LIGGGHTS 2.1.2: (released 21 September 2012)
+ Andreas Aigner (JKU) added a first version of a hysteretic pair/gran/hooke/history/hysteresis style with cohesion. There is also a new tutorial case 'hysteresis' for that. Doc is to follow...
+ Andreas Aigner (JKU) also committed a patch for fix ave/euler/stress, improving support for triclinic boxes
+ Improved numerical round-off for reading STL files. Added an 'accuracy' keyword to fix mesh/surface so the user can control this. Also added an 'nneighs' keyword to dump mesh/vtk to check if neighbor topology is governed correctly. Thanks to Chris Stoltz (P&G) for sending cases that showed that there was room for improvement.
+ Re-work for particle distributions as defined by fix particletemplate/sphere. Now it supports 'constant', 'uniform mass', 'uniform number', 'gaussian number' and 'lognormal number' distributions.
+ Fixed a bug in compute wall/gran/local. Thanks to Tapan Sabuwala (U Illinois) for posting a testcase.
Improvements for fix insert/stream:
+ Firstly, a bug in the parallelization was fixed. Thanks to Rouven Weiler (BASF) for noting the problem.
+ Secondly, a 'parallel' keyword has been added to fix insert/stream which can improve insertion performance if the fix insert/stream extrusion extends across many processes. However, as this is normally not the case, this option if off per default.
However, there are some restrictions in 2.1.2 (see below) which will be relaxed over time:
+ region tetmesh is not yet available
+ 'all_in yes' is not yet available for fix insert/stream
+ fix breakparticle/force is not yet available