b6a647cc01
Adds a `default()` shorthand for `Default::default()` ... because life is too short to constantly type `Default::default()`.
```rust
use bevy::prelude::*;
#[derive(Default)]
struct Foo {
bar: usize,
baz: usize,
}
// Normally you would do this:
let foo = Foo {
bar: 10,
..Default::default()
};
// But now you can do this:
let foo = Foo {
bar: 10,
..default()
};
```
The examples have been adapted to use `..default()`. I've left internal crates as-is for now because they don't pull in the bevy prelude, and the ergonomics of each case should be considered individually.
84 lines
3.0 KiB
Rust
84 lines
3.0 KiB
Rust
use bevy::prelude::*;
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/// This example illustrates various ways to load assets
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fn main() {
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App::new()
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.insert_resource(Msaa { samples: 4 })
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.add_plugins(DefaultPlugins)
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.add_startup_system(setup)
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.run();
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}
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fn setup(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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meshes: Res<Assets<Mesh>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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) {
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// By default AssetServer will load assets from inside the "assets" folder.
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// For example, the next line will load "ROOT/assets/models/cube/cube.gltf#Mesh0/Primitive0",
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// where "ROOT" is the directory of the Application.
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//
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// This can be overridden by setting the "CARGO_MANIFEST_DIR" environment variable (see
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// https://doc.rust-lang.org/cargo/reference/environment-variables.html)
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// to another directory. When the Application is run through Cargo, "CARGO_MANIFEST_DIR" is
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// automatically set to your crate (workspace) root directory.
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let cube_handle = asset_server.load("models/cube/cube.gltf#Mesh0/Primitive0");
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let sphere_handle = asset_server.load("models/sphere/sphere.gltf#Mesh0/Primitive0");
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// All assets end up in their Assets<T> collection once they are done loading:
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if let Some(sphere) = meshes.get(&sphere_handle) {
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// You might notice that this doesn't run! This is because assets load in parallel without
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// blocking. When an asset has loaded, it will appear in relevant Assets<T>
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// collection.
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info!("{:?}", sphere.primitive_topology());
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} else {
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info!("sphere hasn't loaded yet");
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}
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// You can load all assets in a folder like this. They will be loaded in parallel without
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// blocking
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let _scenes: Vec<HandleUntyped> = asset_server.load_folder("models/monkey").unwrap();
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// Then any asset in the folder can be accessed like this:
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let monkey_handle = asset_server.get_handle("models/monkey/Monkey.gltf#Mesh0/Primitive0");
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// You can also add assets directly to their Assets<T> storage:
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let material_handle = materials.add(StandardMaterial {
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base_color: Color::rgb(0.8, 0.7, 0.6),
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..default()
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});
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// monkey
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commands.spawn_bundle(PbrBundle {
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mesh: monkey_handle,
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material: material_handle.clone(),
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transform: Transform::from_xyz(-3.0, 0.0, 0.0),
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..default()
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});
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// cube
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commands.spawn_bundle(PbrBundle {
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mesh: cube_handle,
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material: material_handle.clone(),
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transform: Transform::from_xyz(0.0, 0.0, 0.0),
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..default()
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});
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// sphere
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commands.spawn_bundle(PbrBundle {
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mesh: sphere_handle,
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material: material_handle,
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transform: Transform::from_xyz(3.0, 0.0, 0.0),
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..default()
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});
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// light
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commands.spawn_bundle(PointLightBundle {
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transform: Transform::from_xyz(4.0, 5.0, 4.0),
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..default()
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});
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// camera
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commands.spawn_bundle(PerspectiveCameraBundle {
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transform: Transform::from_xyz(0.0, 3.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y),
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..default()
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});
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}
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