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\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/input knot2.input}
\author{The Axiom Team}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
<<*>>=
)cl all
-- see how long this all takes
)set messages time on
-- this is the color function, nothing elaborate for now
f(x:SF):SF == x
--------------------------------------------------------------
-- Creation of the knot!!! --
-- only p/q is really used, but p and q correspond to --
-- the factors in the notes deriving these knotty things --
-- see the notes for detail...too involved to explain here --
--------------------------------------------------------------
[p,q] := [3,5]
PQ := p/q
l := lcm(p, q) quo p
maxRange := (odd? l => l * %pi::SF; 2 * l * %pi::SF)
theRange := 0..maxRange
-- create the knot
knot := tubePlot(sin t * cos(PQ*t),cos t * cos(PQ*t),cos t * sin(PQ*t),
f, theRange, 0.1::SF, 6, "open" )
-- make a viewport out of it
makeViewport3D(knot, concat ["knot", string p,string q])$VIEW3D
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
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