How to get the display extent??
There’s no way to get the display extent in Cesium because it’s generally not useful in a 3D globe. For example, a view of the horizon will return a huge extent even though most of it is in the distance and very small in terms of pixel size. If you search the mailing list, there are conversations about it, some of which contain sample code for doing it yourself in views that completely contain the earth.
If you would like to detail what you are actually trying to do, we can provide some recommendations for how to do it.
thanks, i have got the code for getting the extent from the forum.
在 2015年4月20日星期一 UTC+8上午10:26:40，Matthew Amato写道：