如何在圆圈之间均匀分割d3链接(How to evenly split d3 links between circles)

 我有以下数据集 
 
var data = { nodes: 
   [ { addr: '1',
       address: '1',
       x: 100,
       y: 200 },
     { addr: '2',
       address: '2',
       x: 200,
       y: 0 },
     { addr: '3',
       address: '3',
       x: 200,
       y: 150 },
     { addr: '4', address: '4', x: 200, y: 240 },
     { addr: '5', address: '5', x: 200, y: 360 }
  ],
  links: 
   [ { source: 0, target: 1 },
     { source: 0, target: 2 },
     { source: 0, target: 3 },
     { source: 0, target: 4 } ] }
 
 目前看起来像这样： 
 
  
 
 我试图找到一个公式，允许我为任何给定数量的圆计算正确的Y值（在合理范围内，如果有1,2或10个圆，公式应该有效）。 
 
 我想尝试这样的事情： 
 
  
 
 这看起来很对称。 
 
 第一个圆圈（蓝色）的我的X和Y是已知的并且是静态的。 

I have the following data set
 
var data = { nodes: 
   [ { addr: '1',
       address: '1',
       x: 100,
       y: 200 },
     { addr: '2',
       address: '2',
       x: 200,
       y: 0 },
     { addr: '3',
       address: '3',
       x: 200,
       y: 150 },
     { addr: '4', address: '4', x: 200, y: 240 },
     { addr: '5', address: '5', x: 200, y: 360 }
  ],
  links: 
   [ { source: 0, target: 1 },
     { source: 0, target: 2 },
     { source: 0, target: 3 },
     { source: 0, target: 4 } ] }
 
Which currently looks like this:
 
 
I'm trying to find a formula that will allow me to calculate the correct Y value for any given number of circles (within reason, the formula should work if there are 1, 2 or even 10 circles).
 
I'm trying to get to something like this:
 
 
That will look symmetrical.
 
My X and Y for the first circle (in blue) are known and are static.

原文：https://stackoverflow.com/questions/35050109