基于ArcGIS开发动态视域效果
作者:互联网
说明
sdk为ArcGIS Runtime SDK for .NET
(100.9.0),参考资料有Viewshed (location),Viewshed for GeoElement
本文主要在动态视域的基础上添加了自定义路线,实现效果如图
Viewshed for GeoElement的官方示例为手动点击触发,想将其变为自定义路线循环运行,需要完成以下几点:
1.设置一个定时器,完成坦克移动的整个轨迹
2.MoveTank
方法每次只移动了一点点距离,需要循环调用来完成从一个点到另一个点的移动
3.基于上一点,每次调用完MoveTank
方法后,判断坦克是否达到目标点(这里允许有一些误差),以便切换到下一个目标点
关键代码
设置定时器
System.Timers.Timer animationTimer2 = new System.Timers.Timer(15000) { Enabled = true, AutoReset = true }; // - Move the tank every time the timer expires. animationTimer2.Elapsed += (o, e) => { MoveTankForRoute(); }; //马上执行一次 Task.Run(() => { MoveTankForRoute(); }); // - Start the timer. animationTimer2.Start();
单次路线的执行控制
private void MoveTankForRoute() { if (!isAnimateTank && isFinishRoute) { isFinishRoute = false; foreach (var p in route) { while (true) { MoveTank(p); var nowLocation = _tank.Geometry as MapPoint; //手动等待坦克到位 if (nowLocation.X = p.X - gap && nowLocation.Y = p.Y - gap) { break; } if (isAnimateTank) { break; } Thread.Sleep(60); } if (isAnimateTank) { break; } } isFinishRoute = true; } }
单次移动坦克一小段距离,加上坦克转向
private GeodeticDistanceResult MoveTank(MapPoint endPoint) { // Get the current location and distance from the destination. MapPoint location = (MapPoint)_tank.Geometry; //var rightMapPoint = GeometryEngine.Project(location, endPoint.SpatialReference) as MapPoint; GeodeticDistanceResult distance = GeometryEngine.DistanceGeodetic( location, endPoint, _metersUnit, _degreesUnit, GeodeticCurveType.Geodesic); // Move the tank a short distance. location = GeometryEngine.MoveGeodetic(new List() { location }, 1.0, _metersUnit, distance.Azimuth1, _degreesUnit, GeodeticCurveType.Geodesic).First(); _tank.Geometry = location; // Rotate to face the destination. double heading = (double)_tank.Attributes["HEADING"]; heading = heading + (distance.Azimuth1 - heading) / 10; _tank.Attributes["HEADING"] = heading; return distance; }
注意事项
坦克模型需要下载,如果安装了ArcGIS Runtime Local Server SDK
则有该模型,如果不想安装,也可以在Viewshed for GeoElement的Offline data
下下载
示例代码
CubeCollision.xaml
CubeCollision.xaml.cs
标签:distance,tank,视域,MapPoint,ArcGIS,location,动态,true,heading 来源: https://blog.51cto.com/u_15180952/2732695