Can't get something to render? (Breakout Example)

[L-Boylan]

I'm fairly new to Rust in general and very new to the Bevy engine so forgive me if i'm missing something very obvious. Essentially I'm trying to learn Rust and Bevy together and was attempting to make my own version of pong, mostly by taking stuff from the 2D shapes example and Breakout examples on the Bevy engine website. I've come to the point where i'm adding in walls so the ball doesn't just fly off into the ether, but I can't seem to get the walls to render.

So I have a file "wall.rs" with the wall location/wall bundle stuff;

impl WallLocation {
    pub fn position(&self) -> Vec2 {
        match self {
            WallLocation::Left => Vec2::new(LEFT_WALL, 0.0),
            WallLocation::Right => Vec2::new(RIGHT_WALL, 0.0),
            WallLocation::Bottom => Vec2::new(0.0, BOTTOM_WALL),
            WallLocation::Top => Vec2::new( 0.0, TOP_WALL)
        }
    }

    pub fn size(&self) -> Vec2 {
        let arena_height = TOP_WALL - BOTTOM_WALL;
        let arena_width = RIGHT_WALL - LEFT_WALL;

        assert!(arena_height > 0.0);
        assert!(arena_width > 0.0);

        match self {
            WallLocation::Left | WallLocation::Right => {
                Vec2::new(WALL_THICKNESS, arena_height + WALL_THICKNESS)
            }
            WallLocation::Bottom | WallLocation::Top => {
                Vec2::new(arena_width + WALL_THICKNESS, WALL_THICKNESS)
            }
        }
    }
}

impl WallBundle {
    pub fn new(location: WallLocation) -> WallBundle{
        WallBundle {
            sprite_bundle: SpriteBundle {
                transform: Transform {
                    translation: location.position().extend(0.0),
                    scale: location.size().extend(1.0),
                    ..default()
                },
                sprite: Sprite {
                    color: Color::rgb(0.8, 0.8, 0.8),
                    ..default()
                },
                ..default()
            },
            collider: Collider,
        }
    }
}

And then in "main.rs" I have the bevy setup stuff;

fn main() {
    App::new()
        .add_plugins((DefaultPlugins, HelloPlugin))
        .run();
}

fn setup_walls(
    mut commands: Commands,
) {
    commands.spawn(WallBundle::new(wall::WallLocation::Left));
    commands.spawn(WallBundle::new(wall::WallLocation::Right));
    commands.spawn(WallBundle::new(wall::WallLocation::Top));
    commands.spawn(WallBundle::new(wall::WallLocation::Bottom));
}

impl Plugin for HelloPlugin {
    fn build(&self, app: &mut App){
        app.insert_resource(GreetTimer(Timer::from_seconds(2.0, TimerMode::Repeating)))
            .insert_resource(FixedTime::new_from_secs(1.0 / 60.0))
            .add_event::<CollisionEvent>()
            .add_systems(Startup, (add_people, paddle::draw_paddle, ball::draw_ball, setup_walls))
            .add_systems(FixedUpdate, (
                ball::check_for_collisions,
                ball::apply_velocity.before(ball::check_for_collisions),
                paddle::move_paddle_player1.before(ball::check_for_collisions).after(ball::apply_velocity),
                paddle::move_paddle_player2.before(ball::check_for_collisions).after(ball::apply_velocity),
            ))
            .add_systems(Update, greet_people);
    }
}

I'm not really understanding what is it that i'm missing and would greatly appreciate some help. Thanks in advance.
Also, please excuse the extra bits, I'm building this out from the same repo I was using when I went through the bevy book.

Edit:
So i've done some more mucking about with this and something i've done has started spitting out an error in the console every frame or so, perhaps this would be helpful;

2023-10-30T19:19:11.238396Z ERROR wgpu_hal::auxil::dxgi::exception: ID3D12CommandQueue::ExecuteCommandLists: Using IDXGISwapChain::Present on Command List (0x0000013900BC01C0:'Internal DXGI CommandList'): Resource state (0x4: D3D12_RESOURCE_STATE_RENDER_TARGET) of resource (0x0000013900C46E40:'Unnamed ID3D12Resource Object') (subresource: 0) is inval
id for use as a PRESENT_SOURCE.  Expected State Bits (all): 0x0: D3D12_RESOURCE_STATE_[COMMON|PRESENT], Actual State: 0x4: D3D12_RESOURCE_STATE_RENDER_TARGET, Missing State: 0x0: D3D12_RESOURCE_STATE_[COMMON|PRESENT]. [ EXECUTION ERROR #538: INVALID_SUBRESOURCE_STATE]
2023-10-30T19:19:11.238790Z ERROR wgpu_hal::auxil::dxgi::exception: ID3D12CommandQueue::Present: Resource state (0x4: D3D12_RESOURCE_STATE_RENDER_TARGET) of resource (0x0000013900C46E40:'Unnamed ID3D12Resource Object') (subresource: 0) is invalid for use as a INITIAL|PRESENT.  Expected State Bits (all): 0x0: D3D12_RESOURCE_STATE_[COMMON|PRESENT], Act
ual State: 0x4: D3D12_RESOURCE_STATE_RENDER_TARGET, Missing State: 0x0: D3D12_RESOURCE_STATE_[COMMON|PRESENT]. [ EXECUTION ERROR #538: INVALID_SUBRESOURCE_STATE]

Also, i've smashed my repo onto github, might be helpful to see the whole repo rather than just small code snippets; https://github.com/L-Boylan/learning_bevy_pong

[alice-i-cecile]

It looks like you've forgotten to add a camera :)

[L-Boylan]

I do already have a camera spawned in draw_paddle;

pub fn draw_paddle(
    mut commands: Commands,
    //mut meshes: ResMut<Assets<Mesh>>,
    //mut materials: ResMut<Assets<ColorMaterial>>
) {
    commands.spawn(Camera2dBundle::default());

    commands.spawn((Player1, Collider, SpriteBundle{
        sprite: Sprite {
            color: Color::rgb(0.25, 0.25, 0.75),
            custom_size: Some(PADDLE_SIZE),
            ..default()
        },
        transform: Transform::from_translation(Vec3::new(-480.0, 0.0, 0.0)),
        ..default()
    }));

    commands.spawn((Player2, Collider, SpriteBundle{
        sprite: Sprite {
            color: Color::rgb(0.25, 0.25, 0.75),
            custom_size: Some(PADDLE_SIZE),
            ..default()
        },
        transform: Transform::from_translation(Vec3::new(480.0, 0.0, 0.0)),
        ..default()
    }));
}

Is the problem that I'm doing that in draw_paddle instead of it's own seperate function or is the issue the order where it's being added to the app maybe?

[alice-i-cecile]

No, that shouldn't be the case. Can you get the breakout example itself to work for you? I'm not immediately sure what the difference might be.

[L-Boylan]

Yeah, I just copied the source code and it compiles and seems to run as expected aside from the warning about the missing soundfile, but that's to be expected as I didn't put one in the project

[L-Boylan]

Here's the repo, I just updated it with what i'm currently working with; https://github.com/L-Boylan/learning_bevy_pong
Hopefully it helps narrow down the issue