【D3.js数据可视化系列教程】（三十一）-- 力导向图之分子式
其实就是简单的力导向图
只是加载了json文件
设置了分层的颜色
设置化学键分隔线
//(1)平方根比例尺
var radius = d3.scale.sqrt()
.range([0, 6]);//值域
(2)连线是两个圆半径之和+20那么长
.linkDistance(function(d) {//(2)连线是两个圆半径之和+20那么长
return radius(d.source.size) //数据源里的size就是半径
+ radius(d.target.size) + 20;
});
(3)只要连线大于2就加一条分隔线
//怎么添加多条分隔线呢？
link.filter(function(d) {//基于数据过滤的选择。
return d.bond > 1;
}).append("line")
.attr("class", "separator");//添加一条分隔线
(4)根据圆圈的种类的大小设置大小
node.append("circle")
.attr("r", function(d) {
return radius(d.size); //(4)根据圆圈的种类的大小设置大小
})
.style("fill", function(d) {
return color(d.atom); //根据圆圈的种类设置颜色
});
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>testD3-29-Molecule.html</title>
<script type="text/javascript" src="http://localhost:8080/spring/js/d3.v3.js"></script>
<style type="text/css">
.link line {
stroke: #696969;
}
/* 分隔线的格式 透明的 */
.link line.separator {
stroke: #fff;
stroke-width: 2px;
}
.node circle {
stroke: #000;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
pointer-events: none;
}
</style>
</head>
<body>
<script type="text/javascript">
var width = 960,
height = 500;
var color = d3.scale.category20();
//(1)平方根比例尺
var radius = d3.scale.sqrt()
.range([0, 6]);//值域
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.size([width, height])
.charge(-400)
.linkDistance(function(d) {//(2)连线是两个圆半径之和+20那么长
return radius(d.source.size) //数据源里的size就是半径
+ radius(d.target.size) + 20;
});
d3.json("http://localhost:8080/spring/D3data/graph.json", function(graph) {
force
.nodes(graph.nodes)
.links(graph.links)
.on("tick", tick)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("g")
.attr("class", "link");
link.append("line")
.style("stroke-width", function(d) { return (d.bond * 2 - 1) * 2 + "px"; });
//(3)只要连线大于2就加一条分隔线
//怎么添加多条分隔线呢？
link.filter(function(d) {//基于数据过滤的选择。
return d.bond > 1;
}).append("line")
.attr("class", "separator");//添加一条分隔线
//常规的添加节点
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("g")
.attr("class", "node")
.call(force.drag);
//常规的添加圆点
node.append("circle")
.attr("r", function(d) {
return radius(d.size); //(4)根据圆圈的种类的大小设置大小
})
.style("fill", function(d) {
return color(d.atom); //根据圆圈的种类设置颜色
});
node.append("text")
.attr("dy", ".35em")
.attr("text-anchor", "middle")//在圆圈中加上数据
.text(function(d) { return d.atom; });
//常规的打点
function tick() {
link.selectAll("line")
.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
node.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
}
});
</script>
</body>
</html>
{
"nodes": [
{"atom": "C", "size": 12},
{"atom": "C", "size": 12},
{"atom": "C", "size": 12},
{"atom": "N", "size": 14},
{"atom": "H", "size": 1},
{"atom": "O", "size": 16},
{"atom": "O", "size": 16},
{"atom": "H", "size": 1},
{"atom": "H", "size": 1},
{"atom": "H", "size": 1},
{"atom": "H", "size": 1},
{"atom": "H", "size": 1},
{"atom": "H", "size": 1}
],
"links": [
{"source": 0, "target": 1, "bond": 1},
{"source": 1, "target": 2, "bond": 1},
{"source": 1, "target": 3, "bond": 1},
{"source": 2, "target": 5, "bond": 4},
{"source": 2, "target": 6, "bond": 1},
{"source": 1, "target": 4, "bond": 1},
{"source": 3, "target": 10, "bond": 1},
{"source": 3, "target": 11, "bond": 1},
{"source": 0, "target": 7, "bond": 1},
{"source": 0, "target": 8, "bond": 1},
{"source": 0, "target": 9, "bond": 1},
{"source": 5, "target": 12, "bond": 1}
]
}