How to call Camera::world_to_screen()?

[davidrusu]

In bevy 0.6.0, I was converting from world space to screen space using something like:

fn my_system(windows: Res<Windows>, camera_query: Query<(&Camera, &GlobalTransform)>) {
    if let Some((camera, cam_trans)) = camera_query.iter().next() {
        // ...
        let screen_point = camera.world_to_screen(&windows, &cam_trans, world_point);
        // ...
    }
}

But in 0.7.0, Camera::world_to_screen() has changed to also take an Assets<Image> parameter: https://docs.rs/bevy/latest/bevy/render/camera/struct.Camera.html#method.world_to_screen

I can't figure out where I might get this Assets<Image> parameter from. Assets has no obvious constructors, and I don't see any functions that return Assets<..>.

[alice-i-cecile]

You can fetch Assets from the World as a resource. The standard asset collections (like Image) are initialized by the DefaultPlugins.

[cart]

As a heads up, this api will be much simpler to call when we land #4745

camera.world_to_view(&camera_transform, world_position);

[davidrusu]

Thanks! finally got back to this now, just to expand on your answer slightly:

I added images: Res<Assets<bevy::prelude::Image>> to my system arguments and passed &images to camera.world_to_screen(&windows, &images, &cam_trans, world_point) and that got things running for me again.