Jestem nowicjuszem w D3. Używam wykresu ukierunkowanego na siłę. Chcę dodać dwa różne typy kształtów w miejscach węzła.

Mój syn obserwuje:

{
  "nodes":[
    {"name":"00:00:00:00:00:00:00:01","group":0,"shape":1},
    {"name":"00:00:00:00:00:00:00:02","group":1,"shape":1},
    {"name":"00:00:00:00:00:00:00:03","group":2,"shape":1},
    {"name":"00:00:00:00:00:00:00:11","group":0,"shape":0},
    {"name":"00:00:00:00:00:00:00:21","group":1,"shape":0},
    {"name":"00:00:00:00:00:00:00:31","group":2,"shape":0},
    {"name":"00:00:00:00:00:00:00:32","group":2,"shape":0},
    {"name":"00:00:00:00:00:00:00:12","group":0,"shape":0},
    {"name":"00:00:00:00:00:00:00:22","group":1,"shape":0}
  ],
  "links":[
    { "source":  0,  "target":  0,  "value":  5 },
    { "source":  1,  "target":  1,  "value":  5 },
    { "source":  2,  "target":  2,  "value":  5 },
    { "source":  3,  "target":  0,  "value":  5 },
    { "source":  4,  "target":  1,  "value":  5 },
    { "source":  5,  "target":  2,  "value":  5 },
    { "source":  6,  "target":  2,  "value":  5 },
    { "source":  7,  "target":  0,  "value":  5 },
    { "source":  8,  "target":  1,  "value":  5 }
  ]
}

Jeśli wartość kształtu wynosi 1, to narysuj okrąg, a jeśli wartość kształtu wynosi 0, narysuj prostokąt. Link przykładowy wymuszonego wykresu to:http://bl.ocks.org/mbostock/4062045

Próbowałem przykładowego łącza JSFiddle:http://jsfiddle.net/mayurchavda87/Sc2xC/3/