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ArcGIS Pro SDK （九）几何 3 点
文章目录
环境：Visual Studio 2022 + .NET6 + ArcGIS Pro SDK 3.0
1 构造地图点
// 使用生成器便捷方法或使用生成器构造函数。 // 创建一个带M的3D点 MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 2.0, 3.0, 4.0); // builderEx构造函数不需要在MCT上运行。 MapPointBuilderEx mb = new MapPointBuilderEx(1.0, 2.0, 3.0, 4.0); // 对生成器做一些操作 MapPoint ptWithM = mb.ToGeometry(); MapPoint clone = ptWithM.Clone() as MapPoint; MapPoint anotherM = MapPointBuilderEx.CreateMapPoint(ptWithM); MapPointBuilderEx builderEx = new MapPointBuilderEx(1.0, 2.0, 3.0); builderEx.HasM = true; builderEx.M = 4.0; pt = builderEx.ToGeometry() as MapPoint; // 或者使用另一种带builderEx构造函数的方法 builderEx = new MapPointBuilderEx(1.0, 2.0, true, 3.0, true, 4.0, false, 0); pt = builderEx.ToGeometry() as MapPoint; // 或者使用builderEx便捷方法 pt = MapPointBuilderEx.CreateMapPoint(1.0, 2.0, 3.0, 4.0); 2 地图点生成器属性
// 使用builderEx便捷方法或builderEx构造函数。 // 这些都不需要在MCT上运行。 MapPoint point1 = null; MapPoint point2 = null; MapPointBuilderEx mb = new MapPointBuilderEx(1.0, 2.0, 3.0); bool bhasZ = mb.HasZ; // hasZ = true bool bhasM = mb.HasM; // hasM = false bool bhasID = mb.HasID; // hasID = false // 对生成器做一些操作 point1 = mb.ToGeometry(); // 修改一些生成器属性 mb.X = 11; mb.Y = 22; mb.HasZ = false; mb.HasM = true; mb.M = 44; // 创建另一个点 point2 = mb.ToGeometry(); double x = point1.X; // x = 1.0 double y = point1.Y; // y = 2.0 double z = point1.Z; // z = 3.0 double m = point1.M; // m = Nan int ID = point1.ID; // ID = 0 bool hasZ = point1.HasZ; // hasZ = true bool hasM = point1.HasM; // hasM = false bool hasID = point1.HasID; // hasID = false bool isEmpty = point1.IsEmpty; // isEmpty = false bool isEqual = point1.IsEqual(point2); // isEqual = false // builderEx便捷方法 MapPoint point3 = MapPointBuilderEx.CreateMapPoint(point1); x = point3.X; // x = 1.0 y = point3.Y; // y = 2.0 z = point3.Z; // z = 3.0 m = point3.M; // m = Nan ID = point3.ID; // ID = 0 hasZ = point3.HasZ; // hasZ = true hasM = point3.HasM; // hasM = false hasID = point3.HasID; // hasID = false MapPointBuilderEx builderEx = new MapPointBuilderEx(point1); x = builderEx.X; // x = 1.0 y = builderEx.Y; // y = 2.0 z = builderEx.Z; // z = 3.0 m = builderEx.M; // m = Nan ID = builderEx.ID; // ID = 0 hasZ = builderEx.HasZ; // hasZ = true hasM = builderEx.HasM; // hasM = false hasID = builderEx.HasID; // hasID = false isEmpty = builderEx.IsEmpty; // isEmpty = false MapPoint point4 = builderEx.ToGeometry() as MapPoint; MapPoint point5 = MapPointBuilderEx.CreateMapPoint(point1); x = point5.X; // x = 1.0 y = point5.Y; // y = 2.0 z = point5.Z; // z = 3.0 m = point5.M; // m = Nan ID = point5.ID; // ID = 0 hasZ = point5.HasZ; // hasZ = true hasM = point5.HasM; // hasM = false hasID = point5.HasID; // hasID = false isEmpty = point5.IsEmpty; // isEmpty = false 3 地图点的相等性
MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4, 5); int ID = pt1.ID; // ID = 5 bool hasID = pt1.HasID; // hasID = true MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4, 0); ID = pt2.ID; // ID = 0 hasID = pt2.HasID; // hasID = true MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4); ID = pt3.ID; // ID = 0 hasID = pt3.HasID; // hasID = false MapPoint pt4 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 44); ID = pt4.ID; // ID = 0 hasID = pt4.HasID; // hasID = false bool hasM = pt4.HasM; // hasM = true MapPoint pt5 = MapPointBuilderEx.CreateMapPoint(1, 2, 3); ID = pt5.ID; // ID = 0 hasID = pt5.HasID; // hasID = false hasM = pt5.HasM; // hasM = false bool isEqual = pt1.IsEqual(pt2); // isEqual = false, 不同的ID isEqual = pt2.IsEqual(pt3); // isEqual = false, HasID不同 isEqual = pt4.IsEqual 4 缩放至指定点
//创建一个点 var pt = MapPointBuilderEx.CreateMapPoint(x, y, SpatialReferenceBuilder.CreateSpatialReference(4326)); //对其进行缓冲 - 目的是缩放 var poly = GeometryEngine.Instance.Buffer(pt, buffer_size); //是否需要投影缓冲区多边形? if (!MapView.Active.Map.SpatialReference.IsEqual(poly.SpatialReference)) { //投影多边形 poly = GeometryEngine.Instance.Project(poly, MapView.Active.Map.SpatialReference); } // 必须在MCT上运行。 QueuedTask.Run(() => { //缩放 - 为动画效果添加延迟 MapView.Active.ZoomTo(poly, new TimeSpan(0, 0, 0, 3)); }); 