ArcGIS Pro SDK （九）几何 2 坐标
文章目录
- [ArcGIS Pro SDK （九）几何 2 坐标](#ArcGIS Pro SDK （九）几何 2 坐标)
-
- [1 矢量极坐标](#1 矢量极坐标)
- [2 获取矢量倾角](#2 获取矢量倾角)
- [3 获取矢量方位角](#3 获取矢量方位角)
- [4 向量运算](#4 向量运算)
- [5 2D 矢量操作](#5 2D 矢量操作)
- [6 生成器](#6 生成器)
环境：Visual Studio 2022 + .NET6 + ArcGIS Pro SDK 3.0
1 矢量极坐标
csharp
Coordinate3D polarVector = new Coordinate3D(0, 7, 0);
Tuple<double, double, double> 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
csharp
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/23 获取矢量方位角
csharp
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 = 3154 向量运算
csharp
// 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 = true5 2D 矢量操作
csharp
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<double, double> 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
csharp
// 点列表
List<MapPoint> points = new List<MapPoint>
{
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