bevy_atmosphere 0.4.0

A procedural sky plugin for bevy
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

//! Based of the Bevy "Split Screen" example
//! Used to demonstrate how multiple skyboxes could be made for a local multiplayer game

use bevy::{
    core_pipeline::clear_color::ClearColorConfig,
    prelude::*,
    render::{camera::Viewport, view::RenderLayers},
    window::{WindowId, WindowResized},
};
use bevy_atmosphere::prelude::*;

fn main() {
    App::new()
        .insert_resource(Msaa { samples: 4 })
        .insert_resource(Atmosphere {
            rayleigh_coefficient: Vec3::new(22.4e-6, 5.5e-6, 13.0e-6), // Change rayleigh coefficient to change color
            ..default()
        })
        .add_plugins(DefaultPlugins)
        .add_plugin(AtmospherePlugin)
        .add_startup_system(setup)
        .add_system(set_camera_viewports)
        .run();
}

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // plane
    commands.spawn_bundle(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Plane { size: 100.0 })),
        material: materials.add(Color::rgb(0.3, 0.5, 0.3).into()),
        ..default()
    });

    // light
    commands.spawn_bundle(DirectionalLightBundle {
        transform: Transform::from_rotation(Quat::from_euler(
            EulerRot::ZYX,
            0.0,
            1.0,
            -std::f32::consts::FRAC_PI_4,
        )),
        directional_light: DirectionalLight {
            shadows_enabled: true,
            ..default()
        },
        ..default()
    });

    // spawn left screen camera
    commands
        .spawn_bundle(Camera3dBundle {
            transform: Transform::from_xyz(0.0, 25.0, -100.0).looking_at(Vec3::ZERO, Vec3::Y),
            ..default()
        })
        .insert(RenderLayers::from_layers(&[0, 1])) // To prevent each player from seeing the other skybox, we put each one on a separate render layer (you could also use this render layer for other player specific effects)
        .insert(AtmosphereCamera(Some(1)))
        .insert(LeftCamera);

    // spawn right screen camera
    commands
        .spawn_bundle(Camera3dBundle {
            transform: Transform::from_xyz(100.0, 50.0, 150.0).looking_at(Vec3::ZERO, Vec3::Y),
            camera: Camera {
                // Renders the right camera after the left camera, which has a default priority of 0
                priority: 1,
                ..default()
            },
            camera_3d: Camera3d {
                // dont clear on the second camera because the first camera already cleared the window
                clear_color: ClearColorConfig::None,
                ..default()
            },
            ..default()
        })
        .insert(RenderLayers::from_layers(&[0, 2]))
        .insert(AtmosphereCamera(Some(2)))
        .insert(RightCamera);
}

#[derive(Component)]
struct LeftCamera;

#[derive(Component)]
struct RightCamera;

fn set_camera_viewports(
    windows: Res<Windows>,
    mut resize_events: EventReader<WindowResized>,
    mut left_camera: Query<&mut Camera, (With<LeftCamera>, Without<RightCamera>)>,
    mut right_camera: Query<&mut Camera, With<RightCamera>>,
) {
    // We need to dynamically resize the camera's viewports whenever the window size changes
    // so then each camera always takes up half the screen.
    // A resize_event is sent when the window is first created, allowing us to reuse this system for initial setup.
    for resize_event in resize_events.iter() {
        if resize_event.id == WindowId::primary() {
            let window = windows.primary();
            let mut left_camera = left_camera.single_mut();
            left_camera.viewport = Some(Viewport {
                physical_position: UVec2::new(0, 0),
                physical_size: UVec2::new(window.physical_width() / 2, window.physical_height()),
                ..default()
            });

            let mut right_camera = right_camera.single_mut();
            right_camera.viewport = Some(Viewport {
                physical_position: UVec2::new(window.physical_width() / 2, 0),
                physical_size: UVec2::new(window.physical_width() / 2, window.physical_height()),
                ..default()
            });
        }
    }
}