderHandle);
+
 /// Manages the physics state of one system
 #[derive(Clone)]
-pub struct SystemSim {
+pub struct PhysSim {
 	/// The system this sim is attached to
 	_system: SystemHandle,
 
 	rigid_body_set: RigidBodySet,
 	collider_set: ColliderSet,
 
-	projectiles: HashMap<ColliderHandle, SySimProjectile>,
-	ships: HashMap<GxShipHandle, SySimShip>,
-
-	// TODO: these don't need to be cloned each frame
-	ship_behaviors: HashMap<GxShipHandle, ShipController>,
-	collider_ship_table: HashMap<ColliderHandle, GxShipHandle>,
+	projectiles: HashMap<ColliderHandle, PhysProjectile>,
+	ships: HashMap<ColliderHandle, PhysSimShip>,
+	ship_behaviors: HashMap<ColliderHandle, ShipController>,
 }
 
 // Private methods
-impl<'a> SystemSim {
+impl<'a> PhysSim {
 	fn remove_projectile(
 		&mut self,
-		res: &mut StepResources,
+		res: &mut PhysStepResources,
 		c: ColliderHandle,
-	) -> Option<(RigidBody, SySimProjectile)> {
+	) -> Option<(RigidBody, PhysProjectile)> {
 		let p = match self.projectiles.remove(&c) {
 			Some(p) => p,
 			None => return None,
@@ -65,38 +67,32 @@ impl<'a> SystemSim {
 		return Some((r, p));
 	}
 
-	fn remove_ship(&mut self, res: &mut StepResources, s: ColliderHandle) {
-		let s = match self.collider_ship_table.get(&s) {
-			None => return,
-			Some(s) => match self.ships.get(s) {
+	fn remove_ship(&mut self, res: &mut PhysStepResources, colliderhandle: ColliderHandle) {
+		let ship = match self.ships.get(&colliderhandle) {
 			None => return,
 			Some(s) => s,
-			},
 		};
 
 		self.rigid_body_set.remove(
-			s.rigid_body,
+			ship.rigid_body,
 			&mut res.wrapper.im,
 			&mut self.collider_set,
 			&mut res.wrapper.ij,
 			&mut res.wrapper.mj,
 			true,
 		);
-		let h = self.collider_ship_table.remove(&s.collider).unwrap();
-		self.ship_behaviors.remove(&h);
-		self.ships.remove(&h);
+		self.ships.remove(&colliderhandle).unwrap();
+		self.ship_behaviors.remove(&colliderhandle);
 	}
 
 	fn collide_projectile_ship(
 		&mut self,
-		res: &mut StepResources,
+		res: &mut PhysStepResources,
 		projectile_h: ColliderHandle,
 		ship_h: ColliderHandle,
 	) {
 		let projectile = self.projectiles.get(&projectile_h);
-		let ship = self
-			.ships
-			.get_mut(self.collider_ship_table.get(&ship_h).unwrap());
+		let ship = self.ships.get_mut(&ship_h);
 		if projectile.is_none() || ship.is_none() {
 			return;
 		}
@@ -104,13 +100,10 @@ impl<'a> SystemSim {
 		let ship = ship.unwrap();
 
 		let f = res.ct.get_faction(projectile.faction);
-		let r = f.relationships.get(&ship.get_faction()).unwrap();
+		let r = f.relationships.get(&ship.data.get_faction()).unwrap();
 		let destory_projectile = match r {
 			Relationship::Hostile => {
-				// We only apply damage if the target ship is alive
-				if let Some(ship_d) = res.gx.get_ship_mut(ship.data_handle) {
-					ship_d.apply_damage(projectile.content.damage);
-				}
+				ship.data.apply_damage(res.ct, projectile.content.damage);
 				true
 			}
 			_ => false,
@@ -159,40 +152,29 @@ impl<'a> SystemSim {
 }
 
 // Public methods
-impl SystemSim {
+impl PhysSim {
 	/// Create a new physics system
-	pub fn new(ct: &Content, gx: &Galaxy, system: SystemHandle) -> Self {
-		let mut w = Self {
+	pub fn new(_ct: &Content, system: SystemHandle) -> Self {
+		Self {
 			_system: system,
 			rigid_body_set: RigidBodySet::new(),
 			collider_set: ColliderSet::new(),
 			projectiles: HashMap::new(),
 			ships: HashMap::new(),
 			ship_behaviors: HashMap::new(),
-			collider_ship_table: HashMap::new(),
-		};
-
-		// TODO: guarantee not touching
-		// TODO: add, remove ships each tick
-		// Maybe store position in galaxy crate?
-		let mut rng = rand::thread_rng();
-		for s in gx.iter_ships() {
-			w.add_ship(
-				ct,
-				s,
-				Point2 {
-					x: rng.gen_range(-500.0..=500.0),
-					y: rng.gen_range(-500.0..=500.0),
-				},
-			);
 		}
-
-		return w;
 	}
 
 	/// Add a ship to this physics system
-	pub fn add_ship(&mut self, ct: &Content, ship: &GxShip, position: Point2<f32>) {
-		let ship_content = ct.get_ship(ship.get_content());
+	pub fn add_ship(
+		&mut self,
+		ct: &Content,
+		handle: ShipHandle,
+		faction: FactionHandle,
+		personality: ShipPersonality,
+		position: Point2<f32>,
+	) -> PhysSimShipHandle {
+		let ship_content = ct.get_ship(handle);
 		let cl = ColliderBuilder::convex_decomposition(
 			&ship_content.collision.points[..],
 			&ship_content.collision.indices[..],
@@ -209,25 +191,25 @@ impl SystemSim {
 			.translation(vector![position.x, position.y])
 			.can_sleep(false);
 
-		let r = self.rigid_body_set.insert(rb.build());
-		let c = self
-			.collider_set
-			.insert_with_parent(cl.build(), r, &mut self.rigid_body_set);
-
-		self.collider_ship_table.insert(c, ship.get_handle());
+		let ridid_body = self.rigid_body_set.insert(rb.build());
+		let collider =
+			self.collider_set
+				.insert_with_parent(cl.build(), ridid_body, &mut self.rigid_body_set);
 
 		self.ship_behaviors.insert(
-			ship.get_handle(),
-			match ship.get_personality() {
+			collider,
+			match personality {
 				ShipPersonality::Dummy | ShipPersonality::Player => ShipController::new_null(),
 				ShipPersonality::Point => ShipController::new_point(),
 			},
 		);
 
 		self.ships.insert(
-			ship.get_handle(),
-			SySimShip::new(ct, ship.get_handle(), ship.get_faction(), r, c),
+			collider,
+			PhysSimShip::new(ct, handle, personality, faction, ridid_body, collider),
 		);
+
+		return PhysSimShipHandle(collider);
 	}
 
 	/// Update a player ship's controls
@@ -248,75 +230,65 @@ impl SystemSim {
 	/// - updates ship controls (runs behaviors)
 	/// - applies ship controls
 	/// - creates projectiles
-	fn step_ships(&mut self, res: &mut StepResources) {
+	fn step_ships(&mut self, res: &mut PhysStepResources) {
 		// We can't apply these right away since self is borrowed
 		// by the iterator
 		// TODO: don't allocate!
 		let mut projectiles = Vec::new();
 		let mut to_remove = Vec::new();
-		for (_, handle) in &self.collider_ship_table {
+		// Again, borrow checker hack. TODO: fix
+		let keys: Vec<_> = self.ships.keys().map(|c| *c).collect();
+		for collider in keys {
 			// Borrow immutably for now...
 			// (required to compute controls)
-			let ship_object = self.ships.get(handle).unwrap();
-			if ship_object.should_be_removed() {
-				to_remove.push(ship_object.collider);
+			let ship = self.ships.get(&collider).unwrap();
+			if ship.data.get_state().should_be_removed() {
+				to_remove.push(collider);
 				continue;
 			}
 
-			// Short-circuit continue if this ship isn't in game data
-			// (which means it's playing a collapse sequence)
-			if res.gx.get_ship(*handle).is_none() {
-				let ship_object = self.ships.get_mut(handle).unwrap();
-				ship_object.step(
+			// This ship is playing a collapse sequence
+			// and needs no additional logic
+			if ship.data.get_state().is_collapsing() {
+				let ship = self.ships.get_mut(&collider).unwrap();
+				ship.step(
 					res,
-					&mut self.rigid_body_set[ship_object.rigid_body],
-					&mut self.collider_set[ship_object.collider],
+					&mut self.rigid_body_set[ship.rigid_body],
+					&mut self.collider_set[ship.collider],
 				);
 				continue;
 			}
 
 			// Compute new controls
 			let controls;
-			let b = self.ship_behaviors.get_mut(handle).unwrap();
-			controls = b.update_controls(
-				&res,
-				&self.rigid_body_set,
-				&self.ships,
-				ship_object.rigid_body,
-				*handle,
-			);
+			let b = self.ship_behaviors.get_mut(&collider).unwrap();
+			controls = b.update_controls(&res, &self.rigid_body_set, &self.ships, ship.collider);
+
+			let ship = self.ships.get_mut(&collider).unwrap();
 
-			// Now re-borrow mutably to apply changes
-			let ship_object = self.ships.get_mut(handle).unwrap();
 			if let Some(controls) = controls {
-				ship_object.controls = controls;
+				ship.controls = controls;
 			}
-			ship_object.step(
+			ship.step(
 				res,
-				&mut self.rigid_body_set[ship_object.rigid_body],
-				&mut self.collider_set[ship_object.collider],
+				&mut self.rigid_body_set[ship.rigid_body],
+				&mut self.collider_set[ship.collider],
 			);
 
 			// If we're firing, try to fire each gun
-			if ship_object.controls.guns {
-				let ship_data = res.gx.get_ship_mut(ship_object.data_handle).unwrap();
-
+			if ship.controls.guns {
 				// TODO: don't allocate here. This is a hack to satisfy the borrow checker,
 				// convert this to a refcell or do the replace dance.
-				let pairs: Vec<(GunPoint, Option<OutfitHandle>)> = ship_data
+				let pairs: Vec<(GunPoint, Option<OutfitHandle>)> = ship
+					.data
 					.get_outfits()
 					.iter_gun_points()
 					.map(|(p, o)| (p.clone(), o.clone()))
 					.collect();
 
 				for (gun, outfit) in pairs {
-					if ship_data.fire_gun(res.ct, &gun) {
-						projectiles.push((
-							ship_object.data_handle,
-							ship_object.rigid_body,
-							gun.clone(),
-							outfit.unwrap(),
-						));
+					if ship.data.fire_gun(res.ct, &gun) {
+						projectiles.push((ship.collider, gun.clone(), outfit.unwrap()));
 					}
 				}
 			}
@@ -328,11 +300,11 @@ impl SystemSim {
 		}
 
 		// Create projectiles
-		for (ship_dat, rigid_body, gun_point, outfit) in projectiles {
+		for (collider, gun_point, outfit) in projectiles {
 			let mut rng = rand::thread_rng();
-			let rigid_body = self.get_rigid_body(rigid_body).unwrap();
 
-			let ship_dat = res.gx.get_ship(ship_dat).unwrap();
+			let ship = self.ships.get(&collider).unwrap();
+			let rigid_body = self.get_rigid_body(ship.rigid_body).unwrap();
 			let ship_pos = util::rigidbody_position(rigid_body);
 			let ship_rot = util::rigidbody_rotation(rigid_body);
 			let ship_vel = util::rigidbody_velocity(rigid_body);
@@ -379,10 +351,10 @@ impl SystemSim {
 
 			self.projectiles.insert(
 				collider.clone(),
-				SySimProjectile::new(
+				PhysProjectile::new(
 					outfit.projectile.clone(),
 					rigid_body,
-					ship_dat.get_faction(),
+					ship.data.get_faction(),
 					collider,
 				),
 			);
@@ -390,7 +362,7 @@ impl SystemSim {
 	}
 
 	/// Step this physics system by `t` seconds
-	pub fn step(&mut self, mut res: StepResources) {
+	pub fn step(&mut self, mut res: PhysStepResources) {
 		res.timing.start_physics_ships();
 		self.step_ships(&mut res);
 		res.timing.mark_physics_ships();
@@ -416,11 +388,7 @@ impl SystemSim {
 				};
 
 				let p = self.projectiles.get(&a);
-				let s = self.ships.get_mut(match self.collider_ship_table.get(&b) {
-					// If none, this ship is dead.
-					Some(x) => x,
-					None => continue,
-				});
+				let s = self.ships.get_mut(&b);
 				if p.is_none() || s.is_none() {
 					continue;
 				}
@@ -474,10 +442,15 @@ impl SystemSim {
 }
 
 // Public getters
-impl SystemSim {
+impl PhysSim {
 	/// Get a ship physics object
-	pub fn get_ship(&self, ship: GxShipHandle) -> Option<&SySimShip> {
-		self.ships.get(&ship)
+	pub fn get_ship(&self, ship: &PhysSimShipHandle) -> Option<&PhysSimShip> {
+		self.ships.get(&ship.0)
+	}
+
+	/// Get a ship physics object
+	pub fn get_ship_mut(&mut self, ship: &PhysSimShipHandle) -> Option<&mut PhysSimShip> {
+		self.ships.get_mut(&ship.0)
 	}
 
 	/// Get a rigid body from a handle
@@ -491,19 +464,19 @@ impl SystemSim {
 	}
 
 	/// Iterate over all ships in this physics system
-	pub fn iter_ship_body(&self) -> impl Iterator<Item = (&SySimShip, &RigidBody)> + '_ {
+	pub fn iter_ship_body(&self) -> impl Iterator<Item = (&PhysSimShip, &RigidBody)> + '_ {
 		self.ships
 			.values()
 			.map(|x| (x, self.rigid_body_set.get(x.rigid_body).unwrap()))
 	}
 
 	/// Iterate over all ships in this physics system
-	pub fn iter_ships(&self) -> impl Iterator<Item = &SySimShip> + '_ {
+	pub fn iter_ships(&self) -> impl Iterator<Item = &PhysSimShip> + '_ {
 		self.ships.values()
 	}
 
 	/// Iterate over all ships in this physics system
-	pub fn iter_projectiles(&self) -> impl Iterator<Item = &SySimProjectile> + '_ {
+	pub fn iter_projectiles(&self) -> impl Iterator<Item = &PhysProjectile> + '_ {
 		self.projectiles.values()
 	}
 }

crates/util/src/timing.rs

@@ -9,10 +9,6 @@ pub struct Timing {
 	pub frame: Duration,
 	frame_timer: Instant,
 
-	/// The time we spent simulating game state
-	pub galaxy: Duration,
-	galaxy_timer: Instant,
-
 	/// The time we spent simulating physics
 	pub physics_sim: Duration,
 	physics_sim_timer: Instant,
@@ -29,10 +25,8 @@ impl Timing {
 	pub fn new() -> Self {
 		Self {
 			frame: Duration::ZERO,
-			galaxy: Duration::ZERO,
 			physics_sim: Duration::ZERO,
 			physics_ship: Duration::ZERO,
-			galaxy_timer: Instant::now(),
 			physics_sim_timer: Instant::now(),
 			physics_ship_timer: Instant::now(),
 			frame_timer: Instant::now(),
@@ -44,11 +38,6 @@ impl Timing {
 		self.frame_timer = Instant::now();
 	}
 
-	/// Start galaxy timer
-	pub fn start_galaxy(&mut self) {
-		self.galaxy_timer = Instant::now();
-	}
-
 	/// Start physics sim timer
 	pub fn start_physics_sim(&mut self) {
 		self.physics_sim_timer = Instant::now();
@@ -59,16 +48,11 @@ impl Timing {
 		self.physics_ship_timer = Instant::now();
 	}
 
-	/// Record galaxy simulation time.
+	/// Record total frame compute time
 	pub fn mark_frame(&mut self) {
 		self.frame = self.frame_timer.elapsed();
 	}
 
-	/// Record galaxy simulation time.
-	pub fn mark_galaxy(&mut self) {
-		self.galaxy = self.galaxy_timer.elapsed();
-	}
-
 	/// Record physics simulation time
 	pub fn mark_physics_sim(&mut self) {
 		self.physics_sim = self.physics_sim_timer.elapsed();