examples/systems/
system_custom_phases_no_builtin.rs

1use crate::z_ignore_test_common::*;
2
3use flecs_ecs::prelude::*;
4// This application demonstrates how to use custom phases for systems. The
5// default pipeline will automatically run systems for custom phases as long as
6// they have the flecs::Phase tag.
7
8// Dummy system
9fn sys(mut it: TableIter) {
10    while it.next() {
11        println!("system {}", it.system().name());
12    }
13}
14
15fn main() {
16    let world = World::new();
17
18    // Create three custom phases. Note that the phases have the Phase tag,
19    // which is necessary for the builtin pipeline to discover which systems it
20    // should run.
21
22    let update = world.entity().add(id::<flecs::pipeline::Phase>());
23
24    let physics = world
25        .entity()
26        .add(id::<flecs::pipeline::Phase>())
27        .depends_on(update);
28
29    let collisions = world
30        .entity()
31        .add(id::<flecs::pipeline::Phase>())
32        .depends_on(physics);
33
34    // Create 3 dummy systems.
35    world
36        .system_named::<()>("CollisionSystem")
37        .kind(collisions)
38        .run(sys);
39
40    world
41        .system_named::<()>("PhysicsSystem")
42        .kind(physics)
43        .run(sys);
44
45    world.system_named::<()>("GameSystem").kind(update).run(sys);
46
47    // Run pipeline
48    world.progress();
49
50    // Output:
51    //   system GameSystem
52    //   system PhysicsSystem
53    //   system CollisionSystem
54}
55
56#[cfg(feature = "flecs_nightly_tests")]
57#[test]
58fn test() {
59    let output_capture = OutputCapture::capture().unwrap();
60    main();
61    output_capture.test("system_custom_phases_no_builtin".to_string());
62}
examples/systems/system_custom_phases_no_builtin.rs

examples/systems/
system_custom_phases_no_builtin.rs
