hugetiny opened a new issue #12240: 官方webgl地球案例中为什么Z坐标要只取正的而且要取平方根？ URL: https://github.com/apache/incubator-echarts/issues/12240 ### Version 4.6.0 ### Steps to reproduce 官方案例：https://www.echartsjs.com/examples/zh/editor.html?c=scatter3d-globe-population&gl=1中 data = data.filter(function (dataItem) { return dataItem[2] > 0; }).map(function (dataItem) { return [dataItem[0], dataItem[1], Math.sqrt(dataItem[2])]; }); 为什么Z坐标要只取正的而且要取平方根？来源数据X,Y轴有正负，Z都是正数 ### What is expected? 请回答一下 ### What is actually happening? 应该是XYZ轴都有正负，对应一个三维坐标系 <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE --> <!-- This issue is in English. DO NOT REMOVE -->
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