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remove_tiles.rs
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remove_tiles.rs
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use bevy::prelude::*;
use bevy_ecs_tilemap::prelude::*;
use rand::{thread_rng, Rng};
mod helpers;
fn startup(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.spawn(Camera2dBundle::default());
let texture_handle: Handle<Image> = asset_server.load("tiles.png");
let map_size = TilemapSize { x: 32, y: 32 };
let mut tile_storage = TileStorage::empty(map_size);
let tilemap_entity = commands.spawn_empty().id();
for x in 0..32u32 {
for y in 0..32u32 {
let tile_pos = TilePos { x, y };
let tile_entity = commands
.spawn(TileBundle {
position: tile_pos,
tilemap_id: TilemapId(tilemap_entity),
..Default::default()
})
.id();
tile_storage.set(&tile_pos, tile_entity);
}
}
let tile_size = TilemapTileSize { x: 16.0, y: 16.0 };
let grid_size = tile_size.into();
let map_type = TilemapType::default();
commands.entity(tilemap_entity).insert((
TilemapBundle {
grid_size,
map_type,
size: map_size,
storage: tile_storage,
texture: TilemapTexture::Single(texture_handle),
tile_size,
transform: get_tilemap_center_transform(&map_size, &grid_size, &map_type, 0.0),
..Default::default()
},
LastUpdate::default(),
));
}
#[derive(Default, Component)]
struct LastUpdate {
value: f64,
}
fn remove_tiles(
mut commands: Commands,
time: Res<Time>,
mut last_update_query: Query<(&mut LastUpdate, &mut TileStorage)>,
) {
let current_time = time.elapsed_seconds_f64();
for (mut last_update, mut tile_storage) in last_update_query.iter_mut() {
// Remove a tile every half second.
if (current_time - last_update.value) > 0.1 {
let mut random = thread_rng();
let position = TilePos {
x: random.gen_range(0..32),
y: random.gen_range(0..32),
};
if let Some(tile_entity) = tile_storage.get(&position) {
commands.entity(tile_entity).despawn_recursive();
// Don't forget to remove tiles from the tile storage!
tile_storage.remove(&position);
}
last_update.value = current_time;
}
}
}
fn main() {
App::new()
.add_plugins(
DefaultPlugins
.set(WindowPlugin {
primary_window: Some(Window {
title: String::from("Remove Tiles Example"),
..Default::default()
}),
..default()
})
.set(ImagePlugin::default_nearest()),
)
.add_plugins(TilemapPlugin)
.add_systems(Startup, startup)
.add_systems(Update, helpers::camera::movement)
.add_systems(Update, remove_tiles)
.run();
}