Complete section 3.3

src/monster_ai_system.rs

@@ -1,7 +1,6 @@
 use crate::components::{Confusion, Monster, Position, Viewshed, WantsToMelee};
-use crate::{Map, RunState};
-
-use rltk::Point;
+use crate::{particle_system::ParticleBuilder, Map, RunState};
+use rltk::{Point, RGB};
 use specs::prelude::*;
 
 pub struct MonsterAI {}
@@ -19,6 +18,7 @@ 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) {
@@ -33,6 +33,7 @@ impl<'a> System<'a> for MonsterAI {
             mut position,
             mut wants_to_melee,
             mut confused,
+            mut particle_builder,
         ) = data;
 
         if *runstate != RunState::MonsterTurn {
@@ -52,6 +53,15 @@ impl<'a> System<'a> for MonsterAI {
                 }
 
                 can_act = false;
+
+                particle_builder.request(
+                    pos.x,
+                    pos.y,
+                    RGB::named(rltk::MAGENTA),
+                    RGB::named(rltk::BLACK),
+                    rltk::to_cp437('?'),
+                    200.0,
+                );
             }
 
             if can_act {