53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
use bevy::prelude::*;
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struct SnakeHead;
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struct Materials {
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head_material: Handle<ColorMaterial>,
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}
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fn setup(commands: &mut Commands, mut materials: ResMut<Assets<ColorMaterial>>) {
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commands.spawn(Camera2dBundle::default());
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commands.insert_resource(Materials {
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head_material: materials.add(Color::rgb(0.7, 0.7, 0.7).into()),
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});
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}
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fn spawn_snake(commands: &mut Commands, materials: Res<Materials>) {
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commands
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.spawn(SpriteBundle {
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material: materials.head_material.clone(),
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sprite: Sprite::new(Vec2::new(10.0, 10.0)),
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..Default::default()
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})
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.with(SnakeHead);
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}
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fn snake_movement(
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keyboard_input: Res<Input<KeyCode>>,
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mut head_positions: Query<&mut Transform, With<SnakeHead>>,
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) {
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for mut transform in head_positions.iter_mut() {
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if keyboard_input.pressed(KeyCode::Left) {
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transform.translation.x -= 2.;
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}
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if keyboard_input.pressed(KeyCode::Right) {
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transform.translation.x += 2.;
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}
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if keyboard_input.pressed(KeyCode::Down) {
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transform.translation.y -= 2.;
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}
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if keyboard_input.pressed(KeyCode::Up) {
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transform.translation.y += 2.;
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}
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}
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}
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fn main() {
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App::build()
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.add_startup_system(setup.system())
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.add_startup_stage("game_setup", SystemStage::single(spawn_snake.system()))
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.add_system(snake_movement.system())
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.add_plugins(DefaultPlugins)
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.run();
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}
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