Initial population.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/input/arrows.input.pamphlet b/src/input/arrows.input.pamphlet
new file mode 100644
index 00000000..ec230fed
--- /dev/null
+++ b/src/input/arrows.input.pamphlet
@@ -0,0 +1,41 @@
+\documentclass{article}
+\usepackage{axiom}
+\begin{document}
+\title{\$SPAD/src/input arrows.input}
+\author{The Axiom Team}
+\maketitle
+\begin{abstract}
+\end{abstract}
+\eject
+\tableofcontents
+\eject
+\section{License}
+<<license>>=
+--Copyright The Numerical Algorithms Group Limited 1991.
+@
+<<*>>=
+<<license>>
+
+arrowAngle:=%pi-%pi/10.0@SF
+arrowScale:=0.2@SF
+
+makeArrow(p1,p2) ==
+    delta    :=p2 -p1
+    len      := arrowScale * length delta
+    theta := atan(delta.1, delta.2)
+    c1:= len*cos(theta+arrowAngle)
+    s1:= len*sin(theta+arrowAngle)
+    c2:= len*cos(theta-arrowAngle)
+    s2:= len*sin(theta-arrowAngle)
+    z:= p2.3*(1-arrowScale)
+    p3:=point[p2.1+c1,p2.2+s1,z,p2.4]
+    p4:=point[p2.1+c2,p2.2+s2,z,p2.4]
+    [[p1,p2,p3],[p2,p4]]
+
+
+@
+\eject
+\begin{thebibliography}{99}
+\bibitem{1} nothing
+\end{thebibliography}
+\end{document}