Updated TODO

TODO.md

@@ -1,10 +1,10 @@
 ## Specific Jobs
+ - Start documenting
  - Check for handle leaks
  - Rename and crtl-f comments
-  - gameobject and world
-  - behavior and personality
-  - ship (content) / ship (data) / ship (world)
- - Fix ship controllers
+   - gameobject and world
+   - behavior and personality
+   - ship (content) / ship (data) / ship (world)
  - Don't allocate each frame
 
  - UI: text arranger
@@ -122,7 +122,7 @@
  - Non-removable outfits
  - Space-converting outfits
  - Damage struct and debuffs
- - 
+ -
 
 ## Camera
  - Shake/wobble on heavy hits?
@@ -146,7 +146,7 @@
 ## Write and Document
  - Parallax
  - Starfield & tiling
- - How the game is drawn 
+ - How the game is drawn
    - transforming game coordinates to screen
    - how angles work
  - Computation flow
@@ -176,4 +176,4 @@
    - Lose some outfits, lose ship? Real risk for going out! (HK does this well)
  - Damage to ship subsystems
  - Soft and highly armored ship points
- - Repair your own ship
+ - Repair your own ship

crates/content/src/part/system.rs

@@ -104,7 +104,7 @@ pub struct Object {
 
 	/// This object's position, in game coordinates,
 	/// relative to the system's center (0, 0).
-	pub position: Point3<f32>,
+	pub pos: Point3<f32>,
 
 	/// This object's sprite's angle.
 	pub angle: Rad<f32>,
@@ -200,13 +200,14 @@ impl crate::Build for System {
 
 				objects.push(Object {
 					sprite: handle,
-					position: resolve_position(&system.object, &obj, cycle_detector)
+					pos: resolve_position(&system.object, &obj, cycle_detector)
 						.with_context(|| format!("In object {:#?}", label))?,
 					size: obj.size,
 					angle: Deg(obj.angle.unwrap_or(0.0)).into(),
 				});
 			}
 
+			objects.sort_by(|a, b| a.pos.z.total_cmp(&b.pos.z));
 			content.systems.push(Self {
 				name: system_name,
 				objects,

crates/galactica/src/game.rs

@@ -45,23 +45,29 @@ impl Game {
 		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 1 }));
 		s.add_outfit(&ct.get_outfit(content::OutfitHandle { index: 2 }));
 
-		gamedata.create_ship(
+		let a = gamedata.create_ship(
 			&ct,
 			content::ShipHandle { index: 0 },
 			content::FactionHandle { index: 1 },
 			ShipPersonality::Dummy,
 			&content::SystemHandle { index: 0 },
 		);
+		let s = gamedata.get_ship_mut(a).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 }));
 
 		let a = gamedata.create_ship(
 			&ct,
 			content::ShipHandle { index: 0 },
-			content::FactionHandle { index: 1 },
+			content::FactionHandle { index: 0 },
 			ShipPersonality::Point,
 			&content::SystemHandle { index: 0 },
 		);
 		let s = gamedata.get_ship_mut(a).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 }));
 
 		let physics = World::new(&ct, &gamedata, content::SystemHandle { index: 0 });
 
@@ -151,10 +157,11 @@ impl Game {
 			camera_zoom: self.camera.zoom,
 			current_time: self.start_instant.elapsed().as_secs_f32(),
 			content: &self.content,
-			world: &self.world,
+			world: &self.world, // TODO: maybe system should be stored here?
 			particles: &mut self.new_particles,
 			player_data: self.player,
 			data: &self.gamedata,
+			current_system: content::SystemHandle { index: 0 },
 		}
 	}
 }

crates/gameobject/src/lib.rs

@@ -7,8 +7,6 @@
 mod gamedata;
 mod handles;
 pub mod ship;
-mod system;
 
 pub use gamedata::*;
 pub use handles::*;
-pub use system::{System, SystemObject};

crates/gameobject/src/ship/ship.rs

@@ -56,7 +56,9 @@ impl Ship {
 
 	/// Add an outfit to this ship
 	pub fn add_outfit(&mut self, o: &content::Outfit) -> super::OutfitAddResult {
-		self.outfits.add(o)
+		let r = self.outfits.add(o);
+		self.shields = self.outfits.get_shield_strength();
+		return r;
 	}
 
 	/// Remove an outfit from this ship

crates/gameobject/src/system.rs

@@ -1,37 +0,0 @@
-use cgmath::{Point3, Rad};
-use galactica_content as content;
-
-// TODO: rework
-
-pub struct System {
-	pub name: String,
-	pub bodies: Vec<SystemObject>,
-}
-
-impl System {
-	pub fn new(ct: &content::Content, handle: content::SystemHandle) -> Self {
-		let sys = ct.get_system(handle);
-		let mut s = System {
-			name: sys.name.clone(),
-			bodies: Vec::new(),
-		};
-
-		for o in &sys.objects {
-			s.bodies.push(SystemObject {
-				pos: o.position,
-				sprite: o.sprite,
-				size: o.size,
-				angle: o.angle,
-			});
-		}
-
-		return s;
-	}
-}
-
-pub struct SystemObject {
-	pub sprite: content::SpriteHandle,
-	pub pos: Point3<f32>,
-	pub size: f32,
-	pub angle: Rad<f32>,
-}

crates/render/src/gpustate/hud.rs

@@ -19,7 +19,7 @@ impl GPUState {
 		let radar_size = 300.0;
 		let hide_range = 0.85;
 		let shrink_distance = 20.0;
-		//let system_object_scale = 1.0 / 600.0;
+		let system_object_scale = 1.0 / 600.0;
 		let ship_scale = 1.0 / 10.0;
 
 		let player_world_object = state.world.get_ship(state.player_data).unwrap();
@@ -29,7 +29,7 @@ impl GPUState {
 			.unwrap();
 
 		let player_position = util::rigidbody_position(player_body);
-		//let planet_sprite = state.content.get_sprite_handle("ui::planetblip");
+		let planet_sprite = state.content.get_sprite_handle("ui::planetblip");
 		let ship_sprite = state.content.get_sprite_handle("ui::shipblip");
 		let arrow_sprite = state.content.get_sprite_handle("ui::centerarrow");
 
@@ -54,9 +54,9 @@ impl GPUState {
 		);
 		self.vertex_buffers.ui_counter += 1;
 
-		/*
 		// Draw system objects
-		for o in &system.bodies {
+		let system = state.content.get_system(state.current_system);
+		for o in &system.objects {
 			let size = (o.size / o.pos.z) / (radar_range * system_object_scale);
 			let p = Point2 {
 				x: o.pos.x,
@@ -72,24 +72,35 @@ impl GPUState {
 					// Don't draw super tiny sprites, they flicker
 					continue;
 				}
-				out.push(UiSprite {
-					sprite: planet_sprite,
-					pos: AnchoredUiPosition::NwC(
-						Point2 {
+
+				// Enforce buffer limit
+				if self.vertex_buffers.ui_counter as u64
+					> galactica_constants::UI_SPRITE_INSTANCE_LIMIT
+				{
+					// TODO: no panic, handle this better.
+					panic!("UI limit exceeded!")
+				}
+
+				// Push this object's instance
+				self.queue.write_buffer(
+					&self.vertex_buffers.ui.instances,
+					UiInstance::SIZE * self.vertex_buffers.ui_counter,
+					bytemuck::cast_slice(&[UiInstance {
+						anchor: PositionAnchor::NwC.to_int(),
+						position: (Point2 {
 							x: radar_size / 2.0 + 10.0,
 							y: radar_size / -2.0 - 10.0,
-						} + (d * (radar_size / 2.0)),
-					),
-					dimensions: Point2 {
-						x: planet_sprite.aspect,
-						y: 1.0,
-					} * size,
-					angle: o.angle,
-					color: Some([0.5, 0.5, 0.5, 1.0]),
-				});
+						} + (d * (radar_size / 2.0)))
+							.into(),
+						angle: o.angle.0,
+						size,
+						color: [0.5, 0.5, 0.5, 1.0],
+						sprite_index: planet_sprite.get_index(),
+					}]),
+				);
+				self.vertex_buffers.ui_counter += 1;
 			}
 		}
-		*/
 
 		// Draw ships
 		for (s, r) in state.world.iter_ship_body() {
@@ -123,6 +134,7 @@ impl GPUState {
 				} + (d * (radar_size / 2.0));
 
 				// Enforce buffer limit
+				// TODO: cleaner solution. don't do this everywhere.
 				if self.vertex_buffers.ui_counter as u64
 					> galactica_constants::UI_SPRITE_INSTANCE_LIMIT
 				{

crates/render/src/gpustate/mod.rs

@@ -364,13 +364,9 @@ impl 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.
-		for s in state.world.iter_ships() {
-			self.world_push_ship(state, (clip_ne, clip_sw), &s);
-		}
-
-		for p in state.world.iter_projectiles() {
-			self.world_push_projectile(state, (clip_ne, clip_sw), &p);
-		}
+		self.world_push_system(state, (clip_ne, clip_sw));
+		self.world_push_ship(state, (clip_ne, clip_sw));
+		self.world_push_projectile(state, (clip_ne, clip_sw));
 
 		self.hud_add_radar(state);
 		self.hud_add_status(state);

crates/render/src/gpustate/world.rs

@@ -2,10 +2,7 @@
 
 use bytemuck;
 use cgmath::{EuclideanSpace, InnerSpace, Point2, Vector2};
-use galactica_world::{
-	objects::{ProjectileWorldObject, ShipWorldObject},
-	util,
-};
+use galactica_world::util;
 
 use crate::{
 	globaluniform::ObjectData,
@@ -19,114 +16,115 @@ impl GPUState {
 		state: &RenderState,
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
-		s: &ShipWorldObject,
 	) {
-		let r = state.world.get_rigid_body(s.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.content.get_ship(s.data_handle.content_handle());
+		for s in state.world.iter_ships() {
+			let r = state.world.get_rigid_body(s.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.content.get_ship(s.data_handle.content_handle());
 
-		// Position adjusted for parallax
-		// TODO: adjust parallax for zoom?
-		// 1.0 is z-coordinate, which is constant for ships
-		let pos: Point2<f32> = (ship_pos - state.camera_pos.to_vec()) / 1.0;
+			// Position adjusted for parallax
+			// TODO: adjust parallax for zoom?
+			// 1.0 is z-coordinate, which is constant for ships
+			let pos: Point2<f32> = (ship_pos - state.camera_pos.to_vec()) / 1.0;
 
-		// Game dimensions of this sprite post-scale.
-		// Post-scale width or height, whichever is larger.
-		// This is in game units.
-		//
-		// We take the maximum to account for rotated sprites.
-		let m = (ship_cnt.size / 1.0) * ship_cnt.sprite.aspect.max(1.0);
+			// Game dimensions of this sprite post-scale.
+			// Post-scale width or height, whichever is larger.
+			// This is in game units.
+			//
+			// We take the maximum to account for rotated sprites.
+			let m = (ship_cnt.size / 1.0) * ship_cnt.sprite.aspect.max(1.0);
 
-		// Don't draw sprites that are off the screen
-		if pos.x < screen_clip.0.x - m
-			|| pos.y > screen_clip.0.y + m
-			|| pos.x > screen_clip.1.x + m
-			|| pos.y < screen_clip.1.y - m
-		{
-			return;
-		}
+			// Don't draw sprites that are off the screen
+			if pos.x < screen_clip.0.x - m
+				|| pos.y > screen_clip.0.y + m
+				|| pos.x > screen_clip.1.x + m
+				|| pos.y < screen_clip.1.y - m
+			{
+				continue;
+			}
 
-		let idx = self.vertex_buffers.object_counter;
-		// Write this object's location data
-		self.queue.write_buffer(
-			&self.global_uniform.object_buffer,
-			ObjectData::SIZE * idx as u64,
-			bytemuck::cast_slice(&[ObjectData {
-				xpos: ship_pos.x,
-				ypos: ship_pos.y,
-				zpos: 1.0,
-				angle: ship_ang.0,
-				size: ship_cnt.size,
-				parent: 0,
-				is_child: 0,
-				_padding: Default::default(),
-			}]),
-		);
+			let idx = self.vertex_buffers.object_counter;
+			// Write this object's location data
+			self.queue.write_buffer(
+				&self.global_uniform.object_buffer,
+				ObjectData::SIZE * idx as u64,
+				bytemuck::cast_slice(&[ObjectData {
+					xpos: ship_pos.x,
+					ypos: ship_pos.y,
+					zpos: 1.0,
+					angle: ship_ang.0,
+					size: ship_cnt.size,
+					parent: 0,
+					is_child: 0,
+					_padding: Default::default(),
+				}]),
+			);
 
-		// Enforce buffer limit
-		if self.vertex_buffers.object_counter as u64
-			> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
-		{
-			// TODO: no panic, handle this better.
-			panic!("Sprite limit exceeded!")
-		}
+			// Enforce buffer limit
+			if self.vertex_buffers.object_counter as u64
+				> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
+			{
+				// TODO: no panic, handle this better.
+				panic!("Sprite limit exceeded!")
+			}
 
-		// Push this object's instance
-		self.queue.write_buffer(
-			&self.vertex_buffers.object.instances,
-			ObjectInstance::SIZE * self.vertex_buffers.object_counter,
-			bytemuck::cast_slice(&[ObjectInstance {
-				sprite_index: ship_cnt.sprite.get_index(),
-				object_index: idx as u32,
-			}]),
-		);
-		self.vertex_buffers.object_counter += 1;
+			// Push this object's instance
+			self.queue.write_buffer(
+				&self.vertex_buffers.object.instances,
+				ObjectInstance::SIZE * self.vertex_buffers.object_counter,
+				bytemuck::cast_slice(&[ObjectInstance {
+					sprite_index: ship_cnt.sprite.get_index(),
+					object_index: idx as u32,
+				}]),
+			);
+			self.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.data.get_ship(s.data_handle) {
-			None => return,
-			Some(s) => s,
-		};
+			// 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.data.get_ship(s.data_handle) {
+				None => continue,
+				Some(s) => s,
+			};
 
-		let flare = ship.get_outfits().get_flare_sprite(state.content);
-		if s.get_controls().thrust && flare.is_some() {
-			for engine_point in &ship_cnt.engines {
-				self.queue.write_buffer(
-					&self.global_uniform.object_buffer,
-					ObjectData::SIZE * self.vertex_buffers.object_counter as u64,
-					bytemuck::cast_slice(&[ObjectData {
-						xpos: engine_point.pos.x,
-						ypos: engine_point.pos.y - engine_point.size / 2.0,
-						zpos: 1.0,
-						angle: 0.0,
-						size: engine_point.size,
-						parent: idx as u32,
-						is_child: 1,
-						_padding: Default::default(),
-					}]),
-				);
+			let flare = ship.get_outfits().get_flare_sprite(state.content);
+			if s.get_controls().thrust && flare.is_some() {
+				for engine_point in &ship_cnt.engines {
+					self.queue.write_buffer(
+						&self.global_uniform.object_buffer,
+						ObjectData::SIZE * self.vertex_buffers.object_counter as u64,
+						bytemuck::cast_slice(&[ObjectData {
+							xpos: engine_point.pos.x,
+							ypos: engine_point.pos.y - engine_point.size / 2.0,
+							zpos: 1.0,
+							angle: 0.0,
+							size: engine_point.size,
+							parent: idx as u32,
+							is_child: 1,
+							_padding: Default::default(),
+						}]),
+					);
 
-				// Enforce buffer limit
-				if self.vertex_buffers.object_counter as u64
-					> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
-				{
-					// TODO: no panic, handle this better.
-					panic!("Sprite limit exceeded!")
+					// Enforce buffer limit
+					if self.vertex_buffers.object_counter as u64
+						> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
+					{
+						// TODO: no panic, handle this better.
+						panic!("Sprite limit exceeded!")
+					}
+
+					self.queue.write_buffer(
+						&self.vertex_buffers.object.instances,
+						ObjectInstance::SIZE * self.vertex_buffers.object_counter,
+						bytemuck::cast_slice(&[ObjectInstance {
+							sprite_index: flare.unwrap().get_index(),
+							object_index: self.vertex_buffers.object_counter as u32,
+						}]),
+					);
+					self.vertex_buffers.object_counter += 1;
 				}
-
-				self.queue.write_buffer(
-					&self.vertex_buffers.object.instances,
-					ObjectInstance::SIZE * self.vertex_buffers.object_counter,
-					bytemuck::cast_slice(&[ObjectInstance {
-						sprite_index: flare.unwrap().get_index(),
-						object_index: self.vertex_buffers.object_counter as u32,
-					}]),
-				);
-				self.vertex_buffers.object_counter += 1;
 			}
 		}
 	}
@@ -136,69 +134,140 @@ impl GPUState {
 		state: &RenderState,
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
-		p: &ProjectileWorldObject,
 	) {
-		let r = state.world.get_rigid_body(p.rigid_body).unwrap();
-		let proj_pos = util::rigidbody_position(&r);
-		let proj_rot = util::rigidbody_rotation(r);
-		let proj_ang = -proj_rot.angle(Vector2 { x: 1.0, y: 0.0 });
-		let proj_cnt = &p.content; // TODO: don't clone this?
+		for p in state.world.iter_projectiles() {
+			let r = state.world.get_rigid_body(p.rigid_body).unwrap();
+			let proj_pos = util::rigidbody_position(&r);
+			let proj_rot = util::rigidbody_rotation(r);
+			let proj_ang = -proj_rot.angle(Vector2 { x: 1.0, y: 0.0 });
+			let proj_cnt = &p.content; // TODO: don't clone this?
 
-		// Position adjusted for parallax
-		// TODO: adjust parallax for zoom?
-		// 1.0 is z-coordinate, which is constant for ships
-		let pos: Point2<f32> = (proj_pos - state.camera_pos.to_vec()) / 1.0;
+			// Position adjusted for parallax
+			// TODO: adjust parallax for zoom?
+			// 1.0 is z-coordinate, which is constant for ships
+			let pos: Point2<f32> = (proj_pos - state.camera_pos.to_vec()) / 1.0;
 
-		// Game dimensions of this sprite post-scale.
-		// Post-scale width or height, whichever is larger.
-		// This is in game units.
-		//
-		// We take the maximum to account for rotated sprites.
-		let m = (proj_cnt.size / 1.0) * proj_cnt.sprite.aspect.max(1.0);
+			// Game dimensions of this sprite post-scale.
+			// Post-scale width or height, whichever is larger.
+			// This is in game units.
+			//
+			// We take the maximum to account for rotated sprites.
+			let m = (proj_cnt.size / 1.0) * proj_cnt.sprite.aspect.max(1.0);
 
-		// Don't draw sprites that are off the screen
-		if pos.x < screen_clip.0.x - m
-			|| pos.y > screen_clip.0.y + m
-			|| pos.x > screen_clip.1.x + m
-			|| pos.y < screen_clip.1.y - m
-		{
-			return;
+			// Don't draw sprites that are off the screen
+			if pos.x < screen_clip.0.x - m
+				|| pos.y > screen_clip.0.y + m
+				|| pos.x > screen_clip.1.x + m
+				|| pos.y < screen_clip.1.y - m
+			{
+				continue;
+			}
+
+			let idx = self.vertex_buffers.object_counter;
+			// Write this object's location data
+			self.queue.write_buffer(
+				&self.global_uniform.object_buffer,
+				ObjectData::SIZE * idx as u64,
+				bytemuck::cast_slice(&[ObjectData {
+					xpos: proj_pos.x,
+					ypos: proj_pos.y,
+					zpos: 1.0,
+					angle: proj_ang.0,
+					size: 0f32.max(proj_cnt.size + p.size_rng),
+					parent: 0,
+					is_child: 0,
+					_padding: Default::default(),
+				}]),
+			);
+
+			// Enforce buffer limit
+			if self.vertex_buffers.object_counter as u64
+				> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
+			{
+				// TODO: no panic, handle this better.
+				panic!("Sprite limit exceeded!")
+			}
+
+			// Push this object's instance
+			self.queue.write_buffer(
+				&self.vertex_buffers.object.instances,
+				ObjectInstance::SIZE * self.vertex_buffers.object_counter,
+				bytemuck::cast_slice(&[ObjectInstance {
+					sprite_index: proj_cnt.sprite.get_index(),
+					object_index: idx as u32,
+				}]),
+			);
+			self.vertex_buffers.object_counter += 1;
 		}
+	}
 
-		let idx = self.vertex_buffers.object_counter;
-		// Write this object's location data
-		self.queue.write_buffer(
-			&self.global_uniform.object_buffer,
-			ObjectData::SIZE * idx as u64,
-			bytemuck::cast_slice(&[ObjectData {
-				xpos: proj_pos.x,
-				ypos: proj_pos.y,
-				zpos: 1.0,
-				angle: proj_ang.0,
-				size: 0f32.max(proj_cnt.size + p.size_rng),
-				parent: 0,
-				is_child: 0,
-				_padding: Default::default(),
-			}]),
-		);
+	pub(super) fn world_push_system(
+		&mut self,
+		state: &RenderState,
+		// NE and SW corners of screen
+		screen_clip: (Point2<f32>, Point2<f32>),
+	) {
+		let system = state.content.get_system(state.current_system);
 
-		// Enforce buffer limit
-		if self.vertex_buffers.object_counter as u64
-			> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
-		{
-			// TODO: no panic, handle this better.
-			panic!("Sprite limit exceeded!")
+		for o in &system.objects {
+			// Position adjusted for parallax
+			let pos: Point2<f32> = (Point2 {
+				x: o.pos.x,
+				y: o.pos.y,
+			} - state.camera_pos.to_vec())
+				/ o.pos.z;
+
+			// Game dimensions of this sprite post-scale.
+			// Post-scale width or height, whichever is larger.
+			// This is in game units.
+			//
+			// We take the maximum to account for rotated sprites.
+			let m = (o.size / o.pos.z) * o.sprite.aspect.max(1.0);
+
+			// Don't draw sprites that are off the screen
+			if pos.x < screen_clip.0.x - m
+				|| pos.y > screen_clip.0.y + m
+				|| pos.x > screen_clip.1.x + m
+				|| pos.y < screen_clip.1.y - m
+			{
+				continue;
+			}
+
+			let idx = self.vertex_buffers.object_counter;
+			// Write this object's location data
+			self.queue.write_buffer(
+				&self.global_uniform.object_buffer,
+				ObjectData::SIZE * idx as u64,
+				bytemuck::cast_slice(&[ObjectData {
+					xpos: o.pos.x,
+					ypos: o.pos.y,
+					zpos: o.pos.z,
+					angle: o.angle.0,
+					size: o.size,
+					parent: 0,
+					is_child: 0,
+					_padding: Default::default(),
+				}]),
+			);
+
+			// Enforce buffer limit
+			if self.vertex_buffers.object_counter as u64
+				> galactica_constants::OBJECT_SPRITE_INSTANCE_LIMIT
+			{
+				// TODO: no panic, handle this better.
+				panic!("Sprite limit exceeded!")
+			}
+
+			// Push this object's instance
+			self.queue.write_buffer(
+				&self.vertex_buffers.object.instances,
+				ObjectInstance::SIZE * self.vertex_buffers.object_counter,
+				bytemuck::cast_slice(&[ObjectInstance {
+					sprite_index: o.sprite.get_index(),
+					object_index: idx as u32,
+				}]),
+			);
+			self.vertex_buffers.object_counter += 1;
 		}
-
-		// Push this object's instance
-		self.queue.write_buffer(
-			&self.vertex_buffers.object.instances,
-			ObjectInstance::SIZE * self.vertex_buffers.object_counter,
-			bytemuck::cast_slice(&[ObjectInstance {
-				sprite_index: proj_cnt.sprite.get_index(),
-				object_index: idx as u32,
-			}]),
-		);
-		self.vertex_buffers.object_counter += 1;
 	}
 }

crates/render/src/renderstate.rs

@@ -1,5 +1,5 @@
 use cgmath::Point2;
-use galactica_content::Content;
+use galactica_content::{Content, SystemHandle};
 use galactica_gameobject::{GameData, GameShipHandle};
 use galactica_world::{ParticleBuilder, World};
 
@@ -11,6 +11,9 @@ pub struct RenderState<'a> {
 	/// Player ship data
 	pub player_data: GameShipHandle,
 
+	/// The system we're currently in
+	pub current_system: SystemHandle,
+
 	/// Height of screen, in world units
 	pub camera_zoom: f32,
 

crates/world/src/behavior/mod.rs

@@ -1,12 +1,19 @@
 //! Various implementations of [`crate::ShipBehavior`]
 
 mod null;
-//mod point;
+mod point;
 
+use std::collections::HashMap;
+
+use galactica_gameobject::GameShipHandle;
 pub use null::*;
-//pub use point::Point;
+pub use point::Point;
+use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
 
-use crate::{objects::ShipControls, StepResources};
+use crate::{
+	objects::{ShipControls, ShipWorldObject},
+	StepResources,
+};
 
 /// Main behavior trait. Any struct that implements this
 /// may be used to control a ship.
@@ -14,5 +21,12 @@ pub trait ShipBehavior {
 	/// Update a ship's controls based on world state.
 	/// This method does not return anything, it modifies
 	/// the ship's controls in-place.
-	fn update_controls(&mut self, res: &StepResources) -> ShipControls;
+	fn update_controls(
+		&mut self,
+		res: &StepResources,
+		rigid_bodies: &RigidBodySet,
+		ships: &HashMap<GameShipHandle, ShipWorldObject>,
+		this_ship: RigidBodyHandle,
+		this_data: GameShipHandle,
+	) -> ShipControls;
 }

crates/world/src/behavior/null.rs

@@ -1,5 +1,13 @@
+use std::collections::HashMap;
+
+use galactica_gameobject::GameShipHandle;
+use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
+
 use super::ShipBehavior;
-use crate::{objects::ShipControls, StepResources};
+use crate::{
+	objects::{ShipControls, ShipWorldObject},
+	StepResources,
+};
 
 /// The Null behaviors is assigned to objects that are not controlled by the computer.
 /// Most notably, the player's ship has a Null behavior.
@@ -13,7 +21,14 @@ impl Null {
 }
 
 impl ShipBehavior for Null {
-	fn update_controls(&mut self, _res: &StepResources) -> ShipControls {
+	fn update_controls(
+		&mut self,
+		_res: &StepResources,
+		_rigid_bodies: &RigidBodySet,
+		_ships: &HashMap<GameShipHandle, ShipWorldObject>,
+		_this_ship: RigidBodyHandle,
+		_this_data: GameShipHandle,
+	) -> ShipControls {
 		ShipControls::new()
 	}
 }

crates/world/src/behavior/point.rs

@@ -1,9 +1,13 @@
 use cgmath::{Deg, InnerSpace};
-use galactica_gameobject::GameData;
+use rapier2d::dynamics::{RigidBodyHandle, RigidBodySet};
+use std::collections::HashMap;
 
+use crate::{
+	objects::{ShipControls, ShipWorldObject},
+	util, StepResources,
+};
 use galactica_content as content;
-
-use crate::World;
+use galactica_gameobject::GameShipHandle;
 
 use super::ShipBehavior;
 
@@ -21,43 +25,47 @@ impl Point {
 impl ShipBehavior for Point {
 	fn update_controls(
 		&mut self,
-		physics: &mut World,
-		content: &content::Content,
-		data: &GameData,
-	) {
-		// Turn off all controls
-		let s = physics.get_ship_mut(&self.handle).unwrap();
-		s.controls.left = false;
-		s.controls.right = false;
-		s.controls.guns = false;
-		s.controls.thrust = false;
+		res: &StepResources,
+		rigid_bodies: &RigidBodySet,
+		ships: &HashMap<GameShipHandle, ShipWorldObject>,
+		this_ship: RigidBodyHandle,
+		this_data: GameShipHandle,
+	) -> ShipControls {
+		let mut controls = ShipControls::new();
 
-		let (my_s, my_r) = physics.get_ship_body(self.handle).unwrap();
-		let my_data = data.get_ship(my_s.data_handle).unwrap();
-		let my_position = util::rigidbody_position(my_r);
-		let my_rotation = util::rigidbody_rotation(my_r);
-		let my_angvel = my_r.angvel();
-		let my_faction = content.get_faction(my_data.get_faction());
+		let this_rigidbody = rigid_bodies.get(this_ship).unwrap();
+		let my_data = res.dt.get_ship(this_data).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());
 
 		// Iterate all possible targets
-		let mut it = physics
-			.iter_ship_body()
-			.filter(|(s, _)| {
-				let data = data.get_ship(s.data_handle).unwrap();
-				match my_faction.relationships.get(&data.get_faction()).unwrap() {
-					content::Relationship::Hostile => true,
-					_ => false,
+		let mut hostile_ships = ships
+			.values()
+			.filter(|s| {
+				let data = res.dt.get_ship(s.data_handle);
+				if let Some(data) = data {
+					match my_faction.relationships.get(&data.get_faction()).unwrap() {
+						content::Relationship::Hostile => true,
+						_ => 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(|(_, r)| r);
+			.map(|s| rigid_bodies.get(s.rigid_body).unwrap());
 
 		// Find the closest target
-		let mut closest_enemy_position = match it.next() {
+		let mut closest_enemy_position = match hostile_ships.next() {
 			Some(c) => util::rigidbody_position(c),
-			None => return, // Do nothing if no targets are available
+			None => return controls, // Do nothing if no targets are available
 		};
+
 		let mut d = (my_position - closest_enemy_position).magnitude();
-		for r in it {
+		for r in hostile_ships {
 			let p = util::rigidbody_position(r);
 			let new_d = (my_position - p).magnitude();
 			if new_d < d {
@@ -70,17 +78,13 @@ impl ShipBehavior for Point {
 			.angle(closest_enemy_position - my_position)
 			.into();
 
-		let s = physics.get_ship_mut(&self.handle).unwrap();
-		s.controls.left = false;
-		s.controls.right = false;
-
 		if angle_delta < Deg(0.0) && my_angvel > -0.3 {
-			s.controls.right = true;
+			controls.right = true;
 		} else if angle_delta > Deg(0.0) && my_angvel < 0.3 {
-			s.controls.left = true;
+			controls.left = true;
 		}
 
-		s.controls.guns = true;
-		s.controls.thrust = false;
+		controls.guns = true;
+		return controls;
 	}
 }

crates/world/src/objects/ship.rs

@@ -1,7 +1,6 @@
 use cgmath::{Deg, EuclideanSpace, InnerSpace, Matrix2, Rad, Vector2, Zero};
 use content::{FactionHandle, ShipHandle};
 use nalgebra::{point, vector};
-
 use object::GameShipHandle;
 use rand::{rngs::ThreadRng, Rng};
 use rapier2d::{
@@ -9,7 +8,7 @@ use rapier2d::{
 	geometry::{Collider, ColliderHandle},
 };
 
-use crate::{behavior::ShipBehavior, util, ParticleBuilder, StepResources};
+use crate::{util, ParticleBuilder, StepResources};
 use galactica_content as content;
 use galactica_gameobject as object;
 
@@ -41,6 +40,7 @@ impl ShipControls {
 	}
 }
 
+#[derive(Debug)]
 struct ShipCollapseSequence {
 	total_length: f32,
 	time_elapsed: f32,
@@ -181,6 +181,7 @@ impl ShipCollapseSequence {
 }
 
 /// A ship instance in the physics system
+#[derive(Debug)]
 pub struct ShipWorldObject {
 	/// This ship's physics handle
 	pub rigid_body: RigidBodyHandle,
@@ -194,9 +195,6 @@ pub struct ShipWorldObject {
 	/// This ship's controls
 	pub(crate) controls: ShipControls,
 
-	/// This ship's behavior
-	behavior: Box<dyn ShipBehavior>,
-
 	/// This ship's collapse sequence
 	collapse_sequence: ShipCollapseSequence,
 
@@ -209,10 +207,9 @@ pub struct ShipWorldObject {
 
 impl ShipWorldObject {
 	/// Make a new ship
-	pub fn new(
+	pub(crate) fn new(
 		ct: &content::Content,
 		data_handle: GameShipHandle,
-		behavior: Box<dyn ShipBehavior>,
 		faction: FactionHandle,
 		rigid_body: RigidBodyHandle,
 		collider: ColliderHandle,
@@ -222,18 +219,12 @@ impl ShipWorldObject {
 			rigid_body,
 			collider,
 			data_handle,
-			behavior,
 			controls: ShipControls::new(),
 			faction,
 			collapse_sequence: ShipCollapseSequence::new(ship_content.collapse.length),
 		}
 	}
 
-	/// Compute this ship's controls using its behavior
-	pub fn update_controls(&mut self, res: &StepResources) {
-		self.controls = self.behavior.update_controls(res);
-	}
-
 	/// If this is true, remove this ship from the physics system.
 	pub fn should_be_removed(&self) -> bool {
 		self.collapse_sequence.is_done()

crates/world/src/world.rs

@@ -12,7 +12,8 @@ use rapier2d::{
 use std::{collections::HashMap, f32::consts::PI};
 
 use crate::{
-	behavior, objects,
+	behavior::{self, ShipBehavior},
+	objects,
 	objects::{ProjectileWorldObject, ShipWorldObject},
 	util,
 	wrapper::Wrapper,
@@ -29,6 +30,7 @@ pub struct World {
 	wrapper: Wrapper,
 	projectiles: HashMap<ColliderHandle, objects::ProjectileWorldObject>,
 	ships: HashMap<GameShipHandle, objects::ShipWorldObject>,
+	ship_behaviors: HashMap<GameShipHandle, Box<dyn ShipBehavior>>,
 	collider_ship_table: HashMap<ColliderHandle, GameShipHandle>,
 
 	collision_handler: ChannelEventCollector,
@@ -79,6 +81,7 @@ impl<'a> World {
 			true,
 		);
 		let h = self.collider_ship_table.remove(&s.collider).unwrap();
+		self.ship_behaviors.remove(&h);
 		self.ships.remove(&h);
 	}
 
@@ -177,6 +180,7 @@ impl World {
 			wrapper: Wrapper::new(),
 			projectiles: HashMap::new(),
 			ships: HashMap::new(),
+			ship_behaviors: HashMap::new(),
 			collider_ship_table: HashMap::new(),
 			collision_handler: ChannelEventCollector::new(collision_send, contact_force_send),
 			collision_queue,
@@ -227,16 +231,11 @@ impl World {
 		);
 
 		self.collider_ship_table.insert(c, ship.get_handle());
+		self.ship_behaviors
+			.insert(ship.get_handle(), Box::new(behavior::Point::new()));
 		self.ships.insert(
 			ship.get_handle(),
-			objects::ShipWorldObject::new(
-				ct,
-				ship.get_handle(),
-				Box::new(behavior::Null::new()),
-				ship.get_faction(),
-				r,
-				c,
-			),
+			objects::ShipWorldObject::new(ct, ship.get_handle(), ship.get_faction(), r, c),
 		);
 	}
 
@@ -245,25 +244,57 @@ impl World {
 	/// - applies ship controls
 	/// - creates projectiles
 	fn step_ships(&mut self, res: &mut StepResources) {
+		// 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 (_, ship_object) in &mut self.ships {
+		for (_, handle) in &self.collider_ship_table {
+			// 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);
 				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);
+			// Short-circuit continue if this ship isn't in game data
+			// (which means it's playing a collapse sequence)
+			if res.dt.get_ship(*handle).is_none() {
+				let ship_object = self.ships.get_mut(handle).unwrap();
+				ship_object.step(
+					res,
+					&mut self.wrapper.rigid_body_set[ship_object.rigid_body],
+					&mut self.wrapper.collider_set[ship_object.collider],
+				);
+				continue;
 			}
 
-			// TODO: unified step info struct
-			ship_object.step(res, rigid_body, collider);
+			// Compute new controls
+			let controls;
+			if ship_object.data_handle == res.player {
+				controls = res.player_controls.clone();
+			} else {
+				let b = self.ship_behaviors.get_mut(handle).unwrap();
+				controls = b.update_controls(
+					&res,
+					&self.wrapper.rigid_body_set,
+					&self.ships,
+					ship_object.rigid_body,
+					*handle,
+				);
+			}
+
+			// Now re-borrow mutably to apply changes
+			let ship_object = self.ships.get_mut(handle).unwrap();
+			ship_object.controls = controls;
+			ship_object.step(
+				res,
+				&mut self.wrapper.rigid_body_set[ship_object.rigid_body],
+				&mut self.wrapper.collider_set[ship_object.collider],
+			);
+
+			// If we're firing, try to fire each gun
 			if ship_object.controls.guns {
 				let ship_data = res.dt.get_ship_mut(ship_object.data_handle).unwrap();