Extend bundle

[YusufSuleman]

How do I extend a bundle in bevy, like there is an Object bundle containing, things like Position, Physics data, etc. And then there is a Player bundle, an enemy bundle, platform bundle, etc.
How would I do this? A simple google search leads me no where

Edit: I would need to extend those bundles further. like a harder enemy bundle, rotating platform bundle.

[Zoomulator]

There are examples of this in the docs :)
https://docs.rs/bevy/latest/bevy/ecs/bundle/trait.Bundle.html#implementors-1

Hope it helps!

[Zoomulator]

Worth knowing that you can also add components dynamically to your entities if need be:

fn my_system(mut commands: Commands) {
  let id = commands.spawn(MyStartingBundle);
  commands.entity(id).insert_component(Health(5.0));
}

[YusufSuleman]

So something like this:

#[derive(Bundle)]
pub struct Object {
    pub transform: Transform
}

#[derive(Bundle)]
pub struct BasicObject {
    pub object: Object,
    pub sprite: SpriteBundle
}

pub fn basic_object_factory() -> (BasicObject) {
    (BasicObject {
        object: Object { transform: Transform {..Default::default()} },
        sprite: SpriteBundle {..Default::default()},
    })
}

I am making a 2D game not 3D, I know it seems useless to have Object, but it creates a bit cleaner code and writing Transform everywhere would look dirty or would this make it even dirtier? I am getting a bit confused now?

[Zoomulator]

SpriteBundle already includes the Transform component actually: https://docs.rs/bevy/latest/bevy/prelude/struct.SpriteBundle.html

Also if you find the nesting a bit cumbersome, just assign the default to a local variable before spawning it and do your changes.

fn spawning_system(mut commands: Commands) {
  let mut obj = BasicObject::default();
  obj.sprite.transform = Transform::from_translation(Vec3::new(1.0, 2.0, 3.0));
  let id = commands.spawn(obj);

  if this_thing_needs_more_stuff() {
    commands.entity(id).insert(AnotherBundle::default()); // insert takes bundles, just like spawn!
  }
}

[YusufSuleman]

Should I just use SpriteBundle, or just include all the sprite things in it without the Transform and GlobalTransform?

[Zoomulator]

I'd just use SpriteBundle ¯_(ツ)_/¯