bevy_touch_camera 0.1.2

use bevy::prelude::*;
use bevy_touch_camera::{TouchCameraPlugin, TouchCameraTag};

fn main() {
    App::new()
        .insert_resource(ClearColor(Color::BLACK))
        .add_plugins((
            DefaultPlugins.set(WindowPlugin {
                primary_window: Some(Window {
                    resolution: (640., 360.).into(),
                    ..Default::default()
                }),
                ..Default::default()
            }),
            TouchCameraPlugin::default(),
        ))
        .add_systems(Startup, setup)
        .add_systems(Update, touch_indicators)
        .run();
}

#[derive(Component)]
struct TouchIndicatorTag;

fn setup(mut cmds: Commands, asset_server: Res<AssetServer>) {
    cmds.spawn((Camera2dBundle::default(), TouchCameraTag));

    // touch indicators
    for _ in 0..2 {
        // UI box
        cmds.spawn((
            NodeBundle {
                style: Style {
                    width: Val::Px(30.0),
                    height: Val::Px(30.0),
                    position_type: PositionType::Absolute,
                    ..default()
                },
                background_color: Color::WHITE.into(),
                // background_color: Color::rgba(1.0, 0.5, 0.5, 0.7).into(),
                ..default()
            },
            UiImage::new(asset_server.load("pointer-hand-svgrepo-com.png")),
            TouchIndicatorTag,
        ));
    }

    // scene objects
    for i in -5..5 {
        for j in -5..5 {
            cmds.spawn(SpriteBundle {
                sprite: Sprite {
                    color: Color::INDIGO,
                    custom_size: Some(Vec2::new(100.0, 100.0)),
                    ..default()
                },
                transform: Transform::from_translation(Vec3::new(
                    i as f32 * 200.,
                    j as f32 * 200.,
                    0.,
                )),
                ..default()
            });
        }
    }
}

fn touch_indicators(
    mut indicators_q: Query<&mut Style, With<TouchIndicatorTag>>,
    touches_res: Res<Touches>,
) {
    for mut style in indicators_q.iter_mut() {
        style.display = Display::None;
    }

    for (touch, mut style) in touches_res.iter().zip(indicators_q.iter_mut()) {
        style.display = Display::Flex;
        style.left = Val::Px(touch.position().x);
        style.top = Val::Px(touch.position().y);
    }
}