/// <summary>
/// TODO
/// </summary>
/// <param name="nat"></param>
/// <param name="axis"></param>
/// <returns></returns>
private Vector3d GetTangent(Curve3d nat, Axis axis)
{
var vec = new Vector3d();
try
{
if (nat is LinearEntity3d || nat.IsClosed())
{
vec = axis.ToVector();
}
else if (nat.StartPoint == axis.Start || nat.EndPoint == axis.Start)
{
using (var curved = nat.GetClosestPointTo(axis.Start))
{
vec = curved.GetDerivative(1).GetNormal() * axis.Length;
}
using (var curved2 = nat.GetClosestPointTo(axis.Start + vec))
{
if (curved2.Point.IsEqualTo(axis.Start))
{
vec = vec.Negate();
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e);
MailAgent.Report(e.Message);
}
return(vec);
}
public ICurve CurveToSpeckle(Curve3d curve)
{
if (curve.IsPlanar(out AC.Plane pln))
{
if (curve.IsPeriodic(out double period) && curve.IsClosed())
{
}
if (curve.IsLinear(out Line3d line)) // defaults to polyline
{
if (null != line)
{
return(LineToSpeckle(line));
}
}
}
return(NurbsToSpeckle(curve as NurbCurve3d));
}