/// <summary>
/// Computes the indices for a subline of the line.
/// (The subline must conform to the line; that is,
/// all vertices in the subline (except possibly the first and last)
/// must be vertices of the line and occcur in the same order).
/// </summary>
/// <param name="subLine">A subLine of the line.</param>
/// <returns>A pair of indices for the start and end of the subline..</returns>
public virtual double[] IndicesOf(Geometry subLine)
{
LinearLocation[] locIndex = LocationIndexOfLine.IndicesOf(linearGeom, subLine);
double[] index = new double[]
{
LengthLocationMap.GetLength(linearGeom, locIndex[0]),
LengthLocationMap.GetLength(linearGeom, locIndex[1]),
};
return(index);
}
/// <summary>
///
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
private LinearLocation LocationOf(double index)
{
return(LengthLocationMap.GetLocation(linearGeom, index));
}
/// <summary>
/// Computes the <see cref="Coordinate" /> for the point
/// on the line at the given index.
/// If the index is out of range the first or last point on the
/// line will be returned.
/// </summary>
/// <param name="index">The index of the desired point.</param>
/// <returns>The <see cref="Coordinate" /> at the given index.</returns>
public virtual ICoordinate ExtractPoint(double index)
{
LinearLocation loc = LengthLocationMap.GetLocation(linearGeom, index);
return(loc.GetCoordinate(linearGeom));
}
/// <summary>
/// Computes the length for a given <see cref="LinearLocation" />
/// on a linear <see cref="Geometry" />.
/// </summary>
/// <param name="linearGeom">The linear geometry to use.</param>
/// <param name="loc">The <see cref="LinearLocation" /> index of the location.</param>
/// <returns>The length for the <see cref="LinearLocation" />.</returns>
public static double GetLength(Geometry linearGeom, LinearLocation loc)
{
LengthLocationMap locater = new LengthLocationMap(linearGeom);
return(locater.GetLength(loc));
}
/// <summary>
/// Computes the <see cref="LinearLocation" /> for a
/// given length along a linear <see cref="Geometry" />.
/// </summary>
/// <param name="linearGeom">The linear geometry to use.</param>
/// <param name="length">The length index of the location.</param>
/// <returns>The <see cref="LinearLocation" /> for the length.</returns>
public static LinearLocation GetLocation(Geometry linearGeom, double length)
{
LengthLocationMap locater = new LengthLocationMap(linearGeom);
return(locater.GetLocation(length));
}