Rendering your CFD results - general discussion

cfdnewbie · August 28, 2012, 11:41

Just one thing: if you get something done, please post back and share!

SH_P · September 4, 2012, 01:59

OK! I cleaned up your code (can be found on Blender.org forum).
Now, for Cycle implementation. I've found out how to correct the texture (vertex color paint) in cycle engine. However, after hours of struggling with python, I couldn't find a way to translate the process to code...

If you are interested I can describe the problem for you, maybe you can find a way!

BTW, I have tow question:
1. How did you automate the export process in Paraview? Do you have a code or something?
2. How did you make your animation using the resulting still images?

Thanks

cfdnewbie · September 4, 2012, 02:59

Quote:

Originally Posted by SH_P

OK! I cleaned up your code (can be found on Blender.org forum).
Now, for Cycle implementation. I've found out how to correct the texture (vertex color paint) in cycle engine. However, after hours of struggling with python, I couldn't find a way to translate the process to code...

If you are interested I can describe the problem for you, maybe you can find a way!

BTW, I have tow question:
1. How did you automate the export process in Paraview? Do you have a code or something?
2. How did you make your animation using the resulting still images?

Thanks

Thanks and great that you are posting back! I looked at the cycles stuff as well and got as far as you did (I could import the x3d and set the vertex color in blender) but I couldnt find a way to do it in python....
If you have any ideas or want to share what you discovered, please do!

about your questions:
1) yes, I do have some lines of python code and I run paraview in batch mode (pvbatch), it just goes through all my files, imports them, applies a layout (forgot what they are called in paraview...statefile??) and then exports it as x3d

2) I used mencoder under linux...

all the best and thanks again for contributing!

SH_P · September 4, 2012, 03:07

If you can find a way to add a node in blender (equivalent to: "add>inpute>attribute" in node editor) it is almost done, but I couldn't find a way to add this specific node (Attribute).

I have only one paraview session so I wouldn't need to load different files. All I want to do is to export the .x3d file in every frame change. Can you help me with its python code? I've never used python in paraview and have no idea how to do it.

Thanks

tptbd · September 5, 2012, 03:04

I am a new member on this forum. I think, i will get help from all member.

SH_P · September 9, 2012, 08:53

Quote:

Originally Posted by cfdnewbie

Just one thing: if you get something done, please post back and share!

Finally found the way to use Cycle! I explained it Blender forum.
Now we can do almost everything with Blender !!

BTW, Is Reynolds your real name?

>Soroush

cfdnewbie · September 9, 2012, 11:25

Awesome Soroush!
I will check it out in the coming days, unfortunately I'm so bogged down by work at the moment that I can't focus on the nicer things

But I will most certainly look it up!

Sorry for not replying to your paraview scripting problem, if you still need help with that, let me know and i can post the python I use!

all the best!

ps: no, reynolds is (sadly) not my real name!

SH_P · September 9, 2012, 12:41

No problem!
I Wrote a script that works fine, Actually, I rendered an animation of falling droplet simulated in Fluent as well!

The only problem is that my script uses time step counts (ViewTime command) which are all integer numbers. That is fine for the case of integer file names only.

Do you know how to get the the precise values of time steps and store them in an array? I tried some commands on the internet but none of them works.

Thanks,
>Soroush

cfdnewbie · September 9, 2012, 14:15

Quote:

Originally Posted by SH_P

No problem!
I Wrote a script that works fine, Actually, I rendered an animation of falling droplet simulated in Fluent as well!

cool! is the video available somewhere?

Quote:

The only problem is that my script uses time step counts (ViewTime command) which are all integer numbers. That is fine for the case of integer file names only.

Do you know how to get the the precise values of time steps and store them in an array? I tried some commands on the internet but none of them works.

Thanks,
>Soroush

hm, I'm not sure what you are asking here... do you mean in paraview? or blender?? Sorry, I am confused?!?!

SH_P · September 9, 2012, 14:48

I mean in Paraview. Consider a loaded case has time steps : 0.001, 0.002,... . I want a command to extract these time step values for the case and put them in a list.

Ps. I will upload the video on YouTube soon!

cfdnewbie · September 9, 2012, 15:01

where would you get the timesteps from? your filename? (So your filename might my something like "Solution_10.25000.vtu" with 10.25 being the time)?

That would work by doing sth like
end = filename.find('vtu')
time = filename[end-8:end-1]

maybe you would have to convert that to a number, but that should give you the time from your filename...

SH_P · September 9, 2012, 15:10

Thanks for your reply,

That could be one case. The other is the case in which I load my files into Paraview (All at the same time, such as a transient Ensight case) so the time step values should be extracted from the current session not from individual file names.
Here is the code I've found but it doesn't work. (Maybe it is a version issue):
I want to make an array like: "tsteps"
http://paraview.org/Wiki/ParaView/Py...ling_with_time

SH_P · September 10, 2012, 03:07

Found it mayself!

reeader = FindSource('case name')
tstrps = reader.TimestepValues

cfdnewbie · September 10, 2012, 05:43

awesome! I just looked at your nice tutorial on blender.org! thanks a lot, I will incorporate it into my code!

cfdnewbie · September 11, 2012, 03:20

and really looking forward to your video

SH_P · September 12, 2012, 05:34

Here it is! :

http://www.youtube.com/watch?v=DE5zCX9x_Ms
Not a very big deal... Just wanted to test some of the lighting and texturing capabilities!

cfdnewbie · September 12, 2012, 06:03

you sir, are my hero! That is very impressive! is it done with the blender render or cycles?

SH_P · September 12, 2012, 06:19

Thanks,
Its done by Blender engine.

hitechengineering · September 12, 2012, 06:20

Hi friends...I am new to this forum and want your support to understand and resolve CFD flow related problems in aerospace industry.

Regards
James.

markusrehm · August 12, 2013, 09:29

Hi cfdnewbie,

I am trying to import the my paraview x3d to blender but it is missing the color.
I suspect it is an issue importing the colors since I get the following warning:

"Warning: adding faces did not work! file is invalid, not adding UVs or vcolors

I saw a similar error posted here:

http://www.blender.org/forum/viewtop...5725593b68583a

Do you know a solution?

Thanks, Markus.

August 28, 2012, 11:41		#21
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	Just one thing: if you get something done, please post back and share! Nucleophobe likes this.

September 4, 2012, 03:07		#24
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	If you can find a way to add a node in blender (equivalent to: "add>inpute>attribute" in node editor) it is almost done, but I couldn't find a way to add this specific node (Attribute). I have only one paraview session so I wouldn't need to load different files. All I want to do is to export the .x3d file in every frame change. Can you help me with its python code? I've never used python in paraview and have no idea how to do it. Thanks julien.decharentenay likes this.

September 12, 2012, 05:34		#36
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	Here it is! : http://www.youtube.com/watch?v=DE5zCX9x_Ms Not a very big deal... Just wanted to test some of the lighting and texturing capabilities! cfdnewbie likes this.

September 12, 2012, 06:20	Hi!	#39
hitechengineering New Member James Camer Join Date: Sep 2012 Posts: 1 Rep Power: 0	Hi friends...I am new to this forum and want your support to understand and resolve CFD flow related problems in aerospace industry. Regards James.

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September 4, 2012, 01:59		#22
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	OK! I cleaned up your code (can be found on Blender.org forum). Now, for Cycle implementation. I've found out how to correct the texture (vertex color paint) in cycle engine. However, after hours of struggling with python, I couldn't find a way to translate the process to code... If you are interested I can describe the problem for you, maybe you can find a way! BTW, I have tow question: 1. How did you automate the export process in Paraview? Do you have a code or something? 2. How did you make your animation using the resulting still images? Thanks

September 5, 2012, 03:04		#25
tptbd New Member Throughput Join Date: Sep 2012 Posts: 1 Rep Power: 0	I am a new member on this forum. I think, i will get help from all member.

September 9, 2012, 11:25		#27
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	Awesome Soroush! I will check it out in the coming days, unfortunately I'm so bogged down by work at the moment that I can't focus on the nicer things But I will most certainly look it up! Sorry for not replying to your paraview scripting problem, if you still need help with that, let me know and i can post the python I use! all the best! ps: no, reynolds is (sadly) not my real name!

September 9, 2012, 12:41		#28
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	No problem! I Wrote a script that works fine, Actually, I rendered an animation of falling droplet simulated in Fluent as well! The only problem is that my script uses time step counts (ViewTime command) which are all integer numbers. That is fine for the case of integer file names only. Do you know how to get the the precise values of time steps and store them in an array? I tried some commands on the internet but none of them works. Thanks, >Soroush

September 9, 2012, 14:48		#30
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	I mean in Paraview. Consider a loaded case has time steps : 0.001, 0.002,... . I want a command to extract these time step values for the case and put them in a list. Ps. I will upload the video on YouTube soon!

September 9, 2012, 15:01		#31
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	where would you get the timesteps from? your filename? (So your filename might my something like "Solution_10.25000.vtu" with 10.25 being the time)? That would work by doing sth like end = filename.find('vtu') time = filename[end-8:end-1] maybe you would have to convert that to a number, but that should give you the time from your filename...

September 9, 2012, 15:10		#32
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	Thanks for your reply, That could be one case. The other is the case in which I load my files into Paraview (All at the same time, such as a transient Ensight case) so the time step values should be extracted from the current session not from individual file names. Here is the code I've found but it doesn't work. (Maybe it is a version issue): I want to make an array like: "tsteps" http://paraview.org/Wiki/ParaView/Py...ling_with_time

September 10, 2012, 03:07		#33
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	Found it mayself! reeader = FindSource('case name') tstrps = reader.TimestepValues

September 10, 2012, 05:43		#34
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	awesome! I just looked at your nice tutorial on blender.org! thanks a lot, I will incorporate it into my code!

September 11, 2012, 03:20		#35
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	and really looking forward to your video

September 12, 2012, 06:03		#37
cfdnewbie Senior Member cfdnewbie Join Date: Mar 2010 Posts: 557 Rep Power: 20	you sir, are my hero! That is very impressive! is it done with the blender render or cycles?

September 12, 2012, 06:19		#38
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	Thanks, Its done by Blender engine.

August 12, 2013, 09:29		#40
markusrehm Senior Member Markus Rehm Join Date: Mar 2009 Location: Erlangen (Germany) Posts: 184 Rep Power: 17	Hi cfdnewbie, I am trying to import the my paraview x3d to blender but it is missing the color. I suspect it is an issue importing the colors since I get the following warning: "Warning: adding faces did not work! file is invalid, not adding UVs or vcolors I saw a similar error posted here: http://www.blender.org/forum/viewtop...5725593b68583a Do you know a solution? Thanks, Markus.