ArcGIS Pro SDK （九）几何 8 线段

文章目录

[ArcGIS Pro SDK （九）几何 8 线段](#ArcGIS Pro SDK （九）几何 8 线段)
- [1 使用两个地图点构造线段](#1 使用两个地图点构造线段)
- [2 更改线段坐标](#2 更改线段坐标)

环境：Visual Studio 2022 + .NET6 + ArcGIS Pro SDK 3.0

1 使用两个地图点构造线段

csharp 复制代码

// 使用 builderEx 的便捷方法或使用 builderEx 构造函数。

MapPoint startPt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint endPt = MapPointBuilderEx.CreateMapPoint(2.0, 1.0);

// BuilderEx 的便捷方法不需要在 MCT 上运行。
LineSegment lineFromMapPoint = LineBuilderEx.CreateLineSegment(startPt, endPt);

// coordinate2D
Coordinate2D start2d = (Coordinate2D)startPt;
Coordinate2D end2d = (Coordinate2D)endPt;

LineSegment lineFromCoordinate2D = LineBuilderEx.CreateLineSegment(start2d, end2d);

// coordinate3D
Coordinate3D start3d = (Coordinate3D)startPt;
Coordinate3D end3d = (Coordinate3D)endPt;

LineSegment lineFromCoordinate3D = LineBuilderEx.CreateLineSegment(start3d, end3d);

// lineSegment
LineSegment anotherLineFromLineSegment = LineBuilderEx.CreateLineSegment(lineFromCoordinate3D);


// builderEx 的构造函数不需要在 MCT 上运行
LineBuilderEx lbEx = new LineBuilderEx(startPt, endPt);
lineFromMapPoint = lbEx.ToSegment() as LineSegment;

lbEx = new LineBuilderEx(start2d, end2d);
lineFromCoordinate2D = lbEx.ToSegment() as LineSegment;

lbEx = new LineBuilderEx(start3d, end3d);
lineFromCoordinate3D = lbEx.ToSegment() as LineSegment;

lbEx = new LineBuilderEx(startPt, endPt);
lineFromMapPoint = lbEx.ToSegment() as LineSegment;

lbEx = new LineBuilderEx(lineFromCoordinate3D);
anotherLineFromLineSegment = lbEx.ToSegment() as LineSegment;

2 更改线段坐标

csharp 复制代码

// builderEx 的构造函数不需要在 MCT 上运行
LineBuilderEx lbuilderEx = new LineBuilderEx(lineSegment);
// 查找现有的坐标
lbuilderEx.QueryCoords(out startPt, out endPt);

// 或者使用
//startPt = lbuilderEx.StartPoint;
//endPt = lbuilderEx.EndPoint;

// 更新坐标
lbuilderEx.SetCoords(GeometryEngine.Instance.Move(startPt, 10, 10) as MapPoint, GeometryEngine.Instance.Move(endPt, -10, -10) as MapPoint);

// 或者使用
//lbuilderEx.StartPoint = GeometryEngine.Instance.Move(startPt, 10, 10) as MapPoint;
//lbuilderEx.EndPoint = GeometryEngine.Instance.Move(endPt, -10, -10) as MapPoint;

LineSegment segment2 = lbuilderEx.ToSegment() as LineSegment;