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====== colcode2uint32 (reference only) ======
<file>  colcode2uint32  - convert from colcode to uint32 array
 
  FORMAT:       outarray = colcode2uint32(inarray)
 
  Input fields:
 
        inarray     Nx4 input array of type colcolde
                    (n, 1) = color index or NaN
                    (n, 2) = red component (0...255)
                    (n, 3) = green component (0...255)
                    (n, 4) = blue component (0...255)
 
  Output fields:
 
        outarray    Nx1 uint32 array
 
  See also uint322colcode</file>

===== Notes =====
For performance reasons, BrainVoyager supports both index based coloring (e.g. two-color curvature information, or for painting/cutting during flattening) *and* RGB coloring. To store both kinds of information in a separable way, 3 bytes per vertex would not have been sufficient.

Internally, any RGB colored vertex is stored with hexadecimal ''0x3f'' prefix (which resembles single-precision floating point numbers in the range between 0.5 and 2). Index based colors are stored with a prefix of ''0x00''. Currently, alpha information is not supported (per vertex).