GENBLINDS(1)						      General Commands Manual						      GENBLINDS(1)

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, fol-
       lowed 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  coordi-
       nates 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)