NAME

       genblinds - generate a RADIANCE description of venetian blinds

SYNOPSIS

       genblinds mat name depth width height nslats angle [ -r|+r rcurv ]

DESCRIPTION

       Genblinds  produces a RADIANCE scene description of a set of venetian blinds.  The depth of the blinds (X
       dimension) is given first, followed by the width (Y dimension), followed by  the  height  (Z  dimension).
       The number of slats to place evenly within this height is given as nslats.  The angle of the blind, where
       zero is perfectly horizontal and a positive angle tilts the positive X edge upwards, is given in degrees.
       The  blinds are initially situated so that the corner of the bottom blind is height/nslats/2 above the XY
       plane, and all coordinates are positive.  Each new slat is placed height/nslats above the  previous  one,
       until the top slat is at height - height/nslats/2 .  The blinds may of course be moved from this starting
       point with the xform(1) command.

       If  curved  blinds are desired, a radius of curvature may be given with the +/-r option.  If given as +r,
       The curvature is upward (which is the usual configuration).  If the option  is  given  as  -r,  then  the
       curvature  is  downward.   The  radius  indicates how far from each slat its effective cylindrical center
       resides.  Each slat will be broken into as many polygons as is necessary to keep  the  delta  changes  in
       angle less than 10 degrees.  (Note that this may result in a rather large number of polygons.)

EXAMPLE

       To produce a curved set of blinds with 25 slats at 15 degrees:

         genblinds white blind 1 46 88 25 15 -r 1 > blinds.rad

AUTHOR

       Jean-Louis Scartezzini and Greg Ward

SEE ALSO

       genrbox(1), genrev(1), gensurf(1), genworm(1), rpict(1), rvu(1), xform(1)

RADIANCE                                            10/10/94                                        GENBLINDS(1)