Struct UtilitySystems 

pub struct UtilitySystems;

实用系统

提供常用的实用系统实现。

Implementations

impl UtilitySystems

pub fn time_update_system(time: ResMut<'_, Time>)

时间更新系统

更新全局时间资源。

示例

use anvilkit_ecs::prelude::*;
use anvilkit_ecs::schedule::AnvilKitSchedule;

let mut app = App::new();
app.add_systems(AnvilKitSchedule::PreUpdate, UtilitySystems::time_update_system);

pub fn visibility_filter_system( query: Query<'_, '_, (Entity, &mut Visibility, Option<&Parent>), (With<Transform>, Changed<Visibility>)>, )

可见性过滤系统

根据可见性组件过滤实体的处理。

示例

use anvilkit_ecs::prelude::*;
 
fn render_system(query: Query<&Transform, With<Visibility>>) {
    // 只处理可见的实体
    for transform in &query {
        // 渲染逻辑
    }
}

pub fn layer_sorting_system( query: Query<'_, '_, (Entity, &Layer), Changed<Layer>>, )

层级排序系统

根据层级组件对实体进行排序处理。

示例

use anvilkit_ecs::prelude::*;
use anvilkit_ecs::schedule::AnvilKitSchedule;

let mut app = App::new();
app.add_systems(AnvilKitSchedule::PostUpdate, UtilitySystems::layer_sorting_system);

pub fn cleanup_system<T>( commands: Commands<'_, '_>, query: Query<'_, '_, Entity, With<T>>, )

where T: Component,

清理系统

清理标记为删除的实体和组件。

示例

use anvilkit_ecs::prelude::*;
use anvilkit_ecs::schedule::AnvilKitSchedule;

#[derive(Component)]
struct ToDelete;

let mut app = App::new();
app.add_systems(AnvilKitSchedule::Cleanup, UtilitySystems::cleanup_system::<ToDelete>);