2020-07-28 14:26:12 -07:00
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use bevy::prelude::*;
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2020-01-11 01:46:51 -08:00
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2020-07-31 17:10:29 -07:00
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/// This example illustrates how to create parent->child relationships between entities how parent transforms
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/// are propagated to their descendants
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2020-01-11 01:46:51 -08:00
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fn main() {
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2020-03-20 16:35:19 -07:00
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App::build()
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2020-07-30 14:35:07 -07:00
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.add_resource(Msaa { samples: 4 })
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2020-04-04 12:40:32 -07:00
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.add_default_plugins()
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2020-05-13 17:31:56 -07:00
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.add_startup_system(setup.system())
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2020-04-30 13:52:11 -07:00
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.add_system(rotator_system.system())
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2020-01-11 03:31:36 -08:00
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.run();
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2020-01-11 01:46:51 -08:00
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}
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2020-07-31 17:10:29 -07:00
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/// this component indicates what entities should rotate
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struct Rotator;
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2020-04-06 21:32:19 -07:00
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/// rotates the parent, which will result in the child also rotating
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2020-09-14 23:00:32 +02:00
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fn rotator_system(time: Res<Time>, mut query: Query<(&Rotator, &mut Transform)>) {
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2020-10-29 23:39:55 -07:00
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for (_rotator, mut transform) in query.iter_mut() {
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2020-10-18 22:03:16 +02:00
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transform.rotation *= Quat::from_rotation_x(3.0 * time.delta_seconds);
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2020-06-27 12:06:12 -07:00
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}
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2020-01-11 01:46:51 -08:00
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}
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2020-04-12 14:47:41 -07:00
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/// set up a simple scene with a "parent" cube and a "child" cube
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2020-05-13 17:31:56 -07:00
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fn setup(
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2020-07-09 21:18:35 -07:00
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mut commands: Commands,
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2020-05-13 17:52:47 -07:00
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mut meshes: ResMut<Assets<Mesh>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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2020-05-13 17:31:56 -07:00
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) {
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2020-05-16 00:21:04 -07:00
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let cube_handle = meshes.add(Mesh::from(shape::Cube { size: 1.0 }));
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2020-05-13 17:31:56 -07:00
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let cube_material_handle = materials.add(StandardMaterial {
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2020-10-12 16:54:22 -07:00
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albedo: Color::rgb(0.8, 0.7, 0.6),
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2020-03-17 22:02:01 -07:00
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..Default::default()
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2020-03-16 00:45:28 -07:00
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});
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2020-01-11 01:46:51 -08:00
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2020-07-09 21:18:35 -07:00
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commands
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2020-03-09 01:31:15 -07:00
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// parent cube
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2020-07-09 21:18:35 -07:00
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.spawn(PbrComponents {
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2020-10-18 13:48:15 -07:00
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mesh: cube_handle.clone(),
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material: cube_material_handle.clone(),
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2020-09-14 23:00:32 +02:00
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transform: Transform::from_translation(Vec3::new(0.0, 0.0, 1.0)),
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2020-03-09 01:31:15 -07:00
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..Default::default()
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})
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2020-06-25 11:21:56 -07:00
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.with(Rotator)
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2020-07-09 21:18:35 -07:00
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.with_children(|parent| {
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2020-04-06 21:32:19 -07:00
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// child cube
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2020-07-09 21:18:35 -07:00
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parent.spawn(PbrComponents {
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2020-03-09 02:00:59 -07:00
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mesh: cube_handle,
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2020-03-16 00:45:28 -07:00
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material: cube_material_handle,
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2020-09-14 23:00:32 +02:00
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transform: Transform::from_translation(Vec3::new(0.0, 0.0, 3.0)),
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2020-03-09 02:00:59 -07:00
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..Default::default()
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2020-07-09 21:18:35 -07:00
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});
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2020-03-09 01:31:15 -07:00
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})
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// light
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2020-07-09 21:18:35 -07:00
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.spawn(LightComponents {
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2020-09-14 23:00:32 +02:00
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transform: Transform::from_translation(Vec3::new(4.0, 5.0, -4.0)),
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2020-03-09 01:31:15 -07:00
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..Default::default()
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})
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// camera
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2020-07-19 17:00:08 -07:00
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.spawn(Camera3dComponents {
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2020-10-18 13:48:15 -07:00
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transform: Transform::from_translation(Vec3::new(5.0, 10.0, 10.0))
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.looking_at(Vec3::default(), Vec3::unit_y()),
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2020-03-21 21:55:33 -07:00
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..Default::default()
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2020-04-07 13:25:01 -07:00
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});
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2020-01-11 01:59:39 -08:00
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}
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