convert iv file to dae file which is always empty

[albertfq]

Hi all,

I'm new to FreeCAD and meshes and I'm trying to convert iv files to dae files. With import option, I can import and visualize the models very well. After I export the file with 'dae' format, the file is 1kb and when I import again the generated dae file, it's nothing in the FreeCAD. I also tried to export other format such as 'obj', it's empty too.

Basic Info:
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4 (GitTag)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 980bf9060e28555fecd9e3462f68ca74007b70f8
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

Btw I saw some blog that it might be issue with python 3.6.6, how can we install FreeCAD with python 2.7? If this is the case.

[sgrogan]

I also tried to export other format such as 'obj', it's empty too.

I can create a Part Cube and a Mesh cube and export to .dae and Open in another file.
Can you post a sample iv that has this behavior?

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4 (GitTag)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 980bf9060e28555fecd9e3462f68ca74007b70f8
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

My exported .dae file

coltt.dae

(7.03 KiB) Downloaded 120 times

[albertfq]

Thks a lot. Here in the attachment is the .iv file that I had trouble with.

[wmayer]

Thks a lot. Here in the attachment is the .iv file that I had trouble with.

The .iv file format is used by OpenInventor (Coin3d) to store the scene graph of the visual representation of the actual data model. Now if you load the .iv file then you just get the visual representation but you don't automatically get the data model, i.e. the mesh object in your case.

You should give MeshLab a chance because this supports quite a lot of mesh formats including the .iv format.

[albertfq]

Thks a lot. Here in the attachment is the .iv file that I had trouble with.

The .iv file format is used by OpenInventor (Coin3d) to store the scene graph of the visual representation of the actual data model. Now if you load the .iv file then you just get the visual representation but you don't automatically get the data model, i.e. the mesh object in your case.

You should give MeshLab a chance because this supports quite a lot of mesh formats including the .iv format.

Thanks for the tip. I tried meshlab but unfortunately it also cannot import .iv files.

[wmayer]

If you are still interested I have found a way to convert the .iv file into an STL file. This STL can be loaded and converted into an other mesh format.

[wmayer]

Since git commit 601ac707b207c6 it's possible to do:

Code: Select all

import MeshGui
MeshGui.convertToSTL("input_file.iv", "output_file.stl")

Reload the STL and save it into another format.