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7 April 2020 at 09:20 in reply to: [SOLVED] indices of ROI in python scene #15663

Simon
Member

Thanks a lot @Hugo

7 April 2020 at 09:04 in reply to: [SOLVED] indices of ROI in python scene #15661

Simon
Member

I could think off 2 .pyscn files:

1st .pyscn
-create part of my scne with the roi
-initialize it
-animate for on time step
-get my indices, save them somehow

2nd .pyscn
-import indices somehow
-continue/finish my createscene process

Or is there already some more clever approach to this?

7 April 2020 at 08:52 in reply to: [SOLVED] indices of ROI in python scene #15660

Simon
Member

Thanks @Hugo,

I understand. But if I need the the list of indices in the creation of my scene how can I do this?
Is there something possible like:
– createScene() (until I need initialization)
– initialize()
– continue with createScene() ?

31 March 2020 at 18:31 in reply to: [SOLVED] How to import numpy in python scripting of SOFA? #15610

Simon
Member

Hi @Zahra,

thanks for your detailed reply. Now I know what you have meant. I am glad I’ve solved my issues as well with pip installing numpy into my standard python27. Which thanks to @jnbrunet I can now verify is the python instance that my SOFA is relying on.

Thanks to both of you
[SOLVED again]

30 March 2020 at 14:46 in reply to: [SOLVED] How to import numpy in python scripting of SOFA? #15583
Simon
Member
Hi @jnbrunet,

thanks for the fast reply, in the meantime I have installed python 2.7 and pip installed numpy into that. sys.prefix is the one I needed to check.

Output in the runSofa console window:

[INFO] [SceneCheckerVisitor] Finished validating node “root”.
```
C:\Python27

C:\Users\swtouch\SOFA\v19.12.00\bin\runSofa.exe

['', 'C:/Users/swtouch/SOFA/v19.12.00/plugins/SofaPython/lib/python2.7/site-packages', 'C:\\WINDOWS\\SYSTEM32\\python27.zip', 'C:\\Users\\swtouch\\Anaconda2\\Lib', 'C:\\Users\\swtouch\\Anaconda2\\DLLs', 'C:\\Python27\\Lib', 'C:\\Python27\\DLLs', 'C:\\Python27\\Lib\\lib-tk', 'C:\\Users\\swtouch\\SOFA\\v19.12.00', 'C:\\Users\\swtouch\\SOFA\\v19.12.00\\bin', 'C:\\Python27', 'C:\\Python27\\lib\\site-packages']

[INFO]    [SceneCheckerVisitor] Validating node "root" with checks: [SceneCheckAPIChange, SceneCheckDuplicatedName, SceneCheckMissingRequiredPlugin, SceneCheckUsingAlias]
```
Thanks
Simon
30 March 2020 at 11:45 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15581

Simon
Member

Hi @damien-marchaluniv-lille1-fr,

now it is working. I have forgotten to get a python27 + numpy for the DeFrost SOFA version to work.

Now I can progress.
Thanks

30 March 2020 at 10:24 in reply to: [SOLVED] How to import numpy in python scripting of SOFA? #15580

Simon
Member

Hi @Zahra,

I am having the same problem as you had. Good to see you have solved that.

– What do you mean by the default python? I have Anaconda2, Anaconda3 and a clean python 2.7, which one is the default? How do I find out?

– How can I find out which python my SOFA is using? I am so far using the precompiled SOFA binaries.

– How to change the default python? Has this something to do with building SOFA or is this some system setting. I am using Windows 10.

Thanks in advance
Simon

25 March 2020 at 13:06 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15554

Simon
Member

I assume what I need to change in my use of TransformEngine is something from that post:

https://www.sofa-framework.org/community/forum/topic/rotation-orientation-of-a-rigid-model/

In my case Rigid at (2,0,0). I have to adopt my .py to get a local rotation, as this is what I want.

Question: The TransformEngine is always a transformation referring to the global reference frame at (0,0,0)?

This is what I assume from the behaviour of:

rigid_frame_rotation.pyscn in:

https://github.com/swunsch/sofa-help/tree/master/05_rotating_beam/quest_transform_engine

25 March 2020 at 10:32 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15553

Simon
Member

Hi @Hugo,

okay cool, can I see your corresponding .pyscn file + .py(for the rotation, if you do so)?

I prepare another question because I’ve come up with something where my problem originates. maybe…

Thank you

25 March 2020 at 08:20 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15548

Simon
Member

maybe I’ve messed up my TransformEngine I’ll have to check that first…

25 March 2020 at 08:12 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15547

Simon
Member

Hi @Hugo,

aha ok, I understand it is not an error it’s a warning. So what I’ve build so far is the right way for my needs? And the fixedConstraint is not working properly in this case? Or have I done something wrong?

Maybe the TransFormEngine and the Constraint don’t work together well. I’ll try something in this direction, but in general I will need a way to prescribe the rotation of the Rigid3D in a time dependent manner, while its position is fixed.

I can’t see the picture, but I know the behaviour is strange.

Thanks
Simon

24 March 2020 at 13:52 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15535

Simon
Member

Hi @Hugo,

again I’ve Problems with the forum, I’ve written a reply but it’s not listed in this post. But I get an E-mail, that Simon has posted a new reply. And in this mail I see my post. So I try again with this reply.

I’ve adopted your suggested MechanicalMatrixMapper.pyscn example to my needs.

See:
https://github.com/swunsch/sofa-help/tree/master/05_rotating_beam/quest_1_2

But I don’t get the fixedConstraint to work now. I get the error:

[WARNING] [FixedConstraint(Fix)] Can not find the topology, wont be able to handle topological changes

23 March 2020 at 20:01 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15529

Simon
Member

@damien-marchaluniv-lille1-fr

could it be the / and \ in the path strings?

23 March 2020 at 20:00 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15528
Simon
Member
sorry for the delay…

@damien-marchaluniv-lille1-fr

with the precompiled “DeFrost” Version of SOFA I get following erros, when running your example code. The “plugins/SoftRobots/docs/tutorials/FirstSteps” Tutorial however runs with no problem. What could be the problem?
```
[ERROR]   [PythonScript] ImportError: cannot import name _distributor_init
  File "stlib_example_damien.pyscn", line 8, in createScene
    from stlib.physics.mixedmaterial import Rigidify
  File "C:/Users/swtouch/SOFA/SOFA_v19.06.99_custom_Win64_v8.1/plugins/STLIB/python\stlib\physics\mixedmaterial\__init__.py", line 17, in <module>
    from rigidification import Rigidify
  File "C:/Users/swtouch/SOFA/SOFA_v19.06.99_custom_Win64_v8.1/plugins/STLIB/python\stlib\physics\mixedmaterial\rigidification.py", line 25, in <module>
    from splib.numerics import Vec3, Quat, sdiv
  File "C:/Users/swtouch/SOFA/SOFA_v19.06.99_custom_Win64_v8.1/plugins/STLIB/python\splib\numerics\__init__.py", line 38, in <module>
    import numpy
  File "C:\Users\swtouch\Anaconda2\lib\site-packages\numpy\__init__.py", line 140, in <module>
    from . import _distributor_init
```
6 March 2020 at 18:37 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15301

Simon
Member

Hi @Damien, Hi @Hugo,

thanks for your help, I will have a try at your suggestions.

4 March 2020 at 22:32 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15284

Simon
Member

Thanks @Hugo,

it’s going in the right direction. Sadly my earlier have not been posted (somehow the FORUM and me having some digitial issues) but this is not a problem because we have skipped alot of bad scenes from my side I think.

So I am saying it again now. Good to have you back in the forum, without you it’s not the same.

And on goes the journey.
I modified the scene:
https://github.com/swunsch/sofa-help/blob/master/05_rotating_beam/quest_1_1/beam_rot_16_rigi_bilat_face.scn

And I am seeing too much movement/flexibility in the constraint:

I want to make the constraint stiffer or somehow reduce this violation. Which parameters can be adjusted?

4 March 2020 at 14:38 in reply to: [SOLVED] RigidMapping from Rigid3d to only some particles of FEMbody #15277

Simon
Member

oops..
and from https://www.sofa-framework.org/community/forum/topic/rigid-multibody-modeling-in-sofa/

maybe I had an overall solver missing.

https://github.com/swunsch/sofa-help/blob/master/05_rotating_beam/quest_1_1/beam_rot_12_ctrl_rigid_attach.scn

Looks much better now. Now I guess I have to adjust my rotation speed.
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Simon

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