SOURCE

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var color = d3.scale.category20();

var force = d3.layout.force().linkDistance(100).linkStrength(2).charge(-300).size([width, height]);

var svg = d3.select("body").append("svg").attr("width", width).attr("height", height);

// 背景
    d3.select("body").transition().style("background-color", "grey");
		d3.select("body").append("span").text("Hello, I am CR ");
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		"name": "王一鹤_"
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		"name": "中山邦夫"
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		"name": "Juno?浚?"
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		"name": "彭浩翔"
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		"name": "Y-star小?哥"
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		"group": "2",
		"name": "张佑荣"
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		"group": "2",
		"name": "杨幂"
	}, {
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		"name": "刘春"
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		"group": "2",
		"name": "张晗"
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		"group": "2",
		"name": "王才涛"
	}, {
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		"group": "2",
		"name": "赵元?-邻家王子"
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		"group": "2",
		"name": "左疼右爱_佐藤?"
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		"group": "2",
		"name": "竹书娱乐"
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		"group": "2",
		"name": "MP魔幻力量廷廷"
	}, {
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		"group": "2",
		"name": "MP魔幻力量嘎嘎"
	}, {
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		"group": "2",
		"name": "松冈"
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		"name": "何大叶"
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		"group": "2",
		"name": "?承?"
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		"group": "2",
		"name": "侯琳飞"
	}, {
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		"group": "2",
		"name": "邻家王子组合"
	}, {
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		"group": "2",
		"name": "小揪儿"
	}, {
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		"group": "2",
		"name": "程_孝明"
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		"name": "张阿牧"
	}, {
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		"group": "2",
		"name": "MP魔幻力量鼓手阿翔"
	}, {
		"count": 6,
		"group": "2",
		"name": "MP魔幻力量??"
	}, {
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		"group": "2",
		"name": "山田尚"
	}, {
		"count": 8,
		"group": "2",
		"name": "服装师喜一"
	}, {
		"count": 6,
		"group": "2",
		"name": "MP魔幻力量雷堡"
	}, {
		"count": 2,
		"group": "2",
		"name": "梅派-胡文阁"
	}, {
		"count": 2,
		"group": "2",
		"name": "魔女mok"
	}, {
		"count": 1,
		"group": "2",
		"name": "多多罗文化"
	}, {
		"count": 6,
		"group": "2",
		"name": "MP魔幻力量鼓鼓"
	}, {
		"count": 4,
		"group": "2",
		"name": "松冈伸弥"
	}, {
		"count": 6,
		"group": "2",
		"name": "王中磊"
	}, {
		"count": 4,
		"group": "2",
		"name": "real阿兰"
	}, {
		"count": 1,
		"group": "2",
		"name": "马戎戎"
	}, {
		"count": 2,
		"group": "2",
		"name": "MIYAVI_OFFICIAL"
	}, {
		"count": 4,
		"group": "2",
		"name": "欧弟"
	}, {
		"count": 2,
		"group": "2",
		"name": "李缨电影"
	}, {
		"count": 1,
		"group": "2",
		"name": "他回精神病院了"
	}, {
		"count": 1,
		"group": "2",
		"name": "benylan"
	}]
}


var nodes = graph.nodes.slice(),
	links = [],
	bilinks = [];

graph.links.forEach(function(link) {
	var s = nodes[link.source],
		t = nodes[link.target],
		i = {}; // intermediate node
    v = link.value;
	nodes.push(i);
	links.push({
		source: s,
		target: i
	}, {
		source: i,
		target: t
	});
	bilinks.push([s, i, t ,v ]);
});

force.nodes(nodes).links(links).start();

var link = svg.selectAll(".link").data(bilinks)
                  .enter().append("path")
                  .attr("class","link")
                  .style("stroke", function(d) { 
                    //console.log(d);
                    if(d[3] != null) { 
                      if(d[3] == "1"){
                      //  console.log(d[3]);
                        return color("1");
                      }else{
                        return color("2");
                      }
                    }; 
                  });

var node = svg.selectAll(".node").data(graph.nodes)
                  .enter().append("g")
                  .attr("class", "node")
                  .call(force.drag);

              //小圆   2.5-7.5
              node.append("circle").attr("class", "node")
              .attr("r", function(d){
                console.log(d.count/2)
                if(d.count/2<2){
                  return 2.5;
                }else{
                  return d.count/2;
                }
              })              
              .style("fill", function(d) {
          //      console.log(d);
          //      return color(d.group);
                return color(d.count+"")
              });


node.append("text")
                .attr("dx", 12)
                .attr("dy",".35em")
                .attr("class","text")
                .text(function(d) {
                return d.name
              });

force.on("tick", function() {
                link.attr("d", function(d) {
                  return "M" + d[0].x + "," + d[0].y + "S"
                      + d[1].x + "," + d[1].y + " "
                      + d[2].x + "," + d[2].y;
                });
                node.attr("transform",function(d) {
                  return "translate(" + d.x + "," + d.y + ")";
                });
              });
// });

 
.node {
/*  stroke: #fff;
  stroke-width: 1.5px;*/
}

.link {
/*  fill: none;
  stroke: #bbb;*/
  fill: none;
/*  stroke: #666;*/
  stroke-width: 0.5px;
}

text {
  pointer-events: none;
/*  font: 12px normal;*/
  font:  12px normal "宋体",Arial,Times;
  fill:  white;
}