Kill Fish When They Fall Out of Bounds

src/game/camera.rs

@@ -1,8 +1,11 @@
+use macroquad::prelude::collections::storage;
 use macroquad::prelude::*;
 use macroquad::rand::gen_range;
 
 use core::noise::NoiseGenerator;
 
+use crate::map::Map;
+
 struct Shake {
     direction: (f32, f32),
     kind: ShakeType,
@@ -49,7 +52,25 @@ impl GameCamera {
     }
 
     pub fn add_player_rect(&mut self, rect: Rect) {
-        self.player_rects.push(rect);
+        let map = storage::get::<Map>();
+        let playable = map.get_playable_area();
+        if playable.overlaps(&rect) {
+            self.player_rects.push(rect);
+
+        // We don't want to try to follow the player out of the playable area, so set the
+        // effective player rect to the closest spot to the player that is still touching the
+        // playable area.
+        } else {
+            let min = Vec2::new(playable.x, playable.y);
+            let max = min + Vec2::new(playable.w, playable.h);
+
+            self.player_rects.push(Rect::new(
+                rect.x.max(min.x).min(max.x),
+                rect.y.max(min.y).min(max.y),
+                rect.w,
+                rect.h,
+            ));
+        }
     }
 }
 

src/game/mod.rs

@@ -36,7 +36,7 @@ use crate::effects::active::triggered::{fixed_update_triggered_effects, update_t
 use crate::items::spawn_item;
 use crate::map::{
     debug_draw_fish_schools, fixed_update_sproingers, spawn_crab, spawn_decoration,
-    spawn_fish_school, spawn_sproinger, update_crabs, update_fish_schools,
+    spawn_fish_school, spawn_sproinger, update_crabs, update_fish_schools, update_map_kill_zone,
 };
 use crate::network::{
     fixed_update_network_client, fixed_update_network_host, update_network_client,
@@ -118,6 +118,7 @@ impl Game {
 
         if matches!(mode, GameMode::Local | GameMode::NetworkHost) {
             updates_builder
+                .add_system(update_map_kill_zone)
                 .add_system(update_player_states)
                 .add_system(update_player_inventory)
                 .add_system(update_player_passive_effects)

src/map/mod.rs

@@ -7,11 +7,13 @@ use serde::{Deserialize, Serialize};
 mod crab;
 mod decoration;
 mod fish_school;
+mod player_interaction;
 mod sproinger;
 
 pub use crab::*;
 pub use decoration::*;
 pub use fish_school::*;
+pub use player_interaction::*;
 pub use sproinger::*;
 
 use core::math::URect;
@@ -24,6 +26,10 @@ use crate::{
     Resources,
 };
 
+/// The ammount of space above the map that the player can be without being killed
+const EXTRA_PLAYABLE_SKY: f32 = 200.0;
+const EXTRA_PLAYABLE_WIDTH: f32 = 400.0;
+
 pub type MapProperty = core::json::GenericParam;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -116,6 +122,19 @@ impl Map {
         )
     }
 
+    /// Get the playable map area.
+    ///
+    /// Any player that doesn't overlap the play area will be killed.
+    pub fn get_playable_area(&self) -> Rect {
+        let size = self.get_size();
+        Rect::new(
+            self.world_offset.x - EXTRA_PLAYABLE_WIDTH / 2.0,
+            self.world_offset.y - EXTRA_PLAYABLE_SKY,
+            size.x + EXTRA_PLAYABLE_WIDTH,
+            size.y + EXTRA_PLAYABLE_SKY,
+        )
+    }
+
     pub fn contains(&self, position: Vec2) -> bool {
         let map_size = self.grid_size.as_f32() * self.tile_size;
         let rect = Rect::new(

src/map/player_interaction.rs

@@ -0,0 +1,30 @@
+use core::Transform;
+
+use hecs::World;
+use macroquad::prelude::collections::storage;
+
+use crate::{
+    player::{Player, PlayerState},
+    PhysicsBody,
+};
+
+use super::Map;
+
+pub fn update_map_kill_zone(world: &mut World) {
+    let map = storage::get::<Map>();
+
+    for (_, (player, transform, body)) in world
+        .query::<(&mut Player, &Transform, &PhysicsBody)>()
+        .iter()
+    {
+        let player: &mut Player = player;
+        let transform: &Transform = transform;
+        let body: &PhysicsBody = body;
+
+        let player_rect = body.as_rect(transform.position);
+
+        if !map.get_playable_area().overlaps(&player_rect) {
+            player.state = PlayerState::Dead;
+        }
+    }
+}