Arcs can be anchored: {vertical: 0, horizontal: 0},
{vertical: 0.5, horizontal: 0.5} (the default),
{vertical: 1, horizontal: 1}
Arcs can be anchored: {vertical: 0, horizontal: 0},
{vertical: 0.5, horizontal: 0.5} (the default),
{vertical: 1, horizontal: 1}