rhino 7:
autocad:
buglines.dwg (20.0 KB)
buglines.3dm (154.2 KB)
I just exported this from Rhino 7 using the default settings to dwg and it’s fine. Not sure this is a bug, what settings are being used upon export?
testbug.dwg (27.1 KB)
i checked the settings they seem fine. try with the attached ini
Hello - most lilkely a tolerance problem - the segment is .04 units long and tolerance is .01, that is too close for comfort. The curve round-trips ok in Rhino inj my test, but I do not know what the target application does with it.
-Pascal
i will test that. i did not even think about tolerances during 2d drafting in metres 
so tolerance setting affects export to dwg?
Hello - it seems not to in a round trip to Rhino, but there’s a line and arc simplify tolerance in the export, and I do not know what the target application does - but it looks to me like there is a tolerance issue someplace.
-Pascal
i tried a roundtrip with a good tolerance set
somethin strange is going on. you see IPE 200 profiles are deformed.
Rhino 7 SR10 2021-8-24 (Rhino 7, 7.10.21236.11001, Git hash:master @ c1c1a0be2c74a937d5bb85aafdab68e56ed1ab43)
License type: Commercial, build 2021-08-24
License details: Cloud Zoo
Windows 10.0.19042 SR0.0 or greater (Physical RAM: 16Gb)
Computer platform: LAPTOP - Plugged in [100% battery remaining]
Hybrid graphics configuration.
Primary display: Intel(R) UHD Graphics 630 (Intel) Memory: 1GB, Driver date: 2-25-2020 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA GeForce GTX 1050 Ti with Max-Q Design (NVidia) Memory: 4GB, Driver date: 8-11-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 471.75
> Integrated accelerated graphics device with 4 adapter port(s)
- 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: 8-11-2021
Driver Version: 30.0.14.7175
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:\Program Files\Geometry Gym\Rhino3d\ggRhinoIFC.rhp “ggRhinoIFC” 1.7.58.0
C:\Program Files\Geometry Gym\Rhino3d\BullAnt.rhp “bullant” 1.4.4.0
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V7\VRayForRhino.rhp “V-Ray for Rhino”
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.10.21236.11001
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” 7.10.21236.11001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.10.21236.11001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\import_ACAD.rhp “AutoCAD file import: import_ACAD”
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” 7.10.21236.11001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.10.21236.11001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
my export setting.
testbug.ini (978 Bytes)
Hello - try with the simplify tolerance set lower - .005 say.
-Pascal