xenial (1) genrev.1.gz

NAME

       genrev - generate a RADIANCE description of surface of revolution

SYNOPSIS

       genrev mat name 'z(t)' 'r(t)' nseg [ -e expr ][ -f file ][ -s ]

DESCRIPTION

       Genrev  produces a RADIANCE scene description of a surface of revolution.  The object will be composed of
       nseg cones, cups, cylinders, tubes or rings following the parametric curve defined by z(t)  (height)  and
       r(t)  (radius).   When  z is increasing with t, the surface normal points outward.  When z is decreasing,
       the normal points inward.  The variable t used in the function expressions varies from 0  to  1  in  even
       steps  of  1/nseg.   The  expressions  are  of  the same type used in RADIANCE function files.  Auxiliary
       expressions and/or files may be specified in any number of -e and -f options.  The -s option smooths  the
       surfaces using Phong normal interpolation.

EXAMPLE

       To generate a torus with an inner radius of 1 and an outer radius of 3:

         genrev steel torus 'sin(2*PI*t)' '2+cos(2*PI*t)' 32

AUTHOR

       Greg Ward

BUGS

       The -s option doesn't modify the surface normal correctly for the opposite side.

SEE ALSO

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