78 lines
2.2 KiB
Rust
78 lines
2.2 KiB
Rust
use bevy::{input::keyboard::KeyCode, prelude::*};
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use bevy_input::Input;
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fn main() {
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App::build()
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.add_default_plugins()
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.add_startup_system(setup.system())
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.add_system(move_on_input.system())
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.run();
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}
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/// moves our cube left when the "left" key is pressed. moves it right when the "right" key is pressed
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fn move_on_input(
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world: &mut SubWorld,
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time: Res<Time>,
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input: Res<Input>,
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query: &mut Query<(Write<Translation>, Read<Handle<Mesh>>)>,
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) {
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let moving_left = input.key_pressed(KeyCode::Left);
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let moving_right = input.key_pressed(KeyCode::Right);
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if input.key_just_pressed(KeyCode::Left) {
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println!("left just pressed");
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}
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if input.key_just_released(KeyCode::Left) {
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println!("left just released");
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}
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const SPEED: f32 = 3.0;
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for (mut translation, _) in query.iter_mut(world) {
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if moving_left {
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translation.0 += math::vec3(SPEED, 0.0, 0.0) * time.delta_seconds;
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}
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if moving_right {
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translation.0 += math::vec3(-SPEED, 0.0, 0.0) * time.delta_seconds;
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}
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}
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}
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/// creates a simple scene
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fn setup(
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command_buffer: &mut CommandBuffer,
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mut meshes: ResMut<Assets<Mesh>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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) {
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let cube_handle = meshes.add(Mesh::from(shape::Cube { size: 1.0 }));
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let cube_material_handle = materials.add(StandardMaterial {
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albedo: Color::rgb(0.5, 0.4, 0.3),
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..Default::default()
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});
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command_buffer
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.build()
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// cube
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.add_entity(MeshEntity {
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mesh: cube_handle,
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material: cube_material_handle,
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translation: Translation::new(0.0, 0.0, 1.0),
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..Default::default()
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})
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// light
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.add_entity(LightEntity {
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translation: Translation::new(4.0, -4.0, 5.0),
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..Default::default()
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})
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// camera
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.add_entity(PerspectiveCameraEntity {
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local_to_world: LocalToWorld::new_sync_disabled(Mat4::look_at_rh(
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Vec3::new(3.0, 8.0, 5.0),
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Vec3::new(0.0, 0.0, 0.0),
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Vec3::new(0.0, 0.0, 1.0),
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)),
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..Default::default()
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});
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}
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