flecs_ecs 0.2.0

Rust API for the C/CPP flecs ECS library <https://github.com/SanderMertens/flecs>
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

use crate::z_ignore_test_common::*;

use flecs_ecs::prelude::*;

#[derive(Default, Component)]
#[flecs(meta)]
pub struct Point {
    pub x: f32,
    pub y: f32,
}

#[derive(Default, Component)]
#[flecs(meta)]
pub struct Line {
    pub start: Point,
    pub stop: Point,
}

fn main() {
    let world = World::new();

    // Create entity, set value of Line using reflection API
    let e = world.entity().add(Line::id());

    e.get::<&mut Line>(|line| {
        let mut cur = world.cursor(line);

        cur.push(); // {
        cur.member("start"); //   start:
        cur.push(); //   {
        cur.member("x"); //     x:
        cur.set_float(10.0); //     10
        cur.member("y"); //     y:
        cur.set_float(20.0); //     20
        cur.pop(); //   }
        cur.member("stop"); //   stop:
        cur.push(); //   {
        cur.member("x"); //     x:
        cur.set_float(30.0); //     30
        cur.member("y"); //     y:
        cur.set_float(40.0); //     40
        cur.pop(); //   }
        cur.pop(); // }

        // Convert component to string
        println!("{}", world.to_expr(line));
    });

    // Output:
    //  {start: {x: 10, y: 20}, stop: {x: 30, y: 40}}
}

#[cfg(feature = "flecs_nightly_tests")]
#[test]
fn test() {
    let output_capture = OutputCapture::capture().unwrap();
    main();
    output_capture.test("reflection_nested_set_member".to_string());
}