cesium 屏幕坐标和经纬度互转

1. 屏幕坐标到经纬度的转换

screenToGeoCoordinates(screenX, screenY, viewer)
{
   
   
  let ellipsoid = viewer.scene.globe.ellipsoid
  // 使用camera.pickEllipsoid来获取与屏幕坐标相交的点
  let cartesian = viewer.camera.pickEllipsoid(new Cesium.Cartesian2(screenX, screenY), ellipsoid)

  if (!cartesian)
  {
   
   
    console.log('无法在屏幕坐标处找到交点')
    return null
  }