Gumball Align to Object used to show me the Gumball arrow at the center of the object. From some time ago it started aligning the arrow on one corner of the object… Why is this the case and how can I change it back so that I can gumball from the object center?
Hi, right click the Gumball (hold the button for a second) - you will get a menu. Click Reset gumball.
-David
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The gumball is still stuck on one corner 
This appears to be new behavior with the Gumball and extrusion objects. I don’t know if it is a recent bug or some sort of “desired” behavior that has been newly introduced. In any case it is not “desirable” IMO…
@someone/mcneel? (@pascal)
@yc525 - you can fix this by converting your extrusions to polysurfaces using _ConvertExtrusion on your existing extrusions; also you can turn off extrusion creation by running _UseExtrusions and setting it to “polysurfaces”
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Probably something for @mikko to look at.
This is not new behavior. Looks like this is how it originally worked, and again since early 2011 when “align to object” mode was added. It worked the same in V5 too.
Does that make it ‘work as designed’ @mikko?
I didn’t design it so I don’t know.
Yep, this is how ‘Align to object’ works on extrusions.
-Pascal
my super janky work around is copy + paste then select the ‘extra’ object too. rhino then centres the gumball on the pair. scale as required and delete the ‘extre’ one. but if there is an actual centre gumball on object without having to ‘relocate gumball’ and re draw / position it, i’d like to know?
Hi Dan - on extrusion objects, the by object alignment is not in the center. CPlane alignment would be.
-Pascal
I’m struggling to align the Gumball tool’s axis with a tube’s natural direction. The misalignment makes manual positioning challenging. How can I adjust the Gumball so its axis (z, y, or x) matches the tube’s natural axis for better control? Thanks for any tips!
o
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Hello- the GumballRelocate, snapping to the Cen of one of the end circles, and to the circle itself for X and Y is how I think I would do this.
-Pascal
Why can’t we have a normal gumball/gizmo that aligns to the minimum oriented bounding box of the object?
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Everyone I know that uses Rhino (many co workers and friends) always have a comment about the Gumball not doing what it is expected.
If needed, I will create a separate thread linking all the posts I can find, and give visual examples of situations where Gumball does not perform as required (not a bug, just badly designed) but this issue has been mentioned multiple multiple times.
Every other 3D software has a Gizmo that re-aligns as you transform the object.
You can try this with a simple box and rotate it. Rhino’s just doesn’t.
Big disappointment to see this is till the case with Rhino 8, which is a huge contradiction given the emphasis on new Push and Pull tools as well as aligned Cplane.
I am not a developer but i use multiple 3D packages and software.
My intuition is that under the hood there is some cached data about the transformations applied to an object and these transformations help align the Gizmo without having to constantly calculate minimum oriented bounding box.
In case geometry has no cache, such as imported geometry, then it can calculate it and start caching transformations.
I don’t know guys, just look how it works in Cinema 4D for example.
Also these changes would GREATLY aid SubD workflows and it blows my mind how this has never been addressed.
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Not sure if that reply is for me or for @jsbzh
I will assume the later, I know how to set the gumball to object. And I know what I am talking about when I said it does not work as a proper Gizmo should most of the time.
Point in case, I rotate a box and it no longer works. Almost 2024 btw.
Reply was for original post.
Got it.
Does not work on my end though? (Rhino 8).
It does work if Gumball is enabled and you rotate without deselecting the cylinder.
But for some reason even when set to world it works as set to object.
All this changes when you deselect the cylinder and select it back and no matter what you do you are stuck with World.
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Don’t know what to say, it works for me. I set to Gumball (Object) and the gumball now aligns with the different objects I have in my scene. I don’t know if it matters, but I am on service release candidate 8.1 of last week.
Hmm, well lets hope its just me.
I remember Gumball having issues but not as basic as these. I recently uninstalled all Rhino and reinstalled only Rhino 8 so I assume there should be no problem on that end. Neither on differing version.
I will screen record tomorrow. I remember having a discussion with Pascal about this some years ago too. But it used to work more or less ok with basic Nurbs geometry.