This Geometry module is an implementation of the Ribbons Algorithm
by Mike Carson. It inputs a Chemistry Pyramid, calculates guide
coordinates, and outputs protein ribbons as either threads or
sheets. The Chemistry Pyramid should only contain the peptide
backbone atoms (groups of N, C-alpha, C and O) in the correct order
of appearance in the chain.
Molecule -- Pyramid
(1..-layer, 1..-baseLat, n-D compression, n-compression type).
The Chemistry Pyramid of correctly ordered backbone atoms.
Colormap -- Lattice (Opt.)
Optional colourmap lattice. Default colour is white.
Width -- Slider
Segments -- Slider
Number of segments to be used in a Foward Difference Method
Translate Helix -- Slider
Widens helix by specified factor.
Threads -- Slider
Number of threads if "Threads" is selected.
select -- Radio Box
"Threads" or "Ribbons" selector.
Output -- Geometry
NURBS geometry information for threads (splines) or sheets (patches).
Larger number of segments do not give a suitable ribbons