ARCGIS创建缩放到指定地点的动画

#region 创建缩放到指定范围的动画
        public static IAnimationTrack CreateZoomOverEnvelopAnimation(IGlobe pGlobe, IEnvelope pEnvelope)
        {
            // Set Mouse Cursor
            //IMouseCursor mouseCursor = new MouseCursorClass();
            //mouseCursor.SetCursor(2);
            IGlobeDisplay globeDisplay = pGlobe.GlobeDisplay;
            // QI to GlobeDisplayRendering Interface
            IGlobeDisplayRendering globeDisplayRendering = (IGlobeDisplayRendering)globeDisplay;

            // Get Elevation Multiplication Factor
            IUnitConverter unitConverter = new UnitConverterClass();

            // Get GlobeDisplay and Camera
            IGlobe globe = globeDisplay.Globe;
            IAnimationTracks animationTracks = (IAnimationTracks)globe;
            IGlobeCamera globeCamera = (IGlobeCamera)globeDisplay.ActiveViewer.Camera;
            
            // Create New Animation Track
            IAnimationTrack animationTrack = new AnimationTrackClass();
            IAnimationType animationType = new AnimationTypeGlobeCameraClass();
            animationTrack.AnimationType = animationType;

            #region 创建动画的第一点
            // Create First KeyFrame At Current Location
            IKeyframe keyframe1 = new GlobeCameraKeyframeClass();
            keyframe1.CaptureProperties((IScene)globe, globeCamera);
            animationTrack.InsertKeyframe(keyframe1, animationTrack.KeyframeCount);
            #endregion

            #region 创建动画的最后一点
            IKeyframe keyframe3 = new GlobeCameraKeyframeClass();
            double doubleY = (pEnvelope.YMax + pEnvelope.YMin) / 2;
            double doubleX = (pEnvelope.XMax + pEnvelope.XMin) / 2;
            //增加地形考虑，三角形计算观察点高度
            double doubleAltitide = GetObserverAltitide(globeCamera, pEnvelope) + GetGlobeElevation(globe.GlobeDisplay, doubleX, doubleY,true);// (pEnvelope.ZMax + pEnvelope.ZMin) / 2;// pEnvelope.ZMax;

            keyframe3.set_PropertyValueInt(0, 0);
            keyframe3.set_PropertyValueDouble(1, doubleY);
            keyframe3.set_PropertyValueDouble(2, doubleX);
            keyframe3.set_PropertyValueDouble(3, -1d * unitConverter.ConvertUnits(globeDisplayRendering.GlobeRadius, esriUnits.esriMeters, globe.GlobeUnits)); // (globeDisplayRendering.GlobeRadius / -1000));
            keyframe3.set_PropertyValueDouble(4, doubleY);
            keyframe3.set_PropertyValueDouble(5, doubleX);
            keyframe3.set_PropertyValueDouble(6, doubleAltitide);
            keyframe3.set_PropertyValueDouble(7, 30);
            keyframe3.set_PropertyValueDouble(8, 0);
            //animationTrack.InsertKeyframe(keyframe3, animationTrack.KeyframeCount);

            //// Set The Animation Track Name
            //animationTrack.Name = "Zoom Over Location From Bookmark";

            //// Set Track Attachments
            //animationTrack.AttachObject(globeCamera);
            //animationTrack.ApplyToAllViewers = true;

            //// Add The New Track To The Scene
            //animationTracks.AddTrack(animationTrack);
            #endregion

            #region 创建动画的中间点