This modifier determines the number of neighbors of each particle which are within
a given cutoff radius. This is the so-called coordination number of a particle.
The modifier stores the results in the
Coordination particle property.
In addition, the modifier also computes the radial pair distribution function (RDF) of the particle system. The pair distribution function is normalized by the number density of particles (i.e. total number of particles divided by the simulation cell volume).
The current program version cannot compute partial pair distribution functions, which take into account the type of particles. If this is a program feature you are interested in, please let the developer of OVITO know.