Match curve doesn't work against arcs?

Rhino Rhino for Windows
1

Starting out with this shape of tangent arcs:

image
image1305×712 221 KB

I now want to match the red segments so that they are curvature instead:

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image802×702 62.8 KB

But the result is this:

image

Geometric Continuity reports:

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So, they started out as tangent, and after the match it’s now positional. Is this another example of Rhino not working well with rational things? I think there should at least be some sort of warning here, and not just a silent fail… (also, not just an “out of tolerance” warning, but a why as well, since in this case, the reason is rational to non-rational matching?)

arcs-to-g2-fail.3dm (148.2 KB)

2 Likes
2

Which version of Rhino are you running? I’m on 7.11.21264.11001, 2021-09-21 and I get:

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3

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image

4

This seems to work fine here so far.

-Pascal

5

I get repeatable, inconsistent results. For example:

MatchInconsistent
MatchInconsistent965×1036 34.8 KB

6

OK, thanks, I’ll dig some more - so far I get repeatable g2 ness…

In a new session of Rhino - I cannot get G2 even once - something clearly wrong here - thanks, y’all.
RH-65729 Match: inconsistent matching arcs

-Pascal

2 Likes
7

FYI:

Rhino 7 SR11 2021-9-21 (Rhino 7, 7.11.21264.11001, Git hash:master @ 17b325a2a0e317a9818050aaccd3d68ee8e46d71)
License type: Commercial, build 2021-09-21
License details: Cloud Zoo

Windows 10.0.19043 SR0.0 or greater (Physical RAM: 64Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2080 Ti (NVidia) Memory: 11GB, Driver date: 8-5-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 471.68
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0

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: 8-5-2021
Driver Version: 30.0.14.7168
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 11 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Orca3D V2\Orca3D.rhp “Orca3D” 2.0.22.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.11.21264.11001
C:\Program Files\Rhino 7\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 7\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.11.21264.11001
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.11.21264.11001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\Alerter.rhp “Alerter”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.11.21264.11001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.11.21264.11001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Users\dcock\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\PanelingTools\2021.3.2.446\PanelingTools.rhp “PanelingTools”
C:\Users\dcock\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\SectionTools\2021.4.21.831\SectionTools.rhp “SectionTools”