Under the Heart Shape interaction mechanism, the menu
options are arranged using the formula 
to determine a given
menu option's radius. The wedge between the two halves of the heart is pointed
in the direction of the mouse so as to ensure that the menu options closest to
the mouse are also the ones closest to the center of the circle, while the
options furthest from the mouse are also the furthest away from the center of
the circle.
Also, just like in the Pie Menu interaction mechanism, the menu option closest to
the mouse actually follows the mouse around, anticipating that it is the option
that the user wants.