# Bevy 引擎研究

* [Bevy](https://bevyengine.org/)
* [Bevy book](https://bevyengine.org/learn/book/getting-started/)
* [Bevy Engine](https://github.com/bevyengine/bevy) : A refreshingly simple data-driven game engine built in Rust

## App

* 配置全局数据 insert\_resource
* 配置 Systems
  * 初始化 add\_startup\_system
  * 主循环 add\_system
* 配置 Plugin
  * Plugin 是配置 App 其他操作的集合

### ECS

* Entity : Entity(u64)
* Component : #\[derive(Component)] struct S
* Resource ：全局单例数据，不属于 Entity
  * Event 特殊的一种全局数据，支持触发和响应
* System : 就是函数，支持特定的传入参数，没有返回值 fn(
  * Commands : 用来增加或删除 Entity 和 Resource
  * Query< ：用来查询和修改里的 Component 数据
    * \&Component,
    * \&mut Component,
    * With< Component>,
  * Res< S>>, ：查询和修改全局数据
    * ResMut< S>>){}

## Resource

* Bevy 资源管理分析


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