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Implementation of Volume-interacting Level-Set DEM or VLS-DEM (1/3)

Danny van der Haven requested to merge VLS-DEM(1/n) into master

Hi all!

This is the first of several merge requests implementing volume-based interactions for level-set particles. Full detail can be found in this publication and the associated supplementary information.

This merge request in particular:

  • Reference added to YADE doc
  • Level set particle properties for axis-aligned bounding ellipsoids (AABEs). These are necessary to improve the computation speed of the volume interactions.
  • Two additional functions, not restricted to the level set grid, to get the normal and distance of the level set. This is needed for particle-wall interactions.

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