More in-depth explanations of component removal and adding

[Masterhigure]

The information available in the book on component adding and removal (specifically within the run() function of a System) is quite brief. The only example completely avoids deletions which, at least for LazyUpdate, have a drastically different syntax from insertions.

Also, I would appreciate examples on how to do insertions and especially deletions inside a join() loop. Insertions aren't that problematic because you usually aren't join()-ing over the component you're inserting into. But for deletion this is different.

I think that section would be much better if it addressed these issues. For instance, by giving an example using drain(), and a canonical example of non-lazily deleting entities from some component inside a loop without drain() (because maybe you don't want to remove all of them).

[jrmiller82]

Would love to see this too.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Feel free to comment if this is still relevant.

[torkleyy]

This seems still relevant; I'm thinking that maybe we could solve this by adding a demo.

[ldesgoui]

I can spend some time on this, can we agree on a broad set of changes?

What we have now:

• Chapter 06 (System Data) contains a small part about adding and removing components

What I assume we want:

• Chapter 06 focuses on System Data (add/removal of components is split out)
• A new chapter addresses common Component usecases

[torkleyy]

I'm not quite sure myself where this could fit into. In any case, putting all component related docs in the same place + referencing those sections seems like a good idea.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Feel free to comment if this is still relevant.

[atsuzaki]

I'm not quite sure myself where this could fit into. In any case, putting all component related docs in the same place + referencing those sections seems like a good idea.

I know this is closed but this is still really relevant. Like, we still haven't figured out how to do this: and a canonical example of non-lazily deleting entities from some component inside a loop without drain()

I'd like to spend time working on this. Would need some sort of guidance though on what exactly to add though. Maybe we can agree on a list of stuffs to write about? cc: @torkleyy