unwrapping mesh

[manchild]

Hi all,

I used to be able unwrap cone mesh. Nom i missing this option ? what i doing wrong ?


FC 0.18

[looo]

I used to be able unwrap cone mesh. Nom i missing this option ?

can you post your freecad-version-info? This functionality is only available if FreeCAD is compiled with pybind11. For now this is only true for conda-builds. (AFAIK)

[chrisb]

Some questions back:
What do you expect?
Which version worked?
What exactly have you done?
Which version do you use now? Please add your FreeCAD info as described following the IMPORTANT link above.
What do you get now?

[chrisb]

It creates fancy results here for a 360° cylinder:

Bildschirmfoto 2019-01-04 um 12.46.58.png (15.24 KiB) Viewed 3151 times

It works well if I cut the mesh:

Bildschirmfoto 2019-01-04 um 12.46.31.png (16.42 KiB) Viewed 3151 times

.

OS: macOS 10.13
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15525 (Git)
Build type: Release
Branch: master
Hash: 1a7d3d9a37fe43468c8ac84590c1db53e2b2000a
Python version: 3.6.7
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)

[manchild]

I used to be able unwrap cone mesh. Nom i missing this option ?

can you post your freecad-version-info? This functionality is only available if FreeCAD is compiled with pybind11. For now this is only true for conda-builds. (AFAIK)

my version:
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15396 (Git)
Build type: Release
Branch: master
Hash: 5dee2fdfb38881a881493b2b610640bb7f3347c3
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0

i used to have option unwrap.
like in gif from user @looo:


i don't remember witch vesion it was.
now i don't have unwrap button

Screen Shot 01-04-19 at 12.07 PM.PNG (129.99 KiB) Viewed 3148 times

[manchild]

ok., I installed conda and now i'm able to unfolding. thanks guys

[looo]

It creates fancy results here for a 360°

I guess the wanted result are two concentric circles. The algorithm doesn't work good for such problems. There is the risk that triangles are overlapping and this makes the output of the relaxing step nonsense... There are alternative approaches which allow to unwrap also these kind of problems. The implemented approach is more suited for problems where not too much length differences between shape and unwrapped face occure.

So to get a better result a seam has to be added. For meshes a seam is simple a not connected mesh (Points on the seam occure twice in the vertices array) currently there is not a easy way to create seams for meshes in FreeCAD. So adding a little gap is the simpler way.

Python version: 2.7.14

this indicates that your library (most-likely) is not build with pybind11 (conda-based builds are all using python3). So the unwrap tools are not available for this version.

But I guess you already found a solution

[DDM]

Hello,

the unwrap feature in very useful. I downloead the last version of freecad from GIT, but I dont't see the command "Unwrap mesh" in the mesh workbench. I don't know if there is a procedure to activate the utility.
...@looo; @manchild can you help me?....
I need the feature to unwrap the surface of steel/aluminum plates for laser cutting....

Thanks,
Marco

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16093 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 690774c0effe4fd7b8d2b5e2fb2b8c8d145e21ce
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)

[looo]

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16093 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 690774c0effe4fd7b8d2b5e2fb2b8c8d145e21ce
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)

I am not sure why it is not included. All packages I create have it enabled. So maybe @sgrogan doesn't build with pybind11...

[DDM]

Hi Looo,

thanks for your reply.
So did you build your version with pybind11?
I am not expert.... ...The unwrap is too important...
Should I create a post in "open discussion"? What do you think?

Thanks, Marco