d3.js中的分层图

我目前使用Graphviz来显示控制流程图。基本上，（可缩减）控制流图是DAG加上指向前面层中的节点的一些边。后边缘不应影响节点放置。

I am currently using Graphviz for visualizing control flow graphs. Basically, a (reducible) control flow graph is a DAG plus some edges which point back to nodes in the previous layers. The latter edges should not affect node placement.

目前， dot 绘制的图形相当漂亮，容易添加交互性（例如折叠，滚动，缩放），这对于非常大的图形的分析是无价的。因此，我选择d3.js作为最成熟和功能丰富的图形库。

Currently, dot draws the graphs pretty neatly, but it lacks an easy way to add interactivity (e.g. folding, scrolling, zooming), which is priceless for analysis of very large graphs. Therefore, I selected d3.js as the most mature and feature-rich graphing library.

我确定有一个简单的方法来绘制分层图（ dot 但我似乎不认识它。我怎么做？

I'm pretty sure that there is an easy way to draw layered graphs (as does dot) in d3.js, but I don't seem to recognize it. How do I do that? If this helps, I already perform dominator analysis on my CFG.