--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/orig/pdfblur.csh	Sat Apr 09 17:55:16 2011 +0100
@@ -0,0 +1,23 @@
+#!/bin/csh -f
+# RCSid: $Id: pdfblur.csh,v 2.6 2005/01/18 01:37:43 greg Exp $
+#
+# Generate views for depth-of-field blurring on picture
+#
+if ($#argv != 3) then
+	echo "Usage: $0 aperture nsamp viewfile"
+	exit 1
+endif
+set a = "$1"
+set n = "$2"
+set vf = "$3"
+cnt $n | rcalc -e `vwright i < $vf` \
+-e "M:$n/5+1;a:$a/2;N:$n;" -e 'tmax:PI*a*(M+1)' \
+-e 't=tmax/N*($1+rand($1))' \
+-e 'theta=2*M*PI/(M-1)*(M-sqrt(M*M-(M-1)/(PI*a)*t))' \
+-e 'r=a*(1-(M-1)/(2*M*M*PI)*theta)' \
+-e 'rcost=r*cos(theta);rsint=r*sin(theta)' \
+-e 'opx=ipx+rcost*ihx+rsint*ivx' \
+-e 'opy=ipy+rcost*ihy+rsint*ivy' \
+-e 'opz=ipz+rcost*ihz+rsint*ivz' \
+-e 'os=is-rcost/(id*ihn);ol=il-rsint/(id*ivn)' \
+-o 'VIEW= -vp ${opx} ${opy} ${opz} -vs ${os} -vl ${ol}'