Using bevy_gizmos feature with default-features=false renders nothing (requires extra bevy_pbr feature)

[bonsairobo]

Bevy version

0.12

What you did

Tried to use bevy_gizmos with the following bevy dependency configuration:

[dependencies.bevy]
version = "0.12"
default-features = false
features = ["bevy_gizmos"]

What went wrong

Gizmos were not drawn.

Additional information

The fix was to add the bevy_pbr feature:

[dependencies.bevy]
version = "0.12"
default-features = false
features = ["bevy_gizmos", "bevy_pbr"]

I think we just need to add an explicit dependency on bevy_pbr here:

bevy/Cargo.toml

Line 132 in ca1874e

bevy_gizmos = ["bevy_internal/bevy_gizmos"]

[tim-blackbird]

Always adding bevy_pbr as a feature would prevent users that only need bevy_sprite from disabling it, and vice versa.

[BD103]

Since gizmos requires either bevy_pbr or bevy_sprite, perhaps a compile error could be thrown when neither is enabled.

#[cfg(all(not(feature = "bevy_pbr"), not(feature = "bevy_sprite")))]
compile_error!("bevy_gizmos requires either bevy_pbr or bevy_sprite. Please enable one as an optional dependency.");