ArcGIS Pro SDK （九）几何 2 坐标

文章目录

• ArcGIS Pro SDK （九）几何 2 坐标
• • 1 矢量极坐标
  • 2 获取矢量倾角
  • 3 获取矢量方位角
  • 4 向量运算
  • 5 2D 矢量操作
  • 6 生成器

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

1 矢量极坐标

Coordinate3D polarVector = new Coordinate3D(0, 7, 0); Tuple polarComponents = polarVector.QueryPolarComponents(); // polarComponents.Item1 = 0  (方位角) // polarComponents.Item2 = 0 (倾角) // polarComponents.Item3 = 7 (大小)  polarVector.SetPolarComponents(Math.PI / 4, Math.PI / 2, 8); polarComponents = polarVector.QueryComponents(); // polarComponents.Item1 = 0 (x) // polarComponents.Item2 = 0 (y) // polarComponents.Item3 = 7 (z) 

2 获取矢量倾角

Coordinate3D v = new Coordinate3D(0, 0, 7); double inclination = v.Inclination;         // inclination = PI/2  v.SetComponents(-2, -3, 0); inclination = v.Inclination;                // inclination = 0  v.SetComponents(0, 0, -2); inclination = v.Inclination;                // inclination = -PI/2 

3 获取矢量方位角

Coordinate3D vector = new Coordinate3D(0, 7, 0); double azimuth = vector.Azimuth;      // azimuth = 0  vector.SetComponents(1, 1, 42); azimuth = vector.Azimuth; double degrees = AngularUnit.Degrees.ConvertFromRadians(azimuth);       // degrees = 45  vector.SetComponents(-8, 8, 2); azimuth = vector.Azimuth; degrees = AngularUnit.Degrees.ConvertFromRadians(azimuth);              // degrees = 315 

4 向量运算

// 简单的3D向量 Coordinate3D v = new Coordinate3D(0, 1, 0); // v.Magnitude = 1  Coordinate3D other = new Coordinate3D(-1, 0, 0); // other.Magnitude = -1  double dotProduct = v.DotProduct(other);      // dotProduct = 0  Coordinate3D crossProduct = v.CrossProduct(other); // crossProduct.X = 0 // crossProduct.Y = 0 // crossProduct.Z = 1  Coordinate3D addVector = v.AddCoordinate3D(other); // addVector.X = -1 // addVector.Y = 1 // addVector.Z = 0  // 绕x轴旋转 Coordinate3D w = v; w.Rotate(Math.PI, other); // w.X = 0 // w.Y = -1 // w.Z = 0  w.Scale(0.5); // w.X = 0 // w.Y = -0.5 // w.Z = 0  w.Scale(-4); // w.X = 0 // w.Y = 2 // w.Z = 0 // w.Magnitude = 2  w.Move(3, 2, 0); // w.X = 3 // w.Y = 4 // w.Z = 0 // w.Magnitude = 5  Coordinate3D emptyVector = new Coordinate3D(); // emptyVector = (0, 0, 0) emptyVector.SetEmpty(); // emptyVector = (Nan, Nan, Nan)  Coordinate3D c1 = new Coordinate3D(2, 3, 4); Coordinate3D c2 = new Coordinate3D(9, -1, 3);  var result_add = c1 + c2; // result_add = (11, 2, 7) var result_sub = c1 - c2; // result_sub = (-7, 4, 1)  var b = result_sub != result_add; // b = true  result_add = emptyVector + c1; // result_add = (Nan, Nan, Nan)  b = result_add == emptyVector; // b = true 

5 2D 矢量操作

Coordinate2D v = new Coordinate2D(0, 1); // v.Magnitude = 1  Coordinate2D other = new Coordinate2D(-1, 0); double dotProduct = v.DotProduct(other); // dotProduct = 0  Coordinate2D w = v + other; // w = (-1, 1)  w += other; // w = (-2, 1)  w -= other; // w = (-1, 1)  w = v; w.Rotate(Math.PI, other); // w = (-2, -1)  w = other;  w.Scale(-4); // w = (4, 0) // w.Magnitude = 4  w.Move(-1, 4); // w = (3, 4) // w.Magnitude = 5  w.Move(-6, -1); Tuple components = w.QueryComponents(); // components = (-3, 3) // w.Magnitude = 3 * Math.Sqrt(2)  Coordinate2D unitVector = w.GetUnitVector(); // w = (-Math.Sqrt(2) / 2, Math.Sqrt(2) / 2) // w.Magnitude = 1  w.SetComponents(3, 4); 

6 生成器

// 点列表 List points = new List {   MapPointBuilderEx.CreateMapPoint(0, 0, 2, 3, 1),   MapPointBuilderEx.CreateMapPoint(1, 1, 5, 6),   MapPointBuilderEx.CreateMapPoint(2, 1, 6),   MapPointBuilderEx.CreateMapPoint(0, 0) };  // 将有属性，因为它是通过便捷方法创建的 Polyline polylineWithAttrs = PolylineBuilderEx.CreatePolyline(points); bool hasZ = polylineWithAttrs.HasZ;          // hasZ = true bool hasM = polylineWithAttrs.HasM;          // hasM = true bool hasID = polylineWithAttrs.HasID;        // hasID = true  // 将没有属性，因为它被指定为参数 Polyline polylineWithoutAttrs =    PolylineBuilderEx.CreatePolyline(points, AttributeFlags.None); hasZ = polylineWithoutAttrs.HasZ;          // hasZ = false hasM = polylineWithoutAttrs.HasM;          // hasM = false hasID = polylineWithoutAttrs.HasID;        // hasID = false  // 将有属性，因为它是通过便捷方法创建的 Polygon polygonWithAttrs = PolygonBuilderEx.CreatePolygon(points); hasZ = polygonWithAttrs.HasZ;               // hasZ = true hasM = polygonWithAttrs.HasM;               // hasM = true hasID = polygonWithAttrs.HasID;             // hasID = true  // 将没有属性，因为它被指定为参数 Polygon polygonWithoutAttrs =        PolygonBuilderEx.CreatePolygon(points, AttributeFlags.None); hasZ = polygonWithoutAttrs.HasZ;               // hasZ = false hasM = polygonWithoutAttrs.HasM;               // hasM = false hasID = polygonWithoutAttrs.HasID;             // hasID = false  // 将没有属性，因为它被指定为参数 PolylineBuilderEx polylineB =             new PolylineBuilderEx(points, AttributeFlags.None); hasZ = polylineB.HasZ;                      // hasZ = false hasM = polylineB.HasM;                      // hasM = false hasID = polylineB.HasID;                    // hasID = false  // 将有属性，因为它传递了一个带属性的折线 polylineB = new PolylineBuilderEx(polylineWithAttrs); hasZ = polylineB.HasZ;                      // hasZ = true hasM = polylineB.HasM;                      // hasM = true hasID = polylineB.HasID;                    // hasID = true  // 将没有属性，因为它传递了一个不带属性的折线 polylineB = new PolylineBuilderEx(polylineWithoutAttrs); hasZ = polylineB.HasZ;                      // hasZ = false hasM = polylineB.HasM;                      // hasM = false hasID = polylineB.HasID;                    // hasID = false  // 将没有属性，因为它被指定为参数 PolygonBuilderEx polygonB = new PolygonBuilderEx(points, AttributeFlags.None); hasZ = polygonB.HasZ;                       // hasZ = false hasM = polygonB.HasM;                       // hasM = false hasID = polygonB.HasID;                     // hasID = false  // 将有属性，因为它传递了一个带属性的多边形 polygonB = new PolygonBuilderEx(polygonWithAttrs); hasZ = polygonB.HasZ;                       // hasZ = true hasM = polygonB.HasM;                       // hasM = true hasID = polygonB.HasID;                     // hasID = true  // 将没有属性，因为它传递了一个不带属性的多边形 polygonB = new PolygonBuilderEx(polygonWithoutAttrs); hasZ = polygonB.HasZ;                       // hasZ = true hasM = polygonB.HasM;                       // hasM = true hasID = polygonB.HasID;                     // hasID = true