Continuous Band Track

[Eric Patterson]

I wanted to ask those familiar with the continuous band track development how far along is it, generally?

Also, when I go to run "demo_MBS_tracks.exe", displays a printout of the belt wrap algorithm converging, but nothing is displayed despite other demos working.  It seems like it's somewhere in the track assembly as I've been starting to dig to debug it, but I thought someone might have some ideas for what to check for sure in terms of packages, etc., if it doesn't run right out of the box.

Thanks!

[Eric Patterson]

Oops... I meant "demo_VEH_M113_Band.exe".  It does not display any visuals.  I'm curious about possible causes (Irrlicht works fine) as well as the state of the continuous band track development.  Thanks!

[Mike Taylor]

Eric,

I'm guessing my previous reply was lost with the multiple messages.

"demo_VEH_M113_Band" is mainly a proof-of-concept model for a track system composed of a mix of rigid tread blocks connected by flexible, nonlinear finite element based, webs.  As far as I'm aware, it has not been touched for many years.  

It appears that this demo stopped working correctly at some point in the recent past in the main development branch.  I'm seeing similar issues when I tested it recently with Visual Studio on Windows.  It will be some time before I'll have a chance to dive into this.  In the meantime, you could try pulling the Chrono 9.0 release and trying the demo in that version of the code.  The result should look something like the following image.

Best Regards,

Mike

[Radu Serban]

Hi Eric,

 

Indeed, this was a bug I introduced a while ago while doing some refactoring of Chrono::Vehicle.

I pushed a fix (commit 542b16c in the main branch of the git repository).

 

--Radu

 

From: projec...@googlegroups.com <projec...@googlegroups.com> On Behalf Of Mike Taylor
Sent: Wednesday, May 14, 2025 3:21 AM
To: ProjectChrono <projec...@googlegroups.com>
Subject: [chrono] Re: Continuous Band Track

 

Eric,

 

I'm guessing my previous reply was lost with the multiple messages.

 

"demo_VEH_M113_Band" is mainly a proof-of-concept model for a track system composed of a mix of rigid tread blocks connected by flexible, nonlinear finite element based, webs.  As far as I'm aware, it has not been touched for many years.  

 

It appears that this demo stopped working correctly at some point in the recent past in the main development branch.  I'm seeing similar issues when I tested it recently with Visual Studio on Windows.  It will be some time before I'll have a chance to dive into this.  In the meantime, you could try pulling the Chrono 9.0 release and trying the demo in that version of the code.  The result should look something like the following image.

Best Regards,

 

Mike

 

On Thursday, May 8, 2025 at 3:18:46 PM UTC-5 drflysu...@gmail.com wrote:

Oops... I meant "demo_VEH_M113_Band.exe".  It does not display any visuals.  I'm curious about possible causes (Irrlicht works fine) as well as the state of the continuous band track development.  Thanks!

On Tuesday, April 22, 2025 at 4:25:21 PM UTC-4 Eric Patterson wrote:

I wanted to ask those familiar with the continuous band track development how far along is it, generally?

 

Also, when I go to run "demo_MBS_tracks.exe", displays a printout of the belt wrap algorithm converging, but nothing is displayed despite other demos working.  It seems like it's somewhere in the track assembly as I've been starting to dig to debug it, but I thought someone might have some ideas for what to check for sure in terms of packages, etc., if it doesn't run right out of the box.

 

Thanks!

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[Eric Patterson]

Many thanks, Mike and Radu.  I appreciate the info, Mike, and your pushing the fix, Radu.