Inspector General, Generalized Atmospheres, and Abym's Steam Page

This week sees the creation of the Inspector General working group, whose members are attempting to build a bevy-native Entity inspector. You can find this working group in the #working-groups category in the Bevy Discord.

In the ecosystem, CoACD-rs was released as an implementation of Approximate Convex Decomposition for 3D Meshes with Collision-Aware Concavity and Tree Search... which is a mouthful but very cool.

Upstream Bevy's Atmosphere support gained new generalized configuration, and Resources as Components is starting to gain steam. While Abysm (winner of the 2024 community-run Bevy spooky jam) got its Steam Page.

Generalized Atmospheric Scattering

#20838 generalizes the terms of Bevy's Atmosphere support, enabling a higher degree of control over how light scatters in an atmosphere. This in turn makes it possible to better emulate environments like dry, dusty deserts.

fn init_atmosphere(mut commands: Commands, scattering_media: ResMut<Assets<ScatteringMedium>>) {
  let earth_atmosphere = scattering_media.add(
    ScatteringMedium::new(
      256,
      256,
      [
          // rayleigh scattering
          ScatteringTerm {
              absorption: Vec3::ZERO,
              scattering: Vec3::new(5.802e-6, 13.558e-6, 33.100e-6),
              falloff: Falloff::Exponential { scale: 12.5 },
              phase: PhaseFunction::Rayleigh,
          },
          // mie scattering
          ScatteringTerm {
              absorption: Vec3::splat(3.996e-6),
              scattering: Vec3::splat(0.444e-6),
              falloff: Falloff::Exponential { scale: 83.5 },
              phase: PhaseFunction::Mie { bias: 0.8 },
          },
          // ozone
          ScatteringTerm {
              absorption: Vec3::new(0.650e-6, 1.881e-6, 0.085e-6),
              scattering: Vec3::ZERO,
              falloff: Falloff::Tent {
                  center: 0.75,
                  width: 0.3,
              },
              phase: PhaseFunction::Isotropic,
          },
      ],
  ));

  commands.spawn((
    Camera3d::default(), 
    Atmosphere {
      bottom_radius: 6_360_000.0,
      top_radius: 6_460_000.0,
      ground_albedo: Vec3::splat(0.3),
      medium: earth_atmosphere,
    },
  ));
}

Traversing Dynamic Relationships

#21601 introduces an API for traversing Relationships in dynamic contexts. This allows traversing relationships without knowing their type, such as when you only have a ComponentId.

Text Improvements

Implelementations for text underline and text strikethrough were added, along with new examples.

Internal Removed

An internal component called Internal was previously added, resulting in behavior like Observers being filtered out of queries by default. After further consideration, this component is being removed and will not exist in 0.18.

Split AmbientLight

Resources as Components is progressing, and as a result one of the only structs that derived Resource and Component has been split into two.

AmbientLight is now AmbientLight (the Resource) and AmbientLightOverride (the Component).