i make a tool utilities, an converter of 2D AutoCAD DXF to CalculiX GraphiX FBD files called dxf2fbd (password: calculix.discourse.group). this small code modification and adaptation are based on works of David Colignon from GMSH source codes.
current features:
support lines, arch & circle objects
a circle will be split automatically to four arch objects
Z-offset to place at some elevation
merge coincident nodes with a coordinate tolerances
Hopes it will be useful to create base of geometry to extrude or revolve in making of three dimensional models.
Please, register on the GitHub. It would be cool if you could publish your amazing converter on the https://github.com/calculix group. Let me know if you’d like to join the group.
Hello xyont,
thank you for making your converter available. Your converter runs probably only on windows. Would it be possible for you to make it available on linux? And I would say that Mr. Mirzov’s proposal of using his github location is a good idea since no login would be necessary to download from that location.
Invitation sent, please, approve it. Then in your ‘dxf2fbd’ project go to Settings -> Options -> Danger Zone -> Transfer ownership. Click on ‘Transfer’ button, then type ‘calculix’ as user. Project will move to Calculix organization. All your permissions will be kept, so do not afraid. Old URL will be kept also, new URL will be github.com/calculix/dxf2fbd.
Just a hint:
You can mesh the geometry after you created a surface, optionally increased the divisions and assigned an element type.
div all mult 10
qsur
a // ‘all’ mode
r r // rectangle which covers all lines
l // select all lines
g // generate
plus sa all
elty all tr6u
mesh all
plus f all
hi, great to see CGX can auto detected inner holes boundary.
is above result (tr6u) generated auto by Tetgen mesher? i try to reproduce using another simpler models. for now i seek quad dominate by Netgen mesher, reading the documentation it has not implemented yet. since qu8 perform better (CCX docs) is it possible in CGX for the next future?
No, you need the tetgen or netgen mesher only for generating tets. And so far it is not planned to implement a qu8 auto-mesher. You would have to subdivide the structure in four sided surfaces and use the regular mesher (qu8).
thanks are due to David Colignon and previous implementations, here I’m only makes a small modification to adapt with CalculiX.
translate or convert back of fbd files to dxf seems not an easy task. may possible only with some external libraries cause of dxf complexity itself. these problem can be reduce with another methods using generate script files, to be honest not all CAD software supported these file types.
