部分代码如图所示
var force = d3.layout.force()
.nodes(root.nodes)
.links(root.edges)
.size([width,height])
.linkDistance(200)
.charge(-1500)
.start();
var edges_line = svg.selectAll("line")
.data(root.edges)
.enter()
.append("line")
.style("stroke","#660066")
.style("stroke-width",1);
var edges_text = svg.selectAll(".linetext")
.data(root.edges)
.enter()
.append("text")
.attr("class","linetext")
.attr("dx",text_dx)
.attr("dy",text_dy)
.text(function(d){
return d.relation;
});
// 圆形图片节点（人物头像）
var nodes_img = svg.selectAll("image")
.data(root.nodes)
.enter()
.append("circle")
.attr("class", "circleImg")
.attr("r", radius)
.attr("fill", function(d, i){
//创建圆形图片
var defs = svg.append("defs").attr("id", "imgdefs");
var catpattern = defs.append("pattern")
.attr("id", "catpattern" + i)
.attr("height", 1)
.attr("width", 1)
catpattern.append("image")
.attr("x", - (img_w / 2 - radius))
.attr("y", - (img_h / 2 - radius))
.attr("width", img_w)
.attr("height", img_h)
.attr("xlink:href", d.image)
return "url(#catpattern" + i + ")";
})