[GitHub] [echarts] cyrna opened a new issue, #17642: [Bug] 关系图，环形，当节点为四个时，中间的连线曲率失效，都变成直线重叠在一起

[GitBox]

cyrna opened a new issue, #17642:
URL: https://github.com/apache/echarts/issues/17642

   ### Version
   
   5.3.3
   
   ### Link to Minimal Reproduction
   
   _No response_
   
   ### Steps to Reproduce
   
   option = {
          ...
           series: [
             {
               type: 'graph',
               layout: 'circular', 
              }，
               autoCurveness: 256,
               data: [
           {
             name: 'Node 1',
           },
           {
             name: 'Node 2',
           },
           {
             name: 'Node 3',
           },
           {
             name: 'Node 4',
           }
         ],  //数据任意只要是四个节点
               links:[
           {
             source: 0,
             target: 1,
            
             label: {
               show: true
             },
             
           },
           {
             source: 'Node 2',
             target: 'Node 1',
             label: {
               show: true
             },
            
           },
           {
             source: 'Node 1',
             target: 'Node 3',
             label: {
               show: true
             },
             
           },
            {
             source: 'Node 3',
             target: 'Node 1',
              label: {
               show: true
             },
             
           },
           {
             source: 'Node 2',
             target: 'Node 3'
           },
            {
             source: 'Node 2',
             target: 'Node 3'
           },
           {
             source: 'Node 2',
             target: 'Node 4',
              label: {
               show: true
             },
           },
            {
             source: 'Node 4',
             target: 'Node 2',
              label: {
               show: true
             },
           },
           {
             source: 'Node 1',
             target: 'Node 4',
              label: {
               show: true
             },
           },
           {
             source: 'Node 4',
             target: 'Node 1'
           }
         ],  //每个节点之间多条关系连线
           ]
   
         }
   
   ### Current Behavior
   
   
![1663032947130](https://user-images.githubusercontent.com/31532027/189788076-a14f253d-0f34-4507-be58-f4404caaec65.png)
   
   
   ### Expected Behavior
   
   中间的线也是正常的曲率，这种情况在其他个数的节点中均未发现，只有四个不行
   
   ### Environment
   
   ```markdown
   - OS:win10
   - Browser:chrome
   - Framework:Vue@3
   ```
   
   
   ### Any additional comments?
   
   _No response_


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