Add position rect to camera

[alejcas]

Camera has rects for viewport and projection but not for position.
I use a lot the camera rect to obtain the map space rect currently on screen.

[DragonMoffon]

Because the Camera2D can rotate, it doesn't make sense to return a rect as you have defined it. This is a useful feature, but there is a few changes I would recomend.

[DigiDuncan]

Like this idea a lot. Would love to see it get in, and as the person spearheading Rect, I definitely love hearing that it's getting practical use!

[alejcas]

Like this idea a lot. Would love to see it get in, and as the person spearheading Rect, I definitely love hearing that it's getting practical use!

Using Rects as if there was no tomorrow!

[DragonMoffon]

nice!

[Cleptomania]

I'm just sanity checking that the behavior makes sense.

If the camera can rotate, should the returned Rect be accounting for the rotation(as in, returning a Rect that is rotated) as opposed to returning a larger rect that covers the entire region of the actual rotated Camera plane?

I'm not sure what the behavior actually should be for that or which one makes more sense, but just wanna make sure if this has been considered or not.

[DigiDuncan]

I'm just sanity checking that the behavior makes sense.

If the camera can rotate, should the returned Rect be accounting for the rotation(as in, returning a Rect that is rotated) as opposed to returning a larger rect that covers the entire region of the actual rotated Camera plane?

Rects can not be rotated by design, so it essentially has to for this behavior to do anything.

However, for a large amount of use cases, having this information is helpful (games where the camera does not meaningfully rotate, which is a lot of them.) But providing something if the camera rotates makes sense too.

[Cleptomania]

I'm just sanity checking that the behavior makes sense.
If the camera can rotate, should the returned Rect be accounting for the rotation(as in, returning a Rect that is rotated) as opposed to returning a larger rect that covers the entire region of the actual rotated Camera plane?

Rects can not be rotated by design, so it essentially has to for this behavior to do anything.

However, for a large amount of use cases, having this information is helpful (games where the camera does not meaningfully rotate, which is a lot of them.) But providing something if the camera rotates makes sense too.

Lot of discussion about this topic happened on discord, but the TL;DR is that Rect does seem to be what other engines(namely Godot and Unity) are using for an Axis Aligned Bounding Box. There was a worry that Rect not having rotation would be misleading and not in line with other industry standard engines, but that seems to not be the case.

Regardless that's not super relevant to this PR, so this is probably fine as is.