Getting a sprite from a spritesheet by region (position, size)

[Mo32167]

Is there a way to get a sprite from a spritesheet by region rather than index? E.g. get the red ball from here https://opengameart.org/sites/default/files/breakout_spritesheet.png using position 32,0 and size 32x32

I've only figured out how to get a sprite by index by using TextureAtlas::from_grid but I'm wondering if there is a way to do it by region for spritesheets with different sized sprites.

[ickshonpe]

You can add new sprite rects to a TextureAtlas manually with the add_texture method.
It takes a rectangular area of the image as an argument and then returns an index you can use to spawn a SpriteSheetBundle.
For your example, you could do:

// atlases is a ResMut<Assets<TextureAtlas> and assumes we've got a handle for the atlas
if let Some(breakout_atlas) = atlases.get_mut(&break_out_atlas_handle) {
  let red_ball_index = breakout_atlas.add_texture(bevy_sprite::Rect { min: vec2(32., 0.), max: vec2(64.0, 32.0) });
  commands.spawn_bundle(SpriteSheetBundle {
      sprite: TextureAtlasSprite::new(red_ball_index),
      texture_atlas: breakout_atlas_handle.clone(),
      ..Default::default()
  });
}

[Mo32167]

Thank you! Your solution worked except I needed to change the syntax slightly for add_texture:
breakout_atlas.add_texture(bevy::sprite::Rect {min: Vec2::new(32., 0.), max: Vec2::new(64., 32.)});

[ickshonpe]

ah yes, that's because vec2 is a function in bevy::math that isn't included in the prelude.