This is a shot of the main window showing 50 particles.
The main drawing area is a gtk_drawing_area object. This shot was taken on a Cygwin platform.

This is a shot of the add dialog. The various particle
parameters are entered into gtk_spin_button's.

This is the remove dialog. The main feature is a scrollable gtk_clist
object. Here particles may be selected and removed in the course of a

This is the random add dialog. Here many particles may be added with random parameters defined by ranges.