GuiObject.ClipsDescendants (Rotation Support)

[ROBLOX_MANNN]

Personally I think it’s been a feature in the realm of “needed” since Rotation was first introduced in GUIs.

-GuiObjects that are Rotated under other GuiObjects with ClipsDescendants set to true, will be clipped as opposed to the current behavior (no clipping support)

To be perfectly honest my formal argument For this request is that GUIs that are rotated while parented to a GuiObject with ClipsDescendants set to true, will not produce the correct behavior (rendering wise) that comes with being a Descendant.

My Informal reason is that Minimaps would actually be a viable thing to script on ROBLOX. Not that they aren’t possible now, it’s just that they look crudy without the proper behavior.

• For
• Against

[ScriptOn (Genya)]

I believe @zeuxcg explained once or twice that it’d be super performance intensive.

That being said, I’d still love to have it regardless.

[buildthomas]

There have been a few threads on this already if you’re looking for more info:

Make GUI Rotation effected by ClipsDescendants

Apparently it isn’t… Even when out of the Frame the object is still visible which shouldn’t be possible.

GUI rotation issue with ClipsDescendants

When a GUI’s rotation is not set to default (0), It does not follow any ClipsDescendants settings. This is really annoying and ruins a lot of possibilities with effects. I’ve seen on other posts about this issue, but none have addressed a way to avoid this issue. Either fix, or help me find a solution to rid of this problem - it’s driving me crazy! Thanks!

ClipsDescendants for Rotated Frames

'Ello! I’ve been trying to make a few various kinds of fun projects for my game (right now making a statistics thingy :P), however I noticed that ClipsDescendants does not work with rotated frames. [image] I feel like it would be nice to add this functionality to guis or maybe add the possibility of primitive shapes such as triangle or circles.

Rotation and ClipsDescendants

[size=2](If this was already posted, sorry.)[/size] What issue are you having? Describe what is happening when the bug occurs. Describe what you would normally expect to occur. –Rotate GUI objects do not work with ClipsDescendants property. Normally, anything outside of the parent border is not rendered (like the red ImageLabel). If it is rotated, it will render the entire object. Does the bug happen 100% of the time? –By what I tested, yes. If so, are there steps that reproduce the b…

I found these by searching for “rotation clipsdescendants” using the search tool in the top right. (It’s a cool feature, use it!)

Here’s the reply by @zeuxcg:

@zeuxcg

Stravant is correct - the reason this feature is not implemented atm is the requirement to change the UI code to work with arbitrary convex polygons everywhere instead of axis-aligned rectangles.

We can’t use scissor rectangles since they don’t provide full clipping support anyway as mentioned above; the only complete solution that does not need convex polygon clipping is stenciling, but it would require us to de-optimize current rendering code that aggressively merges geometry for visible UI elements to avoid CPU overhead.

We may end up implementing correct clipping some day but it would require a carefully optimized approach that only switches to slow convex clipping when absolutely necessary.

[ROBLOX_MANNN]

@buildthomas

I found these by searching for “rotation clipsdescendants” using the search tool in the top right. (It’s a cool feature, use it!)

Bumping old posts does less justice than getting the current opinion of the current community.

That being said, thank you for the references anyways

[sparker22]

The point was that threads on this have already been made making this thread pointless. There isn’t any disagreement to ClipsDescenants rotation support. Previous threads have proven this. The point is the staff have already given an answer to the request which is a performance issue.

This will be the case no matter how many threads are made.

[GuestCapone]

Why not just modify the gui code to make those “cutoff” rectangles local to the frame’s rotation? basically each frame has its own world space?

[stravant]

Yes… that’s roughly how it would likely be done (Converting coordinates by giving each rotated object a “CFrame” and doing clipping / event handling in that space), but the difficulty of actually doing so is anything but a “just”. At the lowest level the rending system just renders triangles, it has no notion of complex clipping etc. Even once you’ve done a world <-> local space conversion, you still have the problem of clipping an arbitrary convex polygon vs a box, and have the same problem for event handling (to determine what GUI element the mouse is inside of / what to send events to).

Not to mention that significant rotated regions with clipping are likely to look really bad in a lot of situations due to the lack of anti-aliasing on GUIs, so Roblox may not want to encourage the use of significant amounts of rotated GUIs with that in mind.

Not to mention that adding rotated GUIs likely splits the GUI system into two code-paths, because you still want the current fast path for unrotated things, only resorting to the slow path for rotated hierarchies with clipping in them.

Overall it would certainly be a large project to make it happen no matter how you put it.

[Dev_Unbound]

I didn’t know that we couldn’t clip rotated GUIs… guess I’m gonna have to come up with an entirely new concept for the part of my game’s HUD that I’m working on…