Source node of the link.
For a link in a Cartesian coordinate system, the two element array contains the coordinates [x, y].
For a radial link, the two element array contains the coordinates [angle, radius]. The angle is stated in radians, with 0 at -y (12 o’clock). The radius measures the distance from the origin ⟨0,0⟩.
Target node of the link.
For a link in a Cartesian coordinate system, the two element array contains the coordinates [x, y].
For a radial link, the two element array contains the coordinates [angle, radius]. The angle is stated in radians, with 0 at -y (12 o’clock). The radius measures the distance from the origin ⟨0,0⟩.
An interface describing the default Link Data structure expected by the Link and LinkRadial generators.