tsanie/Billing
1
1
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

separate location extension

Browse Source
This commit is contained in:
Tsanie Lily 2022-03-18 18:44:30 +08:00
parent 7ca377b8c2
commit b7affae8ab
4 changed files with 56 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Billing.Shared/Billing.Shared.projitems
View File

@ -22,6 +22,7 @@
<Compile Include="$(MSBuildThisFileDirectory)Helper.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Languages\PlatformCulture.cs" />
<Compile Include="$(MSBuildThisFileDirectory)Languages\Resource.cs" />
<Compile Include="$(MSBuildThisFileDirectory)LocationExtension.cs" />
<Compile Include="$(MSBuildThisFileDirectory)MainShell.xaml.cs">
<DependentUpon>MainShell.xaml</DependentUpon>
<SubType>Code</SubType>

33
Billing.Shared/Helper.cs
View File

@ -147,39 +147,6 @@ namespace Billing
}
return status;
}
private static double TransformLatitude(double x, double y)
{
var ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * Math.PI) + 20.0 * Math.Sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(y * Math.PI) + 40.0 * Math.Sin(y / 3.0 * Math.PI)) * 2.0 / 3.0;
ret += (160.0 * Math.Sin(y / 12.0 * Math.PI) + 320 * Math.Sin(y * Math.PI / 30.0)) * 2.0 / 3.0;
return ret;
}
private static double TransformLongitude(double x, double y)
{
var ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * Math.PI) + 20.0 * Math.Sin(2.0 * x * Math.PI)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(x * Math.PI) + 40.0 * Math.Sin(x / 3.0 * Math.PI)) * 2.0 / 3.0;
ret += (150.0 * Math.Sin(x / 12.0 * Math.PI) + 300.0 * Math.Sin(x / 30.0 * Math.PI)) * 2.0 / 3.0;
return ret;
}
public static (double longitude, double latitude) Wgs84ToGcj02(double longitude, double latitude)
{
var a = 6378245.0;
var ee = 0.00669342162296594323;
var offsetLatitude = TransformLatitude(longitude - 105.0, latitude - 35.0);
var offsetLongitude = TransformLongitude(longitude - 105.0, latitude - 35.0);
var radiusLatitude = latitude / 180.0 * Math.PI;
var magic = Math.Sin(radiusLatitude);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.Sqrt(magic);
offsetLatitude = offsetLatitude * 180.0 / (a * (1 - ee) / (magic * sqrtMagic) * Math.PI);
offsetLongitude = offsetLongitude * 180.0 / (a / sqrtMagic * Math.Cos(radiusLatitude) * Math.PI);
return (longitude + offsetLongitude, latitude + offsetLatitude);
}
}
public class AsyncLazy<T>

54
Billing.Shared/LocationExtension.cs Normal file
View File

@ -0,0 +1,54 @@
using System;
namespace Billing
{
public static class LocationExtension
{
private const double PI = 3.1415926535897931;
public static (double longitude, double latitude) Wgs84ToGcj02(this (double lon, double lat) position)
{
if (IsOutOfChina(position.lon, position.lat))
{
return position;
}
var a = 6378245d;
var ee = 0.00669342162296594323;
var offsetLatitude = TransformLatitude(position.lon - 105d, position.lat - 35d);
var offsetLongitude = TransformLongitude(position.lon - 105d, position.lat - 35d);
var radiusLatitude = position.lat / 180d * PI;
var magic = 1d - ee * Math.Pow(Math.Sin(radiusLatitude), 2);
var sqrtMagic = Math.Sqrt(magic);
offsetLatitude = offsetLatitude * 180d / (a * (1d - ee) / (magic * sqrtMagic) * PI);
offsetLongitude = offsetLongitude * 180d / (a / sqrtMagic * Math.Cos(radiusLatitude) * PI);
return (position.lon + offsetLongitude, position.lat + offsetLatitude);
}
private static bool IsOutOfChina(double lon, double lat)
{
return lon < 72.004 || lon > 137.8347
|| lat < 0.8293 || lat > 55.8171;
}
private static double TransformLatitude(double x, double y)
{
var ret = -100d + 2d * x + 3d * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.Sqrt(Math.Abs(x));
ret += (20d * Math.Sin(6d * x * PI) + 20d * Math.Sin(2d * x * PI)) * 2d / 3d;
ret += (20d * Math.Sin(y * PI) + 40d * Math.Sin(y / 3d * PI)) * 2d / 3d;
ret += (160d * Math.Sin(y / 12d * PI) + 320d * Math.Sin(y * PI / 30d)) * 2d / 3d;
return ret;
}
private static double TransformLongitude(double x, double y)
{
var ret = 300d + x + 2d * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.Sqrt(Math.Abs(x));
ret += (20d * Math.Sin(6d * x * PI) + 20d * Math.Sin(2d * x * PI)) * 2d / 3d;
ret += (20d * Math.Sin(x * PI) + 40d * Math.Sin(x / 3d * PI)) * 2d / 3d;
ret += (150d * Math.Sin(x / 12d * PI) + 300d * Math.Sin(x / 30d * PI)) * 2d / 3d;
return ret;
}
}
}

2
Billing.Shared/Views/ViewLocationPage.cs
View File

@ -14,7 +14,7 @@ namespace Billing.Views
if (bill.Latitude != null && bill.Longitude != null)
{
var (longitude, latitude) = Helper.Wgs84ToGcj02(bill.Longitude.Value, bill.Latitude.Value);
var (longitude, latitude) = (bill.Longitude.Value, bill.Latitude.Value).Wgs84ToGcj02();
var position = new Position(latitude, longitude);
var mapSpan = new MapSpan(position, 0.01, 0.01);
Content = new Map(mapSpan)