Add chapter: 18

src/monster_ai_system.rs

@@ -3,9 +3,10 @@ use specs::prelude::*;
 
 use crate::{
     components::{Monster, Position, Viewshed, WantsToMelee},
-    map::Map,
-    Confusion, RunState,
+    Confusion,
+    map::Map, RunState,
 };
+use crate::particle_system::ParticleBuilder;
 
 pub struct MonsterAI {}
 
@@ -22,6 +23,7 @@ impl<'a> System<'a> for MonsterAI {
         WriteStorage<'a, Position>,
         WriteStorage<'a, WantsToMelee>,
         WriteStorage<'a, Confusion>,
+        WriteExpect<'a, ParticleBuilder>
     );
 
     fn run(&mut self, data: Self::SystemData) {
@@ -36,6 +38,7 @@ impl<'a> System<'a> for MonsterAI {
             mut position,
             mut wants_to_melee,
             mut confused,
+            mut particle_builder
         ) = data;
 
         if *runstate != RunState::MonsterTurn {
@@ -43,7 +46,7 @@ impl<'a> System<'a> for MonsterAI {
         }
 
         for (entity, mut viewshed, _monster, mut pos) in
-            (&entities, &mut viewshed, &monster, &mut position).join()
+        (&entities, &mut viewshed, &monster, &mut position).join()
         {
             let mut can_act = true;
 
@@ -53,6 +56,8 @@ impl<'a> System<'a> for MonsterAI {
                     confused.remove(entity);
                 }
                 can_act = false;
+
+                particle_builder.request(pos.x, pos.y, rltk::RGB::named(rltk::MAGENTA), rltk::RGB::named(rltk::BLACK), rltk::to_cp437('?'), 200.);
             }
 
             if !can_act {