Fixed system rendering

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

@@ -157,10 +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/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,
@@ -19,8 +16,8 @@ impl GPUState {
 		state: &RenderState,
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
-		s: &ShipWorldObject,
 	) {
+		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);
@@ -45,7 +42,7 @@ impl GPUState {
 				|| pos.x > screen_clip.1.x + m
 				|| pos.y < screen_clip.1.y - m
 			{
-			return;
+				continue;
 			}
 
 			let idx = self.vertex_buffers.object_counter;
@@ -88,7 +85,7 @@ impl GPUState {
 			// (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,
+				None => continue,
 				Some(s) => s,
 			};
 
@@ -130,14 +127,15 @@ impl GPUState {
 				}
 			}
 		}
+	}
 
 	pub(super) fn world_push_projectile(
 		&mut self,
 		state: &RenderState,
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
-		p: &ProjectileWorldObject,
 	) {
+		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);
@@ -162,7 +160,7 @@ impl GPUState {
 				|| pos.x > screen_clip.1.x + m
 				|| pos.y < screen_clip.1.y - m
 			{
-			return;
+				continue;
 			}
 
 			let idx = self.vertex_buffers.object_counter;
@@ -201,4 +199,75 @@ impl GPUState {
 			);
 			self.vertex_buffers.object_counter += 1;
 		}
+	}
+
+	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);
+
+		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;
+		}
+	}
 }

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,