实现MapControl与GlobeControl同步

 http://anshien.blog.163.com/blog/static/16996630820107309045137/

在GIS开发过程中，难免会遇到各种各样的需求，而作为程序员的我们就必须要想方设法把这些需求转换为功能实现，遇到奇怪的要求只能一边郁闷一边着手。。。

       抱怨到此为止，由此入正题。之前有遇到MapControl与PageLayoutControl的同步问题，这倒不是什么难题，ArcGISEngine的SDK中有实例介绍。但这次是MapControl与GlobeControl的同步。经过一段时间的研究，终是找到了解决办法，虽然有些笨拙，但为后来者提供学习还是可以的，望见谅！以下是实例代码：

            IScene scene = GlobeControl.Globe.GlobeDisplay.Scene;
            ISceneViewer sceneViewer = GlobeControl.Globe.GlobeDisplay.ActiveViewer;

            IGlobeCamera pGlobeCamera = sceneViewer.Camera as IGlobeCamera;
            IGlobeViewUtil pGlobeViewUtil = pGlobeCamera as IGlobeViewUtil;
            IEnvelope pEnvelope = new EnvelopeClass();

            pGlobeViewUtil.QueryVisibleGeographicExtent(pEnvelope);//得到GlobeControl的Extent
            
            IPoint minPoint = new PointClass();
            minPoint = GetProjectPoint(pEnvelope.XMin, pEnvelope.YMin);//获得从投影变换后的得到的平面坐标
            (minPoint as IZAware).ZAware = true;
            minPoint .Z = pEnvelope.ZMin;
            IPoint maxPoint = new PointClass();
            maxPoint = GetProjectPoint(pEnvelope.XMax, pEnvelope.YMax);
            (maxPoint as IZAware).ZAware = true;
            maxPoint.Z = pEnvelope.ZMax;
            IEnvelope GeoEnvelope = new EnvelopeClass();

            //设置平面Extent
            GetEnvelope(minPoint，maxPoint，out GeoEnvelope);

            //将得到的Envelope赋值给MapControl

             MapControl.ActiveView.Extent = GeoEnvelope;
             MapControl.ActiveView.Activate(MapControl.hWnd);
             MapControl.ActiveView.Refresh();

    简单介绍这段程序的使用，当在TapControl中从GlobeControl到MapControl的切换时，以上的代码就能实现位置同步。

     而从MapControl到GlobeControl即可用IGlobeCamera.SetToZoomToExtents方法就能够实现。