Odd gizmo line thickness depending on camera angle

[rparrett]

Bevy version

Tested 0.11, 0.11.1, and current main.

Relevant system information

AdapterInfo { name: "Apple M1 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }
SystemInfo { os: "MacOS 13.4.1 ", kernel: "22.5.0", cpu: "Apple M1 Max", core_count: "10", memory: "64.0 GiB" }

What you did

I noticed this after enabling rapier debug rendering while migrating a project from 0.10 to 0.11. Rapier uses two lines with large extents to represent halfspace colliders. One was displayed very thick and one was very thin.

Here's a minimal reproducer:

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .add_systems(Update, system)
        .run();
}

fn setup(mut commands: Commands) {
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(10., 10.75, 14.).with_rotation(Quat::from_euler(
            EulerRot::XYZ,
            -0.983,
            0.,
            0.,
        )),
        ..default()
    });
}

fn system(mut gizmos: Gizmos) {
    gizmos.line(
        [10000.0, -20.0, 0.0].into(),
        [-10000.0, -20.0, 0.0].into(),
        Color::hsla(30.0, 1.0, 0.4, 1.0),
    );

    gizmos.line(
        [0.0, -20.0, -10000.0].into(),
        [0.0, -20.0, 10000.0].into(),
        Color::hsla(30.0, 1.0, 0.4, 1.0),
    );
}

What went wrong

I would expect to see two crossed lines of similar thickness. I'm not familiar enough with gizmos to say what sort of thickness is appropriate.

Instead, we get one very thick line and one very thin line. This behavior changes depending on the camera angle.

[rparrett]

Fixed by #9470