我们如何在树d3js中用不同的参数改变子节点，链接和节点位置的路径位置？

Question

我在d3js中使用了树形图，其中我被卡住，同时根据具有1个参数不同的子项定位一些路径，节点和链接以适合不同的位置。 所以，从中我们可以比较并且可以改变我们想要的任何东西，但是我无法在树形图d3js中找到比较的方法，并且在不同的方向上改变我的子节点路径和节点位。

我的json

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我对节点位置的路径......

link.enter().insert("path", "g")
            .attr("class", "link")
            .attr("marker-end", function(d) { 
                            return d.target.input == false ? "url(#arrowhead)" : "";
            })
            .attr("marker-start", function(d) { 
                    return d.target.input == true ? "url(#arrowdown)" : "";
            })
            .style("stroke", function(d) {
                    return d.target.input == false ? d.target.level : "red";
            })
            .attr("d", function(d) {

如果输入为true，那么我们需要改变路径的位置......

if(d.source.input == true)
{
    return_elbow = elbow(d);
    console.log("return_elbow", return_elbow);
    return return_elbow;
}
else
{
    var o = {x: source.x, y: source.y};
    return diagonal({source: o, target: o});
}

这里我添加路径并与输入进行比较...... 如果你知道的话，请查看代码和伙伴......请告诉我......