Reworked guns and projectile spawning

content/guns.toml

@@ -1,37 +0,0 @@
-[gun."blaster"]
-
-space.weapon = 10
-
-# Average delay between shots
-rate = 0.2
-# Random rate variation (each cooldown is +- this)
-rate_rng = 0.1
-
-# TODO: apply force to ship on fire
-projectile.sprite = "projectile::blaster"
-# Height of projectile in game units
-projectile.size = 6
-projectile.size_rng = 0.0
-# Speed of projectile, in game units/second
-projectile.speed = 300
-projectile.speed_rng = 10.0
-# Lifetime of projectile, in seconds
-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
-# How much force this projectile will apply to an object it hits
-projectile.force = 0.0
-
-projectile.collider.ball.radius = 2.0
-
-projectile.impact_effect = "blaster impact"
-
-projectile.expire_effect.sprite = "particle::blaster"
-projectile.expire_effect.lifetime = "inherit"
-projectile.expire_effect.size = 3.0
-projectile.expire_effect.velocity_scale_parent = 1.0

content/outfits.toml

@@ -14,3 +14,42 @@ space.outfit = 5
 shield.generation = 10
 shield.strength = 500
 shield.delay = 2.0
+
+
+[outfit."blaster"]
+
+space.weapon = 10
+
+# Average delay between shots
+gun.rate = 0.2
+# Random rate variation (each cooldown is +- this)
+gun.rate_rng = 0.1
+
+# TODO: apply force to ship on fire
+gun.projectile.sprite = "projectile::blaster"
+# Height of projectile in game units
+gun.projectile.size = 6
+gun.projectile.size_rng = 0.0
+# Speed of projectile, in game units/second
+gun.projectile.speed = 300
+gun.projectile.speed_rng = 10.0
+# Lifetime of projectile, in seconds
+gun.projectile.lifetime = 2.0
+gun.projectile.lifetime_rng = 0.2
+gun.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 )
+gun.projectile.angle_rng = 2
+# How much force this projectile will apply to an object it hits
+gun.projectile.force = 0.0
+
+gun.projectile.collider.ball.radius = 2.0
+
+gun.projectile.impact_effect = "blaster impact"
+
+gun.projectile.expire_effect.sprite = "particle::blaster"
+gun.projectile.expire_effect.lifetime = "inherit"
+gun.projectile.expire_effect.size = 3.0
+gun.projectile.expire_effect.velocity_scale_parent = 1.0

crates/content/src/lib.rs

@@ -28,11 +28,10 @@ mod syntax {
 	use serde::Deserialize;
 	use std::{collections::HashMap, fmt::Display, hash::Hash};
 
-	use crate::part::{effect, faction, gun, outfit, ship, sprite, system};
+	use crate::part::{effect, faction, outfit, ship, sprite, system};
 
 	#[derive(Debug, Deserialize)]
 	pub struct Root {
-		pub gun: Option<HashMap<String, gun::syntax::Gun>>,
 		pub ship: Option<HashMap<String, ship::syntax::Ship>>,
 		pub system: Option<HashMap<String, system::syntax::System>>,
 		pub outfit: Option<HashMap<String, outfit::syntax::Outfit>>,
@@ -69,7 +68,6 @@ mod syntax {
 	impl Root {
 		pub fn new() -> Self {
 			Self {
-				gun: None,
 				ship: None,
 				system: None,
 				outfit: None,
@@ -80,7 +78,6 @@ mod syntax {
 		}
 
 		pub fn merge(&mut self, other: Root) -> Result<()> {
-			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")?;
@@ -241,9 +238,6 @@ impl Content {
 		if root.ship.is_some() {
 			part::ship::Ship::build(root.ship.take().unwrap(), &mut build_context, &mut content)?;
 		}
-		if root.gun.is_some() {
-			part::gun::Gun::build(root.gun.take().unwrap(), &mut build_context, &mut content)?;
-		}
 		if root.outfit.is_some() {
 			part::outfit::Outfit::build(
 				root.outfit.take().unwrap(),

crates/content/src/part/gun.rs

@@ -1,186 +0,0 @@
-use anyhow::{bail, Context, Result};
-use cgmath::{Deg, Rad};
-use serde::Deserialize;
-use std::collections::HashMap;
-
-use crate::{handle::SpriteHandle, Content};
-
-use crate::{ContentBuildContext, EffectHandle, OutfitSpace};
-
-pub(crate) mod syntax {
-	use crate::part::effect;
-	use crate::part::outfitspace;
-	use serde::Deserialize;
-	// Raw serde syntax structs.
-	// These are never seen by code outside this crate.
-
-	#[derive(Debug, Deserialize)]
-	pub struct Gun {
-		pub projectile: Projectile,
-		pub rate: f32,
-		pub rate_rng: f32,
-		pub space: outfitspace::syntax::OutfitSpace,
-	}
-
-	#[derive(Debug, Deserialize)]
-	pub struct Projectile {
-		pub sprite: String,
-		pub size: f32,
-		pub size_rng: f32,
-		pub speed: f32,
-		pub speed_rng: f32,
-		pub lifetime: f32,
-		pub lifetime_rng: f32,
-		pub damage: f32,
-		pub angle_rng: f32,
-		pub impact_effect: Option<effect::syntax::EffectReference>,
-		pub expire_effect: Option<effect::syntax::EffectReference>,
-		pub collider: super::ProjectileCollider,
-		pub force: f32,
-	}
-}
-
-/// Defines a projectile's collider
-#[derive(Debug, Deserialize, Clone)]
-pub enum ProjectileCollider {
-	/// A ball collider
-	#[serde(rename = "ball")]
-	Ball(BallCollider),
-}
-
-/// A simple ball-shaped collider, centered at the object's position
-#[derive(Debug, Deserialize, Clone)]
-pub struct BallCollider {
-	/// The radius of this ball
-	pub radius: f32,
-}
-
-/// Represents a gun outfit.
-#[derive(Debug, Clone)]
-pub struct Gun {
-	/// The name of this gun
-	pub name: String,
-
-	/// The projectile this gun produces
-	pub projectile: Projectile,
-
-	/// Average delay between projectiles, in seconds.
-	pub rate: f32,
-
-	/// Random variation of projectile delay, in seconds.
-	/// Each shot waits (rate += rate_rng).
-	pub rate_rng: f32,
-
-	/// How much space this gun uses
-	pub space: OutfitSpace,
-}
-
-/// Represents a projectile that a [`Gun`] produces.
-#[derive(Debug, Clone)]
-pub struct Projectile {
-	/// The projectile sprite
-	pub sprite: SpriteHandle,
-
-	/// The average size of this projectile
-	/// (height in game units)
-	pub size: f32,
-	/// Random size variation
-	pub size_rng: f32,
-
-	/// The speed of this projectile, in game units / second
-	pub speed: f32,
-	/// Random speed variation
-	pub speed_rng: f32,
-
-	/// The lifespan of this projectile.
-	/// It will vanish if it lives this long without hitting anything.
-	pub lifetime: f32,
-	/// Random lifetime variation
-	pub lifetime_rng: f32,
-
-	/// The damage this projectile does
-	pub damage: f32,
-
-	/// The force this projectile applies
-	pub force: 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: Rad<f32>,
-
-	/// The particle this projectile will spawn when it hits something
-	pub impact_effect: Option<EffectHandle>,
-
-	/// The particle this projectile will spawn when it expires
-	pub expire_effect: Option<EffectHandle>,
-
-	/// Collider parameters for this projectile
-	pub collider: ProjectileCollider,
-}
-
-impl crate::Build for Gun {
-	type InputSyntaxType = HashMap<String, syntax::Gun>;
-
-	fn build(
-		gun: Self::InputSyntaxType,
-		build_context: &mut ContentBuildContext,
-		content: &mut Content,
-	) -> Result<()> {
-		for (gun_name, gun) in gun {
-			let projectile_sprite_handle = match content.sprite_index.get(&gun.projectile.sprite) {
-				None => bail!(
-					"projectile sprite `{}` doesn't exist in gun `{}`",
-					gun.projectile.sprite,
-					gun_name,
-				),
-				Some(t) => *t,
-			};
-
-			let impact_effect = match gun.projectile.impact_effect {
-				Some(e) => Some(
-					e.to_handle(build_context, content)
-						.with_context(|| format!("while loading gun `{}`", gun_name))?,
-				),
-				None => None,
-			};
-
-			let expire_effect = match gun.projectile.expire_effect {
-				Some(e) => Some(
-					e.to_handle(build_context, content)
-						.with_context(|| format!("while loading gun `{}`", gun_name))?,
-				),
-				None => None,
-			};
-
-			content.guns.push(Self {
-				name: gun_name,
-				space: gun.space.into(),
-				rate: gun.rate,
-				rate_rng: gun.rate_rng,
-				projectile: Projectile {
-					force: gun.projectile.force,
-					sprite: projectile_sprite_handle,
-					size: gun.projectile.size,
-					size_rng: gun.projectile.size_rng,
-					speed: gun.projectile.speed,
-					speed_rng: gun.projectile.speed_rng,
-					lifetime: gun.projectile.lifetime,
-					lifetime_rng: gun.projectile.lifetime_rng,
-					damage: gun.projectile.damage,
-
-					// Divide by 2, so the angle matches the angle of the fire cone.
-					// This should ALWAYS be done in the content parser.
-					angle_rng: Deg(gun.projectile.angle_rng / 2.0).into(),
-					impact_effect,
-					expire_effect,
-					collider: gun.projectile.collider,
-				},
-			});
-		}
-
-		return Ok(());
-	}
-}

crates/content/src/part/mod.rs

@@ -2,7 +2,6 @@
 
 pub(crate) mod effect;
 pub(crate) mod faction;
-pub(crate) mod gun;
 pub(crate) mod outfit;
 pub(crate) mod outfitspace;
 pub(crate) mod ship;
@@ -11,8 +10,7 @@ pub(crate) mod system;
 
 pub use effect::Effect;
 pub use faction::{Faction, Relationship};
-pub use gun::{Gun, Projectile, ProjectileCollider};
-pub use outfit::Outfit;
+pub use outfit::{Gun, Outfit, Projectile, ProjectileCollider};
 pub use outfitspace::OutfitSpace;
 pub use ship::{
 	CollapseEffectSpawner, CollapseEvent, EffectCollapseEvent, EnginePoint, GunPoint, Ship,

crates/content/src/part/outfit.rs

@@ -1,11 +1,17 @@
 use std::collections::HashMap;
 
-use anyhow::{bail, Result};
+use anyhow::{bail, Context, Result};
+use cgmath::Rad;
+use serde::Deserialize;
 
-use crate::{handle::SpriteHandle, Content, ContentBuildContext, OutfitHandle, OutfitSpace};
+use crate::{
+	handle::SpriteHandle, Content, ContentBuildContext, EffectHandle, OutfitHandle, OutfitSpace,
+};
 
 pub(crate) mod syntax {
-	use crate::part::outfitspace;
+	use crate::{effect, part::outfitspace, ContentBuildContext};
+	use anyhow::{bail, Result};
+	use cgmath::Deg;
 	use serde::Deserialize;
 	// Raw serde syntax structs.
 	// These are never seen by code outside this crate.
@@ -16,6 +22,7 @@ pub(crate) mod syntax {
 		pub steering: Option<Steering>,
 		pub space: outfitspace::syntax::OutfitSpace,
 		pub shield: Option<Shield>,
+		pub gun: Option<Gun>,
 	}
 
 	#[derive(Debug, Deserialize)]
@@ -36,6 +43,79 @@ pub(crate) mod syntax {
 	pub struct Steering {
 		pub power: f32,
 	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct Gun {
+		pub projectile: Projectile,
+		pub rate: f32,
+		pub rate_rng: Option<f32>,
+	}
+
+	impl Gun {
+		pub fn build(
+			self,
+			build_context: &mut ContentBuildContext,
+			content: &mut crate::Content,
+		) -> Result<super::Gun> {
+			let projectile_sprite_handle = match content.sprite_index.get(&self.projectile.sprite) {
+				None => bail!(
+					"projectile sprite `{}` doesn't exist",
+					self.projectile.sprite,
+				),
+				Some(t) => *t,
+			};
+
+			let impact_effect = match self.projectile.impact_effect {
+				Some(e) => Some(e.to_handle(build_context, content)?),
+				None => None,
+			};
+
+			let expire_effect = match self.projectile.expire_effect {
+				Some(e) => Some(e.to_handle(build_context, content)?),
+				None => None,
+			};
+
+			return Ok(super::Gun {
+				rate: self.rate,
+				rate_rng: self.rate_rng.unwrap_or(0.0),
+				projectile: super::Projectile {
+					force: self.projectile.force,
+					sprite: projectile_sprite_handle,
+					size: self.projectile.size,
+					size_rng: self.projectile.size_rng,
+					speed: self.projectile.speed,
+					speed_rng: self.projectile.speed_rng,
+					lifetime: self.projectile.lifetime,
+					lifetime_rng: self.projectile.lifetime_rng,
+					damage: self.projectile.damage,
+
+					// Divide by 2, so the angle matches the angle of the fire cone.
+					// This should ALWAYS be done in the content parser.
+					angle_rng: Deg(self.projectile.angle_rng / 2.0).into(),
+					impact_effect,
+					expire_effect,
+					collider: self.projectile.collider,
+				},
+			});
+		}
+	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct Projectile {
+		pub sprite: String,
+		pub size: f32,
+		pub size_rng: f32,
+		pub speed: f32,
+		pub speed_rng: f32,
+		pub lifetime: f32,
+		pub lifetime_rng: f32,
+		pub damage: f32,
+		pub angle_rng: f32,
+		pub impact_effect: Option<effect::syntax::EffectReference>,
+		pub expire_effect: Option<effect::syntax::EffectReference>,
+		pub collider: super::ProjectileCollider,
+		pub force: f32,
+	}
 }
 
 /// Represents an outfit that may be attached to a ship.
@@ -69,6 +149,82 @@ pub struct Outfit {
 
 	/// Wait this many seconds after taking damage before regenerating shields
 	pub shield_delay: f32,
+
+	/// This outfit's gun stats.
+	/// If this is some, this outfit requires a gun point.
+	pub gun: Option<Gun>,
+}
+
+/// Defines a projectile's collider
+#[derive(Debug, Deserialize, Clone)]
+pub enum ProjectileCollider {
+	/// A ball collider
+	#[serde(rename = "ball")]
+	Ball(BallCollider),
+}
+
+/// A simple ball-shaped collider, centered at the object's position
+#[derive(Debug, Deserialize, Clone)]
+pub struct BallCollider {
+	/// The radius of this ball
+	pub radius: f32,
+}
+
+/// Represents gun stats of an outfit.
+/// If an outfit has this value, it requires a gun point.
+#[derive(Debug, Clone)]
+pub struct Gun {
+	/// The projectile this gun produces
+	pub projectile: Projectile,
+
+	/// Average delay between projectiles, in seconds.
+	pub rate: f32,
+
+	/// Random variation of projectile delay, in seconds.
+	/// Each shot waits (rate += rate_rng).
+	pub rate_rng: f32,
+}
+
+/// Represents a projectile that a [`Gun`] produces.
+#[derive(Debug, Clone)]
+pub struct Projectile {
+	/// The projectile sprite
+	pub sprite: SpriteHandle,
+
+	/// The average size of this projectile
+	/// (height in game units)
+	pub size: f32,
+	/// Random size variation
+	pub size_rng: f32,
+
+	/// The speed of this projectile, in game units / second
+	pub speed: f32,
+	/// Random speed variation
+	pub speed_rng: f32,
+
+	/// The lifespan of this projectile.
+	/// It will vanish if it lives this long without hitting anything.
+	pub lifetime: f32,
+	/// Random lifetime variation
+	pub lifetime_rng: f32,
+
+	/// The damage this projectile does
+	pub damage: f32,
+
+	/// The force this projectile applies
+	pub force: f32,
+
+	/// The angle variation of this projectile.
+	pub angle_rng: Rad<f32>,
+
+	/// The particle this projectile will spawn when it hits something
+	pub impact_effect: Option<EffectHandle>,
+
+	/// The particle this projectile will spawn when it expires
+	pub expire_effect: Option<EffectHandle>,
+
+	/// Collider parameters for this projectile
+	pub collider: ProjectileCollider,
 }
 
 impl crate::Build for Outfit {
@@ -76,7 +232,7 @@ impl crate::Build for Outfit {
 
 	fn build(
 		outfits: Self::InputSyntaxType,
-		_build_context: &mut ContentBuildContext,
+		build_context: &mut ContentBuildContext,
 		content: &mut Content,
 	) -> Result<()> {
 		for (outfit_name, outfit) in outfits {
@@ -84,7 +240,16 @@ impl crate::Build for Outfit {
 				index: content.outfits.len(),
 			};
 
+			let gun = match outfit.gun {
+				None => None,
+				Some(g) => Some(
+					g.build(build_context, content)
+						.with_context(|| format!("in outfit {}", outfit_name))?,
+				),
+			};
+
 			let mut o = Self {
+				gun,
 				handle,
 				name: outfit_name.clone(),
 				engine_thrust: 0.0,

crates/galactica/src/game.rs

@@ -1,7 +1,4 @@
-use object::{
-	ship::{OutfitSet, ShipPersonality},
-	GameData, GameShipHandle,
-};
+use object::{ship::ShipPersonality, GameData, GameShipHandle};
 use std::time::Instant;
 use winit::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, VirtualKeyCode};
 
@@ -12,7 +9,7 @@ use galactica_constants;
 use galactica_content as content;
 use galactica_gameobject as object;
 use galactica_render::RenderState;
-use galactica_world::{objects::ShipControls, ParticleBuilder, StepResources, World};
+use galactica_world::{objects::ShipControls, util, ParticleBuilder, StepResources, World};
 
 pub struct Game {
 	input: InputStatus,
@@ -36,45 +33,35 @@ impl Game {
 	pub fn new(ct: content::Content) -> Self {
 		let mut gamedata = GameData::new(&ct);
 
-		let ss = ct.get_ship(content::ShipHandle { index: 0 });
-
-		let mut o1 = OutfitSet::new(ss.space, &[]);
-		o1.add(&ct.get_outfit(content::OutfitHandle { index: 0 }));
-		o1.add(&ct.get_outfit(content::OutfitHandle { index: 1 }));
-		//o1.add_gun(&ct, content::GunHandle { index: 0 });
-		//o1.add_gun(&ct, content::GunHandle { index: 0 });
-		//o1.add_gun(&ct, content::GunHandle { index: 0 });
-
 		let player = gamedata.create_ship(
 			&ct,
 			content::ShipHandle { index: 0 },
 			content::FactionHandle { index: 0 },
 			ShipPersonality::Player,
-			o1.clone(),
 			&content::SystemHandle { index: 0 },
 		);
+		let s = gamedata.get_ship_mut(player).unwrap();
+		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 0 }));
+		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 1 }));
+		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 2 }));
 
 		gamedata.create_ship(
 			&ct,
 			content::ShipHandle { index: 0 },
 			content::FactionHandle { index: 1 },
 			ShipPersonality::Dummy,
-			OutfitSet::new(ss.space, &[]),
 			&content::SystemHandle { index: 0 },
 		);
 
-		let mut o1 = OutfitSet::new(ss.space, &[]);
-		o1.add(&ct.get_outfit(content::OutfitHandle { index: 0 }));
-		//o1.add_gun(&ct, content::GunHandle { index: 0 });
-
-		gamedata.create_ship(
+		let a = gamedata.create_ship(
 			&ct,
 			content::ShipHandle { index: 0 },
 			content::FactionHandle { index: 1 },
 			ShipPersonality::Point,
-			o1,
 			&content::SystemHandle { index: 0 },
 		);
+		let s = gamedata.get_ship_mut(a).unwrap();
+		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 0 }));
 
 		let physics = World::new(&ct, &gamedata, content::SystemHandle { index: 0 });
 
@@ -127,7 +114,9 @@ impl Game {
 	pub fn update(&mut self) {
 		let t: f32 = self.last_update.elapsed().as_secs_f32() * self.time_scale;
 
-		let world_output = self.world.step(StepResources {
+		self.gamedata.step(t);
+
+		self.world.step(StepResources {
 			player: self.player,
 			player_controls: ShipControls {
 				left: self.input.key_left,
@@ -147,7 +136,12 @@ impl Game {
 			self.input.v_scroll = 0.0;
 		}
 
-		self.camera.pos = world_output.player_position;
+		self.camera.pos = {
+			let o = self.world.get_ship(self.player).unwrap();
+			let r = self.world.get_rigid_body(o.rigid_body).unwrap();
+			util::rigidbody_position(r)
+		};
+
 		self.last_update = Instant::now();
 	}
 

crates/gameobject/src/gamedata.rs

@@ -1,10 +1,6 @@
 use std::collections::HashMap;
 
-use crate::{
-	handles::GameShipHandle,
-	ship::Ship,
-	ship::{OutfitSet, ShipPersonality},
-};
+use crate::{handles::GameShipHandle, ship::Ship, ship::ShipPersonality};
 use galactica_content as content;
 
 /// Keeps track of all objects in the galaxy.
@@ -44,7 +40,6 @@ impl GameData {
 		ship: content::ShipHandle,
 		faction: content::FactionHandle,
 		personality: ShipPersonality,
-		outfits: OutfitSet,
 		system: &content::SystemHandle,
 	) -> GameShipHandle {
 		let handle = GameShipHandle {
@@ -53,15 +48,19 @@ impl GameData {
 		};
 		self.index += 1;
 
-		self.ships.insert(
-			handle,
-			Ship::new(ct, handle, ship, faction, personality, outfits),
-		);
+		self.ships
+			.insert(handle, Ship::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) {
+		for (_, s) in &mut self.ships {
+			s.step(t);
+		}
+	}
 }
 
 // Public getters

crates/gameobject/src/ship/outfitset.rs

@@ -14,6 +14,10 @@ pub enum OutfitAddResult {
 	/// outfits may need outfit AND weapon space. In these cases, this result
 	/// should name the "most specific" kind of space we lack.
 	NotEnoughSpace(String),
+
+	/// An outfit couldn't be added because there weren't enough points for it
+	/// (e.g, gun points, turret points, etc)
+	NotEnoughPoints(String),
 }
 
 /// Possible outcomes when removing an outfit
@@ -37,6 +41,9 @@ pub(crate) struct ShieldGenerator {
 }
 
 /// This struct keeps track of a ship's outfit loadout.
+/// This is a fairly static data structure: it does not keep track of cooldowns,
+/// shield damage, etc. It only provides an interface for static stats which are
+/// then used elsewhere.
 #[derive(Debug, Clone)]
 pub struct OutfitSet {
 	/// What outfits does this statsum contain?
@@ -68,7 +75,7 @@ pub struct OutfitSet {
 }
 
 impl OutfitSet {
-	pub fn new(available_space: OutfitSpace, gun_points: &[GunPoint]) -> Self {
+	pub(super) fn new(available_space: OutfitSpace, gun_points: &[GunPoint]) -> Self {
 		Self {
 			outfits: HashMap::new(),
 			total_space: available_space,
@@ -82,11 +89,26 @@ impl OutfitSet {
 		}
 	}
 
-	pub fn add(&mut self, o: &content::Outfit) -> OutfitAddResult {
+	pub(super) fn add(&mut self, o: &content::Outfit) -> OutfitAddResult {
 		if !(self.total_space - self.used_space).can_contain(&o.space) {
 			return OutfitAddResult::NotEnoughSpace("TODO".to_string());
 		}
 
+		// Check and return as fast as possible,
+		// BEFORE we make any changes.
+		if o.gun.is_some() {
+			let mut added = false;
+			for (_, outfit) in &mut self.gun_points {
+				if outfit.is_none() {
+					*outfit = Some(o.handle);
+					added = true;
+				}
+			}
+			if !added {
+				return OutfitAddResult::NotEnoughPoints("gun".to_string());
+			}
+		}
+
 		self.used_space += o.space;
 
 		self.engine_thrust += o.engine_thrust;
@@ -107,7 +129,7 @@ impl OutfitSet {
 		return OutfitAddResult::Ok;
 	}
 
-	pub fn remove(&mut self, o: &content::Outfit) -> OutfitRemoveResult {
+	pub(super) fn remove(&mut self, o: &content::Outfit) -> OutfitRemoveResult {
 		if !self.outfits.contains_key(&o.handle) {
 			return OutfitRemoveResult::NotExist;
 		} else {
@@ -177,6 +199,12 @@ impl OutfitSet {
 		self.shield_generators.iter().map(|x| x.generation).sum()
 	}
 
+	/// Get the outfit attached to the given gun point
+	/// Will panic if this gunpoint is not in this outfit set.
+	pub fn get_gun(&self, point: &GunPoint) -> Option<OutfitHandle> {
+		self.gun_points.get(point).unwrap().clone()
+	}
+
 	/// Total available outfit space
 	pub fn get_total_space(&self) -> &OutfitSpace {
 		&self.total_space

crates/gameobject/src/ship/ship.rs

@@ -1,9 +1,11 @@
-use std::time::Instant;
+use std::{collections::HashMap, time::Instant};
 
 use crate::GameShipHandle;
 
 use super::{OutfitSet, ShipPersonality};
+use content::GunPoint;
 use galactica_content as content;
+use rand::{rngs::ThreadRng, Rng};
 
 #[derive(Debug)]
 pub struct Ship {
@@ -19,6 +21,8 @@ pub struct Ship {
 	// TODO: unified ship stats struct, like outfit space
 	hull: f32,
 	shields: f32,
+	gun_cooldowns: HashMap<GunPoint, f32>,
+	rng: ThreadRng,
 
 	// Utility values
 	/// The last time this ship was damaged
@@ -32,29 +36,61 @@ impl Ship {
 		ct_handle: content::ShipHandle,
 		faction: content::FactionHandle,
 		personality: ShipPersonality,
-		outfits: OutfitSet,
 	) -> Self {
 		let s = ct.get_ship(ct_handle);
-		let shields = outfits.get_shield_strength();
 		Ship {
 			handle,
 			ct_handle,
 			faction,
-			outfits,
+			outfits: OutfitSet::new(s.space, &s.guns),
 			personality,
 			last_hit: Instant::now(),
+			rng: rand::thread_rng(),
 
 			// Initial stats
 			hull: s.hull,
-			shields,
+			shields: 0.0,
+			gun_cooldowns: s.guns.iter().map(|x| (x.clone(), 0.0)).collect(),
 		}
 	}
 
+	/// Add an outfit to this ship
+	pub fn add_outfit(&mut self, o: &content::Outfit) -> super::OutfitAddResult {
+		self.outfits.add(o)
+	}
+
+	/// Remove an outfit from this ship
+	pub fn remove_outfit(&mut self, o: &content::Outfit) -> super::OutfitRemoveResult {
+		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::Content, which: &GunPoint) -> bool {
+		let c = self.gun_cooldowns.get_mut(which).unwrap();
+
+		if *c > 0.0 {
+			return false;
+		}
+
+		let g = self.outfits.get_gun(which);
+		if g.is_some() {
+			let g = ct.get_outfit(g.unwrap());
+			let gun = g.gun.as_ref().unwrap();
+			*c = 0f32.max(gun.rate + self.rng.gen_range(-gun.rate_rng..=gun.rate_rng));
+			return true;
+		} else {
+			return false;
+		}
+	}
+
 	/// Hit this ship with the given amount of damage
 	pub fn apply_damage(&mut self, mut d: f32) {
 		if self.is_dead() {
@@ -72,6 +108,14 @@ impl Ship {
 
 	/// Update this ship's state by `t` seconds
 	pub fn step(&mut self, t: f32) {
+		// Cooldown guns
+		for (_, c) in &mut self.gun_cooldowns {
+			if *c > 0.0 {
+				*c -= t;
+			}
+		}
+
+		// Regenerate shields
 		let time_since = self.last_hit.elapsed().as_secs_f32();
 		if self.shields != self.outfits.get_shield_strength() {
 			for g in self.outfits.iter_shield_generators() {

crates/world/src/objects/ship.rs

@@ -298,10 +298,6 @@ impl ShipWorldObject {
 			rigid_body
 				.apply_torque_impulse(ship.get_outfits().get_steer_power() * 100.0 * res.t, true);
 		}
-
-		//for i in self.ship.outfits.iter_guns() {
-		//	i.cooldown -= t;
-		//}
 	}
 }
 

crates/world/src/stepresources.rs

@@ -1,5 +1,4 @@
 use crate::{objects::ShipControls, ParticleBuilder};
-use cgmath::Point2;
 use galactica_content::Content;
 use galactica_gameobject::{GameData, GameShipHandle};
 
@@ -24,10 +23,3 @@ pub struct StepResources<'a> {
 	/// The ship that the player controls
 	pub player: GameShipHandle,
 }
-
-/// Return values after computing time steps
-#[derive(Debug)]
-pub struct StepOutput {
-	/// The player's position in world coordinates
-	pub player_position: Point2<f32>,
-}

crates/world/src/world.rs

@@ -1,4 +1,5 @@
 use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Point2, Rad, Vector2, Zero};
+use content::{GunPoint, OutfitHandle};
 use crossbeam::channel::Receiver;
 use nalgebra::{point, vector};
 use object::{ship::Ship, GameData, GameShipHandle};
@@ -15,7 +16,7 @@ use crate::{
 	objects::{ProjectileWorldObject, ShipWorldObject},
 	util,
 	wrapper::Wrapper,
-	ParticleBuilder, StepOutput, StepResources,
+	ParticleBuilder, StepResources,
 };
 use galactica_content as content;
 use galactica_gameobject as object;
@@ -23,7 +24,7 @@ use galactica_gameobject as object;
 /// Manages the physics state of one system
 pub struct World {
 	/// The system this world is attached to
-	system: content::SystemHandle,
+	_system: content::SystemHandle,
 
 	wrapper: Wrapper,
 	projectiles: HashMap<ColliderHandle, objects::ProjectileWorldObject>,
@@ -73,67 +74,6 @@ impl<'a> World {
 		self.ships.remove(&h);
 	}
 
-	/*
-	/// Add a projectile fired from a ship
-	fn add_projectiles(
-		&mut self,
-		s: ShipPhysicsHandle,
-		p: Vec<(ProjectileWorldObject, 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..=projectile.content.angle_rng.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 = match &projectile.content.collider {
-				content::ProjectileCollider::Ball(b) => ColliderBuilder::ball(b.radius)
-					.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::new(projectile, rigid_body, collider),
-			);
-		}
-	}
-	*/
-
 	fn collide_projectile_ship(
 		&mut self,
 		res: &mut StepResources,
@@ -152,10 +92,17 @@ impl<'a> World {
 
 		let ship_d = res.dt.get_ship_mut(ship.data_handle).unwrap();
 
-		// TODO: check faction
+		let f = res.ct.get_faction(projectile.faction);
+		let r = f.relationships.get(&ship_d.get_faction()).unwrap();
+		let destory_projectile = match r {
+			content::Relationship::Hostile => {
 				ship_d.apply_damage(projectile.content.damage);
+				true
+			}
+			_ => false,
+		};
 
-		if true {
+		if destory_projectile {
 			let pr = self
 				.wrapper
 				.rigid_body_set
@@ -210,14 +157,14 @@ impl<'a> World {
 }
 
 // Public methods
-impl<'a> World {
+impl World {
 	/// Create a new physics system
 	pub fn new(ct: &content::Content, dt: &GameData, system: content::SystemHandle) -> Self {
 		let (collision_send, collision_queue) = crossbeam::channel::unbounded();
 		let (contact_force_send, _) = crossbeam::channel::unbounded();
 
 		let mut w = Self {
-			system,
+			_system: system,
 			wrapper: Wrapper::new(),
 			projectiles: HashMap::new(),
 			ships: HashMap::new(),
@@ -283,45 +230,125 @@ impl<'a> World {
 		);
 	}
 
-	/// Step this physics system by `t` seconds
-	pub fn step(&mut self, mut res: StepResources) -> StepOutput {
-		let mut output = StepOutput {
-			player_position: Point2 { x: 0.0, y: 0.0 },
-		};
-
-		// Run ship updates
-		// TODO: maybe reorganize projectile creation?
-		//let mut projectiles = Vec::new();
+	/// Run ship updates:
+	/// - updates ship controls (runs behaviors)
+	/// - applies ship controls
+	/// - creates projectiles
+	fn step_ships(&mut self, res: &mut StepResources) {
+		let mut projectiles = Vec::new();
 		let mut to_remove = Vec::new();
-		for (_, s) in &mut self.ships {
-			let r = &mut self.wrapper.rigid_body_set[s.rigid_body];
-			let c = &mut self.wrapper.collider_set[s.collider];
-
-			if s.data_handle == res.player {
-				s.controls = res.player_controls.clone();
-				output.player_position = util::rigidbody_position(r);
-			} else {
-				s.update_controls(&res);
-			}
-
-			// TODO: unified step info struct
-			s.step(&mut res, r, c);
-			//if s.controls.guns {
-			//	projectiles.push((s.physics_handle, s.ship.fire_guns()));
-			//}
-
+		for (_, ship_object) in &mut self.ships {
 			//if s.remove_from_world() {
 			//	to_remove.push(s.physics_handle);
 			//	continue;
 			//}
+
+			let rigid_body = &mut self.wrapper.rigid_body_set[ship_object.rigid_body];
+			let collider = &mut self.wrapper.collider_set[ship_object.collider];
+
+			if ship_object.data_handle == res.player {
+				ship_object.controls = res.player_controls.clone();
+			} else {
+				ship_object.update_controls(&res);
 			}
-		//for (s, p) in projectiles {
-		//	self.add_projectiles(s, p);
-		//}
+
+			// TODO: unified step info struct
+			ship_object.step(res, rigid_body, collider);
+			if ship_object.controls.guns {
+				let ship_data = res.dt.get_ship_mut(ship_object.data_handle).unwrap();
+
+				// 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
+					.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(),
+						));
+					}
+				}
+			}
+		}
+
+		// Remove ships that don't exist
 		for s in to_remove {
 			self.remove_ship(s);
 		}
 
+		// Create projectiles
+		for (ship_dat, rigid_body, 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.dt.get_ship(ship_dat).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);
+			let ship_ang = ship_rot.angle(Vector2 { x: 0.0, y: 1.0 });
+
+			let pos = ship_pos + (Matrix2::from_angle(-ship_ang) * gun_point.pos.to_vec());
+
+			let outfit = res.ct.get_outfit(outfit);
+			let outfit = outfit.gun.as_ref().unwrap();
+
+			let spread: Rad<f32> =
+				Deg(rng.gen_range(-outfit.projectile.angle_rng.0..=outfit.projectile.angle_rng.0))
+					.into();
+
+			let vel = ship_vel
+				+ (Matrix2::from_angle(-ship_ang + spread)
+					* Vector2 {
+						x: 0.0,
+						y: outfit.projectile.speed
+							+ rng.gen_range(
+								-outfit.projectile.speed_rng..=outfit.projectile.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 = match &outfit.projectile.collider {
+				content::ProjectileCollider::Ball(b) => ColliderBuilder::ball(b.radius)
+					.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::new(
+					outfit.projectile.clone(),
+					rigid_body,
+					ship_dat.get_faction(),
+					collider,
+				),
+			);
+		}
+	}
+
+	/// Step this physics system by `t` seconds
+	pub fn step(&mut self, mut res: StepResources) {
+		self.step_ships(&mut res);
+
 		// Update physics
 		self.wrapper.step(res.t, &self.collision_handler);
 
@@ -390,10 +417,12 @@ impl<'a> World {
 				}
 			};
 		}
-
-		return output;
 	}
+}
 
+// Public getters
+impl World {
+	/// Get a ship physics object
 	pub fn get_ship(&self, ship: GameShipHandle) -> Option<&ShipWorldObject> {
 		self.ships.get(&ship)
 	}
@@ -418,12 +447,12 @@ impl<'a> World {
 	}
 
 	/// Iterate over all ships in this physics system
-	pub fn iter_ships(&'a self) -> impl Iterator<Item = &ShipWorldObject> + '_ {
+	pub fn iter_ships(&self) -> impl Iterator<Item = &ShipWorldObject> + '_ {
 		self.ships.values()
 	}
 
 	/// Iterate over all ships in this physics system
-	pub fn iter_projectiles(&'a self) -> impl Iterator<Item = &ProjectileWorldObject> + '_ {
+	pub fn iter_projectiles(&self) -> impl Iterator<Item = &ProjectileWorldObject> + '_ {
 		self.projectiles.values()
 	}
 }