我想将包布局和强制布局的最佳功能组合到我的图表中。我期待使用包布局将气泡打包/包装成圆形组,并从力布局中获取拖放/碰撞/重力特征。包装/包装圆的半径不应该是静止的。
我有pack layout implemented here和force layout implemented here。
我现在的想法是使用上面的小提琴代码进行力布局,并在将SVG附加到主体后添加一个圆圈,然后在其中添加气泡。
然而,在执行此操作时,我收到错误:
Uncaught TypeError: Cannot read property 'each' of undefined // line # 91 in JS
基本上,我希望这组气泡以循环方式排列。我如何实现这一目标?
JS:
var data = {
name: "layout",
children: [
{name: "AxisLayout", size: 6725},
{name: "BundledEdgeRouter", size: 3727},
{name: "CircleLayout", size: 9317},
{name: "CirclePackingLayout", "size": 12003},
{name: "DendrogramLayout", "size": 4853},
{name: "ForceDirectedLayout", "size": 8411},
{name: "IcicleTreeLayout", "size": 4864},
{name: "IndentedTreeLayout", "size": 3174},
{name: "Layout", "size": 7881},
{name: "NodeLinkTreeLayout", "size": 12870},
{name: "PieLayout", "size": 2728},
{name: "RadialTreeLayout", "size": 12348},
{name: "RandomLayout", "size": 870},
{name: "StackedAreaLayout", "size": 9121},
{name: "TreeMapLayout", "size": 9191}
]
};
var margin = {
top: 0,
right: 0,
bottom: 0,
left: 0
},
width = 400 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
var n = data.children.length,
m = 1,
padding = 6,
radius = d3.scale.sqrt().range([0, 12]),
color = d3.scale.category10().domain(d3.range(m)),
x = d3.scale.ordinal().domain(d3.range(m)).rangePoints([0, width], 1);
var nodes = d3.range(n).map(function () {
var i = Math.floor(Math.random() * m), //color
v = (i + 1) / m * -Math.log(Math.random()); //value
return {
radius: radius(v),
color: color(i),
cx: x(i),
cy: height / 2,
};
});
nodes.forEach(function(item, index){
item.radius = 20;
});
console.dir(nodes);
var force = d3.layout.force()
.nodes(nodes)
.size([width, height])
.gravity(0)
.charge(0)
.on("tick", tick)
.start();
var svg = d3.select("body")
.append("svg")
.attr("width", diameter)
.attr("height", diameter)
.append("g")
.append("circle")
.attr("cx", diameter/2)
.attr("cy", diameter/2)
.attr("r", diameter/2)
.attr("fill", "red")
.attr("z-index", -1)
.append("g")
.attr("transform", "translate(2,2)");
var circle = svg.selectAll("circle")
.data(nodes)
.enter().append("circle")
.attr("r", function (d) {
return d.radius;
})
.style("fill", function (d,i) {
return "green";
})
.attr("z-index", 1)
.call(force.drag);
function tick(e) {
circle.each(gravity(.2 * e.alpha)) // error here
.each(collide(.5))
.attr("cx", function (d) {
return d.x;
})
.attr("cy", function (d) {
return d.y;
});
}
// Move nodes toward cluster focus.
function gravity(alpha) {
return function (d) {
d.y += (d.cy - d.y) * alpha;
d.x += (d.cx - d.x) * alpha;
};
}
// Resolve collisions between nodes.
function collide(alpha) {
var quadtree = d3.geom.quadtree(nodes);
return function (d) {
var r = d.radius + radius.domain()[1] + padding,
nx1 = d.x - r,
nx2 = d.x + r,
ny1 = d.y - r,
ny2 = d.y + r;
quadtree.visit(function (quad, x1, y1, x2, y2) {
if (quad.point && (quad.point !== d)) {
var x = d.x - quad.point.x,
y = d.y - quad.point.y,
l = Math.sqrt(x * x + y * y),
r = d.radius + quad.point.radius + (d.color !== quad.point.color) * padding;
if (l < r) {
l = (l - r) / l * alpha;
d.x -= x *= l;
d.y -= y *= l;
quad.point.x += x;
quad.point.y += y;
}
}
return x1 > nx2 || x2 < nx1 || y1 > ny2 || y2 < ny1;
});
};
}
答案 0 :(得分:1)
两个错误:
diameter
未定义tick
函数使用缓存的圆形变量,这很好。但该函数在变量初始化之前被调用,因此该函数尚不知道它。