/// <summary>
/// Add a cylinder, defined by the center (`x', `y', `z') of its first
/// circular face, the 3 components (`dx', `dy', `dz') of the vector defining
/// its axis and its radius `r'. The optional `angle' argument defines the
/// angular opening (from 0 to 2*Pi). If `tag' is positive, set the tag
/// explicitly; otherwise a new tag is selected automatically. Return the tag
/// of the cylinder.
/// </summary>
public int AddCylinder(double x, double y, double z, double dx, double dy, double dz, double r, int tag = -1, double angle = 2 *Math.PI)
{
var api = GMshNativeMethods.gmshModelOccAddCylinder(x, y, z, dx, dy, dz, r, tag, angle, ref ierr);
if (ierr != 0)
{
throw new GMshException(ierr);
}
return(api);
}