GENPRISM(1)						      General Commands Manual						       GENPRISM(1)

NAME

       genprism - generate a RADIANCE description of a prism

SYNOPSIS

       genprism mat name { - | vfile | N v1 v2 .. vN } [ -l lvect ][ -r radius ][ -c ][ -e ]

DESCRIPTION

       Genprism  produces  a  RADIANCE	scene  description of a prism, or extruded polygon.  The polygon to extrude lies in the z==0 plane, and is
       given as a list of (x,y) pairs on the standard input (-), or from the file vfile, or on the command line preceded by  the  number  of  ver-
       tices,  N.   The  order	of the vertices and the extrusion vector lvect (default (0,0,1)) determine the surface orientations.  The surfaces
       that make up the prism will be modified by mat and their identifiers will begin with name.  The -r option may be used to round the  corners
       of  the	object	using spheres and cylinders.  The -c option inhibits generation of a face connecting the last vertex to the first.  The -e
       option inhibits generation of the end polygons.

EXAMPLE

       To produce a equilateral triangular prism:

	 genprism clear_plastic prism 3 0 0 .5 .866 1 0

AUTHOR

       Greg Ward

BUGS

       The rounding option only works for opaque prisms with outward facing normals.  If the normals face inward, the appearance will be bizarre.

SEE ALSO

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

RADIANCE
							      3/19/96							       GENPRISM(1)