Points_ to append to.Radius_ is the radius of the cylinder.Height_ is the height of the cylinder.NumPoints_ is the number of points to generate.IncludeEndCaps_ determines whether or not points are generated on the end caps of the cylinder.SpiralSeed_ is the starting index for golden spiral generation. When using this method to continue a spiral started elsewhere, `SpiralSeed_ should equal the number of particles already created.