How do i add two different shapes to D3 forced directed graph based on shape field value?

Question

I am newbie to D3. I am using force directed graph. I want to add two different type of shapes at node's places.

My json is following:

{
  "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 }
  ]
}

If shape value is 1, then draw circle, and if shape value is 0, then draw rectangle. Force directed graph example link is: http://bl.ocks.org/mbostock/4062045

I have tried example link JSFiddle: http://jsfiddle.net/mayurchavda87/Sc2xC/3/

Answer 1

You can do this, as shown in e.g. this example, by using a symbol generator and path elements instead of SVG elements for specific shapes. The code to add shapes becomes

var node = svg.selectAll(".node")
  .data(data.nodes)
  .enter().append("path")
  .attr("class", "node")
  .attr("d", d3.svg.symbol()
    .type(function(d) { return d3.svg.symbolTypes[d.s]; }))
  .style("fill", function(d) { return color(d.group); })
  .call(force.drag);

Then you also need to change your tick handler to change the transform attribute of the path elements:

node.attr("transform", function(d) {
    return "translate(" + d.x + "," + d.y + ")";
});

Complete jsfiddle here.