yade-dev team mailing list archive

[Jan Stránský <honzik.stransky@xxxxxxxxx>]

Public bug reported:

When you use two different shapes and two different materials, it might
happen that IntreactionLoop ends with error [1]. It is because the
interaction might be swapped in IGeom stage (ok) and in IPhys stage (see
also the comment in [1], but in reality Ip2 can by non-symmetric).

Possible solutions:
1) define both Ip2_Mat1_Mat2 and Ip2_Mat2_Mat1
2) replace assert [1] (something like   if (swap) { I->functorCase.phys=physDispatcher->getFunctor2D(b2->material,b1->material,swap); swap=false })
3) make option 1) somehow automatic (using some macro?)

Pros and cons:
1) would mess the source code and documentation a bit, but otherwise I think it is ok
2) would it have some side effects? Is it ok for Law2 stage? etc etc?
3) maybe the best option if the solution is reasonable

cheers
Jan

[1] http://bazaar.launchpad.net/~yade-pkg/yade/git-trunk/view/head:/pkg/common/InteractionLoop.cpp#L116
[2] https://answers.launchpad.net/yade/+question/269315

** Affects: yade
     Importance: Low
         Status: New

** Changed in: yade
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1475844

Title:
  Swap problem in InteractionLoop

Status in Yade:
  New

Bug description:
  When you use two different shapes and two different materials, it
  might happen that IntreactionLoop ends with error [1]. It is because
  the interaction might be swapped in IGeom stage (ok) and in IPhys
  stage (see also the comment in [1], but in reality Ip2 can by non-
  symmetric).

  Possible solutions:
  1) define both Ip2_Mat1_Mat2 and Ip2_Mat2_Mat1
  2) replace assert [1] (something like   if (swap) { I->functorCase.phys=physDispatcher->getFunctor2D(b2->material,b1->material,swap); swap=false })
  3) make option 1) somehow automatic (using some macro?)

  Pros and cons:
  1) would mess the source code and documentation a bit, but otherwise I think it is ok
  2) would it have some side effects? Is it ok for Law2 stage? etc etc?
  3) maybe the best option if the solution is reasonable

  cheers
  Jan

  [1] http://bazaar.launchpad.net/~yade-pkg/yade/git-trunk/view/head:/pkg/common/InteractionLoop.cpp#L116
  [2] https://answers.launchpad.net/yade/+question/269315

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