specs 0.20.0

Specs is an Entity-Component-System library written in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166

use super::{WorldExt, *};
use crate::{join::Join, storage::VecStorage};

struct Pos;

impl Component for Pos {
    type Storage = VecStorage<Self>;
}

struct Vel;

impl Component for Vel {
    type Storage = VecStorage<Self>;
}

#[test]
fn delete_all() {
    let mut world = World::new();

    world.register::<Pos>();
    world.register::<Vel>();

    world.create_entity().build();
    let b = world.create_entity().with(Pos).with(Vel).build();
    world.create_entity().with(Pos).with(Vel).build();

    assert_eq!(world.entities().join().count(), 3);

    world.delete_all();

    assert_eq!(world.entities().join().count(), 0);
    assert!(world.read_storage::<Pos>().get(b).is_none());
}

#[test]
fn lazy_insertion() {
    let mut world = World::new();
    world.register::<Pos>();
    world.register::<Vel>();

    let e1;
    let e2;
    {
        let entities = world.read_resource::<EntitiesRes>();
        let lazy = world.read_resource::<LazyUpdate>();

        e1 = entities.create();
        e2 = entities.create();
        lazy.insert(e1, Pos);
        lazy.insert_all(vec![(e1, Vel), (e2, Vel)]);
    }

    world.maintain();
    assert!(world.read_storage::<Pos>().get(e1).is_some());
    assert!(world.read_storage::<Vel>().get(e1).is_some());
    assert!(world.read_storage::<Vel>().get(e2).is_some());
}

#[test]
fn lazy_removal() {
    let mut world = World::new();
    world.register::<Pos>();

    let e = world.create_entity().with(Pos).build();
    {
        let lazy = world.read_resource::<LazyUpdate>();
        lazy.remove::<Pos>(e);
    }

    world.maintain();
    assert!(world.read_storage::<Pos>().get(e).is_none());
}

#[test]
fn super_lazy_execution() {
    let mut world = World::new();
    world.register::<Pos>();

    let e = {
        let entity_res = world.read_resource::<EntitiesRes>();
        entity_res.create()
    };
    world.read_resource::<LazyUpdate>().exec(move |world| {
        world.read_resource::<LazyUpdate>().exec(move |world| {
            if let Err(err) = world.write_storage::<Pos>().insert(e, Pos) {
                panic!("Unable to lazily insert component! {:?}", err);
            }
        });
        assert!(world.read_storage::<Pos>().get(e).is_none());
    });
    world.maintain();
    assert!(world.read_storage::<Pos>().get(e).is_some());
}

#[test]
fn lazy_execution() {
    let mut world = World::new();
    world.register::<Pos>();

    let e = {
        let entity_res = world.read_resource::<EntitiesRes>();
        entity_res.create()
    };
    {
        let lazy = world.read_resource::<LazyUpdate>();
        lazy.exec(move |world| {
            if let Err(err) = world.write_storage::<Pos>().insert(e, Pos) {
                panic!("Unable to lazily insert component! {:?}", err);
            }
        });
    }

    world.maintain();
    assert!(world.read_storage::<Pos>().get(e).is_some());
}

#[test]
fn lazy_execution_order() {
    let mut world = World::new();
    world.insert(Vec::<u32>::new());
    {
        let lazy = world.read_resource::<LazyUpdate>();
        lazy.exec(move |world| {
            let mut v = world.write_resource::<Vec<u32>>();
            v.push(1);
        });
        lazy.exec(move |world| {
            let mut v = world.write_resource::<Vec<u32>>();
            v.push(2);
        });
    }
    world.maintain();
    let v = world.read_resource::<Vec<u32>>();
    assert_eq!(&**v, &[1, 2]);
}

#[test]
fn delete_twice() {
    let mut world = World::new();

    let e = world.create_entity().build();

    world.delete_entity(e).unwrap();
    assert!(world.entities().delete(e).is_err());
}

#[test]
fn delete_and_lazy() {
    let mut world = World::new();
    {
        let lazy_update = world.write_resource::<crate::LazyUpdate>();
        lazy_update.exec(|world| {
            world.entities().create();
        })
    }

    world.maintain();
    {
        let lazy_update = world.write_resource::<crate::LazyUpdate>();
        lazy_update.exec(|world| {
            world.entities().create();
        })
    }

    world.delete_all();
}