gioneves opened a new issue, #20585:
URL: https://github.com/apache/echarts/issues/20585

   ### What problem does this feature solve?
   
   The current implementation of the series-sunburst chart in ECharts only 
supports a startAngle property to control the starting angle of the chart. 
However, it lacks an endAngle property, which makes it impossible to limit the 
chart to specific angular ranges. This restriction is a significant limitation 
for use cases where users need to create semi-circular or custom-arc Sunburst 
charts, such as in dashboards, radial layouts, or data visualizations with 
overlapping elements that require precise angle control.
   
   For example, in a dashboard, users might want to align a semi-circular 
Sunburst chart with other half-circle visualizations or restrict the chart to a 
specific angular range to avoid overlapping with other components.
   
   ### What does the proposed API look like?
   
   The proposed API introduces a new endAngle property to the series-sunburst 
configuration. The endAngle property would define the ending angle (in degrees) 
of the Sunburst chart, similar to how the startAngle currently defines the 
starting angle.
   
       option = {
         series: [
           {
             type: 'sunburst',
             data: [
               { name: 'A', value: 10 },
               { name: 'B', value: 20 },
               { name: 'C', value: 30 }
             ],
             radius: ['20%', '90%'],
             startAngle: 225, // Start at 225 degrees
             endAngle: -45,  // End at -45 degrees (semi-circle)
             label: {
               show: true,
               position: 'outside'
             }
           }
         ]
       };
        
   The startAngle determines where the Sunburst chart begins, in this case at 
225 degrees.
   The endAngle determines where the Sunburst chart ends, in this case at -45 
degrees, creating a custom arc.
   
   This configuration produces a partial circular chart that starts at 225° and 
ends at -45°, covering an arc of 270°. It follows a similar angle configuration 
to the series-gauge component (default angle settings).


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