Bug - Simple Gumball Cut workflow


1/ Why does cutting with a line on surface does not work here, I have to extend the cutter to both sides. CreateSolid does just fine…
2/ Fantastic duplication of 4 polysurfaces when cutting vertically by a cutter that does not even pass through the top box ! And even with both sides the central piece os not cut in three pieces.
3/ All of this is done with the “Merge faces after extrude” option activated on the gumball, but it does not seem to merge faces at all. Does that only work with extrude ?

TestGumballCut.3dm (464.3 KB)

Rhino 8 SR0 2023-6-20 (Rhino WIP, 8.0.23171.14305, Git hash:master @ b92f7d293d9a041a6f2cbc4ed304f99aba992c88)
License type: Commerciale, build 2023-06-20
License details: Cloud Zoo
Expires on: 2023-08-04

Windows 11 (10.0.22621 SR0.0) or greater (Physical RAM: 16Gb)

Computer platform: LAPTOP - Plugged in [100% battery remaining]

Hybrid graphics configuration.
Primary display: Intel(R) Iris(R) Xe Graphics (Intel) Memory: 1GB, Driver date: 5-26-2022 (M-D-Y).
> Integrated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA GeForce RTX 3050 Ti Laptop GPU (NVidia) Memory: 4GB, Driver date: 1-28-2022 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 511.65
> Integrated accelerated graphics device (shares primary device ports)
- Video pass-through to primary display device

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 1-28-2022
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
C:\Users\maxim\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8 WIP\Plug-ins\SolidTools.rhp “SolidTools”
C:\Program Files\Rhino 8 WIP\Plug-ins\Commands.rhp “Commands” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 8 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoRoslyn.rhp “RhinoRoslyn” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCodePlugin.rhp “RhinoCodePlugin” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCPython.rhp “RhinoCPython” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.0.23171.14305
C:\Program Files\Rhino 8 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8 WIP\Plug-ins\Calc.rhp “Calc”
C:\Program Files\Rhino 8 WIP\Plug-ins\SectionTools.rhp “SectionTools”

double check that the curve is actually coplanar with your surface… that works here-

if it is coplanar, grab the latest v8 wip…it may have been tuned up recently.

I do have the latest WIP according to the latest post on the main thread - dates back to 8 days ago.

Your simple case also works fine on my side. Please notice that in my example where it fails, the cut line is partially aligned with some edges of the shape. Since both CreateSolid and WireCut are working there I would definitely expect the Gumball Cut to also produce a decent result.

weird… works here. I’m using the 6-27-2023 build
unless I’m missing something…

Sorry to insist but I think you missed my first video :slight_smile:

In your example (my second video), if you use the Boss option, the result faces are not merged even if the Gumball has this option enabled.

I tried to update my WIP which is from 2023-06-20 but it says no update is available. I guess I will retry that next Tuesday ?

ok, thanks for clarifying,
I misunderstood what i was seeing there…

I get a result if I pull the curves off the surface a bit and make them robustly overshoot the object.

Yes, I get this too. So this indicates cutters should be larger than the object when using the Gumball Cut, though CreateSolid and WireCut work perfectly without extending or moving the line.

This kinda lowers the point of Pushpull where the incentive is to draw everything on a face using snaps to edges… :disappointed_relieved:

1 Like

yep, I get that…and agree. Thanks for bringing this up.
@Joshua_Kennedy any ideas for a tune up here?


Thanks @magicteddy

RH-75854 Gumball Cut doesn’t give result

RH-75853 gumball cut creates duplicate of objects that are close to the extrusions

1 Like