#functional-programming #generics #bevy #fp #masking

macro bevy_mask_system

A library for system architecture that utilizes functional programming principles to organize code. It primarily uses mask-based generics to structure systems.

4 releases

0.1.3 Sep 12, 2024
0.1.2 Sep 12, 2024
0.1.1 Sep 12, 2024
0.1.0 Sep 12, 2024

#1312 in Game dev

30 downloads per month

MIT license

760KB
608 lines

BevyMaskSysmtem

Bevy 系统架构探索库

这个库用于探索 Bevy 游戏引擎的系统架构方式,参考了一部分函数式编程,更多的是一种没有目的的常量掩码泛型实验。 cargo add mask_system_lib //实现和过程宏分离了 cargo add bevy_mask_system //实现和过程宏分离了 两个都要添加 设计理念 https://www.bilibili.com/opus/973529984968687671

特性

  • 细粒度操作:我们可以将系统函数细分成更抽象的细粒度进行操作。
  • 组合方式:提供了一种方式将这些细粒度的系统函数组合起来。
  • 自定义上下文:可以绑定进自己的上下文进行 Bevy 查询标签的更改。

注意:前提是你使用带常量的结构体。

使用示例

使用示例可以在 example 目录里面找到。

额外信息

示例

// examples/example.rs

#![recursion_limit = "256"]
#![feature(specialization)]
#![feature(trait_alias)]
#![feature(generic_const_exprs)]
#![feature(const_type_id)]
#![feature(associated_type_defaults)]
#![feature(unboxed_closures)]
#![feature(unsize)]
#![feature(const_trait_impl)]
use bevy_mask_system::MaskSys;
#[warn(incomplete_features)]

// use rust_mask_system::MaskSys;
use mask_system_lib::{*};
use bevy::{
    app::{App, Startup, Update}, ecs::{component::Components, query::{QueryData, QueryFilter}}, math::bool, prelude::{default, Commands, Component, Entity, IntoSystem, Query, QueryBuilder, With, Without}, reflect::DynamicTuple, ui::shader_flags::BORDER, utils::all_tuples, DefaultPlugins
};

#[derive(Component)]
pub struct element<const const_t:usize>;

type WeaponExtractElements = Tag_1_2;
type WeaponDestructionOperation = Tag_2_4;

#[derive(MaskSys)]
pub struct Weapon;

impl<Content:MaskSystemContent> MaskSystem<WeaponExtractElements,Content> for Weapon
where
    [(); {Content::custom_val}]:,
{
    const _marker:usize = 2;

    type Output = fn(
        Query<&element<{Content::custom_val}>>,
    );

    fn export() -> Self::Output {
        |query:Query<&element<{Content::custom_val}>>|{
            println!("WeaponExtractElements tag:{}",Content::custom_val); 
            println!("提取元素 这里的标签是:{}",Content::custom_val);
        }
    }
} 

impl<Content:MaskSystemContent> MaskSystem<WeaponDestructionOperation,Content> for Weapon
where
    [(); {Content::custom_val}]:,
{
    const _marker:usize = 4;

    type Output = fn(
        Query<&element<{Content::custom_val}>>,
    );

    fn export() -> Self::Output {
        |query:Query<&element<{Content::custom_val}>>|{
            println!("WeaponDestructionOperation tag:{}",Content::custom_val); 
            println!("销毁武器 这里的标签是:{}",Content::custom_val);
        }
    }
} 

fn main() {

    /*用单一标签 WeaponExtractElements 提取系统函数 并使用绑定自定义上下文。**/
    /**"Extract system functions using a single label WeaponExtractElements and bind custom contexts." */
    let fns1 = F::<op!(WeaponExtractElements),Weapon,Content::<1,2,3,5>>::sign();
    
    /**用组合标签 WeaponExtractElements + WeaponDestructionOperation 提取WeaponExtractElements + WeaponDestructionOperation 并使用绑定自定义上下文。**/
    /**"Extract WeaponExtractElements + WeaponDestructionOperation using a combination of labels WeaponExtractElements + WeaponDestructionOperation and bind custom contexts." */
    let fns2 = F::<op!(WeaponExtractElements + WeaponDestructionOperation),Weapon,Content::<1,2,3,5>>::mask();
    
    /**提取所有系统函数 并使用绑定自定义上下文。**/
    /** "Extract all system functions and bind custom contexts."**/
    let fns3 = F::<op!(WeaponExtractElements + WeaponDestructionOperation),Weapon,Content::<1,2,3,5>>::all();

    App::new()
    .add_systems(Startup,fns3)
    .run();
}

Dependencies