/// <summary>
/// Gets the bottomlevel of the branch. Interpolates linearly between points
/// </summary>
/// <param name="chainage"></param>
/// <returns></returns>
public double GetBottomLevelAtChainage(double chainage)
{
if (chainage <= ChainageStart)
return CrossSections.First().BottomLevel;
if (chainage >= ChainageEnd)
return CrossSections.Last().BottomLevel;
LinearSplineInterpolation lsp = new LinearSplineInterpolation(CrossSections.Select(xc=>xc.Chainage).ToList(), CrossSections.Select(xc=>xc.BottomLevel).ToList());
return lsp.Interpolate(chainage);
}
public XYPoint GetPointAtChainage(double chainage)
{
var distinctpoints = Points.DistinctBy(pp => pp.Chainage).ToList();
LinearSplineInterpolation lspx = new LinearSplineInterpolation(distinctpoints.Select(xc => xc.Chainage).ToList(), distinctpoints.Select(xc => xc.X).ToList());
LinearSplineInterpolation lspy = new LinearSplineInterpolation(distinctpoints.Select(xc => xc.Chainage).ToList(), distinctpoints.Select(xc => xc.Y).ToList());
return new XYPoint(lspx.Interpolate(chainage), lspy.Interpolate(chainage));
}