function measureRimInclination(obj)
  % Glenoid rim inclination is the angle between the glenoid infero-superior line 
  % and the line that goes through Trigonum Spinae and Spino-Glenoid notch.
  %
  % obj.measureInferoSuperiorLine() must have been run before measuring the 
  % glenoid retroversion.
  TStoSG = Vector(obj.scapula.trigonumSpinae, obj.scapula.spinoGlenoidNotch);

  rimInclinationRotation = vrrotvec(obj.inferoSuperiorLine.vector, TStoSG.vector);

  % Unlike glenoid retroversion angle, glenoid rim inclination method doesn't set
  % the sign of this angle which should be compared to the rotation axis alignment
  % with scapular PA axis. However, this alignement depends on the shoulder side.
  % It's assumed that glenoid infero-superior line will always be aligned with
  % scapular IS axis, and TStoSG line will always be aligned with scapular ML
  % axis. Therefore glenoid rim inclination angle will always be a positive number.
  obj.rimInclination = rad2deg(rimInclinationRotation(4));
end