2d_shapes.rs:
#[cfg(not(target_arch = "wasm32"))]
use bevy::sprite::{Wireframe2dConfig, Wireframe2dPlugin};
use bevy::{
prelude::*,
sprite::{MaterialMesh2dBundle, Mesh2dHandle},
};
fn main() {
let mut app = App::new();
app.add_plugins((
DefaultPlugins,
#[cfg(not(target_arch = "wasm32"))]
Wireframe2dPlugin,
))
.add_systems(Startup, setup);
#[cfg(not(target_arch = "wasm32"))]
app.add_systems(Update, toggle_wireframe);
app.run();
}
const X_EXTENT: f32 = 900.;
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut materials: ResMut<Assets<ColorMaterial>>,
) {
commands.spawn(Camera2dBundle::default());
let shapes = [
Mesh2dHandle(meshes.add(Circle { radius: 50.0 })),
Mesh2dHandle(meshes.add(CircularSector::new(50.0, 1.0))),
Mesh2dHandle(meshes.add(CircularSegment::new(50.0, 1.25))),
Mesh2dHandle(meshes.add(Ellipse::new(25.0, 50.0))),
Mesh2dHandle(meshes.add(Annulus::new(25.0, 50.0))),
Mesh2dHandle(meshes.add(Capsule2d::new(25.0, 50.0))),
Mesh2dHandle(meshes.add(Rhombus::new(75.0, 100.0))),
Mesh2dHandle(meshes.add(Rectangle::new(50.0, 100.0))),
Mesh2dHandle(meshes.add(RegularPolygon::new(50.0, 6))),
Mesh2dHandle(meshes.add(Triangle2d::new(
Vec2::Y * 50.0,
Vec2::new(-50.0, -50.0),
Vec2::new(50.0, -50.0),
))),
];
let num_shapes = shapes.len();
for (i, shape) in shapes.into_iter().enumerate() {
let color = Color::hsl(360. * i as f32 / num_shapes as f32, 0.95, 0.7);
commands.spawn(MaterialMesh2dBundle {
mesh: shape,
material: materials.add(color),
transform: Transform::from_xyz(
-X_EXTENT / 2. + i as f32 / (num_shapes - 1) as f32 * X_EXTENT,
0.0,
0.0,
),
..default()
});
}
#[cfg(not(target_arch = "wasm32"))]
commands.spawn(
TextBundle::from_section("Press space to toggle wireframes", TextStyle::default())
.with_style(Style {
position_type: PositionType::Absolute,
top: Val::Px(12.0),
left: Val::Px(12.0),
..default()
}),
);
}
#[cfg(not(target_arch = "wasm32"))]
fn toggle_wireframe(
mut wireframe_config: ResMut<Wireframe2dConfig>,
keyboard: Res<ButtonInput<KeyCode>>,
) {
if keyboard.just_pressed(KeyCode::Space) {
wireframe_config.global = !wireframe_config.global;
}
}