use bevy::{pbr::{CascadeShadowConfigBuilder, DirectionalLightShadowMap}, prelude::*};

fn main() {
    App::new()
        .insert_resource(DirectionalLightShadowMap { size: 4096 })
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn(
        Camera3dBundle {
            transform: Transform::from_xyz(0.7, 0.7, 1.0)
                .looking_at(Vec3::new(0.0, 0.3, 0.0), Vec3::Y),
            ..default()
        }
    );
    
    commands.spawn(DirectionalLightBundle {
        directional_light: DirectionalLight {
            shadows_enabled: true,
            ..default()
        },
        // This is a relatively small scene, so use tighter shadow
        // cascade bounds than the default for better quality.
        // We also adjusted the shadow map to be larger since we're
        // only using a single cascade.
        cascade_shadow_config: CascadeShadowConfigBuilder {
            num_cascades: 1,
            maximum_distance: 1.6,
            ..default()
        }
        .into(),
        ..default()
    });

    
    commands.spawn(SceneBundle {
        scene: asset_server.load("example.gltf"),
        ..default()
    });
}