NAME

    EyeRibbons

DESCRIPTION

      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.

INPUTS

    Molecule -- Pyramid
       (1..-layer, 1..-baseLat, n-D compression, n-compression type).
       The Chemistry Pyramid of correctly ordered backbone atoms.

    Colormap -- Lattice (Opt.)
       (1-D, 4-vector).
       Optional colourmap lattice. Default colour is white.

WIDGETS

    Width -- Slider
       Ribbon width.

    Segments -- Slider
       Number of segments to be used in a Foward Difference Method 
       calculation.

    Translate Helix -- Slider
       Widens helix by specified factor.

    Threads -- Slider
       Number of threads if "Threads" is selected.

    select -- Radio Box
       "Threads" or "Ribbons" selector.

OUTPUTS

    Output -- Geometry
       NURBS geometry information for threads (splines) or sheets (patches). 

KNOWN PROBLEMS

    Larger number of segments do not give a suitable ribbons 
    representation.

SEE ALSO

    
      EyeBackbone,EyeBalls, Render