forked from bevyengine/bevy
-
Notifications
You must be signed in to change notification settings - Fork 0
/
z_sort_debug.rs
89 lines (84 loc) · 2.97 KB
/
z_sort_debug.rs
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
use bevy::{
prelude::*,
render::{
camera::{Camera, VisibleEntities},
mesh::shape,
},
};
/// This example visualizes camera z-ordering by setting the material of rotating cubes to their distance from the camera
fn main() {
App::build()
.add_plugins(DefaultPlugins)
.add_startup_system(setup.system())
.add_system(rotator_system.system())
.add_system(camera_order_color_system.system())
.run();
}
struct Rotator;
/// rotates the parent, which will result in the child also rotating
fn rotator_system(time: Res<Time>, mut query: Query<&mut Transform, With<Rotator>>) {
for mut transform in query.iter_mut() {
transform.rotation *= Quat::from_rotation_x(3.0 * time.delta_seconds());
}
}
fn camera_order_color_system(
mut materials: ResMut<Assets<StandardMaterial>>,
camera_query: Query<&VisibleEntities, With<Camera>>,
material_query: Query<&Handle<StandardMaterial>>,
) {
for visible_entities in camera_query.iter() {
for visible_entity in visible_entities.iter() {
if let Ok(material_handle) = material_query.get(visible_entity.entity) {
let material = materials.get_mut(&*material_handle).unwrap();
let value = 1.0 - (visible_entity.order.0.sqrt() - 10.0) / 7.0;
material.albedo = Color::rgb(value, value, value);
}
}
}
}
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut materials: ResMut<Assets<StandardMaterial>>,
) {
let cube_handle = meshes.add(Mesh::from(shape::Cube { size: 2.0 }));
commands
// parent cube
.spawn(PbrBundle {
mesh: cube_handle.clone(),
material: materials.add(StandardMaterial {
unlit: true,
..Default::default()
}),
transform: Transform::from_xyz(0.0, 0.0, 1.0),
..Default::default()
})
.with(Rotator)
.with_children(|parent| {
// child cubes
parent
.spawn(PbrBundle {
mesh: cube_handle.clone(),
material: materials.add(StandardMaterial {
unlit: true,
..Default::default()
}),
transform: Transform::from_xyz(0.0, 3.0, 0.0),
..Default::default()
})
.spawn(PbrBundle {
mesh: cube_handle,
material: materials.add(StandardMaterial {
unlit: true,
..Default::default()
}),
transform: Transform::from_xyz(0.0, -3.0, 0.0),
..Default::default()
});
})
// camera
.spawn(PerspectiveCameraBundle {
transform: Transform::from_xyz(5.0, 10.0, 10.0).looking_at(Vec3::default(), Vec3::Y),
..Default::default()
});
}