public static IMesh Twist(IMesh mesh, Line axis, double angleFactor)
{
IMesh dM = mesh.DeepCopy();
IPoint3D pt;
double d;
ITransformX T;
IPoint3D origin = new IPoint3D(axis.FromX, axis.FromY, axis.FromZ);
IVector3D direction = IVector3D.CreateVector(axis.To, axis.From);
foreach (int vK in dM.VerticesKeys)
{
pt = dM.GetVertexWithKey(vK).Position;
d = axis.DistanceTo(pt.RhinoPoint, true);
T = new ITransformX();
T.RotateAboutAxis(d * angleFactor, origin, direction);
pt.Transform(T);
dM.SetVertexPosition(vK, pt);
}
dM.UpdateGraphics();
return(dM);
}
