cmass: Centre of mass

Differentiably compute a weight’s centre of mass.

Functionality is available that operates on the “intrinsic” mesh grid coordinates of a tensor (cmass(), cmass_reference_displacement_grid()) or that takes the last axis of a tensor to correspond to different locations and accepts a second argument that indicates explicitly the coordinates of each location (cmass_coor(), diffuse(), cmass_reference_displacement()).

• cmass_coor: Centre of mass, any coordinates
  • cmass_coor()
• cmass: Centre of mass, array coordinates
  • cmass()
• diffuse: Diffuseness around centre of mass
  • diffuse()
• Displacement from a reference centre of mass
  • cmass_reference_displacement()
  • cmass_reference_displacement_grid()