bevy/examples/startup_system.rs

47 lines
No EOL
1.4 KiB
Rust

use bevy::prelude::*;
fn main() {
App::build()
.add_default_plugins()
.add_startup_system(startup_system.system())
.run();
}
/// Set up a simple scene using a "startup system".
/// Startup systems are run exactly once when the app starts up.
/// They run right before "normal" systems run.
fn startup_system(
command_buffer: &mut CommandBuffer,
mut meshes: ResourceMut<AssetStorage<Mesh>>,
mut materials: ResourceMut<AssetStorage<StandardMaterial>>,
) {
let cube_handle = meshes.add(Mesh::from(shape::Cube));
let cube_material_handle = materials.add(StandardMaterial {
albedo: Color::rgb(0.5, 0.4, 0.3),
..Default::default()
});
command_buffer
.build()
// cube
.add_entity(MeshEntity {
mesh: cube_handle,
material: cube_material_handle,
translation: Translation::new(0.0, 0.0, 0.0),
..Default::default()
})
// light
.add_entity(LightEntity {
translation: Translation::new(4.0, -4.0, 5.0),
..Default::default()
})
// camera
.add_entity(CameraEntity {
local_to_world: LocalToWorld(Mat4::look_at_rh(
Vec3::new(3.0, 8.0, 5.0),
Vec3::new(0.0, 0.0, 0.0),
Vec3::new(0.0, 0.0, 1.0),
)),
..Default::default()
});
}