2D dxf export, hidden lines not dashed

Mods TechDraw
1

Hello,
I want to export this part as pdf/dxf. dxf is needed for import into AutoCAD.
When exporting the pdf (right click on page), the hidden lines remain dashed (zoom in pdf),
but for dxf-export the lines are not dashed. I tried shape2Dview from arch-wb too.
Do I miss something?
Thanks Thomas

Discussion started in german forum:
https://forum.freecadweb.org/viewtopic.php?f=13&t=69494

File:
Rahmenknoten_Mast.FCStd (130 KB)
OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.27428 (Git)
Build type: Release
Branch: master
Hash: 27460358508a2057e0ec57a418641435f12628dd
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: German/Germany (de_DE)
techdrawDXF.JPG

2

Confirmed.

There is a potential workaround, but it is a bit involved:

  1. Export the current page to DXF.
  2. Change all hidden HLR parameters to false.
  3. Create a separate DXF.
  4. Move to AutoCAD.
  5. Open the first DXF and change the linetype of all lines to hidden.
  6. Insert the 2nd DXF and explode the block.
  7. Optionally use the OverKill command to get rid of duplicate lines (adjust its settings to ignore linetypes). Depending on the result you may have to change the order of the previous steps: Open the 2nd DXF and insert the 1st DXF.
    td-hidden-lines-dxf.png
3

The dxf export function lives in the App part of TechDraw, This allows dxf exporting in “headless” mode. The downside is that the App part doesn’t know about line attributes. Also, I’m not sure if the actual dxf exporter in the Import module supports line attributes. I will have a look.

The pdf export function lives in the Gui part of TechDraw, which does know about line attributes.

The dxf export could probably be enhanced for this, but it would not be a trivial task.