/// <summary>
/// 获取指定速度下行驶时长后线中的点
/// </summary>
/// <param name="localtions">线路中的点</param>
/// <param name="startLocation">当前点</param>
/// <param name="speed">速度，单位km/h</param>
/// <param name="interval">间隔时间，单位s</param>
/// <param name="nextIndex">下一个关键点的索引</param>
/// <returns></returns>
public static LocationDto GetNextLation(List <LocationDto> localtions, LocationDto startLocation, double speed, int interval, ref int nextIndex)
{
var logger = Jt808TerminalEmulator.Core.DependencyInjectionExtensions.ServiceProvider.CreateScope().ServiceProvider.GetRequiredService <ILogger <LocationInterpolation> >();
if (nextIndex >= localtions.Count)
{
return(null);
}
var intervalDistance = speed / 3.6 * interval;
var nextDistance = intervalDistance;
for (; nextIndex < localtions.Count;)
{
var distance = LocationInterpolation.CalculateDistanceBetweenLocations(startLocation, localtions[nextIndex]);
if (distance < nextDistance)
{
nextDistance -= distance;
startLocation = localtions[nextIndex];
nextIndex++;
continue;
}
var endLocation = LocationInterpolation.IntermediaryLocation(startLocation, localtions[nextIndex], nextDistance);
distance = LocationInterpolation.CalculateDistanceBetweenLocations(endLocation, localtions[nextIndex]);
logger.LogInformation($"当前索引：{nextIndex}，差值{distance}起点[{startLocation.Logintude},{startLocation.Latitude}]终点,[{endLocation.Logintude},{endLocation.Latitude}],第{localtions[nextIndex].Order}个关键点[{localtions[nextIndex].Logintude},{localtions[nextIndex].Latitude}]");
return(endLocation);
}
return(default);
/// <summary>
/// 重新插值
/// </summary>
/// <param name="dto">线路</param>
/// <param name="speed">速度</param>
/// <param name="interval">间隔时间</param>
/// <param name="alldistance">线路总长度，单位m</param>
/// <returns></returns>
public static List <LocationDto> Reinterpolation(LineDto dto, double speed, int interval, out double alldistance)
{
var intervalDistance = speed / 3.6 * interval;
alldistance = 0d;
var locations = new List <LocationDto>
{
dto.Locations.First()
};
var nextDistance = intervalDistance;
var startLocation = locations.Last();
for (int i = 1; i < dto.Locations.Count - 1; i++)
{
var endLocation = dto.Locations[i];
alldistance += LocationInterpolation.CalculateDistanceBetweenLocations(dto.Locations[i - 1], endLocation);
while (true)
{
var distance = LocationInterpolation.CalculateDistanceBetweenLocations(startLocation, endLocation);
if (distance < nextDistance)
{
nextDistance -= distance;
startLocation = endLocation;
break;
}
nextDistance = intervalDistance;
startLocation = LocationInterpolation.IntermediaryLocation(startLocation, endLocation, intervalDistance);
locations.Add(startLocation);
}
}
return(locations);
}