Re: [sparta-users] [EXTERNAL] Re: Help

[Moore, S. <st...@sa...>]

FYI this pull request is now merged in the master branch of SPARTA. Please let us know if you see issues.

Stan
________________________________
From: Steve Plimpton <sj...@gm...>
Sent: Tuesday, January 27, 2026 5:23 PM
To: WUYONGXIN <183...@16...>
Cc: spa...@li... <spa...@li...>
Subject: [EXTERNAL] Re: [sparta-users] Help

Hi - I just posted a PR to the SPARTA GitHub repo which should fis the grid_refine.py tool.
It's output should now be usable by the read_grid command. You can try it out for your simulations.

Steve

On Mon, Jan 19, 2026 at 8:38 AM Steve Plimpton <sj...@gm...<mailto:sj...@gm...>> wrote:
Hi - it looks like the tools/grid_refine.py tool has not been updated to use the newer grid file format
used by the read_grid, write_grid, adapt_grid, and fix_adapt commands.

So we can update the python file to use the common format.

Re: rotation, I'm not sure what you mean.  Do you mean in the context of grid adaptation?
Or just to include rotation effects in collisions?

Steve

On Mon, Jan 19, 2026 at 2:50 AM WUYONGXIN <183...@16...<mailto:183...@16...>> wrote:
Dear sparta：
     My name is Yongxin Wu, and I am a student from ‌Zhejiang University from China.

    When using the grid_refine function in SPARTA to mesh a 3D geometry, a mesh file in parents format is generated. This file cannot be read by the read_grid command. May I ask how to convert it into a cells format file that the program can use? Additionally, if I want to account for the rotational effect of the wall, should I use the rotate command in surf_collide?

    Thank you for your time.
    Best regards


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