.\" RCSid "$Id: genworm.1,v 1.4 2018/05/04 23:56:49 greg Exp $"
.TH GENWORM 1 11/15/93 RADIANCE
.SH NAME
genworm - generate a RADIANCE description of a functional worm
.SH SYNOPSIS
.B "genworm mat name 'x(t)' 'y(t)' 'z(t)' 'r(t)' nseg"
[
.B "\-e expr"
][
.B "\-f file"
]
.SH DESCRIPTION
.I Genworm
produces a RADIANCE scene description of a
worm defined by the parametric equations
.I x(t),
.I y(t),
.I z(t),
and
.I r(t)
(the radius).
.I T
will vary from 0 to 1 in steps of
.I 1/nseg.
The surface will be composed of
.I nseg
cones or cylinders and
.I nseg+1
spheres.
The expressions are of the same type used in RADIANCE
function files.
Auxiliary expressions and/or files may be specified
in any number of
.I \-e
and
.I \-f
options.
The variable and function definitions in each
.I \-f source
file are read and compiled from the RADIANCE library where it is found.
.SH EXAMPLE
To generate a banana:
.IP "" .2i
genworm yellow banana '0' '5*sin(t)' '5*cos(t)' '.4-(.5-t)*(.5-t)' 20
.SH ENVIRONMENT
RAYPATH		the directories to check for auxiliary files.
.SH AUTHOR
Greg Ward
.SH BUGS
Since the worm is constructed of intersecting surfaces, only
opaque materials should be used with this object.
Also, a worm cannot double back inside itself without making a mess.
.SH "SEE ALSO"
genbox(1), genrev(1), gensurf(1), icalc(1), rpict(1), rvu(1), xform(1)