43fe83b7c6
# Objective Fixes a typo in one of the comments in an example. ## Solution Fix the typo in the comment.
66 lines
2.0 KiB
Rust
66 lines
2.0 KiB
Rust
//! This example demonstrates Bevy's immediate mode drawing API intended for visual debugging.
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use std::f32::consts::PI;
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use bevy::prelude::*;
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_systems(Startup, setup)
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.add_systems(Update, (system, update_config))
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.run();
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn(Camera2dBundle::default());
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// text
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commands.spawn(TextBundle::from_section(
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"Hold 'Left' or 'Right' to change the line width",
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TextStyle {
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font: asset_server.load("fonts/FiraMono-Medium.ttf"),
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font_size: 24.,
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color: Color::WHITE,
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},
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));
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}
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fn system(mut gizmos: Gizmos, time: Res<Time>) {
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let sin = time.elapsed_seconds().sin() * 50.;
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gizmos.line_2d(Vec2::Y * -sin, Vec2::splat(-80.), Color::RED);
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gizmos.ray_2d(Vec2::Y * sin, Vec2::splat(80.), Color::GREEN);
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// Triangle
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gizmos.linestrip_gradient_2d([
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(Vec2::Y * 300., Color::BLUE),
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(Vec2::new(-255., -155.), Color::RED),
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(Vec2::new(255., -155.), Color::GREEN),
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(Vec2::Y * 300., Color::BLUE),
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]);
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gizmos.rect_2d(
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Vec2::ZERO,
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time.elapsed_seconds() / 3.,
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Vec2::splat(300.),
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Color::BLACK,
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);
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// The circles have 32 line-segments by default.
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gizmos.circle_2d(Vec2::ZERO, 120., Color::BLACK);
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// You may want to increase this for larger circles.
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gizmos.circle_2d(Vec2::ZERO, 300., Color::NAVY).segments(64);
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// Arcs default amount of segments is linearly interpolated between
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// 1 and 32, using the arc length as scalar.
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gizmos.arc_2d(Vec2::ZERO, sin / 10., PI / 2., 350., Color::ORANGE_RED);
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}
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fn update_config(mut config: ResMut<GizmoConfig>, keyboard: Res<Input<KeyCode>>, time: Res<Time>) {
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if keyboard.pressed(KeyCode::Right) {
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config.line_width += 5. * time.delta_seconds();
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}
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if keyboard.pressed(KeyCode::Left) {
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config.line_width -= 5. * time.delta_seconds();
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}
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}
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