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[Janek Kozicki <1796883@xxxxxxxxxxxxxxxxxx>]

moved from https://bugs.launchpad.net/yade/+bug/1796883 to
https://gitlab.com/yade-dev/trunk/issues/44

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https://bugs.launchpad.net/bugs/1796883

Title:
  STL import breaks serialization; O.load; Facet must have exactly 3
  vertices (not 6)

Status in Yade:
  New

Bug description:
  Ubuntu 16.04 in virtual machine on windows host
  affects yade package and yadedaily 2018.02b-201447edfd~xenial 

  Hi,
  there is a problem when you import an stl file to your simulation, save the simulation via O.save and O.load afterwards.
  You will get a
  RuntimeError: Facet must have exactly 3 vertices (not 6)

  Here is the example (stl file from some example is attached, I tried different stls):
  #!/usr/bin/python
  # -*- coding: utf-8 -*-
  from yade import ymport
  O.engines=[
      ForceResetter(),
      InsertionSortCollider([Bo1_Sphere_Aabb()]),
      InteractionLoop(
          [Ig2_Sphere_Sphere_ScGeom()],        # collision geometry
          [Ip2_FrictMat_FrictMat_FrictPhys()], # collision "physics"
          [Law2_ScGeom_FrictPhys_CundallStrack()]   # contact law -- apply forces
      ),
      # Apply gravity force to particles. damping: numerical dissipation of energy.
      NewtonIntegrator(gravity=(0,0,-9.81),damping=0.1)
  ]
  O.save('before.xml.bz2')
  O.bodies.append(ymport.stl('baraban.stl'))
  O.save('after.xml.bz2') 
  O.load('before.xml.bz2')
  print "loaded before successfully"
  O.load('after.xml.bz2')
  print "loaded after successfully"

  Cheers Alex

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