Function elementalist::player::animation::update_avatar_animation

pub fn update_avatar_animation(
    sprite_query: Query<'_, '_, &mut TextureAtlasSprite, With<PlayerAvatar>>,
    state: Res<'_, State<PlayerAnimation>>,
    supplemental_state: Res<'_, State<PlayerAnimationSupplemental>>,
    facing: Res<'_, State<PlayerFacing>>,
    supplemental_state_next: ResMut<'_, NextState<PlayerAnimationSupplemental>>,
    frame: Res<'_, AnimationFrame>
)

The system that updates the avatar’s animation based on its state.

Tracks a local “frame” that goes from 0 to 3, and updates the sprite index based on the current state. We advance the frame every 0.1 seconds.