Create systems module, and move the Specs systems there

src/effects/particles.rs

@@ -3,7 +3,7 @@ use ::specs::prelude::*;
 use super::{EffectSpawner, EffectType};
 use crate::components::{ParticleAnimation, ParticleLifetime, Position, Renderable};
 use crate::map::Map;
-use crate::particle_system::ParticleBuilder;
+use crate::systems::particle_system::ParticleBuilder;
 
 pub fn particle_to_tile(ecs: &mut World, tile_idx: i32, effect: &EffectSpawner) {
     if let EffectType::Particle {

src/gui/hud.rs

@@ -105,13 +105,13 @@ pub fn map_label(ecs: &World, draw_batch: &mut DrawBatch) {
         to_cp437('┤'),
     );
     draw_batch.set(
-        Point::new(x_pos + name_length as i32, 0),
+        Point::new(x_pos + name_length as i32 + 1, 0),
         ColorPair::new(colors::BOX_GRAY, colors::BLACK),
         to_cp437('├'),
     );
     draw_batch.print_color(
         Point::new(x_pos + 1, 0),
-        &map.name,
+        &format!(" {} ", map.name),
         ColorPair::new(colors::WHITE, colors::BLACK),
     );
 }

src/main.rs

@@ -4,7 +4,6 @@
 #[macro_use]
 extern crate lazy_static;
 
-mod ai;
 mod colors;
 mod components;
 mod damage_system;
@@ -12,18 +11,10 @@ mod effects;
 mod gamelog;
 mod gamesystem;
 mod gui;
-mod hunger_system;
-mod inventory_system;
-mod lighting_system;
 mod map;
 pub mod map_builders;
-mod map_indexing_system;
-mod melee_combat_system;
-mod movement_system;
-mod particle_system;
 mod player;
 mod random_table;
-mod ranged_combat_system;
 mod raws;
 mod rect;
 mod rex_assets;
@@ -31,8 +22,7 @@ mod saveload_system;
 mod spatial;
 mod spawner;
 mod state;
-mod trigger_system;
-mod visibility_system;
+mod systems;
 
 use ::specs::prelude::*;
 use ::specs::saveload::{SimpleMarker, SimpleMarkerAllocator};
@@ -164,6 +154,7 @@ fn register_components(state: &mut State) {
 /// * Generates the first [`map`](crate::state::State::generate_world_map)
 fn init_state() -> State {
     use ::rltk::{Point, RandomNumberGenerator};
+    use systems::particle_system::ParticleBuilder;
 
     let mut state = State::new();
 
@@ -184,7 +175,7 @@ fn init_state() -> State {
     state.ecs.insert(player_entity);
 
     state.ecs.insert(RunState::MapGeneration {});
-    state.ecs.insert(particle_system::ParticleBuilder::new());
+    state.ecs.insert(ParticleBuilder::new());
     state.ecs.insert(rex_assets::RexAssets::new());
 
     state.generate_world_map(1, 0);

src/state.rs

@@ -4,25 +4,16 @@ use ::specs::prelude::*;
 
 use crate::components::*;
 use crate::gui::{self, show_cheat_mode, CheatMenuResult, MainMenuSelection};
-use crate::hunger_system::HungerSystem;
-use crate::inventory_system::{
-    ItemCollectionSystem, ItemDropSystem, ItemEquipOnUse, ItemIdentificationSystem,
-    ItemRemoveSystem, ItemUseSystem, SpellUseSystem,
-};
-use crate::lighting_system::LightingSystem;
 use crate::map::{self, *};
-use crate::map_indexing_system::MapIndexingSystem;
-use crate::melee_combat_system::MeleeCombatSystem;
-use crate::movement_system::MovementSystem;
-use crate::particle_system::{self, ParticleSpawnSystem};
 use crate::player::*;
-use crate::ranged_combat_system::RangedCombatSystem;
 use crate::raws::*;
-use crate::trigger_system::TriggerSystem;
-use crate::visibility_system::VisibilitySystem;
-use crate::{
-    ai, camera, colors, damage_system, effects, gamelog, player, saveload_system, spawner,
+use crate::systems::{
+    ai, particle_system, HungerSystem, ItemCollectionSystem, ItemDropSystem, ItemEquipOnUse,
+    ItemIdentificationSystem, ItemRemoveSystem, ItemUseSystem, LightingSystem, MapIndexingSystem,
+    MeleeCombatSystem, MovementSystem, ParticleSpawnSystem, RangedCombatSystem, SpellUseSystem,
+    TriggerSystem, VisibilitySystem,
 };
+use crate::{camera, colors, damage_system, effects, gamelog, player, saveload_system, spawner};
 
 /// Whether to show a visual representation of map generation
 pub const SHOW_MAPGEN_VISUALIZER: bool = false;

src/systems.rs

@@ -0,0 +1,32 @@
+mod dispatcher;
+pub use dispatcher::UnifiedDispatcher;
+
+// Systems
+pub mod ai;
+mod hunger_system;
+mod inventory_system;
+mod lighting_system;
+mod map_indexing_system;
+mod melee_combat_system;
+mod movement_system;
+pub mod particle_system;
+mod ranged_combat_system;
+mod trigger_system;
+mod visibility_system;
+
+// System imports
+pub use ai::*;
+pub use hunger_system::HungerSystem;
+pub use inventory_system::*;
+pub use lighting_system::LightingSystem;
+pub use map_indexing_system::MapIndexingSystem;
+pub use melee_combat_system::MeleeCombatSystem;
+pub use movement_system::MovementSystem;
+pub use particle_system::ParticleSpawnSystem;
+pub use ranged_combat_system::RangedCombatSystem;
+pub use trigger_system::TriggerSystem;
+pub use visibility_system::VisibilitySystem;
+
+pub fn build() -> Box<dyn UnifiedDispatcher + 'static> {
+    dispatcher::new()
+}

src/systems/dispatcher.rs

@@ -0,0 +1,44 @@
+#[macro_use]
+mod single_thread;
+
+use ::specs::prelude::World;
+pub use single_thread::*;
+
+use super::*;
+
+pub trait UnifiedDispatcher {
+    fn run_now(&mut self, ecs: *mut World);
+}
+
+construct_dispatcher!(
+    (MapIndexingSystem, "map_index", &[]),
+    (VisibilitySystem, "visibility", &[]),
+    (EncumbranceSystem, "encumbrance", &[]),
+    (InitiativeSystem, "initiative", &[]),
+    (TurnStatusSystem, "turnstatus", &[]),
+    (QuipSystem, "quips", &[]),
+    (AdjacentAI, "adjacent", &[]),
+    (VisibleAI, "visible", &[]),
+    (ApproachAI, "approach", &[]),
+    (FleeAI, "flee", &[]),
+    (ChaseAI, "chase", &[]),
+    (DefaultMoveAI, "default_move", &[]),
+    (MovementSystem, "movement", &[]),
+    (TriggerSystem, "triggers", &[]),
+    (MeleeCombatSystem, "melee", &[]),
+    (RangedCombatSystem, "ranged", &[]),
+    (ItemCollectionSystem, "pickup", &[]),
+    (ItemEquipOnUse, "equip", &[]),
+    (ItemUseSystem, "use", &[]),
+    (SpellUseSystem, "spells", &[]),
+    (ItemIdentificationSystem, "itemid", &[]),
+    (ItemDropSystem, "drop", &[]),
+    (ItemRemoveSystem, "remove", &[]),
+    (HungerSystem, "hunger", &[]),
+    (ParticleSpawnSystem, "particle_spawn", &[]),
+    (LightingSystem, "lighting", &[])
+);
+
+pub fn new() -> Box<dyn UnifiedDispatcher + 'static> {
+    new_dispatch()
+}

src/systems/dispatcher/single_thread.rs

@@ -0,0 +1,43 @@
+use ::specs::prelude::*;
+
+use super::super::*;
+use super::UnifiedDispatcher;
+
+macro_rules! construct_dispatcher {
+    (
+        $(
+            (
+                $type:ident,
+                $name:expr,
+                $deps:expr
+            )
+        ),*
+    ) => {
+        fn new_dispatch() -> Box<dyn UnifiedDispatcher + 'static> {
+            let mut dispatch = SingleThreadedDispatcher {
+                systems: Vec::new()
+            };
+
+            $(
+                dispatch.systems.push(Box::new( $type {} ));
+            )*
+
+            return Box::new(dispatch);
+        }
+    }
+}
+
+pub struct SingleThreadedDispatcher<'a> {
+    pub systems: Vec<Box<dyn RunNow<'a>>>,
+}
+
+impl<'a> UnifiedDispatcher for SingleThreadedDispatcher<'a> {
+    fn run_now(&mut self, ecs: *mut World) {
+        unsafe {
+            for sys in self.systems.iter_mut() {
+                sys.run_now(&*ecs);
+            }
+            crate::effects::run_effects_queue(&mut *ecs);
+        }
+    }
+}

src/systems/lighting_system.rs

@@ -2,8 +2,8 @@ use ::rltk::Point;
 use ::specs::prelude::*;
 use rltk::DistanceAlg;
 
-use super::{LightSource, Map, Position, Viewshed};
-use crate::colors;
+use crate::components::{LightSource, Position, Viewshed};
+use crate::{colors, Map};
 
 pub struct LightingSystem {}