#8 Fixed a bug in IBEA

[Antonio J. Nebro]

A bug in IBEA has been fixed (thanks for Dimo Brockhoff for reporting it)

[Antonio J. Nebro]

The calcHypervolumeIndicator() method contains this piece of code:

{
  if (a < b)
  {
     volume = calcHypervolumeIndicator(p_ind_a, null, d - 1, maximumValues, minimumValues) *
     (b - a) / r;
     volume += calcHypervolumeIndicator(p_ind_a, p_ind_b, d - 1, maximumValues, minimumValues) *
     (max - b) / r;
  }
  else
  {
     volume = calcHypervolumeIndicator(p_ind_a, p_ind_b, d - 1, maximumValues, minimumValues) *
     (max - b) / r;
  }
}

The bug is in the last sentence (the b should be a). The correct code then is:

{
  if (a < b)
  {
     volume = calcHypervolumeIndicator(p_ind_a, null, d - 1, maximumValues, minimumValues) *
     (b - a) / r;
     volume += calcHypervolumeIndicator(p_ind_a, p_ind_b, d - 1, maximumValues, minimumValues) *
     (max - b) / r;
  }
  else
  {
     volume = calcHypervolumeIndicator(p_ind_a, p_ind_b, d - 1, maximumValues, minimumValues) *
     (max - a) / r;
  }
}