#c __FILE__: ../../src/volview.sl
#c __LINE__: 391
\function{volview}
\synopsis{Display a 3D volume array within a graphical user interface}
\usage{volview(3D_or_4D_volume_array [; x=<x0>, y=<y0>, z=<z0>])}
\description
 This function will launch a GUI in which the given volume will be
 displayed, using the optional x,y,z qualifiers to set the initial
 viewing angle.  From there the volume may be rotated along any
 axis, zoomed in or out, or saved to a variety of output file formats.

 Right-clicking on the image after rendering will launch a menu from
 which rendering parameters (e.g. colormap, opacity) may be modified.
\notes
 The input array may have either 3 or 4 dimensions, none of which may
 be zero in length.  When a 4D array is given the first element is
 selected as the 3D volume to be visualized.
\seealso{volpack, SLgtk}
\done