cursor ui

src/cursor.rs

@@ -0,0 +1,47 @@
+use crate::constants::*;
+use bevy::{prelude::*, winit::cursor};
+
+#[derive(Component)]
+#[require(Transform)]
+pub struct Cursor {
+    id: f32,
+}
+
+pub fn setup_curor(mut commands: Commands, asset_server: Res<AssetServer>) {
+    commands.spawn((
+        Transform::from_xyz(0., 0., 10.).with_scale(Vec3::splat(PIXEL_RATIO)),
+        Sprite {
+            image: asset_server.load("cursor.png"),
+            ..Default::default()
+        },
+        Cursor { id: 1. },
+    ));
+}
+
+pub fn move_cursor(
+    camera_query: Single<(&Camera, &GlobalTransform)>,
+    windows: Query<&Window>,
+    mut query: Query<(&Cursor, &mut Transform), With<Transform>>,
+) {
+    for mut transform in query.iter_mut() {
+        let (camera, camera_transform) = *camera_query;
+
+        let Ok(window) = windows.get_single() else {
+            return;
+        };
+
+        let Some(cursor_position) = window.cursor_position() else {
+            return;
+        };
+
+        // Calculate a world position based on the cursor's position.
+        let Ok(point) = camera.viewport_to_world_2d(camera_transform, cursor_position) else {
+            return;
+        };
+        transform.1.translation = Vec3::new(
+            ((point.x / (TILE_SIZE)+0.5).floor()) * TILE_SIZE,
+            ((point.y / (TILE_SIZE)+0.5).floor()) * TILE_SIZE,
+            100.0,
+        );
+    }
+}