Add chapter: 18

src/inventory_system.rs

@@ -1,6 +1,7 @@
 use specs::prelude::*;
 
 use crate::gamelog::GameLog;
+use crate::particle_system::ParticleBuilder;
 use crate::{
     AreaOfEffect, CombatStats, Confusion, Consumable, Equippable, Equipped, InBackpack,
     InflictsDamage, Map, Name, Position, ProvidesHealing, Ranged, SufferDamage, WantsToDropItem,
@@ -69,6 +70,8 @@ impl<'a> System<'a> for ItemUseSystem {
         ReadStorage<'a, Equippable>,
         WriteStorage<'a, Equipped>,
         WriteStorage<'a, InBackpack>,
+        WriteExpect<'a, ParticleBuilder>,
+        ReadStorage<'a, Position>,
     );
 
     fn run(&mut self, data: Self::SystemData) {
@@ -90,6 +93,8 @@ impl<'a> System<'a> for ItemUseSystem {
             equippable,
             mut equipped,
             mut backpack,
+            mut particle_builder,
+            positions,
         ) = data;
 
         for (entity, use_item) in (&entities, &wants_use).join() {
@@ -118,8 +123,17 @@ impl<'a> System<'a> for ItemUseSystem {
                                 for mob in map.tile_content[idx].iter() {
                                     targets.push(*mob);
                                 }
+
+                                particle_builder.request(
+                                    tile_idx.x,
+                                    tile_idx.y,
+                                    rltk::RGB::named(rltk::ORANGE),
+                                    rltk::RGB::named(rltk::BLACK),
+                                    rltk::to_cp437('░'),
+                                    200.,
+                                );
                             }
-                        }
+
                     }
                 }
             }
@@ -172,6 +186,17 @@ impl<'a> System<'a> for ItemUseSystem {
                             "You use {} on {}, inflicting {} hp.",
                             item_name.name, mob_name.name, item_damages.damage
                         ));
+
+                        if let Some(pos) = positions.get(*mob) {
+                            particle_builder.request(
+                                pos.x,
+                                pos.y,
+                                rltk::RGB::named(rltk::RED),
+                                rltk::RGB::named(rltk::BLACK),
+                                rltk::to_cp437('‼'),
+                                200.,
+                            );
+                        }
                     }
 
                     used_item = true;
@@ -192,6 +217,16 @@ impl<'a> System<'a> for ItemUseSystem {
                             ));
                         }
                         used_item = true;
+                        if let Some(pos) = positions.get(*target) {
+                            particle_builder.request(
+                                pos.x,
+                                pos.y,
+                                rltk::RGB::named(rltk::GREEN),
+                                rltk::RGB::named(rltk::BLACK),
+                                rltk::to_cp437('♥'),
+                                200.,
+                            );
+                        }
                     }
                 }
             }
@@ -209,6 +244,17 @@ impl<'a> System<'a> for ItemUseSystem {
                                 "You use {} on {}, confusing them.",
                                 item_name.name, mob_name.name
                             ));
+
+                            if let Some(pos) = positions.get(*mob) {
+                                particle_builder.request(
+                                    pos.x,
+                                    pos.y,
+                                    rltk::RGB::named(rltk::MAGENTA),
+                                    rltk::RGB::named(rltk::BLACK),
+                                    rltk::to_cp437('?'),
+                                    200.,
+                                );
+                            }
                         }
                     }
                 }