Superquadric Contact Detection

Submitted by aatxutegi on Wed, 03/20/2019 - 17:41

Hi,

I've been looking into the speed of the contact detection for SQ and it seems that for blockiness values of n1=2 and n2=8 the contact point is not found for some cases. The golden section algorithm doesn't converge and the Newton-Raphson runs all the iterations (100K) before taking the last value as the closest one to the solution.

I would greatly appreciate if anyone could give me any insight or ideas to make the golden section algorithm more robust.

To run the case LIGGGHTS must be compiled with the -DLIGGGHTS_DEBUG activated.

Kind regards,

Aitor

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Binary Data contactcase.tar_.gz1.34 KB

lumblab227 | Mon, 04/22/2019 - 14:28

Just do not use this feature for accurate contact-related calculation since a certain part of the code is not designed for that purpose.

However, if you would like to see some phenomenon induced by shape effect, you are welcomed to use it.