docs/bevy/examples/picking/debug_picking.rs 3.6 K · 109 lines · raw · history

1 //! A simple scene to demonstrate picking events for UI and mesh entities,
2 //! Demonstrates how to change debug settings
3
4 use bevy::dev_tools::picking_debug::{DebugPickingMode, DebugPickingPlugin};
5 use bevy::prelude::*;
6
7 fn main() {
8 App::new()
9 .add_plugins(DefaultPlugins.set(bevy::log::LogPlugin {
10 filter: "bevy_dev_tools=trace".into(), // Show picking logs trace level and up
11 ..default()
12 }))
13 .add_plugins((MeshPickingPlugin, DebugPickingPlugin))
14 .add_systems(Startup, setup_scene)
15 .insert_resource(DebugPickingMode::Normal)
16 // A system that cycles the debugging state when you press F3:
17 .add_systems(
18 PreUpdate,
19 (|mut mode: ResMut<DebugPickingMode>| {
20 *mode = match *mode {
21 DebugPickingMode::Disabled => DebugPickingMode::Normal,
22 DebugPickingMode::Normal => DebugPickingMode::Noisy,
23 DebugPickingMode::Noisy => DebugPickingMode::Disabled,
24 }
25 })
26 .distributive_run_if(bevy::input::common_conditions::input_just_pressed(
27 KeyCode::F3,
28 )),
29 )
30 .run();
31 }
32
33 fn setup_scene(
34 mut commands: Commands,
35 mut meshes: ResMut<Assets<Mesh>>,
36 mut materials: ResMut<Assets<StandardMaterial>>,
37 ) {
38 commands
39 .spawn((
40 Text::new("Click Me to get a box\nDrag cubes to rotate\nPress F3 to cycle between picking debug levels"),
41 Node {
42 position_type: PositionType::Absolute,
43 top: percent(12),
44 left: percent(12),
45 ..default()
46 },
47 ))
48 .observe(on_click_spawn_cube)
49 .observe(
50 |out: On<PointerOut>, mut texts: Query<&mut TextColor>| {
51 let mut text_color = texts.get_mut(out.entity).unwrap();
52 text_color.0 = Color::WHITE;
53 },
54 )
55 .observe(
56 |over: On<PointerOver>, mut texts: Query<&mut TextColor>| {
57 let mut color = texts.get_mut(over.entity).unwrap();
58 color.0 = bevy::color::palettes::tailwind::CYAN_400.into();
59 },
60 );
61
62 // Base
63 commands.spawn((
64 Name::new("Base"),
65 Mesh3d(meshes.add(Circle::new(4.0))),
66 MeshMaterial3d(materials.add(Color::WHITE)),
67 Transform::from_rotation(Quat::from_rotation_x(-std::f32::consts::FRAC_PI_2)),
68 ));
69
70 // Light
71 commands.spawn((
72 PointLight {
73 shadow_maps_enabled: true,
74 ..default()
75 },
76 Transform::from_xyz(4.0, 8.0, 4.0),
77 ));
78
79 // Camera
80 commands.spawn((
81 Camera3d::default(),
82 Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
83 ));
84 }
85
86 fn on_click_spawn_cube(
87 _click: On<PointerClick>,
88 mut commands: Commands,
89 mut meshes: ResMut<Assets<Mesh>>,
90 mut materials: ResMut<Assets<StandardMaterial>>,
91 mut num: Local<usize>,
92 ) {
93 commands
94 .spawn((
95 Mesh3d(meshes.add(Cuboid::new(0.5, 0.5, 0.5))),
96 MeshMaterial3d(materials.add(Color::srgb_u8(124, 144, 255))),
97 Transform::from_xyz(0.0, 0.25 + 0.55 * *num as f32, 0.0),
98 ))
99 // With the MeshPickingPlugin added, you can add pointer event observers to meshes:
100 .observe(on_drag_rotate);
101 *num += 1;
102 }
103
104 fn on_drag_rotate(drag: On<PointerDrag>, mut transforms: Query<&mut Transform>) {
105 if let Ok(mut transform) = transforms.get_mut(drag.entity) {
106 transform.rotate_y(drag.delta.x * 0.02);
107 transform.rotate_x(drag.delta.y * 0.02);
108 }
109 }