WIP movement
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72918dd102
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@ -2,6 +2,8 @@ use bevy::prelude::*;
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mod assets;
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mod camera;
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mod movement;
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mod player;
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fn main() {
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let mut app = App::new();
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40
src/movement.rs
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40
src/movement.rs
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@ -0,0 +1,40 @@
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use bevy::prelude::*;
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pub struct MovementPlugin;
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#[derive(Component, Debug, Default)]
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pub struct Velocity(Vec2);
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#[derive(Component, Debug, Default)]
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pub struct Heading(Vec2);
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#[derive(Component, Debug, Default)]
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pub struct Speed(f32);
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impl Velocity {
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pub fn from_speed_heading(heading: Vec2, speed: f32) -> Self {
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Self(heading.normalize_or_zero() * speed)
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}
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pub fn new(x: f32, y: f32) -> Self {
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Self(Vec2::new(x, y))
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}
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}
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#[derive(Bundle, Debug, Default)]
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pub struct MovementBundle {
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pub velocity: Velocity,
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}
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impl Plugin for MovementPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Update, update_position);
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}
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}
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fn update_position(mut query: Query<(&Velocity, &mut Transform)>, time: Res<Time>) {
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for (velocity, mut transform) in query.iter_mut() {
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// TODO: convert vec2 to vec3 with a zero Z value?
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transform.translation += velocity.0 * time.delta_seconds();
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}
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}
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57
src/player.rs
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57
src/player.rs
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@ -0,0 +1,57 @@
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use bevy::prelude::*;
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use crate::{
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assets::Assets,
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movement::{MovementBundle, Velocity},
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};
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const PLAYER_SPEED: f32 = 50.;
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pub struct PlayerPlugin;
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impl Plugin for PlayerPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(PostStartup, spawn_player)
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.add_systems(Update, player_movement);
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}
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}
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#[derive(Component, Debug)]
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pub struct Player;
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fn spawn_player(mut commands: Commands, sprite_assets: Res<SpriteAssets>) {
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commands.spawn((
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Player,
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SpriteBundle {
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texture: sprite_assets.knight.clone(),
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transform: Transform::from_xyz(0., 0., 0.),
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..Default::default()
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},
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MovementBundle {
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velocity: Velocity::new(0., 0.),
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},
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));
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}
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fn player_movement(mut query: Query<&mut Velocity, With<Player>>, input: Res<Input<KeyCode>>) {
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let mut direction = Vec3::ZERO;
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for key in input.get_pressed() {
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match key {
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KeyCode::W | KeyCode::Up => {
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direction += Vec3::Y;
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}
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KeyCode::A | KeyCode::Left => {
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direction += Vec3::NEG_X;
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}
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KeyCode::S | KeyCode::Down => {
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direction += Vec3::NEG_Y;
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}
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KeyCode::D | KeyCode::Right => {
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direction += Vec3::X;
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}
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_ => {}
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}
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}
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let mut velocity = query.single_mut();
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velocity.change_direction_speed(direction, PLAYER_SPEED);
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}
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