75 lines
2.3 KiB
Rust
75 lines
2.3 KiB
Rust
use bevy::prelude::*;
|
|
|
|
struct Rotator;
|
|
|
|
fn main() {
|
|
AppBuilder::new()
|
|
.add_defaults()
|
|
.setup_world(setup)
|
|
.add_system(build_rotator_system())
|
|
.run();
|
|
}
|
|
|
|
// rotates the parent, which will result in the child also rotating
|
|
fn build_rotator_system() -> Box<dyn Schedulable> {
|
|
SystemBuilder::new("Rotator")
|
|
.read_resource::<Time>()
|
|
.with_query(<(Write<Rotator>, Write<Rotation>)>::query())
|
|
.build(move |_, world, time, rotator_query| {
|
|
for (_rotator, mut rotation) in rotator_query.iter_mut(world) {
|
|
rotation.0 = rotation.0 * Quat::from_rotation_x(3.0 * time.delta_seconds);
|
|
}
|
|
})
|
|
}
|
|
|
|
fn setup(world: &mut World, resources: &mut Resources) {
|
|
let mut mesh_storage = resources.get_mut::<AssetStorage<Mesh>>().unwrap();
|
|
let cube_handle = mesh_storage.add(Mesh::load(MeshType::Cube));
|
|
|
|
world
|
|
.build()
|
|
// parent cube
|
|
.add_entity(MeshEntity {
|
|
mesh: cube_handle,
|
|
material: StandardMaterial {
|
|
albedo: Color::rgb(0.5, 0.4, 0.3).into(),
|
|
},
|
|
translation: Translation::new(0.0, 0.0, 1.0),
|
|
..Default::default()
|
|
})
|
|
.add(Rotator)
|
|
.add_children(|builder| {
|
|
// cube
|
|
builder.add_entity(MeshEntity {
|
|
mesh: cube_handle,
|
|
material: StandardMaterial {
|
|
albedo: Color::rgb(0.5, 0.4, 0.3).into(),
|
|
},
|
|
translation: Translation::new(0.0, 0.0, 3.0),
|
|
..Default::default()
|
|
})
|
|
})
|
|
// light
|
|
.add_entity(LightEntity {
|
|
translation: Translation::new(4.0, -4.0, 5.0),
|
|
rotation: Rotation::from_euler_angles(0.0, 0.0, 0.0),
|
|
..Default::default()
|
|
})
|
|
// camera
|
|
.add_entity(CameraEntity {
|
|
camera: Camera::new(CameraType::Projection {
|
|
fov: std::f32::consts::PI / 4.0,
|
|
near: 1.0,
|
|
far: 1000.0,
|
|
aspect_ratio: 1.0,
|
|
}),
|
|
active_camera: ActiveCamera,
|
|
local_to_world: LocalToWorld(Mat4::look_at_rh(
|
|
Vec3::new(5.0, 10.0, 10.0),
|
|
Vec3::new(0.0, 0.0, 0.0),
|
|
Vec3::new(0.0, 0.0, 1.0),
|
|
)),
|
|
})
|
|
.build();
|
|
}
|