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[Garth Wells <663250@xxxxxxxxxxxxxxxxxx>]

** Changed in: dolfin
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/663250

Title:
  3D mesh refinement gives strange mesh sizes

Status in DOLFIN:
  Fix Released

Bug description:
  Something slightly peculiar seems to happen with 3d refinement. Refining
  a 1 x 1 x 1 Unit Cube 3 times gives largest cell diameter that is
  increasing (but smallest cell diameter  that is decreasing as expected).
  It does not seem to (only) be a bug in hmax()/hmin(), odd convergence
  rates are also observed. 
  Example:

  from dolfin import *

  mesh = UnitCube(1, 1, 1)

  for i in range(3):
      mesh = refine(mesh)

      print "Refinement level = ", i
      print "h_max = ", mesh.hmax()
      print "h_min = ", mesh.hmin()

  gives:

  Refinement level =  0
  h_max =  1.65831239518
  h_min =  0.866025403784
  Refinement level =  1
  h_max =  1.47901994577
  h_min =  0.433012701892
  Refinement level =  2
  h_max =  1.7809758561
  h_min =  0.216506350946