button system

src/card/mod.rs

@@ -0,0 +1,76 @@
+use bevy::prelude::*;
+
+pub mod drag;
+
+pub struct CardPlugin;
+
+#[derive(Component)]
+pub struct Card;
+
+#[derive(Component)]
+pub struct Hand;
+
+#[derive(Resource)]
+pub struct CardImage(Handle<Image>);
+
+impl Plugin for CardPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_systems(Startup, (hand_setup, test_card_setup).chain())
+            .add_systems(Update, card_arrange);
+    }
+}
+
+fn hand_setup(mut commands: Commands, asset_server: Res<AssetServer>) {
+    commands.spawn((Hand, Transform::from_xyz(0., -360., 0.)));
+
+    commands.insert_resource(CardImage(
+        asset_server.load::<Image>("sprites/cards/units/fosma.png"),
+    ));
+}
+
+fn test_card_setup(
+    mut commands: Commands,
+    hand: Single<Entity, With<Hand>>,
+    card_image: Res<CardImage>,
+) {
+    commands.spawn((
+        Sprite::from_image(card_image.0.clone()),
+        Transform::from_xyz(0., 0., 0.),
+        Card,
+        ChildOf(hand.entity()),
+    ));
+
+    commands.spawn((
+        Sprite::from_image(card_image.0.clone()),
+        Transform::from_xyz(0., 0., 0.),
+        Card,
+        ChildOf(hand.entity()),
+    ));
+
+    commands.spawn((
+        Sprite::from_image(card_image.0.clone()),
+        Transform::from_xyz(0., 0., 0.),
+        Card,
+        ChildOf(hand.entity()),
+    ));
+}
+
+fn card_arrange(
+    query: Query<(&mut Transform, &Sprite, &ChildOf), With<Card>>,
+    hand: Single<(Entity, &Children), With<Hand>>,
+    assets: Res<Assets<Image>>,
+) {
+    let cards_amount = hand.1.len();
+    let mut card_id = 0.;
+    for (mut transform, sprite, child_of) in query {
+        if child_of.parent() != hand.0 {
+            continue;
+        }
+        let size = assets.get(&sprite.image).unwrap().size_f32();
+        let left_boundary = -size.x * (cards_amount as f32) / 2.0 + size.x / 2.0;
+        transform.translation.x = left_boundary + size.x * card_id;
+        transform.translation.y = size.y / 2.0;
+
+        card_id += 1.0;
+    }
+}