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Re: [Question #689814]: How to use matchMaker on frictionAngle and etaRoll of CohFrictMat

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jérôme Duriez <question689814@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 10 Apr 2020 09:43:59 -0000
Reply-to: question689814@xxxxxxxxxxxxxxxxxxxxx
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Question #689814 on Yade changed:
https://answers.launchpad.net/yade/+question/689814

Jérôme Duriez proposed the following answer:
Hi,

If YADE says it does not exist, then it does not exist..

Q1
Looking at the Ip2 doc (or source code), eg [*], there indeed is no etaRoll MatchMaker attribute. You can try to define (slow) Python manual loops (remember interaction attributes are computed from Material properties only once, at the interaction creation), or modify source code if you want to controll etaRoll through a MatchMaker logic.

Q2
I did not get all your copy pastes, but, for frictAngle, you're more lucky since a frictAngle MatchMaker attribute does exist for Ip2_CohFrictMat_CohFrictMat_CohFrictPhys in recent YADE versions at least, see [*].

You have to use a more recent yade executable (are you using the
executable corresponding to the code source you're looking at ?..)

[*] https://yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_CohFrictMat_CohFrictMat_CohFrictPhys

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