Switch from specs to hecs

src/systems/whip.rs

@@ -0,0 +1,115 @@
+use std::time::{Duration, Instant};
+
+use bracket_lib::prelude::*;
+use hecs::{Entity, World};
+
+use crate::{
+    components::{monster::damage_for_kind, Monster, Position, WantsToWhip},
+    resources::Resources,
+};
+
+pub fn run(world: &mut World, resources: &mut Resources) {
+    let mut to_kill: Vec<Entity> = Vec::new();
+    let mut to_remove: Vec<Entity> = Vec::new();
+
+    for (entity, (position, mut wants_to_whip)) in
+        &mut world.query::<(&Position, &mut WantsToWhip)>()
+    {
+        resources.stop_clock = true;
+        let now = Instant::now();
+        if now - wants_to_whip.last_frame > Duration::from_secs_f32(0.1) {
+            let destination = loop {
+                let destination = match wants_to_whip.frame {
+                    0 => Some(Point {
+                        x: position.x - 1,
+                        y: position.y - 1,
+                    }),
+                    1 => Some(Point {
+                        x: position.x - 1,
+                        y: position.y,
+                    }),
+                    2 => Some(Point {
+                        x: position.x - 1,
+                        y: position.y + 1,
+                    }),
+                    3 => Some(Point {
+                        x: position.x,
+                        y: position.y + 1,
+                    }),
+                    4 => Some(Point {
+                        x: position.x + 1,
+                        y: position.y + 1,
+                    }),
+                    5 => Some(Point {
+                        x: position.x + 1,
+                        y: position.y,
+                    }),
+                    6 => Some(Point {
+                        x: position.x + 1,
+                        y: position.y - 1,
+                    }),
+                    7 => Some(Point {
+                        x: position.x,
+                        y: position.y - 1,
+                    }),
+                    _ => None,
+                };
+
+                if let Some(dest) = destination {
+                    if resources.map.in_bounds(dest) {
+                        break destination;
+                    }
+                    wants_to_whip.frame += 1;
+                    if wants_to_whip.frame > 7 {
+                        break None;
+                    }
+                }
+            };
+
+            if let Some(dest) = destination {
+                if let Some(e) = resources.map.get_tile_content_at(dest) {
+                    if let Ok(monster) = world.get::<Monster>(e) {
+                        resources.stats.add_score(damage_for_kind(monster.kind));
+                        to_kill.push(e);
+                        resources.map.clear_tile_content_at(dest);
+                        if let Some(sound) = &mut wants_to_whip.sound {
+                            sound.control::<oddio::Stop<_>, _>().stop();
+                        }
+                        if wants_to_whip.frame == 7 {
+                            wants_to_whip.sound = None;
+                            resources
+                                .sound_output
+                                .play_sound(resources.sound_effects.whipping_hit_end.clone());
+                        } else {
+                            wants_to_whip.sound = Some(
+                                resources
+                                    .sound_output
+                                    .play_sound(resources.sound_effects.whipping_hit.clone()),
+                            );
+                        }
+                    }
+                }
+            }
+
+            if wants_to_whip.frame < 7 {
+                wants_to_whip.frame += 1;
+                wants_to_whip.last_frame = now;
+            } else {
+                to_remove.push(entity);
+                resources.stop_clock = false;
+                if let Some(sound) = &mut wants_to_whip.sound {
+                    sound.control::<oddio::Stop<_>, _>().stop();
+                    wants_to_whip.sound = None;
+                }
+            }
+        }
+    }
+
+    for e in to_kill {
+        let _ = world.despawn(e);
+    }
+
+    for e in to_remove {
+        let _ = world.remove_one::<WantsToWhip>(e);
+    }
+}