private static extern void GetRecommendationsOneGroup(
UserRequirementFromCSharp reqirement,
ref IntPtr routes,
ref int level,
ref IntPtr error_code,
ref IntPtr error,
ref IntPtr remark,
ref int route_group_nums,
ref int route_size_in_routes,
ref IntPtr first_route_of_one_size_array);
public async Task <double> GetDirectedDistanceAsync(UserRequirementFromCSharp userRequirement)
{
var startCityLngAndLatTask = GetLongitudeAndLatitudeDictionaryAsync(userRequirement.start_cities);
var arrivalCityLngAndLatTask = GetLongitudeAndLatitudeDictionaryAsync(userRequirement.arrive_cities);
var startCityLngAndLat = await startCityLngAndLatTask;
var arrivalCityLngAndLat = await arrivalCityLngAndLatTask;
double R = 6371;//地球半径
return(Math.Acos(Math.Sin((Math.PI / 180) * startCityLngAndLat["lat"]) * Math.Sin((Math.PI / 180) * arrivalCityLngAndLat["lat"]) +
Math.Cos((Math.PI / 180) * startCityLngAndLat["lat"]) * Math.Cos((Math.PI / 180) * arrivalCityLngAndLat["lat"]) *
Math.Cos((Math.PI / 180) * arrivalCityLngAndLat["lng"] - (Math.PI / 180) * startCityLngAndLat["lng"])) * R);
}
public async Task <IEnumerable <IEnumerable <Route> > > GetRouteFromCppAsync()
{
return(await Task.Run(() =>
{
int level = 0;
IntPtr error_code = new IntPtr();
IntPtr error = new IntPtr();
IntPtr remark = new IntPtr();
int route_group_nums = 0;
int route_size_in_routes = 0;
IntPtr first_route_of_one_size_array = new IntPtr();
IntPtr routesFromCpp = new IntPtr();
List <List <Route> > routes = new List <List <Route> >();
UserRequirementFromCSharp userRequirement = (UserRequirementFromCSharp)_userRequirement;
GetRecommendationsOneGroup(userRequirement, ref routesFromCpp, ref level, ref error_code, ref error, ref remark, ref route_group_nums, ref route_size_in_routes, ref first_route_of_one_size_array);
if (level != 0)//出现了异常了
{
string errorCodeStr = Marshal.PtrToStringAnsi(error_code);
string errorMessage = Marshal.PtrToStringAnsi(error);
DealExceptionFromCpp(level, errorCodeStr, errorMessage);
}
if (remark != null)
{
_remark = Marshal.PtrToStringAnsi(remark);
}
int[] first_route_of_one_size_array_managed = new int[route_group_nums];
if (first_route_of_one_size_array != null)
{
Marshal.Copy(first_route_of_one_size_array, first_route_of_one_size_array_managed, 0, route_group_nums);
}
IntPtr[] result = new IntPtr[route_size_in_routes];
if (routesFromCpp != null)
{
Marshal.Copy(routesFromCpp, result, 0, route_size_in_routes);
}
if (result.Length == 0)
{
throw new CustomExceptionOfHongJieSun(3, "ROUTE_RESULT_EMPTY", "对不起，该需求暂时没有可推荐的结果");
}
int routeReadStartIndex = 0;//开始读取线路的下标
for (int i = 0; i < route_group_nums; i++)
{
routes.Add(new List <Route>(first_route_of_one_size_array_managed[i]));
if (first_route_of_one_size_array_managed[i] == 1)
{
routes[i].Add(Marshal.PtrToStructure <Route>(result[routeReadStartIndex]));
routeReadStartIndex++;
continue;
}
else if (first_route_of_one_size_array_managed[i] == 2)
{
routes[i].Add(Marshal.PtrToStructure <Route>(result[routeReadStartIndex]));
routeReadStartIndex++;
routes[i].Add(Marshal.PtrToStructure <Route>(result[routeReadStartIndex]));
routeReadStartIndex++;
continue;
}
else
{
throw new CustomExceptionOfHongJieSun(1, "ERROR_SIZE_OF_ONE_ROUTE", $"first_route_of_one_size_array_managed[{i}]={first_route_of_one_size_array_managed[i]}错误的大小，只有1或2正确");
}
}
FreeMemoryOneGroup(ref routesFromCpp, ref first_route_of_one_size_array, route_size_in_routes);
return routes;
}));
}
